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         status = g_io_channel_write_chars(session->transport_channel,
 433                                         buf->str, count, &bytes_written, NULL);
 434
 435         debug(session->web, "status %u bytes to write %zu bytes written %zu",
 436                                         status, count, bytes_written);
 437
 438         if (status != G_IO_STATUS_NORMAL && status != G_IO_STATUS_AGAIN)
 439                 return FALSE;
 440
 441         g_string_erase(buf, 0, bytes_written);
 442
 443         return TRUE;
 444 }
 445
 446 static void process_next_chunk(struct web_session *session)
 447 {
 448         GString *buf = session->send_buffer;
 449         const guint8 *body;
 450         gsize length;
 451
 452         if (session->input_func == NULL) {
 453                 session->more_data = FALSE;
 454                 return;
 455         }
 456
 457         session->more_data = session->input_func(&body, &length,
 458                                                 session->user_data);
 459
 460         if (length > 0) {
 461                 g_string_append_printf(buf, "%zx\r\n", length);
 462                 g_string_append_len(buf, (char *) body, length);
 463                 g_string_append(buf, "\r\n");
 464         }
 465
 466         if (session->more_data == FALSE)
 467                 g_string_append(buf, "0\r\n\r\n");
 468 }
 469
 470 static void start_request(struct web_session *session)
 471 {
 472         GString *buf = session->send_buffer;
 473         const char *version;
 474         const guint8 *body;
 475         gsize length;
 476
 477         debug(session->web, "request %s from %s",
 478                                         session->request, session->host);
 479
 480         g_string_truncate(buf, 0);
 481
 482         if (session->web->http_version == NULL)
 483                 version = "1.1";
 484         else
 485                 version = session->web->http_version;
 486
 487         if (session->content_type == NULL)
 488                 g_string_append_printf(buf, "GET %s HTTP/%s\r\n",
 489                                                 session->request, version);
 490         else
 491                 g_string_append_printf(buf, "POST %s HTTP/%s\r\n",
 492                                                 session->request, version);
 493
 494         g_string_append_printf(buf, "Host: %s\r\n", session->host);
 495
 496         if (session->web->user_agent != NULL)
 497                 g_string_append_printf(buf, "User-Agent: %s\r\n",
 498                                                 session->web->user_agent);
 499
 500         if (session->web->user_agent_profile != NULL) {
 501                 g_string_append_printf(buf, "x-wap-profile: %s\r\n",
 502                                        session->web->user_agent_profile);
 503         }
 504
 505         if (session->web->accept_option != NULL)
 506                 g_string_append_printf(buf, "Accept: %s\r\n",
 507                                                 session->web->accept_option);
 508
 509         if (session->content_type != NULL) {
 510                 g_string_append_printf(buf, "Content-Type: %s\r\n",
 511                                                         session->content_type);
 512                 if (session->input_func == NULL) {
 513                         session->more_data = FALSE;
 514                         length = 0;
 515                 } else
 516                         session->more_data = session->input_func(&body, &length,
 517                                                         session->user_data);
 518                 if (session->more_data == FALSE)
 519                         g_string_append_printf(buf, "Content-Length: %zu\r\n",
 520                                                                         length);
 521                 else
 522                         g_string_append(buf, "Transfer-Encoding: chunked\r\n");
 523         }
 524
 525         if (session->web->close_connection == TRUE)
 526                 g_string_append(buf, "Connection: close\r\n");
 527
 528         g_string_append(buf, "\r\n");
 529
 530         if (session->content_type != NULL && length > 0) {
 531                 if (session->more_data == TRUE) {
 532                         g_string_append_printf(buf, "%zx\r\n", length);
 533                         g_string_append_len(buf, (char *) body, length);
 534                         g_string_append(buf, "\r\n");
 535                 } else
 536                         g_string_append_len(buf, (char *) body, length);
 537         }
 538 }
 539
 540 static gboolean send_data(GIOChannel *channel, GIOCondition cond,
 541                                                 gpointer user_data)
 542 {
 543         struct web_session *session = user_data;
 544
 545         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
 546                 session->send_watch = 0;
 547                 return FALSE;
 548         }
 549
 550         if (process_send_buffer(session) == TRUE)
