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                                 buffer_sprintf(w->response.data, "{ \"status\": \"redirect\", \"registry\": \"%s\" }", registry_to_announce());
 996
 997 /*
 998                                 char *encoded_url = url_encode(machine_url);
 999                                 if(!encoded_url) {
1000                                         error("%llu: Cannot URL encode string '%s'", w->id, machine_url);
1001                                         return 500;
1002                                 }
1003
1004                                 char *encoded_name = url_encode(url_name);
1005                                 if(!encoded_name) {
1006                                         free(encoded_url);
1007                                         error("%llu: Cannot URL encode string '%s'", w->id, url_name);
1008                                         return 500;
1009                                 }
1010
1011                                 char *encoded_guid = url_encode(machine_guid);
1012                                 if(!encoded_guid) {
1013                                         free(encoded_url);
1014                                         free(encoded_name);
1015                                         error("%llu: Cannot URL encode string '%s'", w->id, machine_guid);
1016                                         return 500;
1017                                 }
1018
1019                                 buffer_sprintf(w->response.header, "Location: %s/api/v1/registry?action=access&machine=%s&name=%s&url=%s&redirects=%d\r\n",
1020                                                            registry_to_announce(), encoded_guid, encoded_name, encoded_url, redirects);
1021
1022                                 free(encoded_guid);
1023                                 free(encoded_name);
1024                                 free(encoded_url);
1025 */
1026                                 return 200;
1027                         }
1028                         return registry_request_access_json(w, person_guid, machine_guid, machine_url, url_name, time(NULL));
1029
1030                 case 'D':
1031                         return registry_request_delete_json(w, person_guid, machine_guid, machine_url, delete_url, time(NULL));
1032
1033                 case 'S':
1034                         return registry_request_search_json(w, person_guid, machine_guid, machine_url, search_machine_guid, time(NULL));
1035
1036                 case 'W':
1037                         return registry_request_switch_json(w, person_guid, machine_guid, machine_url, to_person_guid, time(NULL));
1038
1039                 case 'H':
1040                         return registry_request_hello_json(w);
1041
1042                 default:
1043                         buffer_flush(w->response.data);
1044                         buffer_sprintf(w->response.data, "Invalid registry request - you need to set an action: hello, access, delete, search");
1045                         return 400;
1046         }
1047
1048         buffer_flush(w->response.data);
1049         buffer_sprintf(w->response.data, "Invalid or no registry action.");
1050         return 400;
1051 }
1052
1053 int web_client_api_request_v1(struct web_client *w, char *url)
1054 {
1055         static uint32_t hash_data = 0, hash_chart = 0, hash_charts = 0, hash_registry = 0;
1056
1057         if(unlikely(hash_data == 0)) {
1058                 hash_data = simple_hash("data");
1059                 hash_chart = simple_hash("chart");
1060                 hash_charts = simple_hash("charts");
1061                 hash_registry = simple_hash("registry");
1062         }
1063
1064         // get the command
1065         char *tok = mystrsep(&url, "/?&");
1066         if(tok && *tok) {
1067                 debug(D_WEB_CLIENT, "%llu: Searching for API v1 command '%s'.", w->id, tok);
1068                 uint32_t hash = simple_hash(tok);
1069
1070                 if(hash == hash_data && !strcmp(tok, "data"))
1071                         return web_client_api_request_v1_data(w, url);
1072
1073                 else if(hash == hash_chart && !strcmp(tok, "chart"))
1074                         return web_client_api_request_v1_chart(w, url);
1075
1076                 else if(hash == hash_charts && !strcmp(tok, "charts"))
1077                         return web_client_api_request_v1_charts(w, url);
1078
1079                 else if(hash == hash_registry && !strcmp(tok, "registry"))
1080                         return web_client_api_request_v1_registry(w, url);
1081
1082                 else {
1083                         buffer_flush(w->response.data);
1084                         buffer_sprintf(w->response.data, "Unsupported v1 API command: %s", tok);
1085                         return 404;
1086                 }
1087         }
1088         else {
1089                 buffer_flush(w->response.data);
1090                 buffer_sprintf(w->response.data, "API v1 command?");
1091                 return 400;
1092         }
1093 }
1094
1095 int web_client_api_request(struct web_client *w, char *url)
1096 {
1097         // get the api version
1098         char *tok = mystrsep(&url, "/?&");
1099         if(tok && *tok) {
1100                 debug(D_WEB_CLIENT, "%llu: Searching for API version '%s'.", w->id, tok);
1101                 if(strcmp(tok, "v1") == 0)
1102                         return web_client_api_request_v1(w, url);
1103                 else {
1104                         buffer_flush(w->response.data);
1105                         buffer_sprintf(w->response.data, "Unsupported API version: %s", tok);
1106                         return 404;
1107                 }
1108         }
1109         else {
1110                 buffer_flush(w->response.data);
1111                 buffer_sprintf(w->response.data, "Which API version?");
1112                 return 400;
1113         }
1114 }
1115
1116 int web_client_api_old_data_request(struct web_client *w, char *url, int datasource_type)
1117 {
1118         RRDSET *st = NULL;
1119
1120         char *args = strchr(url, '?');
1121         if(args) {
1122                 *args='\0';
1123                 args = &args[1];
1124         }
1125
1126         // get the name of the data to show
1127         char *tok = mystrsep(&url, "/");
1128
1129         // do we have such a data set?
1130         if(tok && *tok) {
1131                 debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
1132                 st = rrdset_find_byname(tok);
1133                 if(!st) st = rrdset_find(tok);
1134         }
1135
1136         if(!st) {
1137                 // we don't have it
1138                 // try to send a file with that name
1139                 buffer_flush(w->response.data);
1140                 return(mysendfile(w, tok));
1141         }
1142
1143         // we have it
1144         debug(D_WEB_CLIENT, "%llu: Found RRD data with name '%s'.", w->id, tok);
1145
1146         // how many entries does the client want?
