src/web_client.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4 #include <unistd.h>
   5 #include <stdlib.h>
   6 #include <sys/types.h>
   7 #include <sys/socket.h>
   8 #include <netinet/in.h>
   9 #include <arpa/inet.h>
  10 #include <errno.h>
  11 #include <pthread.h>
  12 #include <sys/stat.h>
  13 #include <fcntl.h>
  14 #include <malloc.h>
  15 #include <pwd.h>
  16 #include <grp.h>
  17 #include <ctype.h>
  18 #include <poll.h>
  19
  20 // TCP_CORK
  21 #include <netinet/tcp.h>
  22
  23 #include "common.h"
  24 #include "log.h"
  25 #include "appconfig.h"
  26 #include "url.h"
  27 #include "web_buffer.h"
  28 #include "web_server.h"
  29 #include "global_statistics.h"
  30 #include "rrd.h"
  31 #include "rrd2json.h"
  32 #include "registry.h"
  33
  34 #include "web_client.h"
  35
  36 #define INITIAL_WEB_DATA_LENGTH 16384
  37 #define WEB_REQUEST_LENGTH 16384
  38 #define TOO_BIG_REQUEST 16384
  39
  40 int web_client_timeout = DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS;
  41
  42 #ifdef NETDATA_WITH_ZLIB
  43 int web_enable_gzip = 1, web_gzip_level = 3, web_gzip_strategy = Z_DEFAULT_STRATEGY;
  44 #endif /* NETDATA_WITH_ZLIB */
  45
  46 extern int netdata_exit;
  47
  48 struct web_client *web_clients = NULL;
  49 unsigned long long web_clients_count = 0;
  50
  51 inline int web_client_crock_socket(struct web_client *w) {
  52 #ifdef TCP_CORK
  53         if(likely(!w->tcp_cork && w->ofd != -1)) {
  54                 w->tcp_cork = 1;
  55                 if(unlikely(setsockopt(w->ofd, IPPROTO_TCP, TCP_CORK, (char *) &w->tcp_cork, sizeof(int)) != 0)) {
  56                         error("%llu: failed to enable TCP_CORK on socket.", w->id);
  57                         w->tcp_cork = 0;
  58                         return -1;
  59                 }
  60         }
  61 #endif /* TCP_CORK */
  62
  63         return 0;
  64 }
  65
  66 inline int web_client_uncrock_socket(struct web_client *w) {
  67 #ifdef TCP_CORK
  68         if(likely(w->tcp_cork && w->ofd != -1)) {
  69                 w->tcp_cork = 0;
  70                 if(unlikely(setsockopt(w->ofd, IPPROTO_TCP, TCP_CORK, (char *) &w->tcp_cork, sizeof(int)) != 0)) {
  71                         error("%llu: failed to disable TCP_CORK on socket.", w->id);
  72                         w->tcp_cork = 1;
  73                         return -1;
  74                 }
  75         }
  76 #endif /* TCP_CORK */
  77
  78         return 0;
  79 }
  80
  81 struct web_client *web_client_create(int listener)
  82 {
  83         struct web_client *w;
  84
  85         w = calloc(1, sizeof(struct web_client));
  86         if(!w) {
  87                 error("Cannot allocate new web_client memory.");
  88                 return NULL;
  89         }
  90
  91         w->id = ++web_clients_count;
  92         w->mode = WEB_CLIENT_MODE_NORMAL;
  93
  94         {
  95                 struct sockaddr *sadr;
  96                 socklen_t addrlen;
  97
  98                 sadr = (struct sockaddr*) &w->clientaddr;
  99                 addrlen = sizeof(w->clientaddr);
 100
 101                 w->ifd = accept(listener, sadr, &addrlen);
 102                 if (w->ifd == -1) {
 103                         error("%llu: Cannot accept new incoming connection.", w->id);
 104                         free(w);
 105                         return NULL;
 106                 }
 107                 w->ofd = w->ifd;
 108
 109                 if(getnameinfo(sadr, addrlen, w->client_ip, NI_MAXHOST, w->client_port, NI_MAXSERV, NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
 110                         error("Cannot getnameinfo() on received client connection.");
 111                         strncpyz(w->client_ip,   "UNKNOWN", NI_MAXHOST);
 112                         strncpyz(w->client_port, "UNKNOWN", NI_MAXSERV);
 113                 }
 114                 w->client_ip[NI_MAXHOST]   = '\0';
 115                 w->client_port[NI_MAXSERV] = '\0';
 116
 117                 switch(sadr->sa_family) {
 118                 case AF_INET:
 119                         debug(D_WEB_CLIENT_ACCESS, "%llu: New IPv4 web client from %s port %s on socket %d.", w->id, w->client_ip, w->client_port, w->ifd);
 120                         break;
 121
 122                 case AF_INET6:
 123                         if(strncmp(w->client_ip, "::ffff:", 7) == 0) {
 124                                 strcpy(w->client_ip, &w->client_ip[7]);
 125                                 debug(D_WEB_CLIENT_ACCESS, "%llu: New IPv4 web client from %s port %s on socket %d.", w->id, w->client_ip, w->client_port, w->ifd);
 126                         }
 127                         else
 128                                 debug(D_WEB_CLIENT_ACCESS, "%llu: New IPv6 web client from %s port %s on socket %d.", w->id, w->client_ip, w->client_port, w->ifd);
 129                         break;
 130
 131                 default:
 132                         debug(D_WEB_CLIENT_ACCESS, "%llu: New UNKNOWN web client from %s port %s on socket %d.", w->id, w->client_ip, w->client_port, w->ifd);
 133                         break;
 134                 }
 135
 136                 int flag = 1;
 137                 if(setsockopt(w->ofd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int)) != 0)
 138                         error("%llu: failed to enable TCP_NODELAY on socket.", w->id);
 139
 140                 flag = 1;
 141                 if(setsockopt(w->ifd, SOL_SOCKET, SO_KEEPALIVE, (char *) &flag, sizeof(int)) != 0)
 142                         error("%llu: Cannot set SO_KEEPALIVE on socket.", w->id);
 143
 144
 145         }
 146
 147         w->response.data = buffer_create(INITIAL_WEB_DATA_LENGTH);
 148         if(unlikely(!w->response.data)) {
 149                 // no need for error log - web_buffer_create already logged the error
 150                 close(w->ifd);
 151                 free(w);
 152                 return NULL;
 153         }
 154
 155         w->response.header = buffer_create(HTTP_RESPONSE_HEADER_SIZE);
 156         if(unlikely(!w->response.header)) {
 157                 // no need for error log - web_buffer_create already logged the error
 158                 buffer_free(w->response.data);
 159                 close(w->ifd);
 160                 free(w);
 161                 return NULL;
 162         }
 163
 164         w->response.header_output = buffer_create(HTTP_RESPONSE_HEADER_SIZE);
 165         if(unlikely(!w->response.header_output)) {
 166                 // no need for error log - web_buffer_create already logged the error
 167                 buffer_free(w->response.header);
 168                 buffer_free(w->response.data);
 169                 close(w->ifd);
 170                 free(w);
 171                 return NULL;
 172         }
 173
 174         w->origin[0] = '*';
 175         w->wait_receive = 1;
 176
 177         if(web_clients) web_clients->prev = w;
 178         w->next = web_clients;
 179         web_clients = w;
 180
 181         global_statistics.connected_clients++;
 182
 183         return(w);
 184 }
 185
 186 void web_client_reset(struct web_client *w) {
 187         web_client_uncrock_socket(w);
 188
 189         debug(D_WEB_CLIENT, "%llu: Reseting client.", w->id);
 190
 191         if(likely(w->last_url[0])) {
 192                 struct timeval tv;
 193                 gettimeofday(&tv, NULL);
 194
 195                 size_t size = (w->mode == WEB_CLIENT_MODE_FILECOPY)?w->response.rlen:w->response.data->len;
 196                 size_t sent = size;
 197 #ifdef NETDATA_WITH_ZLIB
 198                 if(likely(w->response.zoutput)) sent = (size_t)w->response.zstream.total_out;
 199 #endif
 200
 201                 // --------------------------------------------------------------------
 202                 // global statistics
 203
 204                 if(web_server_mode == WEB_SERVER_MODE_MULTI_THREADED)
 205                         global_statistics_lock();
 206
 207                 global_statistics.web_requests++;
 208                 global_statistics.web_usec += usecdiff(&tv, &w->tv_in);
 209                 global_statistics.bytes_received += w->stats_received_bytes;
 210                 global_statistics.bytes_sent += w->stats_sent_bytes;
 211                 global_statistics.content_size += size;
 212                 global_statistics.compressed_content_size += sent;
 213
 214                 if(web_server_mode == WEB_SERVER_MODE_MULTI_THREADED)
 215                         global_statistics_unlock();
 216
 217                 w->stats_received_bytes = 0;
 218                 w->stats_sent_bytes = 0;
 219
 220
 221                 // --------------------------------------------------------------------
 222                 // access log
 223
 224                 log_access("%llu: (sent/all = %zu/%zu bytes %0.0f%%, prep/sent/total = %0.2f/%0.2f/%0.2f ms) %s: %d '%s'",
 225                                    w->id,
 226                                    sent, size, -((size > 0) ? ((float) (size - sent) / (float) size * 100.0) : 0.0),
 227                                    (float) usecdiff(&w->tv_ready, &w->tv_in) / 1000.0,
 228                                    (float) usecdiff(&tv, &w->tv_ready) / 1000.0,
 229                                    (float) usecdiff(&tv, &w->tv_in) / 1000.0,
 230                                    (w->mode == WEB_CLIENT_MODE_FILECOPY) ? "filecopy" : ((w->mode == WEB_CLIENT_MODE_OPTIONS)
 231                                                                                                                                                  ? "options" : "data"),
 232                                    w->response.code,
 233                                    w->last_url
 234                 );
 235         }
 236
 237         if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY)) {
 238                 if(w->ifd != w->ofd) {
 239                         debug(D_WEB_CLIENT, "%llu: Closing filecopy input file descriptor %d.", w->id, w->ifd);
 240                         if(w->ifd != -1) close(w->ifd);
 241                         w->ifd = w->ofd;
 242                 }
 243         }
 244
 245         w->last_url[0] = '\0';
 246         w->cookie1[0] = '\0';
 247         w->cookie2[0] = '\0';
 248         w->origin[0] = '*';
 249         w->origin[1] = '\0';
 250
 251         w->mode = WEB_CLIENT_MODE_NORMAL;
 252
 253         w->keepalive = 0;
 254         w->decoded_url[0] = '\0';
 255
 256         buffer_reset(w->response.header_output);
 257         buffer_reset(w->response.header);
 258         buffer_reset(w->response.data);
 259         w->response.rlen = 0;
 260         w->response.sent = 0;
 261         w->response.code = 0;
 262
 263         w->wait_receive = 1;
 264         w->wait_send = 0;
 265
 266         w->response.zoutput = 0;
 267
 268         // if we had enabled compression, release it
 269 #ifdef NETDATA_WITH_ZLIB
 270         if(w->response.zinitialized) {
 271                 debug(D_DEFLATE, "%llu: Freeing compression resources.", w->id);
 272                 deflateEnd(&w->response.zstream);
 273                 w->response.zsent = 0;
 274                 w->response.zhave = 0;
 275                 w->response.zstream.avail_in = 0;
 276                 w->response.zstream.avail_out = 0;
 277                 w->response.zstream.total_in = 0;
 278                 w->response.zstream.total_out = 0;
 279                 w->response.zinitialized = 0;
 280         }
 281 #endif // NETDATA_WITH_ZLIB
 282 }
 283
 284 struct web_client *web_client_free(struct web_client *w) {
 285         web_client_reset(w);
 286
 287         struct web_client *n = w->next;
 288         if(w == web_clients) web_clients = n;
 289
 290         debug(D_WEB_CLIENT_ACCESS, "%llu: Closing web client from %s port %s.", w->id, w->client_ip, w->client_port);
 291
 292         if(w->prev)     w->prev->next = w->next;
 293         if(w->next) w->next->prev = w->prev;
 294         if(w->response.header_output) buffer_free(w->response.header_output);
 295         if(w->response.header) buffer_free(w->response.header);
 296         if(w->response.data) buffer_free(w->response.data);
 297         if(w->ifd != -1) close(w->ifd);
 298         if(w->ofd != -1 && w->ofd != w->ifd) close(w->ofd);
 299         free(w);
 300
 301         global_statistics.connected_clients--;
 302
 303         return(n);
 304 }
 305
 306 uid_t web_files_uid(void) {
 307         static char *web_owner = NULL;
 308         static uid_t owner_uid = 0;
 309
 310         if(unlikely(!web_owner)) {
 311                 web_owner = config_get("global", "web files owner", config_get("global", "run as user", ""));
 312                 if(!web_owner || !*web_owner)
 313                         owner_uid = geteuid();
 314                 else {
 315                         // getpwnam() is not thread safe,
 316                         // but we have called this function once
 317                         // while single threaded
 318                         struct passwd *pw = getpwnam(web_owner);
 319                         if(!pw) {
