gweb/gweb.c

   1 /*
   2  *
   3  *  Web service library with GLib integration
   4  *
   5  *  Copyright (C) 2009-2010  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <unistd.h>
  30 #include <stdlib.h>
  31 #include <stdarg.h>
  32 #include <string.h>
  33 #include <sys/socket.h>
  34 #include <sys/sendfile.h>
  35 #include <sys/stat.h>
  36 #include <arpa/inet.h>
  37 #include <netdb.h>
  38 #include <net/if.h>
  39 #include <netinet/tcp.h>
  40
  41 #include "giognutls.h"
  42 #include "gresolv.h"
  43 #include "gweb.h"
  44
  45 #define DEFAULT_BUFFER_SIZE  2048
  46
  47 #define SESSION_FLAG_USE_TLS    (1 << 0)
  48
  49 enum chunk_state {
  50         CHUNK_SIZE,
  51         CHUNK_R_BODY,
  52         CHUNK_N_BODY,
  53         CHUNK_DATA,
  54 };
  55
  56 struct _GWebResult {
  57         guint16 status;
  58         const guint8 *buffer;
  59         gsize length;
  60         gboolean use_chunk;
  61         gchar *last_key;
  62         GHashTable *headers;
  63 };
  64
  65 struct web_session {
  66         GWeb *web;
  67
  68         char *address;
  69         char *host;
  70         uint16_t port;
  71         unsigned long flags;
  72         struct addrinfo *addr;
  73
  74         char *content_type;
  75
  76         GIOChannel *transport_channel;
  77         guint transport_watch;
  78         guint send_watch;
  79
  80         guint resolv_action;
  81         char *request;
  82
  83         guint8 *receive_buffer;
  84         gsize receive_space;
  85         GString *send_buffer;
  86         GString *current_header;
  87         gboolean header_done;
  88         gboolean body_done;
  89         gboolean more_data;
  90         gboolean request_started;
  91
  92         enum chunk_state chunck_state;
  93         gsize chunk_size;
  94         gsize chunk_left;
  95         gsize total_len;
  96
  97         GWebResult result;
  98
  99         GWebResultFunc result_func;
 100         GWebInputFunc input_func;
 101         int fd;
 102         gsize length;
 103         gsize offset;
 104         gpointer user_data;
 105 };
 106
 107 struct _GWeb {
 108         int ref_count;
 109
 110         guint next_query_id;
 111
 112         int family;
 113
 114         int index;
 115         GList *session_list;
 116
 117         GResolv *resolv;
 118         char *proxy;
 119         char *accept_option;
 120         char *user_agent;
 121         char *user_agent_profile;
 122         char *http_version;
 123         gboolean close_connection;
 124
 125         GWebDebugFunc debug_func;
 126         gpointer debug_data;
 127 };
 128
 129 static inline void debug(GWeb *web, const char *format, ...)
 130 {
 131         char str[256];
 132         va_list ap;
 133
 134         if (web->debug_func == NULL)
 135                 return;
 136
 137         va_start(ap, format);
 138
 139         if (vsnprintf(str, sizeof(str), format, ap) > 0)
 140                 web->debug_func(str, web->debug_data);
 141
 142         va_end(ap);
 143 }
 144
 145 static void free_session(struct web_session *session)
 146 {
 147         GWeb *web;
 148
 149         if (session == NULL)
 150                 return;
 151
 152         g_free(session->request);
 153
 154         web = session->web;
 155         if (session->resolv_action > 0)
 156                 g_resolv_cancel_lookup(web->resolv, session->resolv_action);
 157
 158         if (session->transport_watch > 0)
 159                 g_source_remove(session->transport_watch);
 160
 161         if (session->send_watch > 0)
 162                 g_source_remove(session->send_watch);
 163
 164         if (session->transport_channel != NULL)
 165                 g_io_channel_unref(session->transport_channel);
 166
 167         g_free(session->result.last_key);
 168
 169         if (session->result.headers != NULL)
 170                 g_hash_table_destroy(session->result.headers);
 171
 172         if (session->send_buffer != NULL)
 173                 g_string_free(session->send_buffer, TRUE);
 174
 175         if (session->current_header != NULL)
 176                 g_string_free(session->current_header, TRUE);
 177
 178         g_free(session->receive_buffer);
 179
 180         g_free(session->content_type);
 181
 182         g_free(session->host);
 183         g_free(session->address);
 184         if (session->addr != NULL)
 185                 freeaddrinfo(session->addr);
 186
 187         g_free(session);
 188 }
 189
 190 static void flush_sessions(GWeb *web)
 191 {
 192         GList *list;
 193
 194         for (list = g_list_first(web->session_list);
 195                                         list; list = g_list_next(list))
 196                 free_session(list->data);
 197
 198         g_list_free(web->session_list);
 199         web->session_list = NULL;
 200 }
 201
 202 GWeb *g_web_new(int index)
 203 {
 204         GWeb *web;
 205
 206         if (index < 0)
 207                 return NULL;
 208
 209         web = g_try_new0(GWeb, 1);
 210         if (web == NULL)
 211                 return NULL;
 212
 213         web->ref_count = 1;
 214
 215         web->next_query_id = 1;
 216
 217         web->family = AF_UNSPEC;
 218
 219         web->index = index;
 220         web->session_list = NULL;
 221
 222         web->resolv = g_resolv_new(index);
 223         if (web->resolv == NULL) {
 224                 g_free(web);
 225                 return NULL;
 226         }
 227
 228         web->accept_option = g_strdup("*/*");
 229         web->user_agent = g_strdup_printf("GWeb/%s", VERSION);
 230         web->close_connection = FALSE;
 231
 232         return web;
 233 }
 234
 235 GWeb *g_web_ref(GWeb *web)
 236 {
 237         if (web == NULL)
 238                 return NULL;
 239
 240         __sync_fetch_and_add(&web->ref_count, 1);
 241
 242         return web;
 243 }
 244
 245 void g_web_unref(GWeb *web)
 246 {
 247         if (web == NULL)
 248                 return;
 249
 250         if (__sync_fetch_and_sub(&web->ref_count, 1) != 1)
 251                 return;
 252
 253         flush_sessions(web);
 254
 255         g_resolv_unref(web->resolv);
 256
 257         g_free(web->proxy);
 258
 259         g_free(web->accept_option);
 260         g_free(web->user_agent);
 261         g_free(web->user_agent_profile);
 262         g_free(web->http_version);