 551                 return TRUE;
 552
 553         if (session->request_started == FALSE) {
 554                 session->request_started = TRUE;
 555                 start_request(session);
 556         } else if (session->more_data == TRUE)
 557                 process_next_chunk(session);
 558
 559         process_send_buffer(session);
 560
 561         if (session->body_done == TRUE) {
 562                 session->send_watch = 0;
 563                 return FALSE;
 564         }
 565
 566         return TRUE;
 567 }
 568
 569 static int decode_chunked(struct web_session *session,
 570                                         const guint8 *buf, gsize len)
 571 {
 572         const guint8 *ptr = buf;
 573         gsize counter;
 574
 575         while (len > 0) {
 576                 guint8 *pos;
 577                 gsize count;
 578                 char *str;
 579
 580                 switch (session->chunck_state) {
 581                 case CHUNK_SIZE:
 582                         pos = memchr(ptr, '\n', len);
 583                         if (pos == NULL) {
 584                                 g_string_append_len(session->current_header,
 585                                                 (gchar *) ptr, len);
 586                                 return 0;
 587                         }
 588
 589                         count = pos - ptr;
 590                         if (count < 1 || ptr[count - 1] != '\r')
 591                                 return -EILSEQ;
 592
 593                         g_string_append_len(session->current_header,
 594                                                 (gchar *) ptr, count);
 595
 596                         len -= count + 1;
 597                         ptr = pos + 1;
 598
 599                         str = session->current_header->str;
 600
 601                         counter = strtoul(str, NULL, 16);
 602                         if ((counter == 0 && errno == EINVAL) ||
 603                                                 counter == ULONG_MAX)
 604                                 return -EILSEQ;
 605
 606                         session->chunk_size = counter;
 607                         session->chunk_left = counter;
 608
 609                         session->chunck_state = CHUNK_DATA;
 610                         break;
 611                 case CHUNK_R_BODY:
 612                         if (*ptr != '\r')
 613                                 return -EILSEQ;
 614                         ptr++;
 615                         len--;
 616                         session->chunck_state = CHUNK_N_BODY;
 617                         break;
 618                 case CHUNK_N_BODY:
 619                         if (*ptr != '\n')
 620                                 return -EILSEQ;
 621                         ptr++;
 622                         len--;
 623                         session->chunck_state = CHUNK_SIZE;
 624                         break;
 625                 case CHUNK_DATA:
 626                         if (session->chunk_size == 0) {
 627                                 debug(session->web, "Download Done in chunk");
 628                                 g_string_truncate(session->current_header, 0);
 629                                 return 0;
 630                         }
 631
 632                         if (session->chunk_left <= len) {
 633                                 session->result.buffer = ptr;
 634                                 session->result.length = session->chunk_left;
 635                                 call_result_func(session, 0);
 636
 637                                 len -= session->chunk_left;
 638                                 ptr += session->chunk_left;
 639
 640                                 session->total_len += session->chunk_left;
 641                                 session->chunk_left = 0;
 642
 643                                 g_string_truncate(session->current_header, 0);
 644                                 session->chunck_state = CHUNK_R_BODY;
 645                                 break;
 646                         }
 647                         /* more data */
 648                         session->result.buffer = ptr;
 649                         session->result.length = len;
 650                         call_result_func(session, 0);
 651
 652                         session->chunk_left -= len;
 653                         session->total_len += len;
 654
 655                         len -= len;
 656                         ptr += len;
 657                         break;
 658                 }
 659         }
 660
 661         return 0;
 662 }
 663
 664 static int handle_body(struct web_session *session,
 665                                 const guint8 *buf, gsize len)
 666 {
 667         int err;
 668
 669         debug(session->web, "[body] length %zu", len);
 670
 671         if (session->result.use_chunk == FALSE) {
 672                 if (len > 0) {
 673                         session->result.buffer = buf;
 674                         session->result.length = len;