 320                                 error("User '%s' is not present. Ignoring option.", web_owner);
 321                                 owner_uid = geteuid();
 322                         }
 323                         else {
 324                                 debug(D_WEB_CLIENT, "Web files owner set to %s.", web_owner);
 325                                 owner_uid = pw->pw_uid;
 326                         }
 327                 }
 328         }
 329
 330         return(owner_uid);
 331 }
 332
 333 gid_t web_files_gid(void) {
 334         static char *web_group = NULL;
 335         static gid_t owner_gid = 0;
 336
 337         if(unlikely(!web_group)) {
 338                 web_group = config_get("global", "web files group", config_get("global", "web files owner", ""));
 339                 if(!web_group || !*web_group)
 340                         owner_gid = getegid();
 341                 else {
 342                         // getgrnam() is not thread safe,
 343                         // but we have called this function once
 344                         // while single threaded
 345                         struct group *gr = getgrnam(web_group);
 346                         if(!gr) {
 347                                 error("Group '%s' is not present. Ignoring option.", web_group);
 348                                 owner_gid = getegid();
 349                         }
 350                         else {
 351                                 debug(D_WEB_CLIENT, "Web files group set to %s.", web_group);
 352                                 owner_gid = gr->gr_gid;
 353                         }
 354                 }
 355         }
 356
 357         return(owner_gid);
 358 }
 359
 360 int mysendfile(struct web_client *w, char *filename)
 361 {
 362         static char *web_dir = NULL;
 363
 364         // initialize our static data
 365         if(unlikely(!web_dir)) web_dir = config_get("global", "web files directory", WEB_DIR);
 366
 367         debug(D_WEB_CLIENT, "%llu: Looking for file '%s/%s'", w->id, web_dir, filename);
 368
 369         // skip leading slashes
 370         while (*filename == '/') filename++;
 371
 372         // if the filename contain known paths, skip them
 373         if(strncmp(filename, WEB_PATH_FILE "/", strlen(WEB_PATH_FILE) + 1) == 0) filename = &filename[strlen(WEB_PATH_FILE) + 1];
 374
 375         char *s;
 376         for(s = filename; *s ;s++) {
 377                 if( !isalnum(*s) && *s != '/' && *s != '.' && *s != '-' && *s != '_') {
 378                         debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not acceptable.", w->id, filename);
 379                         buffer_sprintf(w->response.data, "File '%s' cannot be served. Filename contains invalid character '%c'", filename, *s);
 380                         return 400;
 381                 }
 382         }
 383
 384         // if the filename contains a .. refuse to serve it
 385         if(strstr(filename, "..") != 0) {
 386                 debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not acceptable.", w->id, filename);
 387                 buffer_sprintf(w->response.data, "File '%s' cannot be served. Relative filenames with '..' in them are not supported.", filename);
 388                 return 400;
 389         }
 390
 391         // access the file
 392         char webfilename[FILENAME_MAX + 1];
 393         snprintfz(webfilename, FILENAME_MAX, "%s/%s", web_dir, filename);
 394
 395         // check if the file exists
 396         struct stat stat;
 397         if(lstat(webfilename, &stat) != 0) {
 398                 debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not found.", w->id, webfilename);
 399                 buffer_sprintf(w->response.data, "File '%s' does not exist, or is not accessible.", webfilename);
 400                 return 404;
 401         }
 402
 403         // check if the file is owned by expected user
 404         if(stat.st_uid != web_files_uid()) {
 405                 error("%llu: File '%s' is owned by user %d (expected user %d). Access Denied.", w->id, webfilename, stat.st_uid, web_files_uid());
 406                 buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", webfilename);
 407                 return 403;
 408         }
 409
 410         // check if the file is owned by expected group
 411         if(stat.st_gid != web_files_gid()) {
 412                 error("%llu: File '%s' is owned by group %d (expected group %d). Access Denied.", w->id, webfilename, stat.st_gid, web_files_gid());
 413                 buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", webfilename);
 414                 return 403;
 415         }
 416
 417         if((stat.st_mode & S_IFMT) == S_IFDIR) {
 418                 snprintfz(webfilename, FILENAME_MAX, "%s/index.html", filename);
 419                 return mysendfile(w, webfilename);
 420         }
 421
 422         if((stat.st_mode & S_IFMT) != S_IFREG) {
 423                 error("%llu: File '%s' is not a regular file. Access Denied.", w->id, webfilename);
 424                 buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", webfilename);
 425                 return 403;
 426         }
 427
 428         // open the file
 429         w->ifd = open(webfilename, O_NONBLOCK, O_RDONLY);
 430         if(w->ifd == -1) {
 431                 w->ifd = w->ofd;
 432
 433                 if(errno == EBUSY || errno == EAGAIN) {
 434                         error("%llu: File '%s' is busy, sending 307 Moved Temporarily to force retry.", w->id, webfilename);
 435                         buffer_sprintf(w->response.header, "Location: /" WEB_PATH_FILE "/%s\r\n", filename);
 436                         buffer_sprintf(w->response.data, "The file '%s' is currently busy. Please try again later.", webfilename);
 437                         return 307;
 438                 }
 439                 else {
 440                         error("%llu: Cannot open file '%s'.", w->id, webfilename);
 441                         buffer_sprintf(w->response.data, "Cannot open file '%s'.", webfilename);
 442                         return 404;
 443                 }
 444         }
 445
 446         // pick a Content-Type for the file
 447                  if(strstr(filename, ".html") != NULL)  w->response.data->contenttype = CT_TEXT_HTML;
 448         else if(strstr(filename, ".js")   != NULL)      w->response.data->contenttype = CT_APPLICATION_X_JAVASCRIPT;
 449         else if(strstr(filename, ".css")  != NULL)      w->response.data->contenttype = CT_TEXT_CSS;
 450         else if(strstr(filename, ".xml")  != NULL)      w->response.data->contenttype = CT_TEXT_XML;
 451         else if(strstr(filename, ".xsl")  != NULL)      w->response.data->contenttype = CT_TEXT_XSL;
 452         else if(strstr(filename, ".txt")  != NULL)  w->response.data->contenttype = CT_TEXT_PLAIN;
 453         else if(strstr(filename, ".svg")  != NULL)  w->response.data->contenttype = CT_IMAGE_SVG_XML;
 454         else if(strstr(filename, ".ttf")  != NULL)  w->response.data->contenttype = CT_APPLICATION_X_FONT_TRUETYPE;
 455         else if(strstr(filename, ".otf")  != NULL)  w->response.data->contenttype = CT_APPLICATION_X_FONT_OPENTYPE;
 456         else if(strstr(filename, ".woff2")!= NULL)  w->response.data->contenttype = CT_APPLICATION_FONT_WOFF2;
 457         else if(strstr(filename, ".woff") != NULL)  w->response.data->contenttype = CT_APPLICATION_FONT_WOFF;
 458         else if(strstr(filename, ".eot")  != NULL)  w->response.data->contenttype = CT_APPLICATION_VND_MS_FONTOBJ;
 459         else if(strstr(filename, ".png")  != NULL)  w->response.data->contenttype = CT_IMAGE_PNG;
 460         else if(strstr(filename, ".jpg")  != NULL)  w->response.data->contenttype = CT_IMAGE_JPG;
 461         else if(strstr(filename, ".jpeg") != NULL)  w->response.data->contenttype = CT_IMAGE_JPG;
 462         else if(strstr(filename, ".gif")  != NULL)  w->response.data->contenttype = CT_IMAGE_GIF;
 463         else if(strstr(filename, ".bmp")  != NULL)  w->response.data->contenttype = CT_IMAGE_BMP;
 464         else if(strstr(filename, ".ico")  != NULL)  w->response.data->contenttype = CT_IMAGE_XICON;
 465         else if(strstr(filename, ".icns") != NULL)  w->response.data->contenttype = CT_IMAGE_ICNS;
 466         else w->response.data->contenttype = CT_APPLICATION_OCTET_STREAM;
 467
 468         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending file '%s' (%ld bytes, ifd %d, ofd %d).", w->id, webfilename, stat.st_size, w->ifd, w->ofd);
 469
 470         w->mode = WEB_CLIENT_MODE_FILECOPY;
 471         w->wait_receive = 1;
 472         w->wait_send = 0;
 473         buffer_flush(w->response.data);
 474         w->response.rlen = stat.st_size;
 475         w->response.data->date = stat.st_mtim.tv_sec;
 476
 477         return 200;
 478 }
 479
 480
 481 #ifdef NETDATA_WITH_ZLIB
 482 void web_client_enable_deflate(struct web_client *w, int gzip) {
 483         if(unlikely(w->response.zinitialized)) {
 484                 error("%llu: Compression has already be initialized for this client.", w->id);
 485                 return;
 486         }
 487
 488         if(unlikely(w->response.sent)) {
 489                 error("%llu: Cannot enable compression in the middle of a conversation.", w->id);
 490                 return;
 491         }
 492
 493         w->response.zstream.zalloc = Z_NULL;
 494         w->response.zstream.zfree = Z_NULL;
 495         w->response.zstream.opaque = Z_NULL;
 496
 497         w->response.zstream.next_in = (Bytef *)w->response.data->buffer;
 498         w->response.zstream.avail_in = 0;
 499         w->response.zstream.total_in = 0;
 500
 501         w->response.zstream.next_out = w->response.zbuffer;
 502         w->response.zstream.avail_out = 0;
 503         w->response.zstream.total_out = 0;
 504
 505         w->response.zstream.zalloc = Z_NULL;
 506         w->response.zstream.zfree = Z_NULL;
 507         w->response.zstream.opaque = Z_NULL;
 508
 509 //      if(deflateInit(&w->response.zstream, Z_DEFAULT_COMPRESSION) != Z_OK) {
 510 //              error("%llu: Failed to initialize zlib. Proceeding without compression.", w->id);
 511 //              return;
 512 //      }
 513
 514         // Select GZIP compression: windowbits = 15 + 16 = 31
 515         if(deflateInit2(&w->response.zstream, web_gzip_level, Z_DEFLATED, 15 + ((gzip)?16:0), 8, web_gzip_strategy) != Z_OK) {
 516                 error("%llu: Failed to initialize zlib. Proceeding without compression.", w->id);
 517                 return;
 518         }
 519
 520         w->response.zsent = 0;
 521         w->response.zoutput = 1;
 522         w->response.zinitialized = 1;
 523
 524         debug(D_DEFLATE, "%llu: Initialized compression.", w->id);
 525 }
 526 #endif // NETDATA_WITH_ZLIB
 527
 528 uint32_t web_client_api_request_v1_data_options(char *o)
 529 {
 530         uint32_t ret = 0x00000000;
 531         char *tok;
 532
 533         while(o && *o && (tok = mystrsep(&o, ", |"))) {
 534                 if(!*tok) continue;
 535
 536                 if(!strcmp(tok, "nonzero"))
 537                         ret |= RRDR_OPTION_NONZERO;
 538                 else if(!strcmp(tok, "flip") || !strcmp(tok, "reversed") || !strcmp(tok, "reverse"))
 539                         ret |= RRDR_OPTION_REVERSED;
 540                 else if(!strcmp(tok, "jsonwrap"))
 541                         ret |= RRDR_OPTION_JSON_WRAP;
 542                 else if(!strcmp(tok, "min2max"))
 543                         ret |= RRDR_OPTION_MIN2MAX;
 544                 else if(!strcmp(tok, "ms") || !strcmp(tok, "milliseconds"))
 545                         ret |= RRDR_OPTION_MILLISECONDS;
 546                 else if(!strcmp(tok, "abs") || !strcmp(tok, "absolute") || !strcmp(tok, "absolute_sum") || !strcmp(tok, "absolute-sum"))
 547                         ret |= RRDR_OPTION_ABSOLUTE;
 548                 else if(!strcmp(tok, "seconds"))
 549                         ret |= RRDR_OPTION_SECONDS;
 550                 else if(!strcmp(tok, "null2zero"))
 551                         ret |= RRDR_OPTION_NULL2ZERO;
 552                 else if(!strcmp(tok, "objectrows"))
 553                         ret |= RRDR_OPTION_OBJECTSROWS;
 554                 else if(!strcmp(tok, "google_json"))
 555                         ret |= RRDR_OPTION_GOOGLE_JSON;
 556                 else if(!strcmp(tok, "percentage"))
 557                         ret |= RRDR_OPTION_PERCENTAGE;
 558         }
 559
 560         return ret;
 561 }
 562
 563 uint32_t web_client_api_request_v1_data_format(char *name)
 564 {
 565         if(!strcmp(name, DATASOURCE_FORMAT_DATATABLE_JSON)) // datatable
 566                 return DATASOURCE_DATATABLE_JSON;
 567
 568         else if(!strcmp(name, DATASOURCE_FORMAT_DATATABLE_JSONP)) // datasource
 569                 return DATASOURCE_DATATABLE_JSONP;
 570
 571         else if(!strcmp(name, DATASOURCE_FORMAT_JSON)) // json
 572                 return DATASOURCE_JSON;
 573
 574         else if(!strcmp(name, DATASOURCE_FORMAT_JSONP)) // jsonp
 575                 return DATASOURCE_JSONP;
 576
 577         else if(!strcmp(name, DATASOURCE_FORMAT_SSV)) // ssv