 263
 264         g_free(web);
 265 }
 266
 267 void g_web_set_debug(GWeb *web, GWebDebugFunc func, gpointer user_data)
 268 {
 269         if (web == NULL)
 270                 return;
 271
 272         web->debug_func = func;
 273         web->debug_data = user_data;
 274
 275         g_resolv_set_debug(web->resolv, func, user_data);
 276 }
 277
 278 gboolean g_web_set_proxy(GWeb *web, const char *proxy)
 279 {
 280         if (web == NULL)
 281                 return FALSE;
 282
 283         g_free(web->proxy);
 284
 285         if (proxy == NULL) {
 286                 web->proxy = NULL;
 287                 debug(web, "clearing proxy");
 288         } else {
 289                 web->proxy = g_strdup(proxy);
 290                 debug(web, "setting proxy %s", web->proxy);
 291         }
 292
 293         return TRUE;
 294 }
 295
 296 gboolean g_web_set_address_family(GWeb *web, int family)
 297 {
 298         if (web == NULL)
 299                 return FALSE;
 300
 301         if (family != AF_UNSPEC && family != AF_INET && family != AF_INET6)
 302                 return FALSE;
 303
 304         web->family = family;
 305
 306         g_resolv_set_address_family(web->resolv, family);
 307
 308         return TRUE;
 309 }
 310
 311 gboolean g_web_add_nameserver(GWeb *web, const char *address)
 312 {
 313         if (web == NULL)
 314                 return FALSE;
 315
 316         g_resolv_add_nameserver(web->resolv, address, 53, 0);
 317
 318         return TRUE;
 319 }
 320
 321 static gboolean set_accept_option(GWeb *web, const char *format, va_list args)
 322 {
 323         g_free(web->accept_option);
 324
 325         if (format == NULL) {
 326                 web->accept_option = NULL;
 327                 debug(web, "clearing accept option");
 328         } else {
 329                 web->accept_option = g_strdup_vprintf(format, args);
 330                 debug(web, "setting accept %s", web->accept_option);
 331         }
 332
 333         return TRUE;
 334 }
 335
 336 gboolean g_web_set_accept(GWeb *web, const char *format, ...)
 337 {
 338         va_list args;
 339         gboolean result;
 340
 341         if (web == NULL)
 342                 return FALSE;
 343
 344         va_start(args, format);
 345         result = set_accept_option(web, format, args);
 346         va_end(args);
 347
 348         return result;
 349 }
 350
 351 static gboolean set_user_agent(GWeb *web, const char *format, va_list args)
 352 {
 353         g_free(web->user_agent);
 354
 355         if (format == NULL) {
 356                 web->user_agent = NULL;
 357                 debug(web, "clearing user agent");
 358         } else {
 359                 web->user_agent = g_strdup_vprintf(format, args);
 360                 debug(web, "setting user agent %s", web->user_agent);
 361         }
 362
 363         return TRUE;
 364 }
 365
 366 gboolean g_web_set_user_agent(GWeb *web, const char *format, ...)
 367 {
 368         va_list args;
 369         gboolean result;
 370
 371         if (web == NULL)
 372                 return FALSE;
 373
 374         va_start(args, format);
 375         result = set_user_agent(web, format, args);
 376         va_end(args);
 377
 378         return result;
 379 }
 380
 381 gboolean g_web_set_ua_profile(GWeb *web, const char *profile)
 382 {
 383         if (web == NULL)
 384                 return FALSE;
 385
 386         g_free(web->user_agent_profile);
 387
 388         web->user_agent_profile = g_strdup(profile);
 389         debug(web, "setting user agent profile %s", web->user_agent);
 390
 391         return TRUE;
 392 }
 393
 394 gboolean g_web_set_http_version(GWeb *web, const char *version)
 395 {
 396         if (web == NULL)
 397                 return FALSE;
 398
 399         g_free(web->http_version);
 400
 401         if (version == NULL) {
 402                 web->http_version = NULL;
 403                 debug(web, "clearing HTTP version");
 404         } else {
 405                 web->http_version = g_strdup(version);
 406                 debug(web, "setting HTTP version %s", web->http_version);
 407         }
 408
 409         return TRUE;
 410 }
 411
 412 void g_web_set_close_connection(GWeb *web, gboolean enabled)
 413 {
 414         if (web == NULL)
 415                 return;
 416
 417         web->close_connection = enabled;
 418 }
 419
 420 gboolean g_web_get_close_connection(GWeb *web)
 421 {
 422         if (web == NULL)
 423                 return FALSE;
 424
 425         return web->close_connection;
 426 }
 427
 428 static inline void call_result_func(struct web_session *session, guint16 status)
 429 {
 430         gboolean result;
 431
 432         if (session->result_func == NULL)
 433                 return;
 434
 435         if (status != 0)
 436                 session->result.status = status;
 437
 438         result = session->result_func(&session->result, session->user_data);
 439
 440         debug(session->web, "[result function] %s",
 441                                         result == TRUE ? "continue" : "stop");
 442 }
 443
 444 static gboolean process_send_buffer(struct web_session *session)
 445 {
 446         GString *buf;
 447         gsize count, bytes_written;
 448         GIOStatus status;
 449
 450         if (session == NULL)
 451                 return FALSE;
 452
 453         buf = session->send_buffer;
 454         count = buf->len;
 455
 456         if (count == 0) {
 457                 if (session->request_started == TRUE &&
 458                                         session->more_data == FALSE &&
 459                                         session->fd == -1)
 460                         session->body_done = TRUE;
 461
 462                 return FALSE;
 463         }
 464
 465         status = g_io_channel_write_chars(session->transport_channel,
 466                                         buf->str, count, &bytes_written, NULL);
 467
 468         debug(session->web, "status %u bytes to write %zu bytes written %zu",
 469                                         status, count, bytes_written);
 470
 471         if (status != G_IO_STATUS_NORMAL && status != G_IO_STATUS_AGAIN)
 472                 return FALSE;
 473
 474         g_string_erase(buf, 0, bytes_written);
 475
 476         return TRUE;
 477 }
 478
 479 static gboolean process_send_file(struct web_session *session)