 675                         call_result_func(session, 0);
 676                 }
 677                 return 0;
 678         }
 679
 680         err = decode_chunked(session, buf, len);
 681         if (err < 0) {
 682                 debug(session->web, "Error in chunk decode %d", err);
 683
 684                 session->result.buffer = NULL;
 685                 session->result.length = 0;
 686                 call_result_func(session, 400);
 687         }
 688
 689         return err;
 690 }
 691
 692 static void handle_multi_line(struct web_session *session)
 693 {
 694         gsize count;
 695         char *str;
 696         gchar *value;
 697
 698         str = session->current_header->str;
 699
 700         if (str[0] != ' ' && str[0] != '\t')
 701                 return;
 702
 703         while (str[0] == ' ' || str[0] == '\t')
 704                 str++;
 705
 706         count = str - session->current_header->str;
 707         if (count > 0) {
 708                 g_string_erase(session->current_header, 0, count);
 709                 g_string_insert_c(session->current_header, 0, ' ');
 710         }
 711
 712         value = g_hash_table_lookup(session->result.headers,
 713                                         session->result.last_key);
 714         if (value != NULL) {
 715                 g_string_insert(session->current_header, 0, value);
 716
 717                 str = session->current_header->str;
 718
 719                 g_hash_table_replace(session->result.headers,
 720                                         g_strdup(session->result.last_key),
 721                                         g_strdup(str));
 722         }
 723 }
 724
 725 static void add_header_field(struct web_session *session)
 726 {
 727         gsize count;
 728         guint8 *pos;
 729         char *str;
 730         gchar *value;
 731         gchar *key;
 732
 733         str = session->current_header->str;
 734
 735         pos = memchr(str, ':', session->current_header->len);
 736         if (pos != NULL) {
 737                 *pos = '\0';
 738                 pos++;
 739
 740                 key = g_strdup(str);
 741
 742                 /* remove preceding white spaces */
 743                 while (*pos == ' ')
 744                         pos++;
 745
 746                 count = (char *) pos - str;
 747
 748                 g_string_erase(session->current_header, 0, count);
 749
 750                 value = g_hash_table_lookup(session->result.headers, key);
 751                 if (value != NULL) {
 752                         g_string_insert_c(session->current_header, 0, ' ');
 753                         g_string_insert_c(session->current_header, 0, ';');
 754
 755                         g_string_insert(session->current_header, 0, value);
 756                 }
 757
 758                 str = session->current_header->str;
 759                 g_hash_table_replace(session->result.headers, key,
 760                                                         g_strdup(str));
 761
 762                 g_free(session->result.last_key);
 763                 session->result.last_key = g_strdup(key);
 764         }
 765 }
 766
 767 static gboolean received_data(GIOChannel *channel, GIOCondition cond,
 768                                                         gpointer user_data)
 769 {
 770         struct web_session *session = user_data;
 771         guint8 *ptr = session->receive_buffer;
 772         gsize bytes_read;
 773         GIOStatus status;
 774
 775         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
 776                 session->transport_watch = 0;
 777                 session->result.buffer = NULL;
 778                 session->result.length = 0;
 779                 call_result_func(session, 400);
 780                 return FALSE;
 781         }
 782
 783         status = g_io_channel_read_chars(channel,
 784                                 (gchar *) session->receive_buffer,
 785                                 session->receive_space - 1, &bytes_read, NULL);
 786
 787         debug(session->web, "bytes read %zu", bytes_read);
 788
 789         if (status != G_IO_STATUS_NORMAL && status != G_IO_STATUS_AGAIN) {
 790                 session->transport_watch = 0;
 791                 session->result.buffer = NULL;
 792                 session->result.length = 0;
 793                 call_result_func(session, 0);
 794                 return FALSE;
 795         }
 796
 797         session->receive_buffer[bytes_read] = '\0';
 798
 799         if (session->header_done == TRUE) {
 800                 if (handle_body(session, session->receive_buffer,
 801                                                         bytes_read) < 0) {
 802                         session->transport_watch = 0;
 803                         return FALSE;
 804                 }
 805                 return TRUE;
 806         }
 807
 808         while (bytes_read > 0) {
 809                 guint8 *pos;
 810                 gsize count;
 811                 char *str;
 812
 813                 pos = memchr(ptr, '\n', bytes_read);
