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 <netinet/tcp.h>
  15 #include <malloc.h>
  16 #include <pwd.h>
  17 #include <ctype.h>
  18
  19 #include "common.h"
  20 #include "log.h"
  21 #include "appconfig.h"
  22 #include "url.h"
  23 #include "web_buffer.h"
  24 #include "web_server.h"
  25 #include "global_statistics.h"
  26 #include "rrd.h"
  27 #include "rrd2json.h"
  28
  29 #include "web_client.h"
  30
  31 #define INITIAL_WEB_DATA_LENGTH 16384
  32 #define WEB_REQUEST_LENGTH 16384
  33
  34 int web_client_timeout = DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS;
  35 int web_enable_gzip = 1;
  36
  37 extern int netdata_exit;
  38
  39 struct web_client *web_clients = NULL;
  40 unsigned long long web_clients_count = 0;
  41
  42 struct web_client *web_client_create(int listener)
  43 {
  44         struct web_client *w;
  45
  46         w = calloc(1, sizeof(struct web_client));
  47         if(!w) {
  48                 error("Cannot allocate new web_client memory.");
  49                 return NULL;
  50         }
  51
  52         w->id = ++web_clients_count;
  53         w->mode = WEB_CLIENT_MODE_NORMAL;
  54
  55         {
  56                 struct sockaddr *sadr;
  57                 socklen_t addrlen;
  58
  59                 sadr = (struct sockaddr*) &w->clientaddr;
  60                 addrlen = sizeof(w->clientaddr);
  61
  62                 w->ifd = accept(listener, sadr, &addrlen);
  63                 if (w->ifd == -1) {
  64                         error("%llu: Cannot accept new incoming connection.", w->id);
  65                         free(w);
  66                         return NULL;
  67                 }
  68                 w->ofd = w->ifd;
  69
  70                 if(getnameinfo(sadr, addrlen, w->client_ip, NI_MAXHOST, w->client_port, NI_MAXSERV, NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
  71                         error("Cannot getnameinfo() on received client connection.");
  72                         strncpy(w->client_ip,   "UNKNOWN", NI_MAXHOST);
  73                         strncpy(w->client_port, "UNKNOWN", NI_MAXSERV);
  74                 }
  75                 w->client_ip[NI_MAXHOST]   = '\0';
  76                 w->client_port[NI_MAXSERV] = '\0';
  77
  78                 switch(sadr->sa_family) {
  79
  80                 case AF_INET:
  81                         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);
  82                         break;
  83
  84                 case AF_INET6:
  85                         if(strncmp(w->client_ip, "::ffff:", 7) == 0) {
  86                                 strcpy(w->client_ip, &w->client_ip[7]);
  87                                 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);
  88                         }
  89                         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);
  90                         break;
  91
  92                 default:
  93                         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);
  94                         break;
  95                 }
  96
  97                 int flag = 1;
  98                 if(setsockopt(w->ifd, SOL_SOCKET, SO_KEEPALIVE, (char *) &flag, sizeof(int)) != 0) error("%llu: Cannot set SO_KEEPALIVE on socket.", w->id);
  99         }
 100
 101         w->response.data = buffer_create(INITIAL_WEB_DATA_LENGTH);
 102         if(unlikely(!w->response.data)) {
 103                 // no need for error log - web_buffer_create already logged the error
 104                 close(w->ifd);
 105                 free(w);
 106                 return NULL;
 107         }
 108
 109         w->response.header = buffer_create(HTTP_RESPONSE_HEADER_SIZE);
 110         if(unlikely(!w->response.header)) {
 111                 // no need for error log - web_buffer_create already logged the error
 112                 buffer_free(w->response.data);
 113                 close(w->ifd);
 114                 free(w);
 115                 return NULL;
 116         }
 117
 118         w->response.header_output = buffer_create(HTTP_RESPONSE_HEADER_SIZE);
 119         if(unlikely(!w->response.header_output)) {
 120                 // no need for error log - web_buffer_create already logged the error
 121                 buffer_free(w->response.header);
 122                 buffer_free(w->response.data);
 123                 close(w->ifd);
 124                 free(w);
 125                 return NULL;
 126         }
 127
 128         w->wait_receive = 1;
 129
 130         if(web_clients) web_clients->prev = w;
 131         w->next = web_clients;
 132         web_clients = w;
 133
 134         global_statistics.connected_clients++;
 135
 136         return(w);
 137 }
 138
 139 void web_client_reset(struct web_client *w)
 140 {
 141         struct timeval tv;
 142         gettimeofday(&tv, NULL);
 143
 144         long sent = (w->mode == WEB_CLIENT_MODE_FILECOPY)?w->response.rlen:w->response.data->len;
 145
 146 #ifdef NETDATA_WITH_ZLIB
 147         if(likely(w->response.zoutput)) sent = (long)w->response.zstream.total_out;
 148 #endif
 149
 150         long size = (w->mode == WEB_CLIENT_MODE_FILECOPY)?w->response.rlen:w->response.data->len;
 151
 152         if(likely(w->last_url[0]))
 153                 log_access("%llu: (sent/all = %ld/%ld bytes %0.0f%%, prep/sent/total = %0.2f/%0.2f/%0.2f ms) %s: %d '%s'",
 154                         w->id,
 155                         sent, size, -((size>0)?((float)(size-sent)/(float)size * 100.0):0.0),
 156                         (float)usecdiff(&w->tv_ready, &w->tv_in) / 1000.0,
 157                         (float)usecdiff(&tv, &w->tv_ready) / 1000.0,
 158                         (float)usecdiff(&tv, &w->tv_in) / 1000.0,
 159                         (w->mode == WEB_CLIENT_MODE_FILECOPY)?"filecopy":"data",
 160                         w->response.code,
 161                         w->last_url
 162                 );
 163
 164         debug(D_WEB_CLIENT, "%llu: Reseting client.", w->id);
 165
 166         if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY)) {
 167                 debug(D_WEB_CLIENT, "%llu: Closing filecopy input file.", w->id);
 168                 close(w->ifd);
 169                 w->ifd = w->ofd;
 170         }
 171
 172         w->last_url[0] = '\0';
 173
 174         w->mode = WEB_CLIENT_MODE_NORMAL;
 175
 176         buffer_reset(w->response.header_output);
 177         buffer_reset(w->response.header);
 178         buffer_reset(w->response.data);
 179         w->response.rlen = 0;
 180         w->response.sent = 0;
 181         w->response.code = 0;
 182
 183         w->wait_receive = 1;
 184         w->wait_send = 0;
 185
 186         w->response.zoutput = 0;
 187
 188         // if we had enabled compression, release it
 189 #ifdef NETDATA_WITH_ZLIB
 190         if(w->response.zinitialized) {
 191                 debug(D_DEFLATE, "%llu: Reseting compression.", w->id);
 192                 deflateEnd(&w->response.zstream);
 193                 w->response.zsent = 0;
 194                 w->response.zhave = 0;
 195                 w->response.zstream.avail_in = 0;
 196                 w->response.zstream.avail_out = 0;
 197                 w->response.zstream.total_in = 0;
 198                 w->response.zstream.total_out = 0;
 199                 w->response.zinitialized = 0;
 200         }
 201 #endif // NETDATA_WITH_ZLIB
 202 }
 203
 204 struct web_client *web_client_free(struct web_client *w)
 205 {
 206         struct web_client *n = w->next;
 207
 208         debug(D_WEB_CLIENT_ACCESS, "%llu: Closing web client from %s port %s.", w->id, w->client_ip, w->client_port);
 209
 210         if(w->prev)     w->prev->next = w->next;
 211         if(w->next) w->next->prev = w->prev;
 212
 213         if(w == web_clients) web_clients = w->next;
 214
 215         if(w->response.header_output) buffer_free(w->response.header_output);
 216         if(w->response.header) buffer_free(w->response.header);
 217         if(w->response.data) buffer_free(w->response.data);
 218         close(w->ifd);
 219         if(w->ofd != w->ifd) close(w->ofd);
 220         free(w);
 221
 222         global_statistics.connected_clients--;
 223
 224         return(n);
 225 }
 226
 227 uid_t web_files_uid(void)
 228 {
 229         static char *web_owner = NULL;
 230         static uid_t owner_uid = 0;
 231
 232         if(unlikely(!web_owner)) {
 233                 web_owner = config_get("global", "web files owner", NETDATA_USER);
 234                 if(!web_owner || !*web_owner)
 235                         owner_uid = geteuid();
 236                 else {
 237                         struct passwd *pw = getpwnam(web_owner);
 238                         if(!pw) {
 239                                 error("User %s is not present. Ignoring option.", web_owner);
 240                                 owner_uid = geteuid();
 241                         }
 242                         else {
 243                                 debug(D_WEB_CLIENT, "Web files owner set to %s.\n", web_owner);
 244                                 owner_uid = pw->pw_uid;
 245                         }
 246                 }
 247         }
 248
 249         return(owner_uid);
 250 }
 251
 252 int mysendfile(struct web_client *w, char *filename)
 253 {
 254         static char *web_dir = NULL;
 255
 256         // initialize our static data
 257         if(unlikely(!web_dir)) web_dir = config_get("global", "web files directory", WEB_DIR);
 258
 259         debug(D_WEB_CLIENT, "%llu: Looking for file '%s/%s'", w->id, web_dir, filename);
 260
 261         // skip leading slashes