 480 {
 481         int sk;
 482         off_t offset;
 483         ssize_t bytes_sent;
 484
 485         if (session->fd == -1)
 486                 return FALSE;
 487
 488         sk = g_io_channel_unix_get_fd(session->transport_channel);
 489         if (sk < 0)
 490                 return FALSE;
 491
 492         offset = session->offset;
 493
 494         bytes_sent = sendfile(sk, session->fd, &offset, session->length);
 495
 496         debug(session->web, "errno: %d, bytes to send %zu / bytes sent %zu",
 497                         errno, session->length, bytes_sent);
 498
 499         if (bytes_sent < 0 && errno != EAGAIN)
 500                 return FALSE;
 501
 502         session->offset = offset;
 503         session->length -= bytes_sent;
 504
 505         if (session->length == 0) {
 506                 session->body_done = TRUE;
 507                 return FALSE;
 508         }
 509
 510         return TRUE;
 511 }
 512
 513 static void process_next_chunk(struct web_session *session)
 514 {
 515         GString *buf = session->send_buffer;
 516         const guint8 *body;
 517         gsize length;
 518
 519         if (session->input_func == NULL) {
 520                 session->more_data = FALSE;
 521                 return;
 522         }
 523
 524         session->more_data = session->input_func(&body, &length,
 525                                                 session->user_data);
 526
 527         if (length > 0) {
 528                 g_string_append_printf(buf, "%zx\r\n", length);
 529                 g_string_append_len(buf, (char *) body, length);
 530                 g_string_append(buf, "\r\n");
 531         }
 532
 533         if (session->more_data == FALSE)
 534                 g_string_append(buf, "0\r\n\r\n");
 535 }
 536
 537 static void start_request(struct web_session *session)
 538 {
 539         GString *buf = session->send_buffer;
 540         const char *version;
 541         const guint8 *body;
 542         gsize length;
 543
 544         debug(session->web, "request %s from %s",
 545                                         session->request, session->host);
 546
 547         g_string_truncate(buf, 0);
 548
 549         if (session->web->http_version == NULL)
 550                 version = "1.1";
 551         else
 552                 version = session->web->http_version;
 553
 554         if (session->content_type == NULL)
 555                 g_string_append_printf(buf, "GET %s HTTP/%s\r\n",
 556                                                 session->request, version);
 557         else
 558                 g_string_append_printf(buf, "POST %s HTTP/%s\r\n",
 559                                                 session->request, version);
 560
 561         g_string_append_printf(buf, "Host: %s\r\n", session->host);
 562
 563         if (session->web->user_agent != NULL)
 564                 g_string_append_printf(buf, "User-Agent: %s\r\n",
 565                                                 session->web->user_agent);
 566
 567         if (session->web->user_agent_profile != NULL) {
 568                 g_string_append_printf(buf, "x-wap-profile: %s\r\n",
 569                                        session->web->user_agent_profile);
 570         }
 571
 572         if (session->web->accept_option != NULL)
 573                 g_string_append_printf(buf, "Accept: %s\r\n",
 574                                                 session->web->accept_option);
 575
 576         if (session->content_type != NULL) {
 577                 g_string_append_printf(buf, "Content-Type: %s\r\n",
 578                                                         session->content_type);
 579                 if (session->input_func == NULL) {
 580                         session->more_data = FALSE;
 581                         length = session->length;
 582                 } else
 583                         session->more_data = session->input_func(&body, &length,
 584                                                         session->user_data);
 585                 if (session->more_data == FALSE)
 586                         g_string_append_printf(buf, "Content-Length: %zu\r\n",
 587                                                                         length);
 588                 else
 589                         g_string_append(buf, "Transfer-Encoding: chunked\r\n");
 590         }
 591
 592         if (session->web->close_connection == TRUE)
 593                 g_string_append(buf, "Connection: close\r\n");
 594
 595         g_string_append(buf, "\r\n");
 596
 597         if (session->content_type != NULL && length > 0) {
 598                 if (session->more_data == TRUE) {
 599                         g_string_append_printf(buf, "%zx\r\n", length);
 600                         g_string_append_len(buf, (char *) body, length);
 601                         g_string_append(buf, "\r\n");
 602                 } else if (session->fd == -1)
 603                         g_string_append_len(buf, (char *) body, length);
 604         }
 605 }
 606
 607 static gboolean send_data(GIOChannel *channel, GIOCondition cond,
 608                                                 gpointer user_data)
 609 {
 610         struct web_session *session = user_data;
 611
 612         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
 613                 session->send_watch = 0;
 614                 return FALSE;
 615         }
 616
 617         if (process_send_buffer(session) == TRUE)
 618                 return TRUE;
 619
 620         if (process_send_file(session) == TRUE)
 621                 return TRUE;
 622
 623         if (session->request_started == FALSE) {
 624                 session->request_started = TRUE;
 625                 start_request(session);
 626         } else if (session->more_data == TRUE)
 627                 process_next_chunk(session);
 628
 629         process_send_buffer(session);
 630
 631         if (session->body_done == TRUE) {
 632                 session->send_watch = 0;
 633                 return FALSE;
 634         }
 635
 636         return TRUE;
 637 }
 638
 639 static int decode_chunked(struct web_session *session,
 640                                         const guint8 *buf, gsize len)
 641 {
 642         const guint8 *ptr = buf;
 643         gsize counter;
 644