 578                 return DATASOURCE_SSV;
 579
 580         else if(!strcmp(name, DATASOURCE_FORMAT_CSV)) // csv
 581                 return DATASOURCE_CSV;
 582
 583         else if(!strcmp(name, DATASOURCE_FORMAT_TSV) || !strcmp(name, "tsv-excel")) // tsv
 584                 return DATASOURCE_TSV;
 585
 586         else if(!strcmp(name, DATASOURCE_FORMAT_HTML)) // html
 587                 return DATASOURCE_HTML;
 588
 589         else if(!strcmp(name, DATASOURCE_FORMAT_JS_ARRAY)) // array
 590                 return DATASOURCE_JS_ARRAY;
 591
 592         else if(!strcmp(name, DATASOURCE_FORMAT_SSV_COMMA)) // ssvcomma
 593                 return DATASOURCE_SSV_COMMA;
 594
 595         else if(!strcmp(name, DATASOURCE_FORMAT_CSV_JSON_ARRAY)) // csvjsonarray
 596                 return DATASOURCE_CSV_JSON_ARRAY;
 597
 598         return DATASOURCE_JSON;
 599 }
 600
 601 uint32_t web_client_api_request_v1_data_google_format(char *name)
 602 {
 603         if(!strcmp(name, "json"))
 604                 return DATASOURCE_DATATABLE_JSONP;
 605
 606         else if(!strcmp(name, "html"))
 607                 return DATASOURCE_HTML;
 608
 609         else if(!strcmp(name, "csv"))
 610                 return DATASOURCE_CSV;
 611
 612         else if(!strcmp(name, "tsv-excel"))
 613                 return DATASOURCE_TSV;
 614
 615         return DATASOURCE_JSON;
 616 }
 617
 618 int web_client_api_request_v1_data_group(char *name)
 619 {
 620         if(!strcmp(name, "max"))
 621                 return GROUP_MAX;
 622
 623         else if(!strcmp(name, "average"))
 624                 return GROUP_AVERAGE;
 625
 626         return GROUP_MAX;
 627 }
 628
 629 int web_client_api_request_v1_charts(struct web_client *w, char *url)
 630 {
 631         if(url) { ; }
 632
 633         buffer_flush(w->response.data);
 634         w->response.data->contenttype = CT_APPLICATION_JSON;
 635         rrd_stats_api_v1_charts(w->response.data);
 636         return 200;
 637 }
 638
 639 int web_client_api_request_v1_chart(struct web_client *w, char *url)
 640 {
 641         int ret = 400;
 642         char *chart = NULL;
 643
 644         buffer_flush(w->response.data);
 645
 646         while(url) {
 647                 char *value = mystrsep(&url, "?&[]");
 648                 if(!value || !*value) continue;
 649
 650                 char *name = mystrsep(&value, "=");
 651                 if(!name || !*name) continue;
 652                 if(!value || !*value) continue;
 653
 654                 // name and value are now the parameters
 655                 // they are not null and not empty
 656
 657                 if(!strcmp(name, "chart")) chart = value;
 658                 //else {
 659                 ///     buffer_sprintf(w->response.data, "Unknown parameter '%s' in request.", name);
 660                 //      goto cleanup;
 661                 //}
 662         }
 663
 664         if(!chart || !*chart) {
 665                 buffer_sprintf(w->response.data, "No chart id is given at the request.");
 666                 goto cleanup;
 667         }
 668
 669         RRDSET *st = rrdset_find(chart);
 670         if(!st) st = rrdset_find_byname(chart);
 671         if(!st) {
 672                 buffer_sprintf(w->response.data, "Chart '%s' is not found.", chart);
 673                 ret = 404;
 674                 goto cleanup;
 675         }
 676
 677         w->response.data->contenttype = CT_APPLICATION_JSON;
 678         rrd_stats_api_v1_chart(st, w->response.data);
 679         return 200;
 680
 681 cleanup:
 682         return ret;
 683 }
 684
 685 // returns the HTTP code
 686 int web_client_api_request_v1_data(struct web_client *w, char *url)
 687 {
 688         debug(D_WEB_CLIENT, "%llu: API v1 data with URL '%s'", w->id, url);
 689
 690         int ret = 400;
 691         BUFFER *dimensions = NULL;
 692
 693         buffer_flush(w->response.data);
 694
 695         char    *google_version = "0.6",
 696                         *google_reqId = "0",
 697                         *google_sig = "0",
 698                         *google_out = "json",
 699                         *responseHandler = NULL,
 700                         *outFileName = NULL;
 701
 702         time_t last_timestamp_in_data = 0, google_timestamp = 0;
 703
 704         char *chart = NULL
 705                         , *before_str = NULL
 706                         , *after_str = NULL
 707                         , *points_str = NULL;
 708
 709         int group = GROUP_MAX;
 710         uint32_t format = DATASOURCE_JSON;
 711         uint32_t options = 0x00000000;
 712
 713         while(url) {
 714                 char *value = mystrsep(&url, "?&[]");
 715                 if(!value || !*value) continue;
 716
 717                 char *name = mystrsep(&value, "=");
 718                 if(!name || !*name) continue;
 719                 if(!value || !*value) continue;
 720
 721                 debug(D_WEB_CLIENT, "%llu: API v1 data query param '%s' with value '%s'", w->id, name, value);
 722
 723                 // name and value are now the parameters
 724                 // they are not null and not empty
 725
 726                 if(!strcmp(name, "chart")) chart = value;
 727                 else if(!strcmp(name, "dimension") || !strcmp(name, "dim") || !strcmp(name, "dimensions") || !strcmp(name, "dims")) {
 728                         if(!dimensions) dimensions = buffer_create(strlen(value));
 729                         if(dimensions) {
 730                                 buffer_strcat(dimensions, "|");
 731                                 buffer_strcat(dimensions, value);
 732                         }
 733                 }
 734                 else if(!strcmp(name, "after")) after_str = value;
 735                 else if(!strcmp(name, "before")) before_str = value;
 736                 else if(!strcmp(name, "points")) points_str = value;
 737                 else if(!strcmp(name, "group")) {
 738                         group = web_client_api_request_v1_data_group(value);
 739                 }
 740                 else if(!strcmp(name, "format")) {
 741                         format = web_client_api_request_v1_data_format(value);
 742                 }
 743                 else if(!strcmp(name, "options")) {
 744                         options |= web_client_api_request_v1_data_options(value);
 745                 }
 746                 else if(!strcmp(name, "callback")) {
 747                         responseHandler = value;
 748                 }
 749                 else if(!strcmp(name, "filename")) {
 750                         outFileName = value;
 751                 }
 752                 else if(!strcmp(name, "tqx")) {
 753                         // parse Google Visualization API options
 754                         // https://developers.google.com/chart/interactive/docs/dev/implementing_data_source
 755                         char *tqx_name, *tqx_value;
 756
 757                         while(value) {
 758                                 tqx_value = mystrsep(&value, ";");
 759                                 if(!tqx_value || !*tqx_value) continue;
 760
 761                                 tqx_name = mystrsep(&tqx_value, ":");
 762                                 if(!tqx_name || !*tqx_name) continue;
 763                                 if(!tqx_value || !*tqx_value) continue;
 764
 765                                 if(!strcmp(tqx_name, "version"))
 766                                         google_version = tqx_value;
 767                                 else if(!strcmp(tqx_name, "reqId"))
 768                                         google_reqId = tqx_value;
 769                                 else if(!strcmp(tqx_name, "sig")) {
 770                                         google_sig = tqx_value;
 771                                         google_timestamp = strtoul(google_sig, NULL, 0);
 772                                 }
 773                                 else if(!strcmp(tqx_name, "out")) {
 774                                         google_out = tqx_value;
 775                                         format = web_client_api_request_v1_data_google_format(google_out);
 776                                 }
 777                                 else if(!strcmp(tqx_name, "responseHandler"))
 778                                         responseHandler = tqx_value;
 779                                 else if(!strcmp(tqx_name, "outFileName"))
 780                                         outFileName = tqx_value;
 781                         }
 782                 }
 783         }
 784
 785         if(!chart || !*chart) {
 786                 buffer_sprintf(w->response.data, "No chart id is given at the request.");
 787                 goto cleanup;
 788         }
 789
 790         RRDSET *st = rrdset_find(chart);
 791         if(!st) st = rrdset_find_byname(chart);
 792         if(!st) {
 793                 buffer_sprintf(w->response.data, "Chart '%s' is not found.", chart);
 794                 ret = 404;
 795                 goto cleanup;
 796         }
 797
 798         long long before = (before_str && *before_str)?atol(before_str):0;
 799         long long after  = (after_str  && *after_str) ?atol(after_str):0;
 800         int       points = (points_str && *points_str)?atoi(points_str):0;
 801
 802         debug(D_WEB_CLIENT, "%llu: API command 'data' for chart '%s', dimensions '%s', after '%lld', before '%lld', points '%d', group '%u', format '%u', options '0x%08x'"
 803                         , w->id
 804                         , chart
 805                         , (dimensions)?buffer_tostring(dimensions):""
 806                         , after
 807                         , before
 808                         , points
 809                         , group
 810                         , format
 811                         , options
 812                         );
 813
 814         if(outFileName && *outFileName) {
 815                 buffer_sprintf(w->response.header, "Content-Disposition: attachment; filename=\"%s\"\r\n", outFileName);
 816                 debug(D_WEB_CLIENT, "%llu: generating outfilename header: '%s'", w->id, outFileName);
 817         }
 818
 819         if(format == DATASOURCE_DATATABLE_JSONP) {
 820                 if(responseHandler == NULL)
 821                         responseHandler = "google.visualization.Query.setResponse";
 822
 823                 debug(D_WEB_CLIENT_ACCESS, "%llu: GOOGLE JSON/JSONP: version = '%s', reqId = '%s', sig = '%s', out = '%s', responseHandler = '%s', outFileName = '%s'",
 824                                 w->id, google_version, google_reqId, google_sig, google_out, responseHandler, outFileName
 825                         );
 826
 827                 buffer_sprintf(w->response.data,
 828                         "%s({version:'%s',reqId:'%s',status:'ok',sig:'%lu',table:",
 829                         responseHandler, google_version, google_reqId, st->last_updated.tv_sec);
 830         }
 831         else if(format == DATASOURCE_JSONP) {
 832                 if(responseHandler == NULL)
 833                         responseHandler = "callback";
 834
 835                 buffer_strcat(w->response.data, responseHandler);
 836                 buffer_strcat(w->response.data, "(");
 837         }
 838
 839         ret = rrd2format(st, w->response.data, dimensions, format, points, after, before, group, options, &last_timestamp_in_data);
 840
 841         if(format == DATASOURCE_DATATABLE_JSONP) {
 842                 if(google_timestamp < last_timestamp_in_data)
 843                         buffer_strcat(w->response.data, "});");
 844
 845                 else {
 846                         // the client already has the latest data
 847                         buffer_flush(w->response.data);
 848                         buffer_sprintf(w->response.data,
 849                                 "%s({version:'%s',reqId:'%s',status:'error',errors:[{reason:'not_modified',message:'Data not modified'}]});",
 850                                 responseHandler, google_version, google_reqId);
 851                 }
 852         }
 853         else if(format == DATASOURCE_JSONP)
 854                 buffer_strcat(w->response.data, ");");
 855
 856 cleanup:
 857         if(dimensions) buffer_free(dimensions);
 858         return ret;
 859 }
 860
 861 int web_client_api_request_v1_registry(struct web_client *w, char *url)
 862 {
 863         static uint32_t hash_action = 0, hash_access = 0, hash_hello = 0, hash_delete = 0, hash_search = 0,
 864                         hash_switch = 0, hash_machine = 0, hash_url = 0, hash_name = 0, hash_delete_url = 0, hash_for = 0,
 865                         hash_to = 0, hash_redirects = 0;
 866
 867         if(unlikely(!hash_action)) {
 868                 hash_action = simple_hash("action");
 869                 hash_access = simple_hash("access");
 870                 hash_hello = simple_hash("hello");
 871                 hash_delete = simple_hash("delete");
 872                 hash_search = simple_hash("search");