 814                 if (pos == NULL) {
 815                         g_string_append_len(session->current_header,
 816                                                 (gchar *) ptr, bytes_read);
 817                         return TRUE;
 818                 }
 819
 820                 *pos = '\0';
 821                 count = strlen((char *) ptr);
 822                 if (count > 0 && ptr[count - 1] == '\r') {
 823                         ptr[--count] = '\0';
 824                         bytes_read--;
 825                 }
 826
 827                 g_string_append_len(session->current_header,
 828                                                 (gchar *) ptr, count);
 829
 830                 bytes_read -= count + 1;
 831                 if (bytes_read > 0)
 832                         ptr = pos + 1;
 833                 else
 834                         ptr = NULL;
 835
 836                 if (session->current_header->len == 0) {
 837                         char *val;
 838
 839                         session->header_done = TRUE;
 840
 841                         val = g_hash_table_lookup(session->result.headers,
 842                                                         "Transfer-Encoding");
 843                         if (val != NULL) {
 844                                 val = g_strrstr(val, "chunked");
 845                                 if (val != NULL) {
 846                                         session->result.use_chunk = TRUE;
 847
 848                                         session->chunck_state = CHUNK_SIZE;
 849                                         session->chunk_left = 0;
 850                                         session->total_len = 0;
 851                                 }
 852                         }
 853
 854                         if (handle_body(session, ptr, bytes_read) < 0) {
 855                                 session->transport_watch = 0;
 856                                 return FALSE;
 857                         }
 858                         break;
 859                 }
 860
 861                 str = session->current_header->str;
 862
 863                 if (session->result.status == 0) {
 864                         unsigned int code;
 865
 866                         if (sscanf(str, "HTTP/%*s %u %*s", &code) == 1)
 867                                 session->result.status = code;
 868                 }
 869
 870                 debug(session->web, "[header] %s", str);
 871
 872                 /* handle multi-line header */
 873                 if (str[0] == ' ' || str[0] == '\t')
 874                         handle_multi_line(session);
 875                 else
 876                         add_header_field(session);
 877
 878                 g_string_truncate(session->current_header, 0);
 879         }
 880
 881         return TRUE;
 882 }
 883
 884 static int connect_session_transport(struct web_session *session)
 885 {
 886         GIOFlags flags;
 887         int sk;
 888
 889         sk = socket(session->addr->ai_family, SOCK_STREAM, IPPROTO_TCP);
 890         if (sk < 0)
 891                 return -EIO;
 892
 893         if (session->flags & SESSION_FLAG_USE_TLS) {
 894                 debug(session->web, "using TLS encryption");
 895                 session->transport_channel = g_io_channel_gnutls_new(sk);
 896         } else {
 897                 debug(session->web, "no encryption");
 898                 session->transport_channel = g_io_channel_unix_new(sk);
 899         }
 900
 901         if (session->transport_channel == NULL) {
 902                 close(sk);
 903                 return -ENOMEM;
 904         }
 905
 906         flags = g_io_channel_get_flags(session->transport_channel);
 907         g_io_channel_set_flags(session->transport_channel,
 908                                         flags | G_IO_FLAG_NONBLOCK, NULL);
 909
 910         g_io_channel_set_encoding(session->transport_channel, NULL, NULL);
 911         g_io_channel_set_buffered(session->transport_channel, FALSE);
 912
 913         g_io_channel_set_close_on_unref(session->transport_channel, TRUE);
 914
 915         if (connect(sk, session->addr->ai_addr,
 916                         session->addr->ai_addrlen) < 0) {
 917                 if (errno != EINPROGRESS) {
 918                         close(sk);
 919                         return -EIO;
 920                 }
 921         }
 922
 923         session->transport_watch = g_io_add_watch(session->transport_channel,
 924                                 G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
 925                                                 received_data, session);
 926
 927         session->send_watch = g_io_add_watch(session->transport_channel,
 928                                 G_IO_OUT | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
 929                                                 send_data, session);
 930
 931         return 0;
 932 }
 933
 934 static int create_transport(struct web_session *session)
 935 {
 936         int err;
 937