 645         while (len > 0) {
 646                 guint8 *pos;
 647                 gsize count;
 648                 char *str;
 649
 650                 switch (session->chunck_state) {
 651                 case CHUNK_SIZE:
 652                         pos = memchr(ptr, '\n', len);
 653                         if (pos == NULL) {
 654                                 g_string_append_len(session->current_header,
 655                                                 (gchar *) ptr, len);
 656                                 return 0;
 657                         }
 658
 659                         count = pos - ptr;
 660                         if (count < 1 || ptr[count - 1] != '\r')
 661                                 return -EILSEQ;
 662
 663                         g_string_append_len(session->current_header,
 664                                                 (gchar *) ptr, count);
 665
 666                         len -= count + 1;
 667                         ptr = pos + 1;
 668
 669                         str = session->current_header->str;
 670
 671                         counter = strtoul(str, NULL, 16);
 672                         if ((counter == 0 && errno == EINVAL) ||
 673                                                 counter == ULONG_MAX)
 674                                 return -EILSEQ;
 675
 676                         session->chunk_size = counter;
 677                         session->chunk_left = counter;
 678
 679                         session->chunck_state = CHUNK_DATA;
 680                         break;
 681                 case CHUNK_R_BODY:
 682                         if (*ptr != '\r')
 683                                 return -EILSEQ;
 684                         ptr++;
 685                         len--;
 686                         session->chunck_state = CHUNK_N_BODY;
 687                         break;
 688                 case CHUNK_N_BODY:
 689                         if (*ptr != '\n')
 690                                 return -EILSEQ;
 691                         ptr++;
 692                         len--;
 693                         session->chunck_state = CHUNK_SIZE;
 694                         break;
 695                 case CHUNK_DATA:
 696                         if (session->chunk_size == 0) {
 697                                 debug(session->web, "Download Done in chunk");
 698                                 g_string_truncate(session->current_header, 0);
 699                                 return 0;
 700                         }
 701
 702                         if (session->chunk_left <= len) {
 703                                 session->result.buffer = ptr;
 704                                 session->result.length = session->chunk_left;
 705                                 call_result_func(session, 0);
 706
 707                                 len -= session->chunk_left;
 708                                 ptr += session->chunk_left;
 709
 710                                 session->total_len += session->chunk_left;
 711                                 session->chunk_left = 0;
 712
 713                                 g_string_truncate(session->current_header, 0);
 714                                 session->chunck_state = CHUNK_R_BODY;
 715                                 break;
 716                         }
 717                         /* more data */
 718                         session->result.buffer = ptr;
 719                         session->result.length = len;
 720                         call_result_func(session, 0);
 721
 722                         session->chunk_left -= len;
 723                         session->total_len += len;
 724
 725                         len -= len;
 726                         ptr += len;
 727                         break;
 728                 }
 729         }
 730
 731         return 0;
 732 }
 733
 734 static int handle_body(struct web_session *session,
 735                                 const guint8 *buf, gsize len)
 736 {
 737         int err;
 738
 739         debug(session->web, "[body] length %zu", len);
 740
 741         if (session->result.use_chunk == FALSE) {
 742                 if (len > 0) {
 743                         session->result.buffer = buf;
 744                         session->result.length = len;
 745                         call_result_func(session, 0);
 746                 }
 747                 return 0;
 748         }
 749
 750         err = decode_chunked(session, buf, len);
 751         if (err < 0) {
 752                 debug(session->web, "Error in chunk decode %d", err);
 753
 754                 session->result.buffer = NULL;
 755                 session->result.length = 0;
 756                 call_result_func(session, 400);
 757         }
 758
 759         return err;
 760 }
 761
 762 static void handle_multi_line(struct web_session *session)
 763 {
 764         gsize count;
 765         char *str;
 766         gchar *value;
 767
 768         str = session->current_header->str;
 769
 770         if (str[0] != ' ' && str[0] != '\t')
 771                 return;
 772
 773         while (str[0] == ' ' || str[0] == '\t')
 774                 str++;
 775
 776         count = str - session->current_header->str;
 777         if (count > 0) {
 778                 g_string_erase(session->current_header, 0, count);
 779                 g_string_insert_c(session->current_header, 0, ' ');
 780         }
 781
 782         value = g_hash_table_lookup(session->result.headers,
 783                                         session->result.last_key);
 784         if (value != NULL) {
 785                 g_string_insert(session->current_header, 0, value);
 786
 787                 str = session->current_header->str;
 788
 789                 g_hash_table_replace(session->result.headers,
 790                                         g_strdup(session->result.last_key),
 791                                         g_strdup(str));
 792         }
 793 }
 794
 795 static void add_header_field(struct web_session *session)
 796 {
 797         gsize count;
 798         guint8 *pos;
 799         char *str;
 800         gchar *value;
 801         gchar *key;
 802
 803         str = session->current_header->str;
 804
 805         pos = memchr(str, ':', session->current_header->len);
 806         if (pos != NULL) {
