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