 873                 hash_switch = simple_hash("switch");
 874                 hash_machine = simple_hash("machine");
 875                 hash_url = simple_hash("url");
 876                 hash_name = simple_hash("name");
 877                 hash_delete_url = simple_hash("delete_url");
 878                 hash_for = simple_hash("for");
 879                 hash_to = simple_hash("to");
 880                 hash_redirects = simple_hash("redirects");
 881         }
 882
 883         char person_guid[36 + 1] = "";
 884
 885         debug(D_WEB_CLIENT, "%llu: API v1 registry with URL '%s'", w->id, url);
 886
 887         // FIXME
 888         // The browser may send multiple cookies with our id
 889
 890         char *cookie = strstr(w->response.data->buffer, NETDATA_REGISTRY_COOKIE_NAME "=");
 891         if(cookie)
 892                 strncpyz(person_guid, &cookie[sizeof(NETDATA_REGISTRY_COOKIE_NAME)], 36);
 893
 894         char action = '\0';
 895         char *machine_guid = NULL,
 896                         *machine_url = NULL,
 897                         *url_name = NULL,
 898                         *search_machine_guid = NULL,
 899                         *delete_url = NULL,
 900                         *to_person_guid = NULL;
 901         int redirects = 0;
 902
 903         while(url) {
 904                 char *value = mystrsep(&url, "?&[]");
 905                 if (!value || !*value) continue;
 906
 907                 char *name = mystrsep(&value, "=");
 908                 if (!name || !*name) continue;
 909                 if (!value || !*value) continue;
 910
 911                 debug(D_WEB_CLIENT, "%llu: API v1 registry query param '%s' with value '%s'", w->id, name, value);
 912
 913                 uint32_t hash = simple_hash(name);
 914
 915                 if(hash == hash_action && !strcmp(name, "action")) {
 916                         uint32_t vhash = simple_hash(value);
 917
 918                         if(vhash == hash_access && !strcmp(value, "access")) action = 'A';
 919                         else if(vhash == hash_hello && !strcmp(value, "hello")) action = 'H';
 920                         else if(vhash == hash_delete && !strcmp(value, "delete")) action = 'D';
 921                         else if(vhash == hash_search && !strcmp(value, "search")) action = 'S';
 922                         else if(vhash == hash_switch && !strcmp(value, "switch")) action = 'W';
 923 #ifdef NETDATA_INTERNAL_CHECKS
 924             else error("unknown registry action '%s'", value);
 925 #endif /* NETDATA_INTERNAL_CHECKS */
 926                 }
 927                 else if(hash == hash_redirects && !strcmp(name, "redirects"))
 928                         redirects = atoi(value);
 929
 930                 else if(hash == hash_machine && !strcmp(name, "machine"))
 931                         machine_guid = value;
 932
 933                 else if(hash == hash_url && !strcmp(name, "url"))
 934                         machine_url = value;
 935
 936                 else if(action == 'A') {
 937                         if(hash == hash_name && !strcmp(name, "name"))
 938                                 url_name = value;
 939                 }
 940                 else if(action == 'D') {
 941                         if(hash == hash_delete_url && !strcmp(name, "delete_url"))
 942                                 delete_url = value;
 943                 }
 944                 else if(action == 'S') {
 945                         if(hash == hash_for && !strcmp(name, "for"))
 946                                 search_machine_guid = value;
 947                 }
 948                 else if(action == 'W') {
 949                         if(hash == hash_to && !strcmp(name, "to"))
 950                                 to_person_guid = value;
 951                 }
 952 #ifdef NETDATA_INTERNAL_CHECKS
 953                 else error("unused registry URL parameter '%s' with value '%s'", name, value);
 954 #endif /* NETDATA_INTERNAL_CHECKS */
 955         }
 956
 957         if(action == 'A' && (!machine_guid || !machine_url || !url_name)) {
 958                 buffer_flush(w->response.data);
 959                 buffer_sprintf(w->response.data, "Invalid registry request - access requires these parameters: machine ('%s'), url ('%s'), name ('%s')",
 960                                            machine_guid?machine_guid:"UNSET", machine_url?machine_url:"UNSET", url_name?url_name:"UNSET");
 961                 return 400;
 962         }
 963         else if(action == 'D' && (!machine_guid || !machine_url || !delete_url)) {
 964                 buffer_flush(w->response.data);
 965                 buffer_sprintf(w->response.data, "Invalid registry request - delete requires these parameters: machine ('%s'), url ('%s'), delete_url ('%s')",
 966                                            machine_guid?machine_guid:"UNSET", machine_url?machine_url:"UNSET", delete_url?delete_url:"UNSET");
 967                 return 400;
 968         }
 969         else if(action == 'S' && (!machine_guid || !machine_url || !search_machine_guid)) {
 970                 buffer_flush(w->response.data);
 971                 buffer_sprintf(w->response.data, "Invalid registry request - search requires these parameters: machine ('%s'), url ('%s'), for ('%s')",
 972                                            machine_guid?machine_guid:"UNSET", machine_url?machine_url:"UNSET", search_machine_guid?search_machine_guid:"UNSET");
 973                 return 400;
 974         }
 975         else if(action == 'W' && (!machine_guid || !machine_url || !to_person_guid)) {
 976                 buffer_flush(w->response.data);
 977                 buffer_sprintf(w->response.data, "Invalid registry request - switching identity requires these parameters: machine ('%s'), url ('%s'), to ('%s')",
 978                                            machine_guid?machine_guid:"UNSET", machine_url?machine_url:"UNSET", to_person_guid?to_person_guid:"UNSET");
 979                 return 400;
 980         }
 981
 982         switch(action) {
 983                 case 'A':
 984                         if(registry_verify_cookies_redirects() > 0 && (!cookie || !person_guid[0])) {
 985                                 buffer_flush(w->response.data);
 986
 987                                 if(redirects > registry_verify_cookies_redirects()) {
 988                                         buffer_sprintf(w->response.data, "Your browser does not support cookies");
 989                                         return 400;
 990                                 }
 991
 992                                 redirects++;
 993
 994                                 registry_set_cookie(w, "give-me-back-this-cookie-please");
 995                                 w->response.data->contenttype = CT_APPLICATION_JSON;
 996                                 buffer_sprintf(w->response.data, "{ \"status\": \"redirect\", \"registry\": \"%s\" }", registry_to_announce());
 997
 998 /*
 999                                 char *encoded_url = url_encode(machine_url);
1000                                 if(!encoded_url) {
1001                                         error("%llu: Cannot URL encode string '%s'", w->id, machine_url);
1002                                         return 500;
1003                                 }
1004
1005                                 char *encoded_name = url_encode(url_name);
1006                                 if(!encoded_name) {
1007                                         free(encoded_url);
1008                                         error("%llu: Cannot URL encode string '%s'", w->id, url_name);
1009                                         return 500;
1010                                 }
1011
1012                                 char *encoded_guid = url_encode(machine_guid);
1013                                 if(!encoded_guid) {
1014                                         free(encoded_url);
1015                                         free(encoded_name);
1016                                         error("%llu: Cannot URL encode string '%s'", w->id, machine_guid);
1017                                         return 500;
1018                                 }
1019
1020                                 buffer_sprintf(w->response.header, "Location: %s/api/v1/registry?action=access&machine=%s&name=%s&url=%s&redirects=%d\r\n",
1021                                                            registry_to_announce(), encoded_guid, encoded_name, encoded_url, redirects);
1022
1023                                 free(encoded_guid);
1024                                 free(encoded_name);
1025                                 free(encoded_url);
1026 */
1027                                 return 200;
1028                         }
1029                         return registry_request_access_json(w, person_guid, machine_guid, machine_url, url_name, time(NULL));
1030
1031                 case 'D':
1032                         return registry_request_delete_json(w, person_guid, machine_guid, machine_url, delete_url, time(NULL));
1033
1034                 case 'S':
1035                         return registry_request_search_json(w, person_guid, machine_guid, machine_url, search_machine_guid, time(NULL));
1036
1037                 case 'W':
1038                         return registry_request_switch_json(w, person_guid, machine_guid, machine_url, to_person_guid, time(NULL));
1039
1040                 case 'H':
1041                         return registry_request_hello_json(w);
1042
1043                 default:
1044                         buffer_flush(w->response.data);
1045                         buffer_sprintf(w->response.data, "Invalid registry request - you need to set an action: hello, access, delete, search");
1046                         return 400;
1047         }
1048
1049         buffer_flush(w->response.data);
1050         buffer_sprintf(w->response.data, "Invalid or no registry action.");
1051         return 400;
1052 }
1053
1054 int web_client_api_request_v1(struct web_client *w, char *url)
1055 {
1056         static uint32_t hash_data = 0, hash_chart = 0, hash_charts = 0, hash_registry = 0;
1057
1058         if(unlikely(hash_data == 0)) {
1059                 hash_data = simple_hash("data");
1060                 hash_chart = simple_hash("chart");
1061                 hash_charts = simple_hash("charts");
1062                 hash_registry = simple_hash("registry");
1063         }
1064
1065         // get the command
1066         char *tok = mystrsep(&url, "/?&");
1067         if(tok && *tok) {
1068                 debug(D_WEB_CLIENT, "%llu: Searching for API v1 command '%s'.", w->id, tok);
1069                 uint32_t hash = simple_hash(tok);
1070
1071                 if(hash == hash_data && !strcmp(tok, "data"))
1072                         return web_client_api_request_v1_data(w, url);
1073
1074                 else if(hash == hash_chart && !strcmp(tok, "chart"))
1075                         return web_client_api_request_v1_chart(w, url);
1076
1077                 else if(hash == hash_charts && !strcmp(tok, "charts"))
1078                         return web_client_api_request_v1_charts(w, url);
1079
1080                 else if(hash == hash_registry && !strcmp(tok, "registry"))
1081                         return web_client_api_request_v1_registry(w, url);
1082
1083                 else {
1084                         buffer_flush(w->response.data);
1085                         buffer_sprintf(w->response.data, "Unsupported v1 API command: %s", tok);
1086                         return 404;
1087                 }
1088         }
1089         else {
1090                 buffer_flush(w->response.data);
1091                 buffer_sprintf(w->response.data, "API v1 command?");
1092                 return 400;
1093         }
1094 }
1095
1096 int web_client_api_request(struct web_client *w, char *url)
1097 {
1098         // get the api version
1099         char *tok = mystrsep(&url, "/?&");
1100         if(tok && *tok) {
1101                 debug(D_WEB_CLIENT, "%llu: Searching for API version '%s'.", w->id, tok);
1102                 if(strcmp(tok, "v1") == 0)
1103                         return web_client_api_request_v1(w, url);
1104                 else {
1105                         buffer_flush(w->response.data);
1106                         buffer_sprintf(w->response.data, "Unsupported API version: %s", tok);
1107                         return 404;
1108                 }
1109         }
1110         else {
1111                 buffer_flush(w->response.data);
1112                 buffer_sprintf(w->response.data, "Which API version?");
1113                 return 400;
1114         }
1115 }
1116
1117 int web_client_api_old_data_request(struct web_client *w, char *url, int datasource_type)
1118 {
1119         RRDSET *st = NULL;
1120
1121         char *args = strchr(url, '?');
1122         if(args) {
1123                 *args='\0';
1124                 args = &args[1];
1125         }
1126
1127         // get the name of the data to show
1128         char *tok = mystrsep(&url, "/");
1129
1130         // do we have such a data set?