 807                 *pos = '\0';
 808                 pos++;
 809
 810                 key = g_strdup(str);
 811
 812                 /* remove preceding white spaces */
 813                 while (*pos == ' ')
 814                         pos++;
 815
 816                 count = (char *) pos - str;
 817
 818                 g_string_erase(session->current_header, 0, count);
 819
 820                 value = g_hash_table_lookup(session->result.headers, key);
 821                 if (value != NULL) {
 822                         g_string_insert_c(session->current_header, 0, ' ');
 823                         g_string_insert_c(session->current_header, 0, ';');
 824
 825                         g_string_insert(session->current_header, 0, value);
 826                 }
 827
 828                 str = session->current_header->str;
 829                 g_hash_table_replace(session->result.headers, key,
 830                                                         g_strdup(str));
 831
 832                 g_free(session->result.last_key);
 833                 session->result.last_key = g_strdup(key);
 834         }
 835 }
 836
 837 static gboolean received_data(GIOChannel *channel, GIOCondition cond,
 838                                                         gpointer user_data)
 839 {
 840         struct web_session *session = user_data;
 841         guint8 *ptr = session->receive_buffer;
 842         gsize bytes_read;
 843         GIOStatus status;
 844
 845         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
 846                 session->transport_watch = 0;
 847                 session->result.buffer = NULL;
 848                 session->result.length = 0;
 849                 call_result_func(session, 400);
 850                 return FALSE;
 851         }
 852
 853         status = g_io_channel_read_chars(channel,
 854                                 (gchar *) session->receive_buffer,
 855                                 session->receive_space - 1, &bytes_read, NULL);
 856
 857         debug(session->web, "bytes read %zu", bytes_read);
 858
 859         if (status != G_IO_STATUS_NORMAL && status != G_IO_STATUS_AGAIN) {
 860                 session->transport_watch = 0;
 861                 session->result.buffer = NULL;
 862                 session->result.length = 0;
 863                 call_result_func(session, 0);
 864                 return FALSE;
 865         }
 866
 867         session->receive_buffer[bytes_read] = '\0';
 868
 869         if (session->header_done == TRUE) {
 870                 if (handle_body(session, session->receive_buffer,
 871                                                         bytes_read) < 0) {
 872                         session->transport_watch = 0;
 873                         return FALSE;
 874                 }
 875                 return TRUE;
 876         }
 877
 878         while (bytes_read > 0) {
 879                 guint8 *pos;
 880                 gsize count;
 881                 char *str;
 882
 883                 pos = memchr(ptr, '\n', bytes_read);
 884                 if (pos == NULL) {
 885                         g_string_append_len(session->current_header,
 886                                                 (gchar *) ptr, bytes_read);
 887                         return TRUE;
 888                 }
 889
 890                 *pos = '\0';
 891                 count = strlen((char *) ptr);
 892                 if (count > 0 && ptr[count - 1] == '\r') {
 893                         ptr[--count] = '\0';
 894                         bytes_read--;
 895                 }
 896
 897                 g_string_append_len(session->current_header,
 898                                                 (gchar *) ptr, count);
 899
 900                 bytes_read -= count + 1;
 901                 if (bytes_read > 0)
 902                         ptr = pos + 1;
 903                 else
 904                         ptr = NULL;
 905
 906                 if (session->current_header->len == 0) {
 907                         char *val;
 908
 909                         session->header_done = TRUE;
 910
 911                         val = g_hash_table_lookup(session->result.headers,
 912                                                         "Transfer-Encoding");
 913                         if (val != NULL) {
 914                                 val = g_strrstr(val, "chunked");
 915                                 if (val != NULL) {
 916                                         session->result.use_chunk = TRUE;
 917
 918                                         session->chunck_state = CHUNK_SIZE;
 919                                         session->chunk_left = 0;
 920                                         session->total_len = 0;
 921                                 }
 922                         }
 923
 924                         if (handle_body(session, ptr, bytes_read) < 0) {
 925                                 session->transport_watch = 0;
 926                                 return FALSE;
 927                         }
 928                         break;
 929                 }
 930
 931                 str = session->current_header->str;
 932
 933                 if (session->result.status == 0) {
 934                         unsigned int code;
 935
 936                         if (sscanf(str, "HTTP/%*s %u %*s", &code) == 1)
 937                                 session->result.status = code;
 938                 }
 939
 940                 debug(session->web, "[header] %s", str);
 941
 942                 /* handle multi-line header */
 943                 if (str[0] == ' ' || str[0] == '\t')
 944                         handle_multi_line(session);
 945                 else
 946                         add_header_field(session);
 947
 948                 g_string_truncate(session->current_header, 0);
 949         }
 950
 951         return TRUE;
 952 }
 953
 954 static int connect_session_transport(struct web_session *session)
 955 {
 956         GIOFlags flags;
 957         int sk;
 958
 959         sk = socket(session->addr->ai_family, SOCK_STREAM | SOCK_CLOEXEC,
 960                         IPPROTO_TCP);
 961         if (sk < 0)
 962                 return -EIO;
 963
 964         if (session->web->index > 0) {
 965                 char interface[IF_NAMESIZE];
 966