 262         while (*filename == '/') filename++;
 263
 264         // if the filename contain known paths, skip them
 265         if(strncmp(filename, WEB_PATH_FILE "/", strlen(WEB_PATH_FILE) + 1) == 0) filename = &filename[strlen(WEB_PATH_FILE) + 1];
 266
 267         char *s;
 268         for(s = filename; *s ;s++) {
 269                 if( !isalnum(*s) && *s != '/' && *s != '.' && *s != '-' && *s != '_') {
 270                         debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not acceptable.", w->id, filename);
 271                         buffer_sprintf(w->response.data, "File '%s' cannot be served. Filename contains invalid character '%c'", *s);
 272                         return 400;
 273                 }
 274         }
 275
 276         // if the filename contains a .. refuse to serve it
 277         if(strstr(filename, "..") != 0) {
 278                 debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not acceptable.", w->id, filename);
 279                 buffer_sprintf(w->response.data, "File '%s' cannot be served. Relative filenames with '..' in them are not supported.", filename);
 280                 return 400;
 281         }
 282
 283         // access the file
 284         char webfilename[FILENAME_MAX + 1];
 285         snprintf(webfilename, FILENAME_MAX, "%s/%s", web_dir, filename);
 286
 287         // check if the file exists
 288         struct stat stat;
 289         if(lstat(webfilename, &stat) != 0) {
 290                 debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not found.", w->id, webfilename);
 291                 buffer_sprintf(w->response.data, "File '%s' does not exist, or is not accessible.", filename);
 292                 return 404;
 293         }
 294
 295         // check if the file is owned by us
 296         if(stat.st_uid != web_files_uid()) {
 297                 debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is owned by user %d (I run as user %d). Access Denied.", w->id, webfilename, stat.st_uid, getuid());
 298                 buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", filename);
 299                 return 403;
 300         }
 301
 302         if((stat.st_mode & S_IFMT) == S_IFDIR) {
 303                 snprintf(webfilename, FILENAME_MAX+1, "%s/index.html", filename);
 304                 return mysendfile(w, webfilename);
 305         }
 306
 307         if((stat.st_mode & S_IFMT) != S_IFREG) {
 308                 debug(D_WEB_CLIENT_ACCESS, "%llu: File '%s' is not a regular file. Access Denied.", w->id, webfilename);
 309                 buffer_sprintf(w->response.data, "Access to file '%s' is not permitted.", filename);
 310                 return 403;
 311         }
 312
 313         // open the file
 314         w->ifd = open(webfilename, O_NONBLOCK, O_RDONLY);
 315         if(w->ifd == -1) {
 316                 w->ifd = w->ofd;
 317
 318                 if(errno == EBUSY || errno == EAGAIN) {
 319                         error("%llu: File '%s' is busy, sending 307 Moved Temporarily to force retry.", w->id, webfilename);
 320                         buffer_sprintf(w->response.header, "Location: /" WEB_PATH_FILE "/%s\r\n", filename);
 321                         buffer_sprintf(w->response.data, "The file '%s' is currently busy. Please try again later.", filename);
 322                         return 307;
 323                 }
 324                 else {
 325                         error("%llu: Cannot open file '%s'.", w->id, webfilename);
 326                         buffer_sprintf(w->response.data, "Cannot open file '%s'.", filename);
 327                         return 404;
 328                 }
 329         }
 330
 331         // pick a Content-Type for the file
 332                  if(strstr(filename, ".html") != NULL)  w->response.data->contenttype = CT_TEXT_HTML;
 333         else if(strstr(filename, ".js")   != NULL)      w->response.data->contenttype = CT_APPLICATION_X_JAVASCRIPT;
 334         else if(strstr(filename, ".css")  != NULL)      w->response.data->contenttype = CT_TEXT_CSS;
 335         else if(strstr(filename, ".xml")  != NULL)      w->response.data->contenttype = CT_TEXT_XML;
 336         else if(strstr(filename, ".xsl")  != NULL)      w->response.data->contenttype = CT_TEXT_XSL;
 337         else if(strstr(filename, ".txt")  != NULL)  w->response.data->contenttype = CT_TEXT_PLAIN;
 338         else if(strstr(filename, ".svg")  != NULL)  w->response.data->contenttype = CT_IMAGE_SVG_XML;
 339         else if(strstr(filename, ".ttf")  != NULL)  w->response.data->contenttype = CT_APPLICATION_X_FONT_TRUETYPE;
 340         else if(strstr(filename, ".otf")  != NULL)  w->response.data->contenttype = CT_APPLICATION_X_FONT_OPENTYPE;
 341         else if(strstr(filename, ".woff2")!= NULL)  w->response.data->contenttype = CT_APPLICATION_FONT_WOFF2;
 342         else if(strstr(filename, ".woff") != NULL)  w->response.data->contenttype = CT_APPLICATION_FONT_WOFF;
 343         else if(strstr(filename, ".eot")  != NULL)  w->response.data->contenttype = CT_APPLICATION_VND_MS_FONTOBJ;
 344         else w->response.data->contenttype = CT_APPLICATION_OCTET_STREAM;
 345
 346         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);
 347
 348         w->mode = WEB_CLIENT_MODE_FILECOPY;
 349         w->wait_receive = 1;
 350         w->wait_send = 0;
 351         buffer_flush(w->response.data);
 352         w->response.rlen = stat.st_size;
 353         w->response.data->date = stat.st_mtim.tv_sec;
 354
 355         return 200;
 356 }
 357
 358
 359 #ifdef NETDATA_WITH_ZLIB
 360 void web_client_enable_deflate(struct web_client *w) {
 361         if(w->response.zinitialized == 1) {
 362                 error("%llu: Compression has already be initialized for this client.", w->id);
 363                 return;
 364         }
 365
 366         if(w->response.sent) {
 367                 error("%llu: Cannot enable compression in the middle of a conversation.", w->id);
 368                 return;
 369         }
 370
 371         w->response.zstream.zalloc = Z_NULL;
 372         w->response.zstream.zfree = Z_NULL;
 373         w->response.zstream.opaque = Z_NULL;
 374
 375         w->response.zstream.next_in = (Bytef *)w->response.data->buffer;
 376         w->response.zstream.avail_in = 0;
 377         w->response.zstream.total_in = 0;
 378
 379         w->response.zstream.next_out = w->response.zbuffer;
 380         w->response.zstream.avail_out = 0;
 381         w->response.zstream.total_out = 0;
 382
 383         w->response.zstream.zalloc = Z_NULL;
 384         w->response.zstream.zfree = Z_NULL;
 385         w->response.zstream.opaque = Z_NULL;
 386
 387 //      if(deflateInit(&w->response.zstream, Z_DEFAULT_COMPRESSION) != Z_OK) {
 388 //              error("%llu: Failed to initialize zlib. Proceeding without compression.", w->id);
 389 //              return;
 390 //      }
 391
 392         // Select GZIP compression: windowbits = 15 + 16 = 31
 393         if(deflateInit2(&w->response.zstream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 31, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
 394                 error("%llu: Failed to initialize zlib. Proceeding without compression.", w->id);
 395                 return;
 396         }
 397
 398         w->response.zsent = 0;
 399         w->response.zoutput = 1;
 400         w->response.zinitialized = 1;
 401
 402         debug(D_DEFLATE, "%llu: Initialized compression.", w->id);
 403 }
 404 #endif // NETDATA_WITH_ZLIB
 405
 406 uint32_t web_client_api_request_v1_data_options(char *o)
 407 {
 408         uint32_t ret = 0x00000000;
 409         char *tok;
 410
 411         while(o && *o && (tok = mystrsep(&o, ", |"))) {
 412                 if(!*tok) continue;
 413
 414                 if(!strcmp(tok, "nonzero"))
 415                         ret |= RRDR_OPTION_NONZERO;
 416                 else if(!strcmp(tok, "flip") || !strcmp(tok, "reversed") || !strcmp(tok, "reverse"))
 417                         ret |= RRDR_OPTION_REVERSED;
 418                 else if(!strcmp(tok, "jsonwrap"))
 419                         ret |= RRDR_OPTION_JSON_WRAP;
 420                 else if(!strcmp(tok, "min2max"))
 421                         ret |= RRDR_OPTION_MIN2MAX;
 422                 else if(!strcmp(tok, "ms") || !strcmp(tok, "milliseconds"))
 423                         ret |= RRDR_OPTION_MILLISECONDS;
 424                 else if(!strcmp(tok, "abs") || !strcmp(tok, "absolute") || !strcmp(tok, "absolute_sum") || !strcmp(tok, "absolute-sum"))
 425                         ret |= RRDR_OPTION_ABSOLUTE;
 426                 else if(!strcmp(tok, "seconds"))
 427                         ret |= RRDR_OPTION_SECONDS;
 428                 else if(!strcmp(tok, "null2zero"))
 429                         ret |= RRDR_OPTION_NULL2ZERO;
 430                 else if(!strcmp(tok, "objectrows"))
 431                         ret |= RRDR_OPTION_OBJECTSROWS;
 432                 else if(!strcmp(tok, "google_json"))
 433                         ret |= RRDR_OPTION_GOOGLE_JSON;
 434         }
 435
 436         return ret;
 437 }
 438
 439 uint32_t web_client_api_request_v1_data_format(char *name)
 440 {
 441         if(!strcmp(name, DATASOURCE_FORMAT_DATATABLE_JSON)) // datatable
 442                 return DATASOURCE_DATATABLE_JSON;
 443
 444         else if(!strcmp(name, DATASOURCE_FORMAT_DATATABLE_JSONP)) // datasource
 445                 return DATASOURCE_DATATABLE_JSONP;
 446
 447         else if(!strcmp(name, DATASOURCE_FORMAT_JSON)) // json
 448                 return DATASOURCE_JSON;
 449
 450         else if(!strcmp(name, DATASOURCE_FORMAT_JSONP)) // jsonp