1131         if(tok && *tok) {
1132                 debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
1133                 st = rrdset_find_byname(tok);
1134                 if(!st) st = rrdset_find(tok);
1135         }
1136
1137         if(!st) {
1138                 // we don't have it
1139                 // try to send a file with that name
1140                 buffer_flush(w->response.data);
1141                 return(mysendfile(w, tok));
1142         }
1143
1144         // we have it
1145         debug(D_WEB_CLIENT, "%llu: Found RRD data with name '%s'.", w->id, tok);
1146
1147         // how many entries does the client want?
1148         long lines = rrd_default_history_entries;
1149         long group_count = 1;
1150         time_t after = 0, before = 0;
1151         int group_method = GROUP_AVERAGE;
1152         int nonzero = 0;
1153
1154         if(url) {
1155                 // parse the lines required
1156                 tok = mystrsep(&url, "/");
1157                 if(tok) lines = atoi(tok);
1158                 if(lines < 1) lines = 1;
1159         }
1160         if(url) {
1161                 // parse the group count required
1162                 tok = mystrsep(&url, "/");
1163                 if(tok && *tok) group_count = atoi(tok);
1164                 if(group_count < 1) group_count = 1;
1165                 //if(group_count > save_history / 20) group_count = save_history / 20;
1166         }
1167         if(url) {
1168                 // parse the grouping method required
1169                 tok = mystrsep(&url, "/");
1170                 if(tok && *tok) {
1171                         if(strcmp(tok, "max") == 0) group_method = GROUP_MAX;
1172                         else if(strcmp(tok, "average") == 0) group_method = GROUP_AVERAGE;
1173                         else if(strcmp(tok, "sum") == 0) group_method = GROUP_SUM;
1174                         else debug(D_WEB_CLIENT, "%llu: Unknown group method '%s'", w->id, tok);
1175                 }
1176         }
1177         if(url) {
1178                 // parse after time
1179                 tok = mystrsep(&url, "/");
1180                 if(tok && *tok) after = strtoul(tok, NULL, 10);
1181                 if(after < 0) after = 0;
1182         }
1183         if(url) {
1184                 // parse before time
1185                 tok = mystrsep(&url, "/");
1186                 if(tok && *tok) before = strtoul(tok, NULL, 10);
1187                 if(before < 0) before = 0;
1188         }
1189         if(url) {
1190                 // parse nonzero
1191                 tok = mystrsep(&url, "/");
1192                 if(tok && *tok && strcmp(tok, "nonzero") == 0) nonzero = 1;
1193         }
1194
1195         w->response.data->contenttype = CT_APPLICATION_JSON;
1196         buffer_flush(w->response.data);
1197
1198         char *google_version = "0.6";
1199         char *google_reqId = "0";
1200         char *google_sig = "0";
1201         char *google_out = "json";
1202         char *google_responseHandler = "google.visualization.Query.setResponse";
1203         char *google_outFileName = NULL;
1204         time_t last_timestamp_in_data = 0;
1205         if(datasource_type == DATASOURCE_DATATABLE_JSON || datasource_type == DATASOURCE_DATATABLE_JSONP) {
1206
1207                 w->response.data->contenttype = CT_APPLICATION_X_JAVASCRIPT;
1208
1209                 while(args) {
1210                         tok = mystrsep(&args, "&");
1211                         if(tok && *tok) {
1212                                 char *name = mystrsep(&tok, "=");
1213                                 if(name && *name && strcmp(name, "tqx") == 0) {
1214                                         char *key = mystrsep(&tok, ":");
1215                                         char *value = mystrsep(&tok, ";");
1216                                         if(key && value && *key && *value) {
1217                                                 if(strcmp(key, "version") == 0)
1218                                                         google_version = value;
1219
1220                                                 else if(strcmp(key, "reqId") == 0)
1221                                                         google_reqId = value;
1222
1223                                                 else if(strcmp(key, "sig") == 0)
1224                                                         google_sig = value;
1225
1226                                                 else if(strcmp(key, "out") == 0)
1227                                                         google_out = value;
1228
1229                                                 else if(strcmp(key, "responseHandler") == 0)
1230                                                         google_responseHandler = value;
1231
1232                                                 else if(strcmp(key, "outFileName") == 0)
1233                                                         google_outFileName = value;
1234                                         }
1235                                 }
1236                         }
1237                 }
1238
1239                 debug(D_WEB_CLIENT_ACCESS, "%llu: GOOGLE JSONP: version = '%s', reqId = '%s', sig = '%s', out = '%s', responseHandler = '%s', outFileName = '%s'",
1240                         w->id, google_version, google_reqId, google_sig, google_out, google_responseHandler, google_outFileName
1241                         );
1242
1243                 if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
1244                         last_timestamp_in_data = strtoul(google_sig, NULL, 0);
1245
1246                         // check the client wants json
1247                         if(strcmp(google_out, "json") != 0) {
1248                                 buffer_sprintf(w->response.data,
1249                                         "%s({version:'%s',reqId:'%s',status:'error',errors:[{reason:'invalid_query',message:'output format is not supported',detailed_message:'the format %s requested is not supported by netdata.'}]});",
1250                                         google_responseHandler, google_version, google_reqId, google_out);
1251                                         return 200;
1252                         }
1253                 }
1254         }
1255
1256         if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
1257                 buffer_sprintf(w->response.data,
1258                         "%s({version:'%s',reqId:'%s',status:'ok',sig:'%lu',table:",
1259                         google_responseHandler, google_version, google_reqId, st->last_updated.tv_sec);
1260         }
1261
1262         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending RRD data '%s' (id %s, %d lines, %d group, %d group_method, %lu after, %lu before).", w->id, st->name, st->id, lines, group_count, group_method, after, before);
1263         time_t timestamp_in_data = rrd_stats_json(datasource_type, st, w->response.data, lines, group_count, group_method, after, before, nonzero);
1264
1265         if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
1266                 if(timestamp_in_data > last_timestamp_in_data)
1267                         buffer_strcat(w->response.data, "});");
1268
1269                 else {
1270                         // the client already has the latest data
1271                         buffer_flush(w->response.data);
1272                         buffer_sprintf(w->response.data,
1273                                 "%s({version:'%s',reqId:'%s',status:'error',errors:[{reason:'not_modified',message:'Data not modified'}]});",
1274                                 google_responseHandler, google_version, google_reqId);
1275                 }
1276         }
1277
1278         return 200;
1279 }
1280
1281 const char *web_content_type_to_string(uint8_t contenttype) {
1282         switch(contenttype) {
1283                 case CT_TEXT_HTML:
1284                         return "text/html; charset=utf-8";
1285
1286                 case CT_APPLICATION_XML:
1287                         return "application/xml; charset=utf-8";
1288
1289                 case CT_APPLICATION_JSON:
1290                         return "application/json; charset=utf-8";
1291
1292                 case CT_APPLICATION_X_JAVASCRIPT:
1293                         return "application/x-javascript; charset=utf-8";
1294
1295                 case CT_TEXT_CSS:
1296                         return "text/css; charset=utf-8";
1297
1298                 case CT_TEXT_XML:
1299                         return "text/xml; charset=utf-8";
1300
1301                 case CT_TEXT_XSL:
1302                         return "text/xsl; charset=utf-8";
1303
1304                 case CT_APPLICATION_OCTET_STREAM:
1305                         return "application/octet-stream";
1306
1307                 case CT_IMAGE_SVG_XML:
1308                         return "image/svg+xml";
1309
1310                 case CT_APPLICATION_X_FONT_TRUETYPE:
1311                         return "application/x-font-truetype";
1312
1313                 case CT_APPLICATION_X_FONT_OPENTYPE:
1314                         return "application/x-font-opentype";
1315
1316                 case CT_APPLICATION_FONT_WOFF:
1317                         return "application/font-woff";
1318
1319                 case CT_APPLICATION_FONT_WOFF2:
1320                         return "application/font-woff2";
1321
1322                 case CT_APPLICATION_VND_MS_FONTOBJ:
1323                         return "application/vnd.ms-fontobject";
1324
1325                 case CT_IMAGE_PNG:
1326                         return "image/png";
1327
1328                 case CT_IMAGE_JPG:
1329                         return "image/jpeg";
1330
1331                 case CT_IMAGE_GIF:
1332                         return "image/gif";
1333
1334                 case CT_IMAGE_XICON:
1335                         return "image/x-icon";
1336
1337                 case CT_IMAGE_BMP:
1338                         return "image/bmp";
1339
1340                 case CT_IMAGE_ICNS:
1341                         return "image/icns";
1342
1343                 default:
1344                 case CT_TEXT_PLAIN:
1345                         return "text/plain; charset=utf-8";
1346         }
1347 }
1348
1349
1350 const char *web_response_code_to_string(int code) {
1351         switch(code) {
1352                 case 200:
1353                         return "OK";
1354
1355                 case 307:
1356                         return "Temporary Redirect";
1357
1358                 case 400:
1359                         return "Bad Request";
1360
1361                 case 403:
1362                         return "Forbidden";
1363
1364                 case 404:
1365                         return "Not Found";
1366
1367                 case 412:
1368                         return "Preconditions Failed";
1369
1370                 default:
1371                         if(code >= 100 && code < 200)
1372                                 return "Informational";
1373
1374                         if(code >= 200 && code < 300)
1375                                 return "Successful";
1376
1377                         if(code >= 300 && code < 400)
1378                                 return "Redirection";
1379
1380                         if(code >= 400 && code < 500)
1381                                 return "Bad Request";
1382
1383                         if(code >= 500 && code < 600)
1384                                 return "Server Error";
1385
1386                         return "Undefined Error";
1387         }
1388 }
1389
1390 static inline char *http_header_parse(struct web_client *w, char *s) {
1391         static uint32_t hash_origin = 0, hash_connection = 0, hash_accept_encoding = 0;
1392
1393         if(unlikely(!hash_origin)) {
1394                 hash_origin = simple_uhash("Origin");
1395                 hash_connection = simple_uhash("Connection");
1396                 hash_accept_encoding = simple_uhash("Accept-Encoding");
1397         }
1398
1399         char *e = s;
1400
1401         // find the :
1402         while(*e && *e != ':') e++;
1403         if(!*e || e[1] != ' ') return e;
1404
1405         // get the name
1406         *e = '\0';
1407
1408         // find the value
1409         char *v, *ve;
1410         v = ve = e + 2;
1411
1412         // find the \r
1413         while(*ve && *ve != '\r') ve++;
1414         if(!*ve || ve[1] != '\n') {
1415                 *e = ':';
1416                 return ve;
1417         }
1418
1419         // terminate the value
1420         *ve = '\0';
1421
1422         // fprintf(stderr, "HEADER: '%s' = '%s'\n", s, v);
1423         uint32_t hash = simple_uhash(s);
1424
1425         if(hash == hash_origin && !strcasecmp(s, "Origin"))
1426                 strncpyz(w->origin, v, ORIGIN_MAX);
1427
1428         else if(hash == hash_connection && !strcasecmp(s, "Connection")) {
1429                 if(strcasestr(v, "keep-alive"))
1430                         w->keepalive = 1;
1431         }
1432 #ifdef NETDATA_WITH_ZLIB
1433         else if(hash == hash_accept_encoding && !strcasecmp(s, "Accept-Encoding")) {
1434                 if(web_enable_gzip) {
1435                         if(strcasestr(v, "gzip"))
1436                                 web_client_enable_deflate(w, 1);
1437                         //
1438                         // does not seem to work
1439                         // else if(strcasestr(v, "deflate"))
1440                         //      web_client_enable_deflate(w, 0);
1441                 }
1442         }
1443 #endif /* NETDATA_WITH_ZLIB */
1444
1445         *e = ':';
1446         *ve = '\r';
1447         return ve;
1448 }
1449
1450 // http_request_validate()
1451 // returns:
1452 // = 0 : all good, process the request
1453 // > 0 : request is not supported
1454 // < 0 : request is incomplete - wait for more data
1455
1456 static inline int http_request_validate(struct web_client *w) {
1457         char *s = w->response.data->buffer, *encoded_url = NULL;
1458
1459         // is is a valid request?