 967                 memset(interface, 0, IF_NAMESIZE);
 968
 969                 if (if_indextoname(session->web->index, interface) != NULL) {
 970                         if (setsockopt(sk, SOL_SOCKET, SO_BINDTODEVICE,
 971                                                 interface, IF_NAMESIZE) < 0) {
 972                                 close(sk);
 973                                 return -EIO;
 974                         }
 975
 976                         debug(session->web, "Use interface %s", interface);
 977                 }
 978         }
 979
 980         if (session->flags & SESSION_FLAG_USE_TLS) {
 981                 debug(session->web, "using TLS encryption");
 982                 session->transport_channel = g_io_channel_gnutls_new(sk);
 983         } else {
 984                 debug(session->web, "no encryption");
 985                 session->transport_channel = g_io_channel_unix_new(sk);
 986         }
 987
 988         if (session->transport_channel == NULL) {
 989                 close(sk);
 990                 return -ENOMEM;
 991         }
 992
 993         flags = g_io_channel_get_flags(session->transport_channel);
 994         g_io_channel_set_flags(session->transport_channel,
 995                                         flags | G_IO_FLAG_NONBLOCK, NULL);
 996
 997         g_io_channel_set_encoding(session->transport_channel, NULL, NULL);
 998         g_io_channel_set_buffered(session->transport_channel, FALSE);
 999
1000         g_io_channel_set_close_on_unref(session->transport_channel, TRUE);
1001
1002         if (connect(sk, session->addr->ai_addr,
1003                         session->addr->ai_addrlen) < 0) {
1004                 if (errno != EINPROGRESS) {
1005                         close(sk);
1006                         return -EIO;
1007                 }
1008         }
1009
1010         session->transport_watch = g_io_add_watch(session->transport_channel,
1011                                 G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
1012                                                 received_data, session);
1013
1014         session->send_watch = g_io_add_watch(session->transport_channel,
1015                                 G_IO_OUT | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
1016                                                 send_data, session);
1017
1018         return 0;
1019 }
1020
1021 static int create_transport(struct web_session *session)
1022 {
1023         int err;
1024
1025         err = connect_session_transport(session);
1026         if (err < 0)
1027                 return err;
1028
1029         debug(session->web, "creating session %s:%u",
1030                                         session->address, session->port);
1031
1032         return 0;
1033 }
1034
1035 static int parse_url(struct web_session *session,
1036                                 const char *url, const char *proxy)
1037 {
1038         char *scheme, *host, *port, *path;
1039
1040         scheme = g_strdup(url);
1041         if (scheme == NULL)
1042                 return -EINVAL;
1043
1044         host = strstr(scheme, "://");
1045         if (host != NULL) {
1046                 *host = '\0';
1047                 host += 3;
1048
1049                 if (strcasecmp(scheme, "https") == 0) {
1050                         session->port = 443;
1051                         session->flags |= SESSION_FLAG_USE_TLS;
1052                 } else if (strcasecmp(scheme, "http") == 0) {
1053                         session->port = 80;
1054                 } else {
1055                         g_free(scheme);
1056                         return -EINVAL;
1057                 }
1058         } else {
1059                 host = scheme;
1060                 session->port = 80;
1061         }
1062
1063         path = strchr(host, '/');
1064         if (path != NULL)
1065                 *(path++) = '\0';
1066
1067         if (proxy == NULL)
1068                 session->request = g_strdup_printf("/%s", path ? path : "");
1069         else
1070                 session->request = g_strdup(url);
1071
1072         port = strrchr(host, ':');
1073         if (port != NULL) {
1074                 char *end;
1075                 int tmp = strtol(port + 1, &end, 10);
1076
1077                 if (*end == '\0') {
1078                         *port = '\0';
1079                         session->port = tmp;
1080                 }
1081
1082                 if (proxy == NULL)
1083                         session->host = g_strdup(host);
1084                 else
1085                         session->host = g_strdup_printf("%s:%u", host, tmp);
1086         } else
1087                 session->host = g_strdup(host);
1088
1089         g_free(scheme);
1090
1091         if (proxy == NULL)
1092                 return 0;
1093
1094         scheme = g_strdup(proxy);
1095         if (scheme == NULL)
1096                 return -EINVAL;
1097
1098         host = strstr(proxy, "://");
1099         if (host != NULL) {
1100                 *host = '\0';
1101                 host += 3;
1102
1103                 if (strcasecmp(scheme, "http") != 0) {
1104                         g_free(scheme);
1105                         return -EINVAL;
1106                 }
1107         } else
1108                 host = scheme;
1109
1110         path = strchr(host, '/');
1111         if (path != NULL)
1112                 *(path++) = '\0';
1113
1114         port = strrchr(host, ':');
1115         if (port != NULL) {
1116                 char *end;
1117                 int tmp = strtol(port + 1, &end, 10);
1118
1119                 if (*end == '\0') {
1120                         *port = '\0';
1121                         session->port = tmp;
1122                 }
1123         }
1124
1125         session->address = g_strdup(host);
1126
1127         g_free(scheme);
1128
1129         return 0;
1130 }
1131
1132 static void resolv_result(GResolvResultStatus status,
1133                                         char **results, gpointer user_data)
1134 {
1135         struct web_session *session = user_data;
1136         struct addrinfo hints;
1137         char *port;
1138         int ret;
1139
1140         if (results == NULL || results[0] == NULL) {
1141                 call_result_func(session, 404);
1142                 return;
1143         }
1144
1145         debug(session->web, "address %s", results[0]);