 451                 return DATASOURCE_JSONP;
 452
 453         else if(!strcmp(name, DATASOURCE_FORMAT_SSV)) // ssv
 454                 return DATASOURCE_SSV;
 455
 456         else if(!strcmp(name, DATASOURCE_FORMAT_CSV)) // csv
 457                 return DATASOURCE_CSV;
 458
 459         else if(!strcmp(name, DATASOURCE_FORMAT_TSV) || !strcmp(name, "tsv-excel")) // tsv
 460                 return DATASOURCE_TSV;
 461
 462         else if(!strcmp(name, DATASOURCE_FORMAT_HTML)) // html
 463                 return DATASOURCE_HTML;
 464
 465         else if(!strcmp(name, DATASOURCE_FORMAT_JS_ARRAY)) // array
 466                 return DATASOURCE_JS_ARRAY;
 467
 468         else if(!strcmp(name, DATASOURCE_FORMAT_SSV_COMMA)) // ssvcomma
 469                 return DATASOURCE_SSV_COMMA;
 470
 471         return DATASOURCE_JSON;
 472 }
 473
 474 uint32_t web_client_api_request_v1_data_google_format(char *name)
 475 {
 476         if(!strcmp(name, "json"))
 477                 return DATASOURCE_DATATABLE_JSONP;
 478
 479         else if(!strcmp(name, "html"))
 480                 return DATASOURCE_HTML;
 481
 482         else if(!strcmp(name, "csv"))
 483                 return DATASOURCE_CSV;
 484
 485         else if(!strcmp(name, "tsv-excel"))
 486                 return DATASOURCE_TSV;
 487
 488         return DATASOURCE_JSON;
 489 }
 490
 491 int web_client_api_request_v1_data_group(char *name)
 492 {
 493         if(!strcmp(name, "max"))
 494                 return GROUP_MAX;
 495
 496         else if(!strcmp(name, "average"))
 497                 return GROUP_AVERAGE;
 498
 499         return GROUP_MAX;
 500 }
 501
 502 int web_client_api_request_v1_charts(struct web_client *w, char *url)
 503 {
 504         if(url) { ; }
 505
 506         buffer_flush(w->response.data);
 507         w->response.data->contenttype = CT_APPLICATION_JSON;
 508         rrd_stats_api_v1_charts(w->response.data);
 509         return 200;
 510 }
 511
 512 int web_client_api_request_v1_chart(struct web_client *w, char *url)
 513 {
 514         int ret = 400;
 515         char *chart = NULL;
 516
 517         buffer_flush(w->response.data);
 518
 519         while(url) {
 520                 char *value = mystrsep(&url, "?&[]");
 521                 if(!value || !*value) continue;
 522
 523                 char *name = mystrsep(&value, "=");
 524                 if(!name || !*name) continue;
 525                 if(!value || !*value) continue;
 526
 527                 // name and value are now the parameters
 528                 // they are not null and not empty
 529
 530                 if(!strcmp(name, "chart")) chart = value;
 531                 //else {
 532                 ///     buffer_sprintf(w->response.data, "Unknown parameter '%s' in request.", name);
 533                 //      goto cleanup;
 534                 //}
 535         }
 536
 537         if(!chart || !*chart) {
 538                 buffer_sprintf(w->response.data, "No chart id is given at the request.");
 539                 goto cleanup;
 540         }
 541
 542         RRDSET *st = rrdset_find(chart);
 543         if(!st) st = rrdset_find_byname(chart);
 544         if(!st) {
 545                 buffer_sprintf(w->response.data, "Chart '%s' is not found.", chart);
 546                 ret = 404;
 547                 goto cleanup;
 548         }
 549
 550         w->response.data->contenttype = CT_APPLICATION_JSON;
 551         rrd_stats_api_v1_chart(st, w->response.data);
 552         return 200;
 553
 554 cleanup:
 555         return ret;
 556 }
 557
 558 // returns the HTTP code
 559 int web_client_api_request_v1_data(struct web_client *w, char *url)
 560 {
 561         debug(D_WEB_CLIENT, "%llu: API v1 data with URL '%s'", w->id, url);
 562
 563         int ret = 400;
 564         BUFFER *dimensions = NULL;
 565
 566         buffer_flush(w->response.data);
 567
 568         char    *google_version = "0.6",
 569                         *google_reqId = "0",
 570                         *google_sig = "0",
 571                         *google_out = "json",
 572                         *responseHandler = NULL,
 573                         *outFileName = NULL;
 574
 575         time_t last_timestamp_in_data = 0, google_timestamp = 0;
 576
 577         char *chart = NULL
 578                         , *before_str = NULL
 579                         , *after_str = NULL
 580                         , *points_str = NULL;
 581
 582         int group = GROUP_MAX;
 583         uint32_t format = DATASOURCE_JSON;
 584         uint32_t options = 0x00000000;
 585
 586         while(url) {
 587                 char *value = mystrsep(&url, "?&[]");
 588                 if(!value || !*value) continue;
 589
 590                 char *name = mystrsep(&value, "=");
 591                 if(!name || !*name) continue;
 592                 if(!value || !*value) continue;
 593
 594                 debug(D_WEB_CLIENT, "%llu: API v1 query param '%s' with value '%s'", w->id, name, value);
 595
 596                 // name and value are now the parameters
 597                 // they are not null and not empty
 598
 599                 if(!strcmp(name, "chart")) chart = value;
 600                 else if(!strcmp(name, "dimension") || !strcmp(name, "dim") || !strcmp(name, "dimensions") || !strcmp(name, "dims")) {
 601                         if(!dimensions) dimensions = buffer_create(strlen(value));
 602                         if(dimensions) {
 603                                 buffer_strcat(dimensions, "|");
 604                                 buffer_strcat(dimensions, value);
 605                         }
 606                 }
 607                 else if(!strcmp(name, "after")) after_str = value;
 608                 else if(!strcmp(name, "before")) before_str = value;
 609                 else if(!strcmp(name, "points")) points_str = value;
 610                 else if(!strcmp(name, "group")) {
 611                         group = web_client_api_request_v1_data_group(value);
 612                 }
 613                 else if(!strcmp(name, "format")) {
 614                         format = web_client_api_request_v1_data_format(value);
 615                 }
 616                 else if(!strcmp(name, "options")) {
 617                         options |= web_client_api_request_v1_data_options(value);
 618                 }
 619                 else if(!strcmp(name, "callback")) {
 620                         responseHandler = value;
 621                 }
 622                 else if(!strcmp(name, "filename")) {
 623                         outFileName = value;
 624                 }
 625                 else if(!strcmp(name, "tqx")) {
 626                         // parse Google Visualization API options
 627                         // https://developers.google.com/chart/interactive/docs/dev/implementing_data_source
 628                         char *tqx_name, *tqx_value;
 629
 630                         while(value) {
 631                                 tqx_value = mystrsep(&value, ";");
 632                                 if(!tqx_value || !*tqx_value) continue;
 633
 634                                 tqx_name = mystrsep(&tqx_value, ":");
 635                                 if(!tqx_name || !*tqx_name) continue;
 636                                 if(!tqx_value || !*tqx_value) continue;
 637
 638                                 if(!strcmp(tqx_name, "version"))
 639                                         google_version = tqx_value;
 640                                 else if(!strcmp(tqx_name, "reqId"))
 641                                         google_reqId = tqx_value;
 642                                 else if(!strcmp(tqx_name, "sig")) {
 643                                         google_sig = tqx_value;
 644                                         google_timestamp = strtoul(google_sig, NULL, 0);
 645                                 }
 646                                 else if(!strcmp(tqx_name, "out")) {
 647                                         google_out = tqx_value;
 648                                         format = web_client_api_request_v1_data_google_format(google_out);
 649                                 }
 650                                 else if(!strcmp(tqx_name, "responseHandler"))
 651                                         responseHandler = tqx_value;
 652                                 else if(!strcmp(tqx_name, "outFileName"))
 653                                         outFileName = tqx_value;
 654                         }
 655                 }
 656         }
 657
 658         if(!chart || !*chart) {
 659                 buffer_sprintf(w->response.data, "No chart id is given at the request.");
 660                 goto cleanup;
 661         }
 662
 663         RRDSET *st = rrdset_find(chart);
 664         if(!st) st = rrdset_find_byname(chart);
 665         if(!st) {
 666                 buffer_sprintf(w->response.data, "Chart '%s' is not found.", chart);
 667                 ret = 404;
 668                 goto cleanup;
 669         }
 670
 671         long long before = (before_str && *before_str)?atol(before_str):0;
 672         long long after  = (after_str  && *after_str) ?atol(after_str):0;
 673         int       points = (points_str && *points_str)?atoi(points_str):0;
 674
 675         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'"
 676                         , w->id
 677                         , chart
 678                         , (dimensions)?buffer_tostring(dimensions):""
 679                         , after
 680                         , before