1460         if(!strncmp(s, "GET ", 4)) {
1461                 encoded_url = s = &s[4];
1462                 w->mode = WEB_CLIENT_MODE_NORMAL;
1463         }
1464         else if(!strncmp(s, "OPTIONS ", 8)) {
1465                 encoded_url = s = &s[8];
1466                 w->mode = WEB_CLIENT_MODE_OPTIONS;
1467         }
1468         else {
1469                 w->wait_receive = 0;
1470                 return 1;
1471         }
1472
1473         // find the SPACE + "HTTP/"
1474         while(*s) {
1475                 // find the next space
1476                 while (*s && *s != ' ') s++;
1477
1478                 // is it SPACE + "HTTP/" ?
1479                 if(*s && !strncmp(s, " HTTP/", 6)) break;
1480                 else s++;
1481         }
1482
1483         // incomplete requests
1484         if(unlikely(!*s)) {
1485                 w->wait_receive = 1;
1486                 return -2;
1487         }
1488
1489         // we have the end of encoded_url - remember it
1490         char *ue = s;
1491
1492         // make sure we have complete request
1493         // complete requests contain: \r\n\r\n
1494         while(*s) {
1495                 // find a line feed
1496                 while(*s && *s++ != '\r');
1497
1498                 // did we reach the end?
1499                 if(unlikely(!*s)) break;
1500
1501                 // is it \r\n ?
1502                 if(likely(*s++ == '\n')) {
1503
1504                         // is it again \r\n ? (header end)
1505                         if(unlikely(*s == '\r' && s[1] == '\n')) {
1506                                 // a valid complete HTTP request found
1507
1508                                 *ue = '\0';
1509                                 url_decode_r(w->decoded_url, encoded_url, URL_MAX + 1);
1510                                 *ue = ' ';
1511
1512                                 // copy the URL - we are going to overwrite parts of it
1513                                 // FIXME -- we should avoid it
1514                                 strncpyz(w->last_url, w->decoded_url, URL_MAX);
1515
1516                                 w->wait_receive = 0;
1517                                 return 0;
1518                         }
1519
1520                         // another header line
1521                         s = http_header_parse(w, s);
1522                 }
1523         }
1524
1525         // incomplete request
1526         w->wait_receive = 1;
1527         return -3;
1528 }
1529
1530 void web_client_process(struct web_client *w) {
1531         static uint32_t hash_api = 0, hash_netdata_conf = 0, hash_data = 0, hash_datasource = 0, hash_graph = 0,
1532                         hash_list = 0, hash_all_json = 0, hash_exit = 0, hash_debug = 0, hash_mirror = 0;
1533
1534         if(unlikely(!hash_api)) {
1535                 hash_api = simple_hash("api");
1536                 hash_netdata_conf = simple_hash("netdata.conf");
1537                 hash_data = simple_hash(WEB_PATH_DATA);
1538                 hash_datasource = simple_hash(WEB_PATH_DATASOURCE);
1539                 hash_graph = simple_hash(WEB_PATH_GRAPH);
1540                 hash_list = simple_hash("list");
1541                 hash_all_json = simple_hash("all.json");
1542                 hash_exit = simple_hash("exit");
1543                 hash_debug = simple_hash("debug");
1544                 hash_mirror = simple_hash("mirror");
1545         }
1546
1547         int code = 500;
1548         ssize_t bytes;
1549
1550         int what_to_do = http_request_validate(w);
1551
1552         // wait for more data
1553         if(what_to_do < 0) {
1554                 if(w->response.data->len > TOO_BIG_REQUEST) {
1555                         strcpy(w->last_url, "too big request");
1556
1557                         debug(D_WEB_CLIENT_ACCESS, "%llu: Received request is too big (%zd bytes).", w->id, w->response.data->len);
1558
1559                         code = 400;
1560                         buffer_flush(w->response.data);
1561                         buffer_sprintf(w->response.data, "Received request is too big  (%zd bytes).\r\n", w->response.data->len);
1562                 }
1563                 else {
1564                         // wait for more data
1565                         return;
1566                 }
1567         }
1568         else if(what_to_do > 0) {
1569                 strcpy(w->last_url, "not a valid request");
1570
1571                 debug(D_WEB_CLIENT_ACCESS, "%llu: Cannot understand '%s'.", w->id, w->response.data->buffer);
1572
1573                 code = 500;
1574                 buffer_flush(w->response.data);
1575                 buffer_strcat(w->response.data, "I don't understand you...\r\n");
1576         }
1577         else { // what_to_do == 0
1578                 gettimeofday(&w->tv_in, NULL);
1579
1580                 if(w->mode == WEB_CLIENT_MODE_OPTIONS) {
1581                         code = 200;
1582                         w->response.data->contenttype = CT_TEXT_PLAIN;
1583                         buffer_flush(w->response.data);
1584                         buffer_strcat(w->response.data, "OK");
1585                 }
1586                 else {
1587                         char *url = w->decoded_url;
1588                         char *tok = mystrsep(&url, "/?");
1589                         if(tok && *tok) {
1590                                 uint32_t hash = simple_hash(tok);
1591                                 debug(D_WEB_CLIENT, "%llu: Processing command '%s'.", w->id, tok);
1592
1593                                 if(hash == hash_api && strcmp(tok, "api") == 0) {
1594                                         // the client is requesting api access
1595                                         code = web_client_api_request(w, url);
1596                                 }
1597                                 else if(hash == hash_netdata_conf && strcmp(tok, "netdata.conf") == 0) {
1598                                         code = 200;
1599                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending netdata.conf ...", w->id);
1600
1601                                         w->response.data->contenttype = CT_TEXT_PLAIN;
1602                                         buffer_flush(w->response.data);
1603                                         generate_config(w->response.data, 0);
1604                                 }
1605                                 else if(hash == hash_data && strcmp(tok, WEB_PATH_DATA) == 0) { // "data"
1606                                         // the client is requesting rrd data -- OLD API
1607                                         code = web_client_api_old_data_request(w, url, DATASOURCE_JSON);
1608                                 }
1609                                 else if(hash == hash_datasource && strcmp(tok, WEB_PATH_DATASOURCE) == 0) { // "datasource"
1610                                         // the client is requesting google datasource -- OLD API
1611                                         code = web_client_api_old_data_request(w, url, DATASOURCE_DATATABLE_JSONP);
1612                                 }
1613                                 else if(hash == hash_graph && strcmp(tok, WEB_PATH_GRAPH) == 0) { // "graph"
1614                                         // the client is requesting an rrd graph -- OLD API
1615
1616                                         // get the name of the data to show
1617                                         tok = mystrsep(&url, "/?&");
1618                                         if(tok && *tok) {
1619                                                 debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
1620
1621                                                 // do we have such a data set?
1622                                                 RRDSET *st = rrdset_find_byname(tok);
1623                                                 if(!st) st = rrdset_find(tok);
1624                                                 if(!st) {
1625                                                         // we don't have it
1626                                                         // try to send a file with that name
1627                                                         buffer_flush(w->response.data);
1628                                                         code = mysendfile(w, tok);
1629                                                 }
1630                                                 else {
1631                                                         code = 200;
1632                                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending %s.json of RRD_STATS...", w->id, st->name);
1633                                                         w->response.data->contenttype = CT_APPLICATION_JSON;
1634                                                         buffer_flush(w->response.data);
1635                                                         rrd_stats_graph_json(st, url, w->response.data);
1636                                                 }
1637                                         }
1638                                         else {
1639                                                 code = 400;
1640                                                 buffer_flush(w->response.data);
1641                                                 buffer_strcat(w->response.data, "Graph name?\r\n");
1642                                         }
1643                                 }
1644                                 else if(hash == hash_list && strcmp(tok, "list") == 0) {
1645                                         // OLD API
1646                                         code = 200;
1647
1648                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending list of RRD_STATS...", w->id);
1649
1650                                         buffer_flush(w->response.data);
1651                                         RRDSET *st = rrdset_root;
1652
1653                                         for ( ; st ; st = st->next )
1654                                                 buffer_sprintf(w->response.data, "%s\n", st->name);
1655                                 }
1656                                 else if(hash == hash_all_json && strcmp(tok, "all.json") == 0) {
1657                                         // OLD API
1658                                         code = 200;
1659                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending JSON list of all monitors of RRD_STATS...", w->id);
1660
1661                                         w->response.data->contenttype = CT_APPLICATION_JSON;
1662                                         buffer_flush(w->response.data);
1663                                         rrd_stats_all_json(w->response.data);
1664                                 }
1665 #ifdef NETDATA_INTERNAL_CHECKS
1666                                 else if(hash == hash_exit && strcmp(tok, "exit") == 0) {
1667                                         code = 200;
1668                                         w->response.data->contenttype = CT_TEXT_PLAIN;
1669                                         buffer_flush(w->response.data);
1670
1671                                         if(!netdata_exit)
1672                                                 buffer_strcat(w->response.data, "ok, will do...");
1673                                         else
1674                                                 buffer_strcat(w->response.data, "I am doing it already");
1675
1676                                         netdata_exit = 1;
1677                                 }
1678                                 else if(hash == hash_debug && strcmp(tok, "debug") == 0) {
1679                                         buffer_flush(w->response.data);
1680
1681                                         // get the name of the data to show
1682                                         tok = mystrsep(&url, "/?&");
1683                                         if(tok && *tok) {
1684                                                 debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
1685
1686                                                 // do we have such a data set?