1146
1147         memset(&hints, 0, sizeof(struct addrinfo));
1148         hints.ai_flags = AI_NUMERICHOST;
1149         hints.ai_family = session->web->family;
1150
1151         if (session->addr != NULL) {
1152                 freeaddrinfo(session->addr);
1153                 session->addr = NULL;
1154         }
1155
1156         port = g_strdup_printf("%u", session->port);
1157         ret = getaddrinfo(results[0], port, &hints, &session->addr);
1158         g_free(port);
1159         if (ret != 0 || session->addr == NULL) {
1160                 call_result_func(session, 400);
1161                 return;
1162         }
1163
1164         session->address = g_strdup(results[0]);
1165
1166         if (create_transport(session) < 0) {
1167                 call_result_func(session, 409);
1168                 return;
1169         }
1170 }
1171
1172 static guint do_request(GWeb *web, const char *url,
1173                                 const char *type, GWebInputFunc input,
1174                                 int fd, gsize length, GWebResultFunc func,
1175                                 gpointer user_data)
1176 {
1177         struct web_session *session;
1178
1179         if (web == NULL || url == NULL)
1180                 return 0;
1181
1182         debug(web, "request %s", url);
1183
1184         session = g_try_new0(struct web_session, 1);
1185         if (session == NULL)
1186                 return 0;
1187
1188         if (parse_url(session, url, web->proxy) < 0) {
1189                 free_session(session);
1190                 return 0;
1191         }
1192
1193         debug(web, "address %s", session->address);
1194         debug(web, "port %u", session->port);
1195         debug(web, "host %s", session->host);
1196         debug(web, "flags %lu", session->flags);
1197         debug(web, "request %s", session->request);
1198
1199         if (type != NULL) {
1200                 session->content_type = g_strdup(type);
1201
1202                 debug(web, "content-type %s", session->content_type);
1203         }
1204
1205         session->web = web;
1206
1207         session->result_func = func;
1208         session->input_func = input;
1209         session->fd = fd;
1210         session->length = length;
1211         session->offset = 0;
1212         session->user_data = user_data;
1213
1214         session->receive_buffer = g_try_malloc(DEFAULT_BUFFER_SIZE);
1215         if (session->receive_buffer == NULL) {
1216                 free_session(session);
1217                 return 0;
1218         }
1219
1220         session->result.headers = g_hash_table_new_full(g_str_hash, g_str_equal,
1221                                                         g_free, g_free);
1222         if (session->result.headers == NULL) {
1223                 free_session(session);
1224                 return 0;
1225         }
1226
1227         session->receive_space = DEFAULT_BUFFER_SIZE;
1228         session->send_buffer = g_string_sized_new(0);
1229         session->current_header = g_string_sized_new(0);
1230         session->header_done = FALSE;
1231         session->body_done = FALSE;
1232
1233         if (session->address == NULL && inet_aton(session->host, NULL) == 0) {
1234                 session->resolv_action = g_resolv_lookup_hostname(web->resolv,
1235                                         session->host, resolv_result, session);
1236                 if (session->resolv_action == 0) {
1237                         free_session(session);
1238                         return 0;
1239                 }
1240         } else {
1241                 struct addrinfo hints;
1242                 char *port;
1243                 int ret;
1244
1245                 if (session->address == NULL)
1246                         session->address = g_strdup(session->host);
1247
1248                 memset(&hints, 0, sizeof(struct addrinfo));
1249                 hints.ai_flags = AI_NUMERICHOST;
1250                 hints.ai_family = session->web->family;
1251
1252                 if (session->addr != NULL) {
1253                         freeaddrinfo(session->addr);
1254                         session->addr = NULL;
1255                 }
1256
1257                 port = g_strdup_printf("%u", session->port);
1258                 ret = getaddrinfo(session->address, port, &hints,
1259                                                         &session->addr);
1260                 g_free(port);
1261                 if (ret != 0 || session->addr == NULL) {
1262                         free_session(session);
1263                         return 0;
1264                 }
1265
1266                 if (create_transport(session) < 0) {
1267                         free_session(session);
1268                         return 0;
1269                 }
1270         }
1271
1272         web->session_list = g_list_append(web->session_list, session);
1273
1274         return web->next_query_id++;
1275 }
1276
1277 guint g_web_request_get(GWeb *web, const char *url,
1278                                 GWebResultFunc func, gpointer user_data)
1279 {
1280         return do_request(web, url, NULL, NULL, -1, 0, func, user_data);
1281 }
1282
1283 guint g_web_request_post(GWeb *web, const char *url,
1284                                 const char *type, GWebInputFunc input,
1285                                 GWebResultFunc func, gpointer user_data)
1286 {
1287         return do_request(web, url, type, input, -1, 0, func, user_data);
1288 }
1289
1290 guint g_web_request_post_file(GWeb *web, const char *url,
1291                                 const char *type, const char *file,
1292                                 GWebResultFunc func, gpointer user_data)
1293 {
1294         struct stat st;
1295         int fd;
1296         guint ret;
1297
1298         if (stat(file, &st) < 0)
1299                 return 0;
1300
1301         fd = open(file, O_RDONLY);
1302         if (fd < 0)
1303                 return 0;
1304
1305         ret = do_request(web, url, type, NULL, fd, st.st_size, func, user_data);
1306         if (ret == 0)
1307                 close(fd);
1308
1309         return ret;
1310 }
1311
1312 gboolean g_web_cancel_request(GWeb *web, guint id)
1313 {
1314         if (web == NULL)
1315                 return FALSE;
1316
1317         return TRUE;
1318 }
1319