1147         long lines = rrd_default_history_entries;
1148         long group_count = 1;
1149         time_t after = 0, before = 0;
1150         int group_method = GROUP_AVERAGE;
1151         int nonzero = 0;
1152
1153         if(url) {
1154                 // parse the lines required
1155                 tok = mystrsep(&url, "/");
1156                 if(tok) lines = atoi(tok);
1157                 if(lines < 1) lines = 1;
1158         }
1159         if(url) {
1160                 // parse the group count required
1161                 tok = mystrsep(&url, "/");
1162                 if(tok && *tok) group_count = atoi(tok);
1163                 if(group_count < 1) group_count = 1;
1164                 //if(group_count > save_history / 20) group_count = save_history / 20;
1165         }
1166         if(url) {
1167                 // parse the grouping method required
1168                 tok = mystrsep(&url, "/");
1169                 if(tok && *tok) {
1170                         if(strcmp(tok, "max") == 0) group_method = GROUP_MAX;
1171                         else if(strcmp(tok, "average") == 0) group_method = GROUP_AVERAGE;
1172                         else if(strcmp(tok, "sum") == 0) group_method = GROUP_SUM;
1173                         else debug(D_WEB_CLIENT, "%llu: Unknown group method '%s'", w->id, tok);
1174                 }
1175         }
1176         if(url) {
1177                 // parse after time
1178                 tok = mystrsep(&url, "/");
1179                 if(tok && *tok) after = strtoul(tok, NULL, 10);
1180                 if(after < 0) after = 0;
1181         }
1182         if(url) {
1183                 // parse before time
1184                 tok = mystrsep(&url, "/");
1185                 if(tok && *tok) before = strtoul(tok, NULL, 10);
1186                 if(before < 0) before = 0;
1187         }
1188         if(url) {
1189                 // parse nonzero
1190                 tok = mystrsep(&url, "/");
1191                 if(tok && *tok && strcmp(tok, "nonzero") == 0) nonzero = 1;
1192         }
1193
1194         w->response.data->contenttype = CT_APPLICATION_JSON;
1195         buffer_flush(w->response.data);
1196
1197         char *google_version = "0.6";
1198         char *google_reqId = "0";
1199         char *google_sig = "0";
1200         char *google_out = "json";
1201         char *google_responseHandler = "google.visualization.Query.setResponse";
1202         char *google_outFileName = NULL;
1203         time_t last_timestamp_in_data = 0;
1204         if(datasource_type == DATASOURCE_DATATABLE_JSON || datasource_type == DATASOURCE_DATATABLE_JSONP) {
1205
1206                 w->response.data->contenttype = CT_APPLICATION_X_JAVASCRIPT;
1207
1208                 while(args) {
1209                         tok = mystrsep(&args, "&");
1210                         if(tok && *tok) {
1211                                 char *name = mystrsep(&tok, "=");
1212                                 if(name && *name && strcmp(name, "tqx") == 0) {
1213                                         char *key = mystrsep(&tok, ":");
1214                                         char *value = mystrsep(&tok, ";");
1215                                         if(key && value && *key && *value) {
1216                                                 if(strcmp(key, "version") == 0)
1217                                                         google_version = value;
1218
1219                                                 else if(strcmp(key, "reqId") == 0)
1220                                                         google_reqId = value;
1221
1222                                                 else if(strcmp(key, "sig") == 0)
1223                                                         google_sig = value;
1224
1225                                                 else if(strcmp(key, "out") == 0)
1226                                                         google_out = value;
1227
1228                                                 else if(strcmp(key, "responseHandler") == 0)
1229                                                         google_responseHandler = value;
1230
1231                                                 else if(strcmp(key, "outFileName") == 0)
1232                                                         google_outFileName = value;
1233                                         }
1234                                 }
1235                         }
1236                 }
1237
1238                 debug(D_WEB_CLIENT_ACCESS, "%llu: GOOGLE JSONP: version = '%s', reqId = '%s', sig = '%s', out = '%s', responseHandler = '%s', outFileName = '%s'",
1239                         w->id, google_version, google_reqId, google_sig, google_out, google_responseHandler, google_outFileName
1240                         );
1241
1242                 if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
1243                         last_timestamp_in_data = strtoul(google_sig, NULL, 0);
1244
1245                         // check the client wants json
1246                         if(strcmp(google_out, "json") != 0) {
1247                                 buffer_sprintf(w->response.data,
1248                                         "%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.'}]});",
1249                                         google_responseHandler, google_version, google_reqId, google_out);
1250                                         return 200;
1251                         }
1252                 }
1253         }
1254
1255         if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
1256                 buffer_sprintf(w->response.data,
1257                         "%s({version:'%s',reqId:'%s',status:'ok',sig:'%lu',table:",
1258                         google_responseHandler, google_version, google_reqId, st->last_updated.tv_sec);
1259         }
1260
1261         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);
1262         time_t timestamp_in_data = rrd_stats_json(datasource_type, st, w->response.data, lines, group_count, group_method, after, before, nonzero);
1263
1264         if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
1265                 if(timestamp_in_data > last_timestamp_in_data)
1266                         buffer_strcat(w->response.data, "});");
1267
1268                 else {
1269                         // the client already has the latest data
1270                         buffer_flush(w->response.data);
1271                         buffer_sprintf(w->response.data,
1272                                 "%s({version:'%s',reqId:'%s',status:'error',errors:[{reason:'not_modified',message:'Data not modified'}]});",
1273                                 google_responseHandler, google_version, google_reqId);
1274                 }
1275         }
1276
1277         return 200;
1278 }
1279
1280 const char *web_content_type_to_string(uint8_t contenttype) {
1281         switch(contenttype) {
1282                 case CT_TEXT_HTML:
1283                         return "text/html; charset=utf-8";
1284
1285                 case CT_APPLICATION_XML:
1286                         return "application/xml; charset=utf-8";
1287
1288                 case CT_APPLICATION_JSON:
1289                         return "application/json; charset=utf-8";