 938         err = connect_session_transport(session);
 939         if (err < 0)
 940                 return err;
 941
 942         debug(session->web, "creating session %s:%u",
 943                                         session->address, session->port);
 944
 945         return 0;
 946 }
 947
 948 static int parse_url(struct web_session *session,
 949                                 const char *url, const char *proxy)
 950 {
 951         char *scheme, *host, *port, *path;
 952
 953         scheme = g_strdup(url);
 954         if (scheme == NULL)
 955                 return -EINVAL;
 956
 957         host = strstr(scheme, "://");
 958         if (host != NULL) {
 959                 *host = '\0';
 960                 host += 3;
 961
 962                 if (strcasecmp(scheme, "https") == 0) {
 963                         session->port = 443;
 964                         session->flags |= SESSION_FLAG_USE_TLS;
 965                 } else if (strcasecmp(scheme, "http") == 0) {
 966                         session->port = 80;
 967                 } else {
 968                         g_free(scheme);
 969                         return -EINVAL;
 970                 }
 971         } else {
 972                 host = scheme;
 973                 session->port = 80;
 974         }
 975
 976         path = strchr(host, '/');
 977         if (path != NULL)
 978                 *(path++) = '\0';
 979
 980         if (proxy == NULL)
 981                 session->request = g_strdup_printf("/%s", path ? path : "");
 982         else
 983                 session->request = g_strdup(url);
 984
 985         port = strrchr(host, ':');
 986         if (port != NULL) {
 987                 char *end;
 988                 int tmp = strtol(port + 1, &end, 10);
 989
 990                 if (*end == '\0') {
 991                         *port = '\0';
 992                         session->port = tmp;
 993                 }
 994
 995                 if (proxy == NULL)
 996                         session->host = g_strdup(host);
 997                 else
 998                         session->host = g_strdup_printf("%s:%u", host, tmp);
 999         } else
1000                 session->host = g_strdup(host);
1001
1002         g_free(scheme);
1003
1004         if (proxy == NULL)
1005                 return 0;
1006
1007         scheme = g_strdup(proxy);
1008         if (scheme == NULL)
1009                 return -EINVAL;
1010
1011         host = strstr(proxy, "://");
1012         if (host != NULL) {
1013                 *host = '\0';
1014                 host += 3;
1015
1016                 if (strcasecmp(scheme, "http") != 0) {
1017                         g_free(scheme);
1018                         return -EINVAL;
1019                 }
1020         } else
1021                 host = scheme;
1022
1023         path = strchr(host, '/');
1024         if (path != NULL)
1025                 *(path++) = '\0';
1026
1027         port = strrchr(host, ':');
1028         if (port != NULL) {
1029                 char *end;
1030                 int tmp = strtol(port + 1, &end, 10);
1031
1032                 if (*end == '\0') {
1033                         *port = '\0';
1034                         session->port = tmp;
1035                 }
1036         }
1037
1038         session->address = g_strdup(host);
1039
1040         g_free(scheme);
1041
1042         return 0;
1043 }
1044
1045 static void resolv_result(GResolvResultStatus status,
1046                                         char **results, gpointer user_data)
1047 {
1048         struct web_session *session = user_data;
1049         struct addrinfo hints;
1050         char *port;
1051         int ret;
1052
1053         if (results == NULL || results[0] == NULL) {
1054                 call_result_func(session, 404);
1055                 return;
1056         }
1057
1058         debug(session->web, "address %s", results[0]);
1059
1060         memset(&hints, 0, sizeof(struct addrinfo));
1061         hints.ai_flags = AI_NUMERICHOST;
1062
1063         if (session->addr != NULL) {
1064                 freeaddrinfo(session->addr);
1065                 session->addr = NULL;
1066         }
1067
1068         port = g_strdup_printf("%u", session->port);
1069         ret = getaddrinfo(results[0], port, &hints, &session->addr);
1070         g_free(port);
1071         if (ret != 0 || session->addr == NULL) {
1072                 call_result_func(session, 400);
1073                 return;
1074         }
1075
1076         session->address = g_strdup(results[0]);
1077
1078         if (create_transport(session) < 0) {
1079                 call_result_func(session, 409);
1080                 return;
1081         }
1082 }
1083
1084 static guint do_request(GWeb *web, const char *url,
1085                                 const char *type, GWebInputFunc input,
1086                                 GWebResultFunc func, gpointer user_data)
1087 {
1088         struct web_session *session;
1089
1090         if (web == NULL || url == NULL)
1091                 return 0;
1092
1093         debug(web, "request %s", url);