1687                                                 RRDSET *st = rrdset_find_byname(tok);
1688                                                 if(!st) st = rrdset_find(tok);
1689                                                 if(!st) {
1690                                                         code = 404;
1691                                                         buffer_sprintf(w->response.data, "Chart %s is not found.\r\n", tok);
1692                                                         debug(D_WEB_CLIENT_ACCESS, "%llu: %s is not found.", w->id, tok);
1693                                                 }
1694                                                 else {
1695                                                         code = 200;
1696                                                         debug_flags |= D_RRD_STATS;
1697                                                         st->debug = !st->debug;
1698                                                         buffer_sprintf(w->response.data, "Chart %s has now debug %s.\r\n", tok, st->debug?"enabled":"disabled");
1699                                                         debug(D_WEB_CLIENT_ACCESS, "%llu: debug for %s is %s.", w->id, tok, st->debug?"enabled":"disabled");
1700                                                 }
1701                                         }
1702                                         else {
1703                                                 code = 500;
1704                                                 buffer_flush(w->response.data);
1705                                                 buffer_strcat(w->response.data, "debug which chart?\r\n");
1706                                         }
1707                                 }
1708                                 else if(hash == hash_mirror && strcmp(tok, "mirror") == 0) {
1709                                         code = 200;
1710
1711                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Mirroring...", w->id);
1712
1713                                         // replace the zero bytes with spaces
1714                                         buffer_char_replace(w->response.data, '\0', ' ');
1715
1716                                         // just leave the buffer as is
1717                                         // it will be copied back to the client
1718                                 }
1719 #endif  /* NETDATA_INTERNAL_CHECKS */
1720                                 else {
1721                                         char filename[FILENAME_MAX+1];
1722                                         url = filename;
1723                                         strncpyz(filename, w->last_url, FILENAME_MAX);
1724                                         tok = mystrsep(&url, "?");
1725                                         buffer_flush(w->response.data);
1726                                         code = mysendfile(w, (tok && *tok)?tok:"/");
1727                                 }
1728                         }
1729                         else {
1730                                 char filename[FILENAME_MAX+1];
1731                                 url = filename;
1732                                 strncpyz(filename, w->last_url, FILENAME_MAX);
1733                                 tok = mystrsep(&url, "?");
1734                                 buffer_flush(w->response.data);
1735                                 code = mysendfile(w, (tok && *tok)?tok:"/");
1736                         }
1737                 }
1738         }
1739
1740         gettimeofday(&w->tv_ready, NULL);
1741         w->response.data->date = time(NULL);
1742         w->response.sent = 0;
1743         w->response.code = code;
1744
1745         // prepare the HTTP response header
1746         debug(D_WEB_CLIENT, "%llu: Generating HTTP header with response %d.", w->id, code);
1747
1748         const char *content_type_string = web_content_type_to_string(w->response.data->contenttype);
1749         const char *code_msg = web_response_code_to_string(code);
1750
1751         char date[100];
1752         struct tm tmbuf, *tm = gmtime_r(&w->response.data->date, &tmbuf);
1753         strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %Z", tm);
1754
1755         buffer_sprintf(w->response.header_output,
1756                 "HTTP/1.1 %d %s\r\n"
1757                 "Connection: %s\r\n"
1758                 "Server: NetData Embedded HTTP Server\r\n"
1759                 "Access-Control-Allow-Origin: %s\r\n"
1760                 "Access-Control-Allow-Credentials: true\r\n"
1761                 "Content-Type: %s\r\n"
1762                 "Date: %s\r\n"
1763                 , code, code_msg
1764                 , w->keepalive?"keep-alive":"close"
1765                 , w->origin
1766                 , content_type_string
1767                 , date
1768                 );
1769
1770         if(w->cookie1[0]) {
1771                 buffer_sprintf(w->response.header_output,
1772                    "Set-Cookie: %s\r\n",
1773                    w->cookie1);
1774         }
1775
1776         if(w->cookie2[0]) {
1777                 buffer_sprintf(w->response.header_output,
1778                    "Set-Cookie: %s\r\n",
1779                    w->cookie2);
1780         }
1781
1782         if(w->mode == WEB_CLIENT_MODE_OPTIONS) {
1783                 buffer_strcat(w->response.header_output,
1784                         "Access-Control-Allow-Methods: GET, OPTIONS\r\n"
1785                         "Access-Control-Allow-Headers: accept, x-requested-with, origin, content-type, cookie\r\n"
1786                         "Access-Control-Max-Age: 1209600\r\n" // 86400 * 14
1787                         );
1788         }
1789
1790         if(buffer_strlen(w->response.header))
1791                 buffer_strcat(w->response.header_output, buffer_tostring(w->response.header));
1792
1793         if(w->mode == WEB_CLIENT_MODE_NORMAL && (w->response.data->options & WB_CONTENT_NO_CACHEABLE)) {
1794                 buffer_sprintf(w->response.header_output,
1795                         "Expires: %s\r\n"
1796                         "Cache-Control: no-cache\r\n"
1797                         , date);
1798         }
1799         else if(w->mode != WEB_CLIENT_MODE_OPTIONS) {
1800                 char edate[100];
1801                 time_t et = w->response.data->date + (86400 * 14);
1802                 struct tm etmbuf, *etm = gmtime_r(&et, &etmbuf);
1803                 strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", etm);
1804
1805                 buffer_sprintf(w->response.header_output,
1806                         "Expires: %s\r\n"
1807                         "Cache-Control: public\r\n"
1808                         , edate);
1809         }
1810
1811         // if we know the content length, put it
1812         if(!w->response.zoutput && (w->response.data->len || w->response.rlen))
1813                 buffer_sprintf(w->response.header_output,
1814                         "Content-Length: %ld\r\n"
1815                         , w->response.data->len? w->response.data->len: w->response.rlen
1816                         );
1817         else if(!w->response.zoutput)
1818                 w->keepalive = 0;       // content-length is required for keep-alive
1819
1820         if(w->response.zoutput) {
1821                 buffer_strcat(w->response.header_output,
1822                         "Content-Encoding: gzip\r\n"
1823                         "Transfer-Encoding: chunked\r\n"
1824                         );
1825         }
1826
1827         buffer_strcat(w->response.header_output, "\r\n");
1828
1829         // sent the HTTP header
1830         debug(D_WEB_DATA, "%llu: Sending response HTTP header of size %d: '%s'"
1831                         , w->id
1832                         , buffer_strlen(w->response.header_output)
1833                         , buffer_tostring(w->response.header_output)
1834                         );
1835
1836         web_client_crock_socket(w);
1837
1838         bytes = send(w->ofd, buffer_tostring(w->response.header_output), buffer_strlen(w->response.header_output), 0);
1839         if(bytes != (ssize_t) buffer_strlen(w->response.header_output)) {
1840                 if(bytes > 0)
1841                         w->stats_sent_bytes += bytes;
1842
1843                 debug(D_WEB_CLIENT, "%llu: HTTP Header failed to be sent (I sent %d bytes but the system sent %d bytes). Closing web client.", w->id,
1844                           buffer_strlen(w->response.header_output), bytes);
1845
1846                 WEB_CLIENT_IS_DEAD(w);
1847                 return;
1848         }
1849         else
1850                 w->stats_sent_bytes += bytes;
1851
1852         // enable sending immediately if we have data
1853         if(w->response.data->len) w->wait_send = 1;
1854         else w->wait_send = 0;
1855
1856         // pretty logging
1857         switch(w->mode) {
1858                 case WEB_CLIENT_MODE_OPTIONS:
1859                         debug(D_WEB_CLIENT, "%llu: Done preparing the OPTIONS response. Sending data (%d bytes) to client.", w->id, w->response.data->len);
1860                         break;
1861
1862                 case WEB_CLIENT_MODE_NORMAL:
1863                         debug(D_WEB_CLIENT, "%llu: Done preparing the response. Sending data (%d bytes) to client.", w->id, w->response.data->len);
1864                         break;
1865
1866                 case WEB_CLIENT_MODE_FILECOPY:
1867                         if(w->response.rlen) {
1868                                 debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending data file of %d bytes to client.", w->id, w->response.rlen);
1869                                 w->wait_receive = 1;
1870
1871                                 /*
1872                                 // utilize the kernel sendfile() for copying the file to the socket.
1873                                 // this block of code can be commented, without anything missing.
1874                                 // when it is commented, the program will copy the data using async I/O.
1875                                 {
1876                                         long len = sendfile(w->ofd, w->ifd, NULL, w->response.data->rbytes);
1877                                         if(len != w->response.data->rbytes)
1878                                                 error("%llu: sendfile() should copy %ld bytes, but copied %ld. Falling back to manual copy.", w->id, w->response.data->rbytes, len);
1879                                         else
1880                                                 web_client_reset(w);
1881                                 }
1882                                 */
1883                         }
1884                         else
1885                                 debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending an unknown amount of bytes to client.", w->id);
1886                         break;
1887
1888                 default:
1889                         fatal("%llu: Unknown client mode %d.", w->id, w->mode);
1890                         break;
1891         }
1892 }
1893
1894 ssize_t web_client_send_chunk_header(struct web_client *w, size_t len)
1895 {
1896         debug(D_DEFLATE, "%llu: OPEN CHUNK of %d bytes (hex: %x).", w->id, len, len);
1897         char buf[1024];
1898         sprintf(buf, "%zX\r\n", len);
1899
1900         ssize_t bytes = send(w->ofd, buf, strlen(buf), 0);
1901         if(bytes > 0) {
1902                 debug(D_DEFLATE, "%llu: Sent chunk header %d bytes.", w->id, bytes);
1903                 w->stats_sent_bytes += bytes;
1904         }
1905
1906         else if(bytes == 0) {
1907                 debug(D_WEB_CLIENT, "%llu: Did not send chunk header to the client.", w->id);
1908                 WEB_CLIENT_IS_DEAD(w);
1909         }
1910         else {
1911                 debug(D_WEB_CLIENT, "%llu: Failed to send chunk header to client.", w->id);
1912                 WEB_CLIENT_IS_DEAD(w);
1913         }
1914
1915         return bytes;
1916 }
1917
1918 ssize_t web_client_send_chunk_close(struct web_client *w)
1919 {
1920         //debug(D_DEFLATE, "%llu: CLOSE CHUNK.", w->id);
1921
1922         ssize_t bytes = send(w->ofd, "\r\n", 2, 0);
1923         if(bytes > 0) {
1924                 debug(D_DEFLATE, "%llu: Sent chunk suffix %d bytes.", w->id, bytes);
1925                 w->stats_sent_bytes += bytes;
1926         }
1927
1928         else if(bytes == 0) {
1929                 debug(D_WEB_CLIENT, "%llu: Did not send chunk suffix to the client.", w->id);
1930                 WEB_CLIENT_IS_DEAD(w);
1931         }
1932         else {
1933                 debug(D_WEB_CLIENT, "%llu: Failed to send chunk suffix to client.", w->id);
1934                 WEB_CLIENT_IS_DEAD(w);
1935         }
1936
1937         return bytes;
1938 }
1939
1940 ssize_t web_client_send_chunk_finalize(struct web_client *w)
1941 {
1942         //debug(D_DEFLATE, "%llu: FINALIZE CHUNK.", w->id);
1943
1944         ssize_t bytes = send(w->ofd, "\r\n0\r\n\r\n", 7, 0);
1945         if(bytes > 0) {
1946                 debug(D_DEFLATE, "%llu: Sent chunk suffix %d bytes.", w->id, bytes);
1947                 w->stats_sent_bytes += bytes;
1948         }
1949
1950         else if(bytes == 0) {
1951                 debug(D_WEB_CLIENT, "%llu: Did not send chunk finalize suffix to the client.", w->id);
1952                 WEB_CLIENT_IS_DEAD(w);
1953         }
1954         else {
1955                 debug(D_WEB_CLIENT, "%llu: Failed to send chunk finalize suffix to client.", w->id);
1956                 WEB_CLIENT_IS_DEAD(w);
1957         }
1958
1959         return bytes;
1960 }
1961
1962 #ifdef NETDATA_WITH_ZLIB
1963 ssize_t web_client_send_deflate(struct web_client *w)
1964 {
1965         ssize_t len = 0, t = 0;
1966
1967         // when using compression,
1968         // w->response.sent is the amount of bytes passed through compression
1969
1970         debug(D_DEFLATE, "%llu: web_client_send_deflate(): w->response.data->len = %d, w->response.sent = %d, w->response.zhave = %d, w->response.zsent = %d, w->response.zstream.avail_in = %d, w->response.zstream.avail_out = %d, w->response.zstream.total_in = %d, w->response.zstream.total_out = %d.", w->id, w->response.data->len, w->response.sent, w->response.zhave, w->response.zsent, w->response.zstream.avail_in, w->response.zstream.avail_out, w->response.zstream.total_in, w->response.zstream.total_out);
1971
1972         if(w->response.data->len - w->response.sent == 0 && w->response.zstream.avail_in == 0 && w->response.zhave == w->response.zsent && w->response.zstream.avail_out != 0) {
1973                 // there is nothing to send
1974
1975                 debug(D_WEB_CLIENT, "%llu: Out of output data.", w->id);
1976
1977                 // finalize the chunk
1978                 if(w->response.sent != 0) {
1979                         t = web_client_send_chunk_finalize(w);
1980                         if(t < 0) return t;
1981                 }
1982
1983                 if(w->mode == WEB_CLIENT_MODE_FILECOPY && w->wait_receive && w->response.rlen && w->response.rlen > w->response.data->len) {
1984                         // we have to wait, more data will come
1985                         debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
1986                         w->wait_send = 0;
1987                         return t;
1988                 }
1989
1990                 if(unlikely(!w->keepalive)) {