 681                         , points
 682                         , group
 683                         , format
 684                         , options
 685                         );
 686
 687         if(outFileName && *outFileName) {
 688                 buffer_sprintf(w->response.header, "Content-Disposition: attachment; filename=\"%s\"\r\n", outFileName);
 689                 error("generating outfilename header: '%s'", outFileName);
 690         }
 691
 692         if(format == DATASOURCE_DATATABLE_JSONP) {
 693                 if(responseHandler == NULL)
 694                         responseHandler = "google.visualization.Query.setResponse";
 695
 696                 debug(D_WEB_CLIENT_ACCESS, "%llu: GOOGLE JSON/JSONP: version = '%s', reqId = '%s', sig = '%s', out = '%s', responseHandler = '%s', outFileName = '%s'",
 697                                 w->id, google_version, google_reqId, google_sig, google_out, responseHandler, outFileName
 698                         );
 699
 700                 buffer_sprintf(w->response.data,
 701                         "%s({version:'%s',reqId:'%s',status:'ok',sig:'%lu',table:",
 702                         responseHandler, google_version, google_reqId, st->last_updated.tv_sec);
 703         }
 704         else if(format == DATASOURCE_JSONP) {
 705                 if(responseHandler == NULL)
 706                         responseHandler = "callback";
 707
 708                 buffer_strcat(w->response.data, responseHandler);
 709                 buffer_strcat(w->response.data, "(");
 710         }
 711
 712         ret = rrd2format(st, w->response.data, dimensions, format, points, after, before, group, options, &last_timestamp_in_data);
 713
 714         if(format == DATASOURCE_DATATABLE_JSONP) {
 715                 if(google_timestamp < last_timestamp_in_data)
 716                         buffer_strcat(w->response.data, "});");
 717
 718                 else {
 719                         // the client already has the latest data
 720                         buffer_flush(w->response.data);
 721                         buffer_sprintf(w->response.data,
 722                                 "%s({version:'%s',reqId:'%s',status:'error',errors:[{reason:'not_modified',message:'Data not modified'}]});",
 723                                 responseHandler, google_version, google_reqId);
 724                 }
 725         }
 726         else if(format == DATASOURCE_JSONP)
 727                 buffer_strcat(w->response.data, ");");
 728
 729 cleanup:
 730         if(dimensions) buffer_free(dimensions);
 731         return ret;
 732 }
 733
 734 int web_client_api_request_v1(struct web_client *w, char *url)
 735 {
 736         // get the command
 737         char *tok = mystrsep(&url, "/?&");
 738         debug(D_WEB_CLIENT, "%llu: Searching for API v1 command '%s'.", w->id, tok);
 739
 740         if(strcmp(tok, "data") == 0)
 741                 return web_client_api_request_v1_data(w, url);
 742         else if(strcmp(tok, "chart") == 0)
 743                 return web_client_api_request_v1_chart(w, url);
 744         else if(strcmp(tok, "charts") == 0)
 745                 return web_client_api_request_v1_charts(w, url);
 746
 747         buffer_flush(w->response.data);
 748         buffer_sprintf(w->response.data, "Unsupported v1 API command: %s", tok);
 749         return 404;
 750 }
 751
 752 int web_client_api_request(struct web_client *w, char *url)
 753 {
 754         // get the api version
 755         char *tok = mystrsep(&url, "/?&");
 756         debug(D_WEB_CLIENT, "%llu: Searching for API version '%s'.", w->id, tok);
 757
 758         if(strcmp(tok, "v1") == 0)
 759                 return web_client_api_request_v1(w, url);
 760
 761         buffer_flush(w->response.data);
 762         buffer_sprintf(w->response.data, "Unsupported API version: %s", tok);
 763         return 404;
 764 }
 765
 766 int web_client_data_request(struct web_client *w, char *url, int datasource_type)
 767 {
 768         char *args = strchr(url, '?');
 769         if(args) {
 770                 *args='\0';
 771                 args = &args[1];
 772         }
 773
 774         // get the name of the data to show
 775         char *tok = mystrsep(&url, "/");
 776         debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
 777
 778         // do we have such a data set?
 779         RRDSET *st = rrdset_find_byname(tok);
 780         if(!st) st = rrdset_find(tok);
 781         if(!st) {
 782                 // we don't have it
 783                 // try to send a file with that name
 784                 buffer_flush(w->response.data);
 785                 return(mysendfile(w, tok));
 786         }
 787
 788         // we have it
 789         debug(D_WEB_CLIENT, "%llu: Found RRD data with name '%s'.", w->id, tok);
 790
 791         // how many entries does the client want?
 792         long lines = rrd_default_history_entries;
 793         long group_count = 1;
 794         time_t after = 0, before = 0;
 795         int group_method = GROUP_AVERAGE;
 796         int nonzero = 0;
 797
 798         if(url) {
 799                 // parse the lines required
 800                 tok = mystrsep(&url, "/");
 801                 if(tok) lines = atoi(tok);
 802                 if(lines < 1) lines = 1;
 803         }
 804         if(url) {
 805                 // parse the group count required
 806                 tok = mystrsep(&url, "/");
 807                 if(tok) group_count = atoi(tok);
 808                 if(group_count < 1) group_count = 1;
 809                 //if(group_count > save_history / 20) group_count = save_history / 20;
 810         }
 811         if(url) {
 812                 // parse the grouping method required
 813                 tok = mystrsep(&url, "/");
 814                 if(strcmp(tok, "max") == 0) group_method = GROUP_MAX;
 815                 else if(strcmp(tok, "average") == 0) group_method = GROUP_AVERAGE;
 816                 else if(strcmp(tok, "sum") == 0) group_method = GROUP_SUM;
 817                 else debug(D_WEB_CLIENT, "%llu: Unknown group method '%s'", w->id, tok);
 818         }
 819         if(url) {
 820                 // parse after time
 821                 tok = mystrsep(&url, "/");
 822                 if(tok) after = strtoul(tok, NULL, 10);
 823                 if(after < 0) after = 0;
 824         }
 825         if(url) {
 826                 // parse before time
 827                 tok = mystrsep(&url, "/");
 828                 if(tok) before = strtoul(tok, NULL, 10);
 829                 if(before < 0) before = 0;
 830         }
 831         if(url) {
 832                 // parse nonzero
 833                 tok = mystrsep(&url, "/");
 834                 if(tok && strcmp(tok, "nonzero") == 0) nonzero = 1;
 835         }
 836
 837         w->response.data->contenttype = CT_APPLICATION_JSON;
 838         buffer_flush(w->response.data);
 839
 840         char *google_version = "0.6";
 841         char *google_reqId = "0";
 842         char *google_sig = "0";
 843         char *google_out = "json";
 844         char *google_responseHandler = "google.visualization.Query.setResponse";
 845         char *google_outFileName = NULL;
 846         time_t last_timestamp_in_data = 0;
 847         if(datasource_type == DATASOURCE_DATATABLE_JSON || datasource_type == DATASOURCE_DATATABLE_JSONP) {
 848
 849                 w->response.data->contenttype = CT_APPLICATION_X_JAVASCRIPT;
 850
 851                 while(args) {
 852                         tok = mystrsep(&args, "&");
 853                         if(tok) {
 854                                 char *name = mystrsep(&tok, "=");
 855                                 if(name && strcmp(name, "tqx") == 0) {
 856                                         char *key = mystrsep(&tok, ":");
 857                                         char *value = mystrsep(&tok, ";");
 858                                         if(key && value && *key && *value) {
 859                                                 if(strcmp(key, "version") == 0)
 860                                                         google_version = value;
 861
 862                                                 else if(strcmp(key, "reqId") == 0)
 863                                                         google_reqId = value;
 864
 865                                                 else if(strcmp(key, "sig") == 0)
 866                                                         google_sig = value;
 867
 868                                                 else if(strcmp(key, "out") == 0)
 869                                                         google_out = value;
 870
 871                                                 else if(strcmp(key, "responseHandler") == 0)
 872                                                         google_responseHandler = value;
 873
 874                                                 else if(strcmp(key, "outFileName") == 0)
 875                                                         google_outFileName = value;
 876                                         }
 877                                 }
 878                         }
 879                 }
 880
 881                 debug(D_WEB_CLIENT_ACCESS, "%llu: GOOGLE JSONP: version = '%s', reqId = '%s', sig = '%s', out = '%s', responseHandler = '%s', outFileName = '%s'",
 882                         w->id, google_version, google_reqId, google_sig, google_out, google_responseHandler, google_outFileName
 883                         );
 884
 885                 if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