1290
1291                 case CT_APPLICATION_X_JAVASCRIPT:
1292                         return "application/x-javascript; charset=utf-8";
1293
1294                 case CT_TEXT_CSS:
1295                         return "text/css; charset=utf-8";
1296
1297                 case CT_TEXT_XML:
1298                         return "text/xml; charset=utf-8";
1299
1300                 case CT_TEXT_XSL:
1301                         return "text/xsl; charset=utf-8";
1302
1303                 case CT_APPLICATION_OCTET_STREAM:
1304                         return "application/octet-stream";
1305
1306                 case CT_IMAGE_SVG_XML:
1307                         return "image/svg+xml";
1308
1309                 case CT_APPLICATION_X_FONT_TRUETYPE:
1310                         return "application/x-font-truetype";
1311
1312                 case CT_APPLICATION_X_FONT_OPENTYPE:
1313                         return "application/x-font-opentype";
1314
1315                 case CT_APPLICATION_FONT_WOFF:
1316                         return "application/font-woff";
1317
1318                 case CT_APPLICATION_FONT_WOFF2:
1319                         return "application/font-woff2";
1320
1321                 case CT_APPLICATION_VND_MS_FONTOBJ:
1322                         return "application/vnd.ms-fontobject";
1323
1324                 case CT_IMAGE_PNG:
1325                         return "image/png";
1326
1327                 case CT_IMAGE_JPG:
1328                         return "image/jpeg";
1329
1330                 case CT_IMAGE_GIF:
1331                         return "image/gif";
1332
1333                 case CT_IMAGE_XICON:
1334                         return "image/x-icon";
1335
1336                 case CT_IMAGE_BMP:
1337                         return "image/bmp";
1338
1339                 case CT_IMAGE_ICNS:
1340                         return "image/icns";
1341
1342                 default:
1343                 case CT_TEXT_PLAIN:
1344                         return "text/plain; charset=utf-8";
1345         }
1346 }
1347
1348
1349 const char *web_response_code_to_string(int code) {
1350         switch(code) {
1351                 case 200:
1352                         return "OK";
1353
1354                 case 307:
1355                         return "Temporary Redirect";
1356
1357                 case 400:
1358                         return "Bad Request";
1359
1360                 case 403:
1361                         return "Forbidden";
1362
1363                 case 404:
1364                         return "Not Found";
1365
1366                 case 412:
1367                         return "Preconditions Failed";
1368
1369                 default:
1370                         if(code >= 100 && code < 200)
1371                                 return "Informational";
1372
1373                         if(code >= 200 && code < 300)
1374                                 return "Successful";
1375
1376                         if(code >= 300 && code < 400)
1377                                 return "Redirection";
1378
1379                         if(code >= 400 && code < 500)
1380                                 return "Bad Request";
1381
1382                         if(code >= 500 && code < 600)
1383                                 return "Server Error";
1384
1385                         return "Undefined Error";
1386         }
1387 }
1388
1389 static inline char *http_header_parse(struct web_client *w, char *s) {
1390         static uint32_t hash_origin = 0, hash_connection = 0, hash_accept_encoding = 0;
1391
1392         if(unlikely(!hash_origin)) {
1393                 hash_origin = simple_uhash("Origin");
1394                 hash_connection = simple_uhash("Connection");
1395                 hash_accept_encoding = simple_uhash("Accept-Encoding");
1396         }
1397
1398         char *e = s;
1399
1400         // find the :
1401         while(*e && *e != ':') e++;
1402         if(!*e || e[1] != ' ') return e;
1403
1404         // get the name
1405         *e = '\0';
1406
1407         // find the value
1408         char *v, *ve;
1409         v = ve = e + 2;
1410
1411         // find the \r
1412         while(*ve && *ve != '\r') ve++;
1413         if(!*ve || ve[1] != '\n') {
1414                 *e = ':';
1415                 return ve;
1416         }
1417
1418         // terminate the value
1419         *ve = '\0';
1420
1421         // fprintf(stderr, "HEADER: '%s' = '%s'\n", s, v);
1422         uint32_t hash = simple_uhash(s);
1423
1424         if(hash == hash_origin && !strcasecmp(s, "Origin"))
1425                 strncpyz(w->origin, v, ORIGIN_MAX);
1426
1427         else if(hash == hash_connection && !strcasecmp(s, "Connection")) {
1428                 if(strcasestr(v, "keep-alive"))
1429                         w->keepalive = 1;
1430         }
1431 #ifdef NETDATA_WITH_ZLIB
1432         else if(hash == hash_accept_encoding && !strcasecmp(s, "Accept-Encoding")) {
1433                 if(web_enable_gzip) {
1434                         if(strcasestr(v, "gzip"))
1435                                 web_client_enable_deflate(w, 1);
1436                         //
1437                         // does not seem to work
1438                         // else if(strcasestr(v, "deflate"))
1439                         //      web_client_enable_deflate(w, 0);
1440                 }
1441         }
1442 #endif /* NETDATA_WITH_ZLIB */
1443
1444         *e = ':';
1445         *ve = '\r';
1446         return ve;
1447 }
1448
1449 // http_request_validate()
1450 // returns:
1451 // = 0 : all good, process the request
1452 // > 0 : request is not supported
1453 // < 0 : request is incomplete - wait for more data
1454
1455 static inline int http_request_validate(struct web_client *w) {
1456         char *s = w->response.data->buffer, *encoded_url = NULL;
1457
1458         // is is a valid request?
1459         if(!strncmp(s, "GET ", 4)) {
1460                 encoded_url = s = &s[4];
1461                 w->mode = WEB_CLIENT_MODE_NORMAL;
1462         }
1463         else if(!strncmp(s, "OPTIONS ", 8)) {
1464                 encoded_url = s = &s[8];
1465                 w->mode = WEB_CLIENT_MODE_OPTIONS;
1466         }
1467         else {
1468                 w->wait_receive = 0;
1469                 return 1;
1470         }
1471
1472         // find the SPACE + "HTTP/"
1473         while(*s) {
1474                 // find the next space
1475                 while (*s && *s != ' ') s++;
1476
1477                 // is it SPACE + "HTTP/" ?
1478                 if(*s && !strncmp(s, " HTTP/", 6)) break;
1479                 else s++;
1480         }
1481
1482         // incomplete requests
1483         if(unlikely(!*s)) {
1484                 w->wait_receive = 1;
1485                 return -2;
1486         }
1487
1488         // we have the end of encoded_url - remember it
1489         char *ue = s;
1490
1491         // make sure we have complete request
1492         // complete requests contain: \r\n\r\n
1493         while(*s) {
1494                 // find a line feed
1495                 while(*s && *s++ != '\r');
1496
1497                 // did we reach the end?
1498                 if(unlikely(!*s)) break;
1499
1500                 // is it \r\n ?