1094
1095         session = g_try_new0(struct web_session, 1);
1096         if (session == NULL)
1097                 return 0;
1098
1099         if (parse_url(session, url, web->proxy) < 0) {
1100                 free_session(session);
1101                 return 0;
1102         }
1103
1104         debug(web, "address %s", session->address);
1105         debug(web, "port %u", session->port);
1106         debug(web, "host %s", session->host);
1107         debug(web, "flags %lu", session->flags);
1108         debug(web, "request %s", session->request);
1109
1110         if (type != NULL) {
1111                 session->content_type = g_strdup(type);
1112
1113                 debug(web, "content-type %s", session->content_type);
1114         }
1115
1116         session->web = web;
1117
1118         session->result_func = func;
1119         session->input_func = input;
1120         session->user_data = user_data;
1121
1122         session->receive_buffer = g_try_malloc(DEFAULT_BUFFER_SIZE);
1123         if (session->receive_buffer == NULL) {
1124                 free_session(session);
1125                 return 0;
1126         }
1127
1128         session->result.headers = g_hash_table_new_full(g_str_hash, g_str_equal,
1129                                                         g_free, g_free);
1130         if (session->result.headers == NULL) {
1131                 free_session(session);
1132                 return 0;
1133         }
1134
1135         session->receive_space = DEFAULT_BUFFER_SIZE;
1136         session->send_buffer = g_string_sized_new(0);
1137         session->current_header = g_string_sized_new(0);
1138         session->header_done = FALSE;
1139         session->body_done = FALSE;
1140
1141         if (session->address == NULL && inet_aton(session->host, NULL) == 0) {
1142                 session->resolv_action = g_resolv_lookup_hostname(web->resolv,
1143                                         session->host, resolv_result, session);
1144                 if (session->resolv_action == 0) {
1145                         free_session(session);
1146                         return 0;
1147                 }
1148         } else {
1149                 struct addrinfo hints;
1150                 char *port;
1151                 int ret;
1152
1153                 if (session->address == NULL)
1154                         session->address = g_strdup(session->host);
1155
1156                 memset(&hints, 0, sizeof(struct addrinfo));
1157                 hints.ai_flags = AI_NUMERICHOST;
1158
1159                 if (session->addr != NULL) {
1160                         freeaddrinfo(session->addr);
1161                         session->addr = NULL;
1162                 }
1163
1164                 port = g_strdup_printf("%u", session->port);
1165                 ret = getaddrinfo(session->address, port, &hints,
1166                                                         &session->addr);
1167                 g_free(port);
1168                 if (ret != 0 || session->addr == NULL) {
1169                         free_session(session);
1170                         return 0;
1171                 }
1172
1173                 if (create_transport(session) < 0) {
1174                         free_session(session);
1175                         return 0;
1176                 }
1177         }
1178
1179         web->session_list = g_list_append(web->session_list, session);
1180
1181         return web->next_query_id++;
1182 }
1183
1184 guint g_web_request_get(GWeb *web, const char *url,
1185                                 GWebResultFunc func, gpointer user_data)
1186 {
1187         return do_request(web, url, NULL, NULL, func, user_data);
1188 }
1189
1190 guint g_web_request_post(GWeb *web, const char *url,
1191                                 const char *type, GWebInputFunc input,
1192                                 GWebResultFunc func, gpointer user_data)
1193 {
1194         return do_request(web, url, type, input, func, user_data);
1195 }
1196
1197 gboolean g_web_cancel_request(GWeb *web, guint id)
1198 {
1199         if (web == NULL)
1200                 return FALSE;
1201
1202         return TRUE;
1203 }
1204
1205 guint16 g_web_result_get_status(GWebResult *result)
1206 {
1207         if (result == NULL)
1208                 return 0;
1209
1210         return result->status;
1211 }
1212
1213 gboolean g_web_result_get_chunk(GWebResult *result,
1214                                 const guint8 **chunk, gsize *length)
1215 {
1216         if (result == NULL)
1217                 return FALSE;
1218
1219         if (chunk == NULL)
1220                 return FALSE;
1221
1222         *chunk = result->buffer;
1223
1224         if (length != NULL)
1225                 *length = result->length;
1226
1227         return TRUE;
1228 }
1229
1230 gboolean g_web_result_get_header(GWebResult *result,
1231                                 const char *header, const char **value)
1232 {
1233         if (result == NULL)
1234                 return FALSE;
1235
1236         if (value == NULL)
1