1320 guint16 g_web_result_get_status(GWebResult *result)
1321 {
1322         if (result == NULL)
1323                 return 0;
1324
1325         return result->status;
1326 }
1327
1328 gboolean g_web_result_get_chunk(GWebResult *result,
1329                                 const guint8 **chunk, gsize *length)
1330 {
1331         if (result == NULL)
1332                 return FALSE;
1333
1334         if (chunk == NULL)
1335                 return FALSE;
1336
1337         *chunk = result->buffer;
1338
1339         if (length != NULL)
1340                 *length = result->length;
1341
1342         return TRUE;
1343 }
1344
1345 gboolean g_web_result_get_header(GWebResult *result,
1346                                 const char *header, const char **value)
1347 {
1348         if (result == NULL)
1349                 return FALSE;
1350
1351         if (value == NULL)
1352                 return FALSE;
1353
1354         *value = g_hash_table_lookup(result->headers, header);
1355
1356         if (*value == NULL)
1357                 return FALSE;
1358
1359         return TRUE;
1360 }
1361
1362 struct _GWebParser {
1363         gint ref_count;
1364         char *begin_token;
1365         char *end_token;
1366         const char *token_str;
1367         size_t token_len;
1368         size_t token_pos;
1369         gboolean intoken;
1370         GString *content;
1371         GWebParserFunc func;
1372         gpointer user_data;
1373 };
1374
1375 GWebParser *g_web_parser_new(const char *begin, const char *end,
1376                                 GWebParserFunc func, gpointer user_data)
1377 {
1378         GWebParser *parser;
1379
1380         parser = g_try_new0(GWebParser, 1);
1381         if (parser == NULL)
1382                 return NULL;
1383
1384         parser->ref_count = 1;
1385
1386         parser->begin_token = g_strdup(begin);
1387         parser->end_token = g_strdup(end);
1388
1389         if (parser->begin_token == NULL) {
1390                 g_free(parser);
1391                 return NULL;
1392         }
1393
1394         parser->func = func;
1395         parser->user_data = user_data;
1396
1397         parser->token_str = parser->begin_token;
1398         parser->token_len = strlen(parser->token_str);
1399         parser->token_pos = 0;
1400
1401         parser->intoken = FALSE;
1402         parser->content = g_string_sized_new(0);
1403
1404         return parser;
1405 }
1406
1407 GWebParser *g_web_parser_ref(GWebParser *parser)
1408 {
1409         if (parser == NULL)
1410                 return NULL;
1411
1412         __sync_fetch_and_add(&parser->ref_count, 1);
1413
1414         return parser;
1415 }
1416
1417 void g_web_parser_unref(GWebParser *parser)
1418 {
1419         if (parser == NULL)
1420                 return;
1421
1422         if (__sync_fetch_and_sub(&parser->ref_count, 1) != 1)
1423                 return;
1424
1425         g_string_free(parser->content, TRUE);
1426
1427         g_free(parser->begin_token);
1428         g_free(parser->end_token);
1429         g_free(parser);
1430 }
1431
1432 void g_web_parser_feed_data(GWebParser *parser,
1433                                 const guint8 *data, gsize length)
1434 {
1435         const guint8 *ptr = data;
1436
1437         if (parser == NULL)
1438                 return;
1439
1440         while (length > 0) {
1441                 guint8 chr = parser->token_str[parser->token_pos];
1442
1443                 if (parser->token_pos == 0) {
1444                         guint8 *pos;
1445
1446                         pos = memchr(ptr, chr, length);
1447                         if (pos == NULL) {
1448                                 if (parser->intoken == TRUE)
1449                                         g_string_append_len(parser->content,
1450                                                         (gchar *) ptr, length);
1451                                 break;
1452                         }
1453
1454                         if (parser->intoken == TRUE)
1455                                 g_string_append_len(parser->content,
1456                                                 (gchar *) ptr, (pos - ptr) + 1);
1457
1458                         length -= (pos - ptr) + 1;
1459                         ptr = pos + 1;
1460
1461                         parser->token_pos++;
1462                         continue;
1463                 }
1464
1465                 if (parser->intoken == TRUE)
1466                         g_string_append_c(parser->content, ptr[0]);
1467
1468                 if (ptr[0] != chr) {
1469                         length--;
1470                         ptr++;
1471
1472                         parser->token_pos = 0;
1473                         continue;
1474                 }
1475
1476                 length--;
1477                 ptr++;
1478
1479                 parser->token_pos++;
1480
1481                 if (parser->token_pos == parser->token_len) {
1482                         if (parser->intoken == FALSE) {
1483                                 g_string_append(parser->content,
1484                                                         parser->token_str);
1485
1486                                 parser->intoken = TRUE;
1487                                 parser->token_str = parser->end_token;
1488                                 parser->token_len = strlen(parser->end_token);
1489                                 parser->token_pos = 0;
1490                         } else {
1491                                 char *str;
1492                                 str = g_string_free(parser->content, FALSE);
1493                                 parser->content = g_string_sized_new(0);
1494                                 if (parser->func)
1495                                         parser->func(str, parser->user_data);
1496                                 g_free(str);
1497
1498                                 parser->intoken = FALSE;
1499                                 parser->token_str = parser->begin_token;
1500                                 parser->token_len = strlen(parser->begin_token);
1501                                 parser->token_pos = 0;
1502                         }
1503                 }
1504         }
1505 }
1506
1507 void g_web_parser_end_data(GWebParser *parser)
1508 {
1509         if (parser == NULL)
1510                 return;
1511 }