1501                 if(likely(*s++ == '\n')) {
1502
1503                         // is it again \r\n ? (header end)
1504                         if(unlikely(*s == '\r' && s[1] == '\n')) {
1505                                 // a valid complete HTTP request found
1506
1507                                 *ue = '\0';
1508                                 url_decode_r(w->decoded_url, encoded_url, URL_MAX + 1);
1509                                 *ue = ' ';
1510
1511                                 // copy the URL - we are going to overwrite parts of it
1512                                 // FIXME -- we should avoid it
1513                                 strncpyz(w->last_url, w->decoded_url, URL_MAX);
1514
1515                                 w->wait_receive = 0;
1516                                 return 0;
1517                         }
1518
1519                         // another header line
1520                         s = http_header_parse(w, s);
1521                 }
1522         }
1523
1524         // incomplete request
1525         w->wait_receive = 1;
1526         return -3;
1527 }
1528
1529 void web_client_process(struct web_client *w) {
1530         static uint32_t hash_api = 0, hash_netdata_conf = 0, hash_data = 0, hash_datasource = 0, hash_graph = 0,
1531                         hash_list = 0, hash_all_json = 0, hash_exit = 0, hash_debug = 0, hash_mirror = 0;
1532
1533         if(unlikely(!hash_api)) {
1534                 hash_api = simple_hash("api");
1535                 hash_netdata_conf = simple_hash("netdata.conf");
1536                 hash_data = simple_hash(WEB_PATH_DATA);
1537                 hash_datasource = simple_hash(WEB_PATH_DATASOURCE);
1538                 hash_graph = simple_hash(WEB_PATH_GRAPH);
1539                 hash_list = simple_hash("list");
1540                 hash_all_json = simple_hash("all.json");
1541                 hash_exit = simple_hash("exit");
1542                 hash_debug = simple_hash("debug");
1543                 hash_mirror = simple_hash("mirror");
1544         }
1545
1546         int code = 500;
1547         ssize_t bytes;
1548
1549         int what_to_do = http_request_validate(w);
1550
1551         // wait for more data
1552         if(what_to_do < 0) {
1553                 if(w->response.data->len > TOO_BIG_REQUEST) {
1554                         strcpy(w->last_url, "too big request");
1555
1556                         debug(D_WEB_CLIENT_ACCESS, "%llu: Received request is too big (%zd bytes).", w->id, w->response.data->len);
1557
1558                         code = 400;
1559                         buffer_flush(w->response.data);
1560                         buffer_sprintf(w->response.data, "Received request is too big  (%zd bytes).\r\n", w->response.data->len);
1561                 }
1562                 else {
1563                         // wait for more data
1564                         return;
1565                 }
1566         }
1567         else if(what_to_do > 0) {
1568                 strcpy(w->last_url, "not a valid request");
1569
1570                 debug(D_WEB_CLIENT_ACCESS, "%llu: Cannot understand '%s'.", w->id, w->response.data->buffer);
1571
1572                 code = 500;
1573                 buffer_flush(w->response.data);
1574                 buffer_strcat(w->response.data, "I don't understand you...\r\n");
1575         }
1576         else { // what_to_do == 0
1577                 gettimeofday(&w->tv_in, NULL);
1578
1579                 if(w->mode == WEB_CLIENT_MODE_OPTIONS) {
1580                         code = 200;
1581                         w->response.data->contenttype = CT_TEXT_PLAIN;
1582                         buffer_flush(w->response.data);
1583                         buffer_strcat(w->response.data, "OK");
1584                 }
1585                 else {
1586                         char *url = w->decoded_url;
1587                         char *tok = mystrsep(&url, "/?");
1588                         if(tok && *tok) {
1589                                 uint32_t hash = simple_hash(tok);
1590                                 debug(D_WEB_CLIENT, "%llu: Processing command '%s'.", w->id, tok);
1591
1592                                 if(hash == hash_api && strcmp(tok, "api") == 0) {
1593                                         // the client is requesting api access
1594                                         code = web_client_api_request(w, url);
1595                                 }
1596                                 else if(hash == hash_netdata_conf && strcmp(tok, "netdata.conf") == 0) {
1597                                         code = 200;
1598                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending netdata.conf ...", w->id);
1599
1600                                         w->response.data->contenttype = CT_TEXT_PLAIN;
1601                                         buffer_flush(w->response.data);
1602                                         generate_config(w->response.data, 0);
1603                                 }
1604                                 else if(hash == hash_data && strcmp(tok, WEB_PATH_DATA) == 0) { // "data"
1605                                         // the client is requesting rrd data -- OLD API
1606                                         code = web_client_api_old_data_request(w, url, DATASOURCE_JSON);
1607                                 }
1608                                 else if(hash == hash_datasource && strcmp(tok, WEB_PATH_DATASOURCE) == 0) { // "datasource"
1609                                         // the client is requesting google datasource -- OLD API
1610                                         code = web_client_api_old_data_request(w, url, DATASOURCE_DATATABLE_JSONP);
1611                                 }
1612                                 else if(hash == hash_graph && strcmp(tok, WEB_PATH_GRAPH) == 0) { // "graph"
1613                                         // the client is requesting an rrd graph -- OLD API
1614
1615                                         // get the name of the data to show
1616                                         tok = mystrsep(&url, "/?&");
1617                                         if(tok && *tok) {
1618                                                 debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
1619
1620                                                 // do we have such a data set?
1621                                                 RRDSET *st = rrdset_find_byname(tok);
1622                                                 if(!st) st = rrdset_find(tok);
1623                                                 if(!st) {
1624                                                         // we don't have it
1625                                                         // try to send a file with that name
1626                                                         buffer_flush(w->response.data);
1627                                                         code = mysendfile(w, tok);
1628                                                 }
1629                                                 else {
1630                                                         code = 200;
1631                                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending %s.json of RRD_STATS...", w->id, st->name);
1632                                                         w->response.data->contenttype = CT_APPLICATION_JSON;
1633                                                         buffer_flush(w->response.data);
1634                                                         rrd_stats_graph_json(st, url, w->response.data);
1635                                                 }
1636                                         }
1637                                         else {
1638                                                 code = 400;
1639                                                 buffer_flush(w->response.data);
1640                                                 buffer_strcat(w->response.data, "Graph name?\r\n");
1641                                         }
1642                                 }
1643                                 else if(hash == hash_list && strcmp(tok, "list") == 0) {
1644                                         // OLD API
1645                                         code = 200;
1646
1647                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending list of RRD_STATS...", w->id);
1648
1649                                         buffer_flush(w->response.data);
1650                                         RRDSET *st = rrdset_root;
1651
1652                                         for ( ; st ; st = st->next )
1653                                                 buffer_sprintf(w->response.data, "%s\n", st->name);
1654                                 }
1655                                 else if(hash == hash_all_json && strcmp(tok, "all.json") == 0) {
1656                                         // OLD API
1657                                         code = 200;
1658                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending JSON list of all monitors of RRD_STATS...", w->id);
1659
1660                                         w->response.data->contenttype = CT_APPLICATION_JSON;
1661                                         buffer_flush(w->response.data);
1662                                         rrd_stats_all_json(w->response.data);
1663                                 }
1664 #ifdef NETDATA_INTERNAL_CHECKS
1665                                 else if(hash == hash_exit && strcmp(tok, "exit") == 0) {
1666                                         code = 200;
1667                                         w->response.data->contenttype = CT_TEXT_PLAIN;
1668                                         buffer_flush(w->response.data);
1669
1670                                         if(!netdata_exit)
1671                                                 buffer_strcat(w->response.data, "ok, will do...");
1672                                         else
1673                                                 buffer_strcat(w->response.data, "I am doing it already");
1674
1675                                         netdata_exit = 1;
1676                                 }
1677                                 else if(hash == hash_debug && strcmp(tok, "debug") == 0) {
1678                                         buffer_flush(w->response.data);
1679
1680                                         // get the name of the data to show
1681                                         tok = mystrsep(&url, "/?&");
1682                                         if(tok && *tok) {
1683                                                 debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
1684
1685                                                 // do we have such a data set?
