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