 886                         last_timestamp_in_data = strtoul(google_sig, NULL, 0);
 887
 888                         // check the client wants json
 889                         if(strcmp(google_out, "json") != 0) {
 890                                 buffer_sprintf(w->response.data,
 891                                         "%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.'}]});",
 892                                         google_responseHandler, google_version, google_reqId, google_out);
 893                                         return 200;
 894                         }
 895                 }
 896         }
 897
 898         if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
 899                 buffer_sprintf(w->response.data,
 900                         "%s({version:'%s',reqId:'%s',status:'ok',sig:'%lu',table:",
 901                         google_responseHandler, google_version, google_reqId, st->last_updated.tv_sec);
 902         }
 903
 904         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);
 905         time_t timestamp_in_data = rrd_stats_json(datasource_type, st, w->response.data, lines, group_count, group_method, after, before, nonzero);
 906
 907         if(datasource_type == DATASOURCE_DATATABLE_JSONP) {
 908                 if(timestamp_in_data > last_timestamp_in_data)
 909                         buffer_strcat(w->response.data, "});");
 910
 911                 else {
 912                         // the client already has the latest data
 913                         buffer_flush(w->response.data);
 914                         buffer_sprintf(w->response.data,
 915                                 "%s({version:'%s',reqId:'%s',status:'error',errors:[{reason:'not_modified',message:'Data not modified'}]});",
 916                                 google_responseHandler, google_version, google_reqId);
 917                 }
 918         }
 919
 920         return 200;
 921 }
 922
 923 /*
 924 int web_client_parse_request(struct web_client *w) {
 925         // protocol
 926         // hostname
 927         // path
 928         // query string name-value
 929         // http version
 930         // method
 931         // http request headers name-value
 932
 933         web_client_clean_request(w);
 934
 935         debug(D_WEB_DATA, "%llu: Processing data buffer of %d bytes: '%s'.", w->id, w->response.data->bytes, w->response.data->buffer);
 936
 937         char *buf = w->response.data->buffer;
 938         char *line, *tok;
 939
 940         // ------------------------------------------------------------------------
 941         // the first line
 942
 943         if(buf && (line = strsep(&buf, "\r\n"))) {
 944                 // method
 945                 if(line && (tok = strsep(&line, " "))) {
 946                         w->request.protocol = strdup(tok);
 947                 }
 948                 else goto cleanup;
 949
 950                 // url
 951         }
 952         else goto cleanup;
 953
 954         // ------------------------------------------------------------------------
 955         // the rest of the lines
 956
 957         while(buf && (line = strsep(&buf, "\r\n"))) {
 958                 while(line && (tok = strsep(&line, ": "))) {
 959                 }
 960         }
 961
 962         char *url = NULL;
 963
 964
 965 cleanup:
 966         web_client_clean_request(w);
 967         return 0;
 968 }
 969 */
 970
 971 void web_client_process(struct web_client *w) {
 972         int code = 500;
 973         ssize_t bytes;
 974
 975         w->wait_receive = 0;
 976
 977         // check if we have an empty line (end of HTTP header)
 978         if(strstr(w->response.data->buffer, "\r\n\r\n")) {
 979                 global_statistics_lock();
 980                 global_statistics.web_requests++;
 981                 global_statistics_unlock();
 982
 983                 gettimeofday(&w->tv_in, NULL);
 984                 debug(D_WEB_DATA, "%llu: Processing data buffer of %d bytes: '%s'.", w->id, w->response.data->len, w->response.data->buffer);
 985
 986                 // check if the client requested keep-alive HTTP
 987                 if(strcasestr(w->response.data->buffer, "Connection: keep-alive")) w->keepalive = 1;
 988                 else w->keepalive = 0;
 989
 990 #ifdef NETDATA_WITH_ZLIB
 991                 // check if the client accepts deflate
 992                 if(web_enable_gzip && strstr(w->response.data->buffer, "gzip"))
 993                         web_client_enable_deflate(w);
 994 #endif // NETDATA_WITH_ZLIB
 995
 996                 int datasource_type = DATASOURCE_DATATABLE_JSONP;
 997                 //if(strstr(w->response.data->buffer, "X-DataSource-Auth"))
 998                 //      datasource_type = DATASOURCE_GOOGLE_JSON;
 999
1000                 char *buf = (char *)buffer_tostring(w->response.data);
1001                 char *tok = strsep(&buf, " \r\n");
1002                 char *url = NULL;
1003                 char *pointer_to_free = NULL; // keep url_decode() allocated buffer
1004
1005                 if(buf && strcmp(tok, "GET") == 0) {
1006                         tok = strsep(&buf, " \r\n");
1007                         pointer_to_free = url = url_decode(tok);
1008                         debug(D_WEB_CLIENT, "%llu: Processing HTTP GET on url '%s'.", w->id, url);
1009                 }
1010                 else if (buf && strcmp(tok, "POST") == 0) {
1011                         w->keepalive = 0;
1012                         tok = strsep(&buf, " \r\n");
1013                         pointer_to_free = url = url_decode(tok);
1014
1015                         debug(D_WEB_CLIENT, "%llu: I don't know how to handle POST with form data. Assuming it is a GET on url '%s'.", w->id, url);
1016                 }
1017
1018                 w->last_url[0] = '\0';
1019                 if(url) {
1020                         strncpy(w->last_url, url, URL_MAX);
1021                         w->last_url[URL_MAX] = '\0';
1022
1023                         tok = mystrsep(&url, "/?");
1024
1025                         debug(D_WEB_CLIENT, "%llu: Processing command '%s'.", w->id, tok);
1026
1027                         if(strcmp(tok, "api") == 0) {
1028                                 // the client is requesting api access
1029                                 datasource_type = DATASOURCE_JSON;
1030                                 code = web_client_api_request(w, url);
1031                         }
1032 #ifdef NETDATA_INTERNAL_CHECKS
1033                         else if(strcmp(tok, "exit") == 0) {
1034                                 netdata_exit = 1;
1035                                 code = 200;
1036                                 w->response.data->contenttype = CT_TEXT_PLAIN;
1037                                 buffer_flush(w->response.data);
1038                                 buffer_strcat(w->response.data, "will do");
1039                         }
1040 #endif
1041                         else if(strcmp(tok, WEB_PATH_DATA) == 0) { // "data"
1042                                 // the client is requesting rrd data
1043                                 datasource_type = DATASOURCE_JSON;
1044                                 code = web_client_data_request(w, url, datasource_type);
1045                         }
1046                         else if(strcmp(tok, WEB_PATH_DATASOURCE) == 0) { // "datasource"
1047                                 // the client is requesting google datasource
1048                                 code = web_client_data_request(w, url, datasource_type);
1049                         }
1050                         else if(strcmp(tok, WEB_PATH_GRAPH) == 0) { // "graph"
1051                                 // the client is requesting an rrd graph
1052
1053                                 // get the name of the data to show
1054                                 tok = mystrsep(&url, "/?&");
1055                                 debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
1056
1057                                 // do we have such a data set?
1058                                 RRDSET *st = rrdset_find_byname(tok);
1059                                 if(!st) st = rrdset_find(tok);
1060                                 if(!st) {
1061                                         // we don't have it
1062                                         // try to send a file with that name
1063                                         buffer_flush(w->response.data);
1064                                         code = mysendfile(w, tok);
1065                                 }
1066                                 else {
1067                                         code = 200;
1068                                         debug(D_WEB_CLIENT_ACCESS, "%llu: Sending %s.json of RRD_STATS...", w->id, st->name);
1069                                         w->response.data->contenttype = CT_APPLICATION_JSON;
1070                                         buffer_flush(w->response.data);
1071                                         rrd_stats_graph_json(st, url, w->response.data);
1072                                 }
1073                         }
1074 #ifdef NETDATA_INTERNAL_CHECKS
1075                         else if(strcmp(tok, "debug") == 0) {
1076                                 buffer_flush(w->response.data);
1077
1078                                 // get the name of the data to show
1079                                 tok = mystrsep(&url, "/?&");
1080                                 debug(D_WEB_CLIENT, "%llu: Searching for RRD data with name '%s'.", w->id, tok);
1081
1082                                 // do we have such a data set?