1686                                                 RRDSET *st = rrdset_find_byname(tok);
1687                                                 if(!st) st = rrdset_find(tok);
1688                                                 if(!st) {
1689                                                         code = 404;
1690                                                         buffer_sprintf(w->response.data, "Chart %s is not found.\r\n", tok);
1691                                                         debug(D_WEB_CLIENT_ACCESS, "%llu: %s is not found.", w->id, tok);
1692                                                 }
1693                                                 else {
1694                                                         code = 200;
1695                                                         debug_flags |= D_RRD_STATS;
1696                                                         st->debug = !st->debug;
1697                                                         buffer_sprintf(w->response.data, "Chart %s has now debug %s.\r\n", tok, st->debug?"enabled":"disabled");
1698                                                         debug(D_WEB_CLIENT_ACCESS, "%llu: debug for %s is %s.", w->id, tok, st->debug?"enabled":"disabled");
1699                                                 }
1700                                         }
1701                                         else {
1702                                                 code = 500;
1703                                                 buffer_flush(w->response.data);
1704                                                 buffer_strcat(w->response.data, "debug which chart?\r\n");
1705                                         }
1706                                 }
1707                                 else if(hash == hash_mirror && strcmp(tok, "mirror") == 0) {
1708                                         code = 200;
1709
1710                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Mirroring...", w->id);
1711
1712                                         // replace the zero bytes with spaces
1713                                         buffer_char_replace(w->response.data, '\0', ' ');
1714
1715                                         // just leave the buffer as is
1716                                         // it will be copied back to the client
1717                                 }
1718 #endif  /* NETDATA_INTERNAL_CHECKS */
1719                                 else {
1720                                         char filename[FILENAME_MAX+1];
1721                                         url = filename;
1722                                         strncpyz(filename, w->last_url, FILENAME_MAX);
1723                                         tok = mystrsep(&url, "?");
1724                                         buffer_flush(w->response.data);
1725                                         code = mysendfile(w, (tok && *tok)?tok:"/");
1726                                 }
1727                         }
1728                         else {
1729                                 char filename[FILENAME_MAX+1];
1730                                 url = filename;
1731                                 strncpyz(filename, w->last_url, FILENAME_MAX);
1732                                 tok = mystrsep(&url, "?");
1733                                 buffer_flush(w->response.data);
1734                                 code = mysendfile(w, (tok && *tok)?tok:"/");
1735                         }
1736                 }
1737         }
1738
1739         gettimeofday(&w->tv_ready, NULL);
1740         w->response.data->date = time(NULL);
1741         w->response.sent = 0;
1742         w->response.code = code;
1743
1744         // prepare the HTTP response header
1745         debug(D_WEB_CLIENT, "%llu: Generating HTTP header with response %d.", w->id, code);
1746
1747         const char *content_type_string = web_content_type_to_string(w->response.data->contenttype);
1748         const char *code_msg = web_response_code_to_string(code);
1749
1750         char date[100];
1751         struct tm tmbuf, *tm = gmtime_r(&w->response.data->date, &tmbuf);
1752         strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %Z", tm);
1753
1754         buffer_sprintf(w->response.header_output,
1755                 "HTTP/1.1 %d %s\r\n"
1756                 "Connection: %s\r\n"
1757                 "Server: NetData Embedded HTTP Server\r\n"
1758                 "Access-Control-Allow-Origin: %s\r\n"
1759                 "Access-Control-Allow-Credentials: true\r\n"
1760                 "Content-Type: %s\r\n"
1761                 "Date: %s\r\n"
1762                 , code, code_msg
1763                 , w->keepalive?"keep-alive":"close"
1764                 , w->origin
1765                 , content_type_string
1766                 , date
1767                 );
1768
1769         if(w->cookie1[0]) {
1770                 buffer_sprintf(w->response.header_output,
1771                    "Set-Cookie: %s\r\n",
1772                    w->cookie1);
1773         }
1774
1775         if(w->cookie2[0]) {
1776                 buffer_sprintf(w->response.header_output,
1777                    "Set-Cookie: %s\r\n",
1778                    w->cookie2);
1779         }
1780
1781         if(w->mode == WEB_CLIENT_MODE_OPTIONS) {
1782                 buffer_strcat(w->response.header_output,
1783                         "Access-Control-Allow-Methods: GET, OPTIONS\r\n"
1784                         "Access-Control-Allow-Headers: accept, x-requested-with, origin, content-type, cookie\r\n"
1785                         "Access-Control-Max-Age: 1209600\r\n" // 86400 * 14
1786                         );
1787         }
1788
1789         if(buffer_strlen(w->response.header))
1790                 buffer_strcat(w->response.header_output, buffer_tostring(w->response.header));
1791
1792         if(w->mode == WEB_CLIENT_MODE_NORMAL && (w->response.data->options & WB_CONTENT_NO_CACHEABLE)) {
1793                 buffer_sprintf(w->response.header_output,
1794                         "Expires: %s\r\n"
1795                         "Cache-Control: no-cache\r\n"
1796                         , date);
1797         }
1798         else if(w->mode != WEB_CLIENT_MODE_OPTIONS) {
1799                 char edate[100];
1800                 time_t et = w->response.data->date + (86400 * 14);
1801                 struct tm etmbuf, *etm = gmtime_r(&et, &etmbuf);
1802                 strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", etm);
1803
1804                 buffer_sprintf(w->response.header_output,
1805                         "Expires: %s\r\n"
1806                         "Cache-Control: public\r\n"
1807                         , edate);
1808         }
1809
1810         // if we know the content length, put it
1811         if(!w->response.zoutput && (w->response.data->len || w->response.rlen))
1812                 buffer_sprintf(w->response.header_output,
1813                         "Content-Length: %ld\r\n"
1814                         , w->response.data->len? w->response.data->len: w->response.rlen
1815                         );
1816         else if(!w->response.zoutput)
1817                 w->keepalive = 0;       // content-length is required for keep-alive
1818
1819         if(w->response.zoutput) {
1820                 buffer_strcat(w->response.header_output,
1821                         "Content-Encoding: gzip\r\n"
1822                         "Transfer-Encoding: chunked\r\n"
1823                         );
1824         }
1825
1826         buffer_strcat(w->response.header_output, "\r\n");
1827
1828         // sent the HTTP header
1829         debug(D_WEB_DATA, "%llu: Sending response HTTP header of size %d: '%s'"
1830                         , w->id
1831                         , buffer_strlen(w->response.header_output)
1832                         , buffer_tostring(w->response.header_output)
1833                         );
1834
1835         web_client_crock_socket(w);
1836
1837         bytes = send(w->ofd, buffer_tostring(w->response.header_output), buffer_strlen(w->response.header_output), 0);
1838         if(bytes != (ssize_t) buffer_strlen(w->response.header_output)) {
1839                 if(bytes > 0)
1840                         w->stats_sent_bytes += bytes;
1841
1842                 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,
1843                           buffer_strlen(w->response.header_output), bytes);
1844
1845                 WEB_CLIENT_IS_DEAD(w);
1846                 return;
1847         }
1848         else
1849                 w->stats_sent_bytes += bytes;
1850
1851         // enable sending immediately if we have data
1852         if(w->response.data->len) w->wait_send = 1;
1853         else w->wait_send = 0;
1854
1855         // pretty logging
1856         switch(w->mode) {
1857                 case WEB_CLIENT_MODE_OPTIONS:
1858                         debug(D_WEB_CLIENT, "%llu: Done preparing the OPTIONS response. Sending data (%d bytes) to client.", w->id, w->response.data->len);
1859                         break;
1860
1861                 case WEB_CLIENT_MODE_NORMAL:
1862                         debug(D_WEB_CLIENT, "%llu: Done preparing the response. Sending data (%d bytes) to client.", w->id, w->response.data->len);
1863                         break;
1864
1865                 case WEB_CLIENT_MODE_FILECOPY:
1866                         if(w->response.rlen) {
1867                                 debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending data file of %d bytes to client.", w->id, w->response.rlen);
1868                                 w->wait_receive = 1;
1869
1870                                 /*
1871                                 // utilize the kernel sendfile() for copying the file to the socket.