1991                         debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %ld bytes sent.", w->id, w->response.sent);
1992                         WEB_CLIENT_IS_DEAD(w);
1993                         return t;
1994                 }
1995
1996                 // reset the client
1997                 web_client_reset(w);
1998                 debug(D_WEB_CLIENT, "%llu: Done sending all data on socket.", w->id);
1999                 return t;
2000         }
2001
2002         if(w->response.zhave == w->response.zsent) {
2003                 // compress more input data
2004
2005                 // close the previous open chunk
2006                 if(w->response.sent != 0) {
2007                         t = web_client_send_chunk_close(w);
2008                         if(t < 0) return t;
2009                 }
2010
2011                 debug(D_DEFLATE, "%llu: Compressing %d new bytes starting from %d (and %d left behind).", w->id, (w->response.data->len - w->response.sent), w->response.sent, w->response.zstream.avail_in);
2012
2013                 // give the compressor all the data not passed through the compressor yet
2014                 if(w->response.data->len > w->response.sent) {
2015                         w->response.zstream.next_in = (Bytef *)&w->response.data->buffer[w->response.sent - w->response.zstream.avail_in];
2016                         w->response.zstream.avail_in += (uInt) (w->response.data->len - w->response.sent);
2017                 }
2018
2019                 // reset the compressor output buffer
2020                 w->response.zstream.next_out = w->response.zbuffer;
2021                 w->response.zstream.avail_out = ZLIB_CHUNK;
2022
2023                 // ask for FINISH if we have all the input
2024                 int flush = Z_SYNC_FLUSH;
2025                 if(w->mode == WEB_CLIENT_MODE_NORMAL
2026                         || (w->mode == WEB_CLIENT_MODE_FILECOPY && !w->wait_receive && w->response.data->len == w->response.rlen)) {
2027                         flush = Z_FINISH;
2028                         debug(D_DEFLATE, "%llu: Requesting Z_FINISH, if possible.", w->id);
2029                 }
2030                 else {
2031                         debug(D_DEFLATE, "%llu: Requesting Z_SYNC_FLUSH.", w->id);
2032                 }
2033
2034                 // compress
2035                 if(deflate(&w->response.zstream, flush) == Z_STREAM_ERROR) {
2036                         error("%llu: Compression failed. Closing down client.", w->id);
2037                         web_client_reset(w);
2038                         return(-1);
2039                 }
2040
2041                 w->response.zhave = ZLIB_CHUNK - w->response.zstream.avail_out;
2042                 w->response.zsent = 0;
2043
2044                 // keep track of the bytes passed through the compressor
2045                 w->response.sent = w->response.data->len;
2046
2047                 debug(D_DEFLATE, "%llu: Compression produced %d bytes.", w->id, w->response.zhave);
2048
2049                 // open a new chunk
2050                 ssize_t t2 = web_client_send_chunk_header(w, w->response.zhave);
2051                 if(t2 < 0) return t2;
2052                 t += t2;
2053         }
2054
2055         debug(D_WEB_CLIENT, "%llu: Sending %d bytes of data (+%d of chunk header).", w->id, w->response.zhave - w->response.zsent, t);
2056
2057         len = send(w->ofd, &w->response.zbuffer[w->response.zsent], (size_t) (w->response.zhave - w->response.zsent), MSG_DONTWAIT);
2058         if(len > 0) {
2059                 w->stats_sent_bytes += len;
2060                 w->response.zsent += len;
2061                 len += t;
2062                 debug(D_WEB_CLIENT, "%llu: Sent %d bytes.", w->id, len);
2063         }
2064         else if(len == 0) {
2065                 debug(D_WEB_CLIENT, "%llu: Did not send any bytes to the client (zhave = %ld, zsent = %ld, need to send = %ld).", w->id, w->response.zhave, w->response.zsent, w->response.zhave - w->response.zsent);
2066                 WEB_CLIENT_IS_DEAD(w);
2067         }
2068         else {
2069                 debug(D_WEB_CLIENT, "%llu: Failed to send data to client.", w->id);
2070                 WEB_CLIENT_IS_DEAD(w);
2071         }
2072
2073         return(len);
2074 }
2075 #endif // NETDATA_WITH_ZLIB
2076
2077 ssize_t web_client_send(struct web_client *w) {
2078 #ifdef NETDATA_WITH_ZLIB
2079         if(likely(w->response.zoutput)) return web_client_send_deflate(w);
2080 #endif // NETDATA_WITH_ZLIB
2081
2082         ssize_t bytes;
2083
2084         if(unlikely(w->response.data->len - w->response.sent == 0)) {
2085                 // there is nothing to send
2086
2087                 debug(D_WEB_CLIENT, "%llu: Out of output data.", w->id);
2088
2089                 // there can be two cases for this
2090                 // A. we have done everything
2091                 // B. we temporarily have nothing to send, waiting for the buffer to be filled by ifd
2092
2093                 if(w->mode == WEB_CLIENT_MODE_FILECOPY && w->wait_receive && w->response.rlen && w->response.rlen > w->response.data->len) {
2094                         // we have to wait, more data will come
2095                         debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
2096                         w->wait_send = 0;
2097                         return 0;
2098                 }
2099
2100                 if(unlikely(!w->keepalive)) {
2101                         debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %ld bytes sent.", w->id, w->response.sent);
2102                         WEB_CLIENT_IS_DEAD(w);
2103                         return 0;
2104                 }
2105
2106                 web_client_reset(w);
2107                 debug(D_WEB_CLIENT, "%llu: Done sending all data on socket. Waiting for next request on the same socket.", w->id);
2108                 return 0;
2109         }
2110
2111         bytes = send(w->ofd, &w->response.data->buffer[w->response.sent], w->response.data->len - w->response.sent, MSG_DONTWAIT);
2112         if(likely(bytes > 0)) {
2113                 w->stats_sent_bytes += bytes;
2114                 w->response.sent += bytes;
2115                 debug(D_WEB_CLIENT, "%llu: Sent %d bytes.", w->id, bytes);
2116         }
2117         else if(likely(bytes == 0)) {
2118                 debug(D_WEB_CLIENT, "%llu: Did not send any bytes to the client.", w->id);
2119                 WEB_CLIENT_IS_DEAD(w);
2120         }
2121         else {
2122                 debug(D_WEB_CLIENT, "%llu: Failed to send data to client.", w->id);
2123                 WEB_CLIENT_IS_DEAD(w);
2124         }
2125
2126         return(bytes);
2127 }
2128
2129 ssize_t web_client_receive(struct web_client *w)
2130 {
2131         // do we have any space for more data?
2132         buffer_need_bytes(w->response.data, WEB_REQUEST_LENGTH);
2133
2134         ssize_t left = w->response.data->size - w->response.data->len;
2135         ssize_t bytes;
2136
2137         if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY))
2138                 bytes = read(w->ifd, &w->response.data->buffer[w->response.data->len], (size_t) (left - 1));
2139         else
2140                 bytes = recv(w->ifd, &w->response.data->buffer[w->response.data->len], (size_t) (left - 1), MSG_DONTWAIT);
2141
2142         if(likely(bytes > 0)) {
2143                 if(w->mode != WEB_CLIENT_MODE_FILECOPY)
2144                         w->stats_received_bytes += bytes;
2145
2146                 size_t old = w->response.data->len;
2147                 w->response.data->len += bytes;
2148                 w->response.data->buffer[w->response.data->len] = '\0';
2149
2150                 debug(D_WEB_CLIENT, "%llu: Received %d bytes.", w->id, bytes);
2151                 debug(D_WEB_DATA, "%llu: Received data: '%s'.", w->id, &w->response.data->buffer[old]);
2152
2153                 if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
2154                         w->wait_send = 1;
2155
2156                         if(w->response.rlen && w->response.data->len >= w->response.rlen)
2157                                 w->wait_receive = 0;
2158                 }
2159         }
2160         else if(likely(bytes == 0)) {
2161                 debug(D_WEB_CLIENT, "%llu: Out of input data.", w->id);
2162
2163                 // if we cannot read, it means we have an error on input.
2164                 // if however, we are copying a file from ifd to ofd, we should not return an error.
2165                 // in this case, the error should be generated when the file has been sent to the client.
2166
2167                 if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
2168                         // we are copying data from ifd to ofd
2169                         // let it finish copying...
2170                         w->wait_receive = 0;
2171
2172                         debug(D_WEB_CLIENT, "%llu: Read the whole file.", w->id);
2173                         if(w->ifd != w->ofd) close(w->ifd);
2174                         w->ifd = w->ofd;
2175                 }
2176                 else {
2177                         debug(D_WEB_CLIENT, "%llu: failed to receive data.", w->id);
2178                         WEB_CLIENT_IS_DEAD(w);
2179                 }
2180         }
2181         else {
2182                 debug(D_WEB_CLIENT, "%llu: receive data failed.", w->id);
2183                 WEB_CLIENT_IS_DEAD(w);
2184         }
2185
2186         return(bytes);
2187 }
2188
2189
2190 // --------------------------------------------------------------------------------------
2191 // the thread of a single client
2192
2193 // 1. waits for input and output, using async I/O
2194 // 2. it processes HTTP requests
2195 // 3. it generates HTTP responses
2196 // 4. it copies data from input to output if mode is FILECOPY
2197
2198 void *web_client_main(void *ptr)
2199 {
2200         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
2201                 error("Cannot set pthread cancel type to DEFERRED.");
2202
2203         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
2204                 error("Cannot set pthread cancel state to ENABLE.");
2205
2206         struct web_client *w = ptr;
2207         struct pollfd fds[2], *ifd, *ofd;
2208         int retval, fdmax = 0, timeout;
2209
2210         log_access("%llu: %s port %s connected on thread task id %d", w->id, w->client_ip, w->client_port, gettid());
2211
2212         for(;;) {
2213                 if(unlikely(w->dead)) {
2214                         debug(D_WEB_CLIENT, "%llu: client is dead.", w->id);
2215                         break;
2216                 }
2217                 else if(unlikely(!w->wait_receive && !w->wait_send)) {
2218                         debug(D_WEB_CLIENT, "%llu: client is not set for neither receiving nor sending data.");
2219                         break;
2220                 }
2221
2222                 if(unlikely(w->ifd < 0 || w->ofd < 0)) {
2223                         error("%llu: invalid file descriptor, ifd = %d, ofd = %d (required 0 <= fd", w->id, w->ifd, w->ofd);
2224                         break;
2225                 }
2226
2227                 if(w->ifd == w->ofd) {
2228                         fds[0].fd = w->ifd;
2229                         fds[0].events = 0;
2230                         fds[0].revents = 0;
2231
2232                         if(w->wait_receive) fds[0].events |= POLLIN;
2233                         if(w->wait_send)    fds[0].events |= POLLOUT;
2234
2235                         fds[1].fd = -1;
2236                         fds[1].events = 0;
2237                         fds[1].revents = 0;
2238
2239                         ifd = ofd = &fds[0];
2240
2241                         fdmax = 1;
2242                 }
2243                 else {
2244                         fds[0].fd = w->ifd;
2245                         fds[0].events = 0;
2246                         fds[0].revents = 0;
2247                         if(w->wait_receive) fds[0].events |= POLLIN;
2248                         ifd = &fds[0];
2249
2250                         fds[1].fd = w->ofd;
2251                         fds[1].events = 0;
2252                         fds[1].revents = 0;
2253                         if(w->wait_send)    fds[1].events |= POLLOUT;
2254                         ofd = &fds[1];
2255
2256                         fdmax = 2;
2257                 }
2258
2259                 debug(D_WEB_CLIENT, "%llu: Waiting socket async I/O for %s %s", w->id, w->wait_receive?"INPUT":"", w->wait_send?"OUTPUT":"");
2260                 errno = 0;
2261                 timeout = web_client_timeout * 1000;
2262                 retval = poll(fds, fdmax, timeout);
2263
2264                 if(unlikely(retval == -1)) {
2265                         if(errno == EAGAIN || errno == EINTR) {
2266                                 debug(D_WEB_CLIENT, "%llu: EAGAIN received.", w->id);
2267                                 continue;
2268                         }
2269
2270                         debug(D_WEB_CLIENT, "%llu: LISTENER: poll() failed (input fd = %d, output fd = %d). Closing client.", w->id, w->ifd, w->ofd);
2271                         break;
2272                 }
2273                 else if(unlikely(!retval)) {
2274                         debug(D_WEB_CLIENT, "%llu: Timeout while waiting socket async I/O for %s %s", w->id, w->wait_receive?"INPUT":"", w->wait_send?"OUTPUT":"");
2275                         break;
2276                 }
2277
2278                 int used = 0;
2279                 if(w->wait_send && ofd->revents & POLLOUT) {
2280                         used++;
2281                         if(web_client_send(w) < 0) {
2282                                 debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
2283                                 break;
2284                         }
2285                 }
2286
2287                 if(w->wait_receive && (ifd->revents & POLLIN || ifd->revents & POLLPRI)) {
2288                         used++;
2289                         if(web_client_receive(w) < 0) {
2290                                 debug(D_WEB_CLIENT, "%llu: Cannot receive data from client. Closing client.", w->id);
2291                                 break;
2292                         }
2293
2294                         if(w->mode == WEB_CLIENT_MODE_NORMAL) {
2295                                 debug(D_WEB_CLIENT, "%llu: Attempting to process received data.", w->id);
2296                                 web_client_process(w);
2297                         }
2298                 }
2299
2300                 if(unlikely(!used)) {
2301                         debug(D_WEB_CLIENT_ACCESS, "%llu: Received error on socket.", w->id);
2302                         break;
2303                 }
2304         }
2305
2306         web_client_reset(w);
2307
2308         log_access("%llu: %s port %s disconnected from thread task id %d", w->id, w->client_ip, w->client_port, gettid());
2309         debug(D_WEB_CLIENT, "%llu: done...", w->id);
2310
2311         // close the sockets/files now
2312         // to free file descriptors
2313         if(w->ifd == w->ofd) {
2314                 if(w->ifd != -1) close(w->ifd);
2315         }
2316         else {
2317                 if(w->ifd != -1) close(w->ifd);
2318                 if(w->ofd != -1) close(w->ofd);
2319         }
2320         w->ifd = -1;
2321         w->ofd = -1;
2322
2323         w->obsolete = 1;
2324
2325         pthread_exit(NULL);
2326         return NULL;
2327 }