1083                                 RRDSET *st = rrdset_find_byname(tok);
1084                                 if(!st) st = rrdset_find(tok);
1085                                 if(!st) {
1086                                         code = 404;
1087                                         buffer_sprintf(w->response.data, "Chart %s is not found.\r\n", tok);
1088                                         debug(D_WEB_CLIENT_ACCESS, "%llu: %s is not found.", w->id, tok);
1089                                 }
1090                                 else {
1091                                         code = 200;
1092                                         debug_flags |= D_RRD_STATS;
1093                                         st->debug = st->debug?0:1;
1094                                         buffer_sprintf(w->response.data, "Chart %s has now debug %s.\r\n", tok, st->debug?"enabled":"disabled");
1095                                         debug(D_WEB_CLIENT_ACCESS, "%llu: debug for %s is %s.", w->id, tok, st->debug?"enabled":"disabled");
1096                                 }
1097                         }
1098                         else if(strcmp(tok, "mirror") == 0) {
1099                                 code = 200;
1100
1101                                 debug(D_WEB_CLIENT_ACCESS, "%llu: Mirroring...", w->id);
1102
1103                                 // replace the zero bytes with spaces
1104                                 buffer_char_replace(w->response.data, '\0', ' ');
1105
1106                                 // just leave the buffer as is
1107                                 // it will be copied back to the client
1108                         }
1109 #endif
1110                         else if(strcmp(tok, "list") == 0) {
1111                                 code = 200;
1112
1113                                 debug(D_WEB_CLIENT_ACCESS, "%llu: Sending list of RRD_STATS...", w->id);
1114
1115                                 buffer_flush(w->response.data);
1116                                 RRDSET *st = rrdset_root;
1117
1118                                 for ( ; st ; st = st->next )
1119                                         buffer_sprintf(w->response.data, "%s\n", st->name);
1120                         }
1121                         else if(strcmp(tok, "all.json") == 0) {
1122                                 code = 200;
1123                                 debug(D_WEB_CLIENT_ACCESS, "%llu: Sending JSON list of all monitors of RRD_STATS...", w->id);
1124
1125                                 w->response.data->contenttype = CT_APPLICATION_JSON;
1126                                 buffer_flush(w->response.data);
1127                                 rrd_stats_all_json(w->response.data);
1128                         }
1129                         else if(strcmp(tok, "netdata.conf") == 0) {
1130                                 code = 200;
1131                                 debug(D_WEB_CLIENT_ACCESS, "%llu: Sending netdata.conf ...", w->id);
1132
1133                                 w->response.data->contenttype = CT_TEXT_PLAIN;
1134                                 buffer_flush(w->response.data);
1135                                 generate_config(w->response.data, 0);
1136                         }
1137                         else {
1138                                 char filename[FILENAME_MAX+1];
1139                                 url = filename;
1140                                 strncpy(filename, w->last_url, FILENAME_MAX);
1141                                 filename[FILENAME_MAX] = '\0';
1142                                 tok = mystrsep(&url, "?");
1143                                 buffer_flush(w->response.data);
1144                                 code = mysendfile(w, (tok && *tok)?tok:"/");
1145                         }
1146                 }
1147                 else {
1148                         strcpy(w->last_url, "not a valid response");
1149
1150                         if(buf) debug(D_WEB_CLIENT_ACCESS, "%llu: Cannot understand '%s'.", w->id, buf);
1151
1152                         code = 500;
1153                         buffer_flush(w->response.data);
1154                         buffer_strcat(w->response.data, "I don't understand you...\r\n");
1155                 }
1156
1157                 // free url_decode() buffer
1158                 if(pointer_to_free) free(pointer_to_free);
1159         }
1160         else if(w->response.data->len > 8192) {
1161                 strcpy(w->last_url, "too big request");
1162
1163                 debug(D_WEB_CLIENT_ACCESS, "%llu: Received request is too big.", w->id);
1164
1165                 code = 400;
1166                 buffer_flush(w->response.data);
1167                 buffer_strcat(w->response.data, "Received request is too big.\r\n");
1168         }
1169         else {
1170                 // wait for more data
1171                 w->wait_receive = 1;
1172                 return;
1173         }
1174
1175         gettimeofday(&w->tv_ready, NULL);
1176         w->response.data->date = time(NULL);
1177         w->response.sent = 0;
1178         w->response.code = code;
1179
1180         // prepare the HTTP response header
1181         debug(D_WEB_CLIENT, "%llu: Generating HTTP header with response %d.", w->id, code);
1182
1183         char *content_type_string;
1184         switch(w->response.data->contenttype) {
1185                 case CT_TEXT_HTML:
1186                         content_type_string = "text/html; charset=utf-8";
1187                         break;
1188
1189                 case CT_APPLICATION_XML:
1190                         content_type_string = "application/xml; charset=utf-8";
1191                         break;
1192
1193                 case CT_APPLICATION_JSON:
1194                         content_type_string = "application/json; charset=utf-8";
1195                         break;
1196
1197                 case CT_APPLICATION_X_JAVASCRIPT:
1198                         content_type_string = "application/x-javascript; charset=utf-8";
1199                         break;
1200
1201                 case CT_TEXT_CSS:
1202                         content_type_string = "text/css; charset=utf-8";
1203                         break;
1204
1205                 case CT_TEXT_XML:
1206                         content_type_string = "text/xml; charset=utf-8";
1207                         break;
1208
1209                 case CT_TEXT_XSL:
1210                         content_type_string = "text/xsl; charset=utf-8";
1211                         break;
1212
1213                 case CT_APPLICATION_OCTET_STREAM:
1214                         content_type_string = "application/octet-stream";
1215                         break;
1216
1217                 case CT_IMAGE_SVG_XML:
1218                         content_type_string = "image/svg+xml";
1219                         break;
1220
1221                 case CT_APPLICATION_X_FONT_TRUETYPE:
1222                         content_type_string = "application/x-font-truetype";
1223                         break;
1224
1225                 case CT_APPLICATION_X_FONT_OPENTYPE:
1226                         content_type_string = "application/x-font-opentype";
1227                         break;
1228
1229                 case CT_APPLICATION_FONT_WOFF:
1230                         content_type_string = "application/font-woff";
1231                         break;
1232
1233                 case CT_APPLICATION_FONT_WOFF2:
1234                         content_type_string = "application/font-woff2";
1235                         break;
1236
1237                 case CT_APPLICATION_VND_MS_FONTOBJ:
1238                         content_type_string = "application/vnd.ms-fontobject";
1239                         break;
1240
1241                 default:
1242                 case CT_TEXT_PLAIN:
1243                         content_type_string = "text/plain; charset=utf-8";
1244                         break;
1245         }
1246
1247         char *code_msg;
1248         switch(code) {
1249                 case 200:
1250                         code_msg = "OK";
1251                         break;
1252
1253                 case 307:
1254                         code_msg = "Temporary Redirect";
1255                         break;
1256
1257                 case 400:
1258                         code_msg = "Bad Request";
1259                         break;
1260
1261                 case 403:
1262                         code_msg = "Forbidden";
1263                         break;
1264
1265                 case 404:
1266                         code_msg = "Not Found";
1267                         break;
1268
1269                 default:
1270                         code_msg = "Internal Server Error";
1271                         break;
1272         }
1273
1274         char date[100];
1275         struct tm tmbuf, *tm = gmtime_r(&w->response.data->date, &tmbuf);
1276         strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %Z", tm);
1277
1278         buffer_sprintf(w->response.header_output,
1279                 "HTTP/1.1 %d %s\r\n"
1280                 "Connection: %s\r\n"
1281                 "Server: NetData Embedded HTTP Server\r\n"
1282                 "Content-Type: %s\r\n"
1283                 "Access-Control-Allow-Origin: *\r\n"
1284                 "Access-Control-Allow-Methods: GET\r\n"
1285                 "Access-Control-Allow-Headers: x-requested-with\r\n"
1286                 "Date: %s\r\n"
1287                 , code, code_msg
1288                 , w->keepalive?"keep-alive":"close"
1289                 , content_type_string
1290                 , date
1291                 );
1292
1293         if(buffer_strlen(w->response.header))
1294                 buffer_strcat(w->response.header_output, buffer_tostring(w->response.header));
1295
1296         if(w->mode == WEB_CLIENT_MODE_NORMAL) {
1297                 buffer_sprintf(w->response.header_output,
1298                         "Expires: %s\r\n"
1299                         "Cache-Control: no-cache\r\n"
1300                         "Access-Control-Max-Age: 0\r\n"
1301                         , date);
1302         }
1303         else {
1304                 buffer_strcat(w->response.header_output, "Cache-Control: public\r\n");
1305                 buffer_strcat(w->response.header_output, "Access-Control-Max-Age: 3600\r\n");
1306         }
1307
1308         // if we know the content length, put it
1309         if(!w->response.zoutput && (w->response.data->len || w->response.rlen))
1310                 buffer_sprintf(w->response.header_output,
1311                         "Content-Length: %ld\r\n"
1312                         , w->response.data->len? w->response.data->len: w->response.rlen
1313                         );
1314         else if(!w->response.zoutput)
1315                 w->keepalive = 0;       // content-length is required for keep-alive
1316
1317         if(w->response.zoutput) {
1318                 buffer_strcat(w->response.header_output,
1319                         "Content-Encoding: gzip\r\n"
1320                         "Transfer-Encoding: chunked\r\n"
1321                         );
1322         }
1323
1324         buffer_strcat(w->response.header_output, "\r\n");
1325
1326         // disable TCP_NODELAY, to buffer the header
1327         int flag = 0;
1328         if(setsockopt(w->ofd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int)) != 0)
1329                 error("%llu: failed to disable TCP_NODELAY on socket.", w->id);
1330
1331         // sent the HTTP header
1332         debug(D_WEB_DATA, "%llu: Sending response HTTP header of size %d: '%s'"
1333                         , w->id
1334                         , buffer_strlen(w->response.header_output)
1335                         , buffer_tostring(w->response.header_output)
1336                         );
1337
1338         bytes = send(w->ofd, buffer_tostring(w->response.header_output), buffer_strlen(w->response.header_output), 0);
1339         if(bytes != (ssize_t) buffer_strlen(w->response.header_output))
1340                 error("%llu: HTTP Header failed to be sent (I sent %d bytes but the system sent %d bytes)."