1872                                 // this block of code can be commented, without anything missing.
1873                                 // when it is commented, the program will copy the data using async I/O.
1874                                 {
1875                                         long len = sendfile(w->ofd, w->ifd, NULL, w->response.data->rbytes);
1876                                         if(len != w->response.data->rbytes)
1877                                                 error("%llu: sendfile() should copy %ld bytes, but copied %ld. Falling back to manual copy.", w->id, w->response.data->rbytes, len);
1878                                         else
1879                                                 web_client_reset(w);
1880                                 }
1881                                 */
1882                         }
1883                         else
1884                                 debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending an unknown amount of bytes to client.", w->id);
1885                         break;
1886
1887                 default:
1888                         fatal("%llu: Unknown client mode %d.", w->id, w->mode);
1889                         break;
1890         }
1891 }
1892
1893 ssize_t web_client_send_chunk_header(struct web_client *w, size_t len)
1894 {
1895         debug(D_DEFLATE, "%llu: OPEN CHUNK of %d bytes (hex: %x).", w->id, len, len);
1896         char buf[1024];
1897         sprintf(buf, "%zX\r\n", len);
1898
1899         ssize_t bytes = send(w->ofd, buf, strlen(buf), 0);
1900         if(bytes > 0) {
1901                 debug(D_DEFLATE, "%llu: Sent chunk header %d bytes.", w->id, bytes);
1902                 w->stats_sent_bytes += bytes;
1903         }
1904
1905         else if(bytes == 0) {
1906                 debug(D_WEB_CLIENT, "%llu: Did not send chunk header to the client.", w->id);
1907                 WEB_CLIENT_IS_DEAD(w);
1908         }
1909         else {
1910                 debug(D_WEB_CLIENT, "%llu: Failed to send chunk header to client.", w->id);
1911                 WEB_CLIENT_IS_DEAD(w);
1912         }
1913
1914         return bytes;
1915 }
1916
1917 ssize_t web_client_send_chunk_close(struct web_client *w)
1918 {
1919         //debug(D_DEFLATE, "%llu: CLOSE CHUNK.", w->id);
1920
1921         ssize_t bytes = send(w->ofd, "\r\n", 2, 0);
1922         if(bytes > 0) {
1923                 debug(D_DEFLATE, "%llu: Sent chunk suffix %d bytes.", w->id, bytes);
1924                 w->stats_sent_bytes += bytes;
1925         }
1926
1927         else if(bytes == 0) {
1928                 debug(D_WEB_CLIENT, "%llu: Did not send chunk suffix to the client.", w->id);
1929                 WEB_CLIENT_IS_DEAD(w);
1930         }
1931         else {
1932                 debug(D_WEB_CLIENT, "%llu: Failed to send chunk suffix to client.", w->id);
1933                 WEB_CLIENT_IS_DEAD(w);
1934         }
1935
1936         return bytes;
1937 }
1938
1939 ssize_t web_client_send_chunk_finalize(struct web_client *w)
1940 {
1941         //debug(D_DEFLATE, "%llu: FINALIZE CHUNK.", w->id);
1942
1943         ssize_t bytes = send(w->ofd, "\r\n0\r\n\r\n", 7, 0);
1944         if(bytes > 0) {
1945                 debug(D_DEFLATE, "%llu: Sent chunk suffix %d bytes.", w->id, bytes);
1946                 w->stats_sent_bytes += bytes;
1947         }
1948
1949         else if(bytes == 0) {
1950                 debug(D_WEB_CLIENT, "%llu: Did not send chunk finalize suffix to the client.", w->id);
1951                 WEB_CLIENT_IS_DEAD(w);
1952         }
1953         else {
1954                 debug(D_WEB_CLIENT, "%llu: Failed to send chunk finalize suffix to client.", w->id);
1955                 WEB_CLIENT_IS_DEAD(w);
1956         }
1957
1958         return bytes;
1959 }
1960
1961 #ifdef NETDATA_WITH_ZLIB
1962 ssize_t web_client_send_deflate(struct web_client *w)
1963 {
1964         ssize_t len = 0, t = 0;
1965
1966         // when using compression,
1967         // w->response.sent is the amount of bytes passed through compression
1968
1969         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);
1970
1971         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) {
1972                 // there is nothing to send
1973
1974                 debug(D_WEB_CLIENT, "%llu: Out of output data.", w->id);
1975
1976                 // finalize the chunk
1977                 if(w->response.sent != 0) {
1978                         t = web_client_send_chunk_finalize(w);
1979                         if(t < 0) return t;
1980                 }
1981
1982                 if(w->mode == WEB_CLIENT_MODE_FILECOPY && w->wait_receive && w->response.rlen && w->response.rlen > w->response.data->len) {
1983                         // we have to wait, more data will come
1984                         debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
1985                         w->wait_send = 0;
1986                         return t;
1987                 }
1988
1989                 if(unlikely(!w->keepalive)) {
1990                         debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %ld bytes sent.", w->id, w->response.sent);
1991                         WEB_CLIENT_IS_DEAD(w);
1992                         return t;
1993                 }
1994
1995                 // reset the client
1996                 web_client_reset(w);
1997                 debug(D_WEB_CLIENT, "%llu: Done sending all data on socket.", w->id);
1998                 return t;
1999         }
2000
2001         if(w->response.zhave == w->response.zsent) {
2002                 // compress more input data
2003
2004                 // close the previous open chunk
2005                 if(w->response.sent != 0) {
2006                         t = web_client_send_chunk_close(w);
2007                         if(t < 0) return t;
2008                 }
2009
2010                 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);
2011
2012                 // give the compressor all the data not passed through the compressor yet
2013                 if(w->response.data->len > w->response.sent) {
2014                         w->response.zstream.next_in = (Bytef *)&w->response.data->buffer[w->response.sent - w->response.zstream.avail_in];
2015                         w->response.zstream.avail_in += (uInt) (w->response.data->len - w->response.sent);
2016                 }
2017
2018                 // reset the compressor output buffer
2019                 w->response.zstream.next_out = w->response.zbuffer;
2020                 w->response.zstream.avail_out = ZLIB_CHUNK;