1341                                 , w->id
1342                                 , buffer_strlen(w->response.header_output)
1343                                 , bytes);
1344         else {
1345                 global_statistics_lock();
1346                 global_statistics.bytes_sent += bytes;
1347                 global_statistics_unlock();
1348         }
1349
1350         // enable TCP_NODELAY, to send all data immediately at the next send()
1351         flag = 1;
1352         if(setsockopt(w->ofd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int)) != 0) error("%llu: failed to enable TCP_NODELAY on socket.", w->id);
1353
1354         // enable sending immediately if we have data
1355         if(w->response.data->len) w->wait_send = 1;
1356         else w->wait_send = 0;
1357
1358         // pretty logging
1359         switch(w->mode) {
1360                 case WEB_CLIENT_MODE_NORMAL:
1361                         debug(D_WEB_CLIENT, "%llu: Done preparing the response. Sending data (%d bytes) to client.", w->id, w->response.data->len);
1362                         break;
1363
1364                 case WEB_CLIENT_MODE_FILECOPY:
1365                         if(w->response.rlen) {
1366                                 debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending data file of %d bytes to client.", w->id, w->response.rlen);
1367                                 w->wait_receive = 1;
1368
1369                                 /*
1370                                 // utilize the kernel sendfile() for copying the file to the socket.
1371                                 // this block of code can be commented, without anything missing.
1372                                 // when it is commented, the program will copy the data using async I/O.
1373                                 {
1374                                         long len = sendfile(w->ofd, w->ifd, NULL, w->response.data->rbytes);
1375                                         if(len != w->response.data->rbytes) error("%llu: sendfile() should copy %ld bytes, but copied %ld. Falling back to manual copy.", w->id, w->response.data->rbytes, len);
1376                                         else web_client_reset(w);
1377                                 }
1378                                 */
1379                         }
1380                         else
1381                                 debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending an unknown amount of bytes to client.", w->id);
1382                         break;
1383
1384                 default:
1385                         fatal("%llu: Unknown client mode %d.", w->id, w->mode);
1386                         break;
1387         }
1388 }
1389
1390 long web_client_send_chunk_header(struct web_client *w, long len)
1391 {
1392         debug(D_DEFLATE, "%llu: OPEN CHUNK of %d bytes (hex: %x).", w->id, len, len);
1393         char buf[1024];
1394         sprintf(buf, "%lX\r\n", len);
1395         ssize_t bytes = send(w->ofd, buf, strlen(buf), MSG_DONTWAIT);
1396
1397         if(bytes > 0) debug(D_DEFLATE, "%llu: Sent chunk header %d bytes.", w->id, bytes);
1398         else if(bytes == 0) debug(D_DEFLATE, "%llu: Did not send chunk header to the client.", w->id);
1399         else debug(D_DEFLATE, "%llu: Failed to send chunk header to client.", w->id);
1400
1401         return bytes;
1402 }
1403
1404 long web_client_send_chunk_close(struct web_client *w)
1405 {
1406         //debug(D_DEFLATE, "%llu: CLOSE CHUNK.", w->id);
1407
1408         ssize_t bytes = send(w->ofd, "\r\n", 2, MSG_DONTWAIT);
1409
1410         if(bytes > 0) debug(D_DEFLATE, "%llu: Sent chunk suffix %d bytes.", w->id, bytes);
1411         else if(bytes == 0) debug(D_DEFLATE, "%llu: Did not send chunk suffix to the client.", w->id);
1412         else debug(D_DEFLATE, "%llu: Failed to send chunk suffix to client.", w->id);
1413
1414         return bytes;
1415 }
1416
1417 long web_client_send_chunk_finalize(struct web_client *w)
1418 {
1419         //debug(D_DEFLATE, "%llu: FINALIZE CHUNK.", w->id);
1420
1421         ssize_t bytes = send(w->ofd, "\r\n0\r\n\r\n", 7, MSG_DONTWAIT);
1422
1423         if(bytes > 0) debug(D_DEFLATE, "%llu: Sent chunk suffix %d bytes.", w->id, bytes);
1424         else if(bytes == 0) debug(D_DEFLATE, "%llu: Did not send chunk suffix to the client.", w->id);
1425         else debug(D_DEFLATE, "%llu: Failed to send chunk suffix to client.", w->id);
1426
1427         return bytes;
1428 }
1429
1430 #ifdef NETDATA_WITH_ZLIB
1431 long web_client_send_deflate(struct web_client *w)
1432 {
1433         long len = 0, t = 0;
1434
1435         // when using compression,
1436         // w->response.sent is the amount of bytes passed through compression
1437
1438         debug(D_DEFLATE, "%llu: TEST 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);
1439
1440         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) {
1441                 // there is nothing to send
1442
1443                 debug(D_WEB_CLIENT, "%llu: Out of output data.", w->id);
1444
1445                 // finalize the chunk
1446                 if(w->response.sent != 0)
1447                         t += web_client_send_chunk_finalize(w);
1448
1449                 // there can be two cases for this
1450                 // A. we have done everything
1451                 // B. we temporarily have nothing to send, waiting for the buffer to be filled by ifd
1452
1453                 if(w->mode == WEB_CLIENT_MODE_FILECOPY && w->wait_receive && w->ifd != w->ofd && w->response.rlen && w->response.rlen > w->response.data->len) {
1454                         // we have to wait, more data will come
1455                         debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
1456                         w->wait_send = 0;
1457                         return(0);
1458                 }
1459
1460                 if(w->keepalive == 0) {
1461                         debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %ld bytes sent.", w->id, w->response.sent);
1462                         errno = 0;
1463                         return(-1);
1464                 }
1465
1466                 // reset the client
1467                 web_client_reset(w);
1468                 debug(D_WEB_CLIENT, "%llu: Done sending all data on socket. Waiting for next request on the same socket.", w->id);
1469                 return(0);
1470         }
1471
1472         if(w->response.zhave == w->response.zsent) {
1473                 // compress more input data
1474
1475                 // close the previous open chunk
1476                 if(w->response.sent != 0) t += web_client_send_chunk_close(w);
1477
1478                 debug(D_DEFLATE, "%llu: Compressing %d bytes starting from %d.", w->id, (w->response.data->len - w->response.sent), w->response.sent);
1479
1480                 // give the compressor all the data not passed through the compressor yet
1481                 if(w->response.data->len > w->response.sent) {
1482                         w->response.zstream.next_in = (Bytef *)&w->response.data->buffer[w->response.sent];
1483                         w->response.zstream.avail_in = (uInt) (w->response.data->len - w->response.sent);
1484                 }
1485
1486                 // reset the compressor output buffer
1487                 w->response.zstream.next_out = w->response.zbuffer;
1488                 w->response.zstream.avail_out = ZLIB_CHUNK;
1489
1490                 // ask for FINISH if we have all the input
1491                 int flush = Z_SYNC_FLUSH;
1492                 if(w->mode == WEB_CLIENT_MODE_NORMAL
1493                         || (w->mode == WEB_CLIENT_MODE_FILECOPY && w->response.data->len == w->response.rlen)) {
1494                         flush = Z_FINISH;
1495                         debug(D_DEFLATE, "%llu: Requesting Z_FINISH.", w->id);
1496                 }
1497                 else {
1498                         debug(D_DEFLATE, "%llu: Requesting Z_SYNC_FLUSH.", w->id);
1499                 }
1500
1501                 // compress
1502                 if(deflate(&w->response.zstream, flush) == Z_STREAM_ERROR) {
1503                         error("%llu: Compression failed. Closing down client.", w->id);
1504                         web_client_reset(w);
1505                         return(-1);
1506                 }
1507
1508                 w->response.zhave = ZLIB_CHUNK - w->response.zstream.avail_out;
1509                 w->response.zsent = 0;
1510
1511                 // keep track of the bytes passed through the compressor
1512                 w->response.sent = w->response.data->len;
1513
1514                 debug(D_DEFLATE, "%llu: Compression produced %d bytes.", w->id, w->response.zhave);
1515
1516                 // open a new chunk
1517                 t += web_client_send_chunk_header(w, w->response.zhave);
1518         }
1519
1520         len = send(w->ofd, &w->response.zbuffer[w->response.zsent], (size_t) (w->response.zhave - w->response.zsent), MSG_DONTWAIT);
1521         if(len > 0) {
1522                 w->response.zsent += len;
1523                 if(t > 0) len += t;
1524                 debug(D_WEB_CLIENT, "%llu: Sent %d bytes.", w->id, len);
1525         }
1526         else if(len == 0) 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);
1527         else debug(D_WEB_CLIENT, "%llu: Failed to send data to client. Reason: %s", w->id, strerror(errno));
1528
1529         return(len);
1530 }
1531 #endif // NETDATA_WITH_ZLIB
1532
1533 long web_client_send(struct web_client *w)
1534 {
1535 #ifdef NETDATA_WITH_ZLIB
1536         if(likely(w->response.zoutput)) return web_client_send_deflate(w);
1537 #endif // NETDATA_WITH_ZLIB
1538
1539         long bytes;
1540
1541         if(unlikely(w->response.data->len - w->response.sent == 0)) {
1542                 // there is nothing to send
1543
1544                 debug(D_WEB_CLIENT, "%llu: Out of output data.", w->id);
1545
1546                 // there can be two cases for this
1547                 // A. we have done everything
1548                 // B. we temporarily have nothing to send, waiting for the buffer to be filled by ifd
1549
1550                 if(w->mode == WEB_CLIENT_MODE_FILECOPY && w->wait_receive && w->ifd != w->ofd && w->response.rlen && w->response.rlen > w->response.data->len) {
1551                         // we have to wait, more data will come
1552                         debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
1553                         w->wait_send = 0;
1554                         return(0);
1555                 }
1556
1557                 if(unlikely(w->keepalive == 0)) {
1558                         debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %ld bytes sent.", w->id, w->response.sent);
1559                         errno = 0;
1560                         return(-1);
1561                 }
1562
1563                 web_client_reset(w);
1564                 debug(D_WEB_CLIENT, "%llu: Done sending all data on socket. Waiting for next request on the same socket.", w->id);
1565                 return(0);
1566         }
1567
1568         bytes = send(w->ofd, &w->response.data->buffer[w->response.sent], w->response.data->len - w->response.sent, MSG_DONTWAIT);
1569         if(likely(bytes > 0)) {
1570                 w->response.sent += bytes;
1571                 debug(D_WEB_CLIENT, "%llu: Sent %d bytes.", w->id, bytes);
1572         }
1573         else if(likely(bytes == 0)) debug(D_WEB_CLIENT, "%llu: Did not send any bytes to the client.", w->id);
1574         else debug(D_WEB_CLIENT, "%llu: Failed to send data to client.", w->id);
1575
1576         return(bytes);
1577 }
1578
1579 long web_client_receive(struct web_client *w)
1580 {
1581         // do we have any space for more data?
1582         buffer_need_bytes(w->response.data, WEB_REQUEST_LENGTH);
1583
1584         long left = w->response.data->size - w->response.data->len;
1585         long bytes;
1586
1587         if(unlikely(w->mode == WEB_CLIENT_MODE_FILECOPY))
1588                 bytes = read(w->ifd, &w->response.data->buffer[w->response.data->len], (size_t) (left - 1));
1589         else
1590                 bytes = recv(w->ifd, &w->response.data->buffer[w->response.data->len], (size_t) (left - 1), MSG_DONTWAIT);
1591
1592         if(likely(bytes > 0)) {
1593                 size_t old = w->response.data->len;
1594                 w->response.data->len += bytes;
1595                 w->response.data->buffer[w->response.data->len] = '\0';
1596
1597                 debug(D_WEB_CLIENT, "%llu: Received %d bytes.", w->id, bytes);
1598                 debug(D_WEB_DATA, "%llu: Received data: '%s'.", w->id, &w->response.data->buffer[old]);
1599
1600                 if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
1601                         w->wait_send = 1;
1602                         if(w->response.rlen && w->response.data->len >= w->response.rlen) w->wait_receive = 0;
1603                 }
1604         }
1605         else if(likely(bytes == 0)) {
1606                 debug(D_WEB_CLIENT, "%llu: Out of input data.", w->id);
1607
1608                 // if we cannot read, it means we have an error on input.
1609                 // if however, we are copying a file from ifd to ofd, we should not return an error.
1610                 // in this case, the error should be generated when the file has been sent to the client.
1611
1612                 if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
1613                         // we are copying data from ifd to ofd
1614                         // let it finish copying...
1615                         w->wait_receive = 0;
1616                         debug(D_WEB_CLIENT, "%llu: Disabling input.", w->id);
1617                 }
1618                 else {
1619                         bytes = -1;
1620                         errno = 0;
1621                 }
1622         }
1623
1624         return(bytes);
1625 }
1626
1627
1628 // --------------------------------------------------------------------------------------
1629 // the thread of a single client
1630
1631 // 1. waits for input and output, using async I/O
1632 // 2. it processes HTTP requests
1633 // 3. it generates HTTP responses
1634 // 4. it copies data from input to output if mode is FILECOPY
1635
1636 void *web_client_main(void *ptr)
1637 {
1638         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
1639                 error("Cannot set pthread cancel type to DEFERRED.");
1640
1641         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
1642                 error("Cannot set pthread cancel state to ENABLE.");
1643
1644         struct timeval tv;
1645         struct web_client *w = ptr;
1646         int retval;
1647         fd_set ifds, ofds, efds;
1648         int fdmax = 0;
1649
1650         log_access("%llu: %s port %s connected on thread task id %d", w->id, w->client_ip, w->client_port, gettid());
1651
1652         for(;;) {
1653                 FD_ZERO (&ifds);
1654                 FD_ZERO (&ofds);
1655                 FD_ZERO (&efds);
1656
1657                 FD_SET(w->ifd, &efds);
1658
1659                 if(w->ifd != w->ofd)
1660                         FD_SET(w->ofd, &efds);
1661
1662                 if (w->wait_receive) {
1663                         FD_SET(w->ifd, &ifds);
1664                         if(w->ifd > fdmax) fdmax = w->ifd;
1665                 }
1666
1667                 if (w->wait_send) {
1668                         FD_SET(w->ofd, &ofds);
1669                         if(w->ofd > fdmax) fdmax = w->ofd;
1670                 }
1671
1672                 tv.tv_sec = web_client_timeout;
1673                 tv.tv_usec = 0;
1674
1675                 debug(D_WEB_CLIENT, "%llu: Waiting socket async I/O for %s %s", w->id, w->wait_receive?"INPUT":"", w->wait_send?"OUTPUT":"");
1676                 retval = select(fdmax+1, &ifds, &ofds, &efds, &tv);
1677
1678                 if(retval == -1) {
1679                         debug(D_WEB_CLIENT_ACCESS, "%llu: LISTENER: select() failed.", w->id);
1680                         continue;
1681                 }
1682                 else if(!retval) {
1683                         // timeout
1684                         debug(D_WEB_CLIENT_ACCESS, "%llu: LISTENER: timeout.", w->id);
1685                         break;
1686                 }
1687
1688                 if(FD_ISSET(w->ifd, &efds)) {
1689                         debug(D_WEB_CLIENT_ACCESS, "%llu: Received error on input socket.", w->id);
1690                         break;
1691                 }
1692
1693                 if(FD_ISSET(w->ofd, &efds)) {
1694                         debug(D_WEB_CLIENT_ACCESS, "%llu: Received error on output socket.", w->id);
1695                         break;
1696                 }
1697
1698                 if(w->wait_send && FD_ISSET(w->ofd, &ofds)) {
1699                         long bytes;
1700                         if((bytes = web_client_send(w)) < 0) {
1701                                 debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
1702                                 errno = 0;
1703                                 break;
1704                         }
1705
1706                         global_statistics_lock();
1707                         global_statistics.bytes_sent += bytes;
1708                         global_statistics_unlock();
1709                 }
1710
1711                 if(w->wait_receive && FD_ISSET(w->ifd, &ifds)) {
1712                         long bytes;
1713                         if((bytes = web_client_receive(w)) < 0) {
1714                                 debug(D_WEB_CLIENT, "%llu: Cannot receive data from client. Closing client.", w->id);
1715                                 errno = 0;
1716                                 break;
1717                         }
1718
1719                         global_statistics_lock();
1720                         global_statistics.bytes_received += bytes;
1721                         global_statistics_unlock();
1722
1723                         if(w->mode == WEB_CLIENT_MODE_NORMAL) {
1724                                 debug(D_WEB_CLIENT, "%llu: Attempting to process received data.", w->id);
1725                                 web_client_process(w);
1726                         }
1727                 }
1728         }
1729
1730         log_access("%llu: %s port %s disconnected from thread task id %d", w->id, w->client_ip, w->client_port, gettid());
1731         debug(D_WEB_CLIENT, "%llu: done...", w->id);
1732
1733         web_client_reset(w);
1734         w->obsolete = 1;
1735
1736         return NULL;
1737 }