2021
2022                 // ask for FINISH if we have all the input
2023                 int flush = Z_SYNC_FLUSH;
2024                 if(w->mode == WEB_CLIENT_MODE_NORMAL
2025                         || (w->mode == WEB_CLIENT_MODE_FILECOPY && !w->wait_receive && w->response.data->len == w->response.rlen)) {
2026                         flush = Z_FINISH;
2027                         debug(D_DEFLATE, "%llu: Requesting Z_FINISH, if possible.", w->id);
2028                 }
2029                 else {
2030                         debug(D_DEFLATE, "%llu: Requesting Z_SYNC_FLUSH.", w->id);
2031                 }
2032
2033                 // compress
2034                 if(deflate(&w->response.zstream, flush) == Z_STREAM_ERROR) {
2035                         error("%llu: Compression failed. Closing down client.", w->id);
2036                         web_client_reset(w);
2037                         return(-1);
2038                 }
2039
2040                 w->response.zhave = ZLIB_CHUNK - w->response.zstream.avail_out;
2041                 w->response.zsent = 0;
2042
2043                 // keep track of the bytes passed through the compressor
2044                 w->response.sent = w->response.data->len;
2045
2046                 debug(D_DEFLATE, "%llu: Compression produced %d bytes.", w->id, w->response.zhave);
2047
2048                 // open a new chunk
2049                 ssize_t t2 = web_client_send_chunk_header(w, w->response.zhave);
2050                 if(t2 < 0) return t2;
2051                 t += t2;
2052         }
2053
2054         debug(D_WEB_CLIENT, "%llu: Sending %d bytes of data (+%d of chunk header).", w->id, w->response.zhave - w->response.zsent, t);
2055
2056         len = send(w->ofd, &w->response.zbuffer[w->response.zsent], (size_t) (w->response.zhave - w->response.zsent), MSG_DONTWAIT);
2057         if(len > 0) {
2058                 w->stats_sent_bytes += len;
2059                 w->response.zsent += len;
2060                 len += t;
2061                 debug(D_WEB_CLIENT, "%llu: Sent %d bytes.", w->id, len);
2062         }
2063         else if(len == 0) {
2064                 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);
2065                 WEB_CLIENT_IS_DEAD(w);
2066         }
2067         else {
2068                 debug(D_WEB_CLIENT, "%llu: Failed to send data to client.", w->id);
2069                 WEB_CLIENT_IS_DEAD(w);
2070         }
2071
2072         return(len);
2073 }
2074 #endif // NETDATA_WITH_ZLIB
2075
2076 ssize_t web_client_send(struct web_client *w) {
2077 #ifdef NETDATA_WITH_ZLIB
2078         if(likely(w->response.zoutput)) return web_client_send_deflate(w);
2079 #endif // NETDATA_WITH_ZLIB
2080
2081         ssize_t bytes;
2082
2083         if(unlikely(w->response.data->len - w->response.sent == 0)) {
2084                 // there is nothing to send
2085
2086                 debug(D_WEB_CLIENT, "%llu: Out of output data.", w->id);
2087
2088                 // there can be two cases for this
2089                 // A. we have done everything
2090                 // B. we temporarily have nothing to send, waiting for the buffer to be filled by ifd
2091
2092                 if(w->mode == WEB_CLIENT_MODE_FILECOPY && w->wait_receive && w->response.rlen && w->response.rlen > w->response.data->len) {
2093                         // we have to wait, more data will come
2094                         debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
2095                         w->wait_send = 0;
2096                         return 0;
2097                 }
2098
2099                 if(unlikely(!w->keepalive)) {
2100                         debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %ld bytes sent.", w->id, w->response.sent);
2101                         WEB_CLIENT_IS_DEAD(w);
2102                         return 0;
2103                 }
2104
2105                 web_client_reset(w);
2106                 debug(D_WEB_CLIENT, "%llu: Done sending all data on socket. Waiting for next request on the same socket.", w->id);
2107                 return 0;
2108         }
2109
2110         bytes = send(w->ofd, &w->response.data->buffer[w->response.sent], w->response.data->len - w->response.sent, MSG_DONTWAIT);
2111         if(likely(bytes > 0)) {
2112                 w->stats_sent_bytes += bytes;
2113                 w->response.sent += bytes;
2114                 debug(D_WEB_CLIENT, "%llu: Sent %d bytes.", w->id, bytes);
2115         }
2116         else if(likely(bytes == 0)) {
2117                 debug(D_WEB_CLIENT, "%llu: Did not send any bytes to the client.", w->id);
2118                 WEB_CLIENT_IS_DEAD(w);
2119         }
2120         else {
2121                 debug(D_WEB_CLIENT, "%llu: Failed to send data to client.", w->id);
2122                 WEB_CLIENT_IS_DEAD(w);
2123         }
2124
2125         return(bytes);
2126 }
2127
2128 ssize_t web_client_receive(struct web_client *w)
2129 {
2130         // do we have any space for more data?
2131         buffer_need_bytes(w->response.data, WEB_REQUEST_LENGTH);
2132
2133         ssize_t left = w->response.data->size - w->response.data->len;
2134         ssize_t bytes;
2135
2136         if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY))
2137                 bytes = read(w->ifd, &w->response.data->buffer[w->response.data->len], (size_t) (left - 1));
2138         else
2139                 bytes = recv(w->ifd, &w->response.data->buffer[w->response.data->len], (size_t) (left - 1), MSG_DONTWAIT);
2140
2141         if(likely(bytes > 0)) {
2142                 if(w->mode != WEB_CLIENT_MODE_FILECOPY)
2143                         w->stats_received_bytes += bytes;
2144
2145                 size_t old = w->response.data->len;
2146                 w->response.data->len += bytes;
2147                 w->response.data->buffer[w->response.data->len] = '\0';
2148
2149                 debug(D_WEB_CLIENT, "%llu: Received %d bytes.", w->id, bytes);
2150                 debug(D_WEB_DATA, "%llu: Received data: '%s'.", w->id, &w->response.data->buffer[old]);
2151
2152                 if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
2153                         w->wait_send = 1;
2154
2155                         if(w->response.rlen && w->response.data->len >= w->response.rlen)
2156                                 w->wait_receive = 0;
2157                 }
2158         }
2159         else if(likely(bytes == 0)) {
2160                 debug(D_WEB_CLIENT, "%llu: Out of input data.", w->id);
2161
2162                 // if we cannot read, it means we have an error on input.
2163                 // if however, we are copying a file from ifd to ofd, we should not return an error.
2164                 // in this case, the error should be generated when the file has been sent to the client.
2165
2166                 if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
2167                         // we are copying data from ifd to ofd
2168                         // let it finish copying...
2169                         w->wait_receive = 0;
2170
2171                         debug(D_WEB_CLIENT, "%llu: Read the whole file.", w->id);
2172                         if(w->ifd != w->ofd) close(w->ifd);
2173                         w->ifd = w->ofd;
2174                 }
2175                 else {
2176                         debug(D_WEB_CLIENT, "%llu: failed to receive data.", w->id);
2177                         WEB_CLIENT_IS_DEAD(w);
2178                 }
2179         }
2180         else {
2181                 debug(D_WEB_CLIENT, "%llu: receive data failed.", w->id);
2182                 WEB_CLIENT_IS_DEAD(w);
2183         }
2184
2185         return(bytes);
2186 }
2187
2188
2189 // --------------------------------------------------------------------------------------
2190 // the thread of a single client
2191
2192 // 1. waits for input and output, using async I/O
2193 // 2. it processes HTTP requests
2194 // 3. it generates HTTP responses
2195 // 4. it copies data from input to output if mode is FILECOPY
2196
2197 void *web_client_main(void *ptr)
2198 {
2199         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
2200                 error("Cannot set pthread cancel type to DEFERRED.");
2201
2202         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
2203                 error("Cannot set pthread cancel state to ENABLE.");
2204
2205         struct web_client *w = ptr;
2206         struct pollfd fds[2], *ifd, *ofd;
2207         int retval, fdmax = 0, timeout;
2208
2209         log_access("%llu: %s port %s connected on thread task id %d", w->id, w->client_ip, w->client_port, gettid());
2210
2211         for(;;) {
2212                 if(unlikely(w->dead)) {
2213                         debug(D_WEB_CLIENT, "%llu: client is dead.", w->id);
2214                         break;
2215                 }
2216                 else if(unlikely(!w->wait_receive && !w->wait_send)) {
2217                         debug(D_WEB_CLIENT, "%llu: client is not set for neither receiving nor sending data.");
2218                         break;
2219                 }
2220
2221                 if(unlikely(w->ifd < 0 || w->ofd < 0)) {
2222                         error("%llu: invalid file descriptor, ifd = %d, ofd = %d (required 0 <= fd", w->id, w->ifd, w->ofd);
2223                         break;
2224                 }
2225
2226                 if(w->ifd == w->ofd) {
2227                         fds[0].fd = w->ifd;
2228                         fds[0].events = 0;
2229                         fds[0].revents = 0;
2230
2231                         if(w->wait_receive) fds[0].events |= POLLIN;
2232                         if(w->wait_send)    fds[0].events |= POLLOUT;
2233
2234                         fds[1].fd = -1;
2235                         fds[1].events = 0;
2236                         fds[1].revents = 0;
2237
2238                         ifd = ofd = &fds[0];
2239
2240                         fdmax = 1;
2241                 }
2242                 else {
2243                         fds[0].fd = w->ifd;
2244                         fds[0].events = 0;
2245                         fds[0].revents = 0;
2246                         if(w->wait_receive) fds[0].events |= POLLIN;
2247                         ifd = &fds[0];
2248
2249                         fds[1].fd = w->ofd;
2250                         fds[1].events = 0;
2251                         fds[1].revents = 0;
2252                         if(w->wait_send)    fds[1].events |= POLLOUT;
2253                         ofd = &fds[1];
2254
2255                         fdmax = 2;
2256                 }
2257
2258                 debug(D_WEB_CLIENT, "%llu: Waiting socket async I/O for %s %s", w->id, w->wait_receive?"INPUT":"", w->wait_send?"OUTPUT":"");
2259                 errno = 0;
2260                 timeout = web_client_timeout * 1000;
2261                 retval = poll(fds, fdmax, timeout);
2262
2263                 if(unlikely(retval == -1)) {
2264                         if(errno == EAGAIN || errno == EINTR) {
2265                                 debug(D_WEB_CLIENT, "%llu: EAGAIN received.", w->id);
2266                                 continue;
2267                         }
2268
2269                         debug(D_WEB_CLIENT, "%llu: LISTENER: poll() failed (input fd = %d, output fd = %d). Closing client.", w->id, w->ifd, w->ofd);
2270                         break;
2271                 }
2272                 else if(unlikely(!retval)) {
2273                         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":"");
2274                         break;
2275                 }
2276
2277                 int used = 0;
2278                 if(w->wait_send && ofd->revents & POLLOUT) {
2279                         used++;
2280                         if(web_client_send(w) < 0) {
2281                                 debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
2282                                 break;
2283                         }
2284                 }
2285
2286                 if(w->wait_receive && (ifd->revents & POLLIN || ifd->revents & POLLPRI)) {
2287                         used++;
2288                         if(web_client_receive(w) < 0) {
2289                                 debug(D_WEB_CLIENT, "%llu: Cannot receive data from client. Closing client.", w->id);
2290                                 break;
2291                         }
2292
2293                         if(w->mode == WEB_CLIENT_MODE_NORMAL) {
2294                                 debug(D_WEB_CLIENT, "%llu: Attempting to process received data.", w->id);
2295                                 web_client_process(w);
2296                         }
2297                 }
2298
2299                 if(unlikely(!used)) {
2300                         debug(D_WEB_CLIENT_ACCESS, "%llu: Received error on socket.", w->id);
2301                         break;
2302                 }
2303         }
2304
2305         web_client_reset(w);
2306
2307         log_access("%llu: %s port %s disconnected from thread task id %d", w->id, w->client_ip, w->client_port, gettid());
2308         debug(D_WEB_CLIENT, "%llu: done...", w->id);
2309
2310         // close the sockets/files now
2311         // to free file descriptors
2312         if(w->ifd == w->ofd) {
2313                 if(w->ifd != -1) close(w->ifd);
2314         }
2315         else {
2316                 if(w->ifd != -1) close(w->ifd);
2317                 if(w->ofd != -1) close(w->ofd);
2318         }
2319         w->ifd = -1;
2320         w->ofd = -1;
2321
2322         w->obsolete = 1;
2323
2324         pthread_exit(NULL);
2325         return NULL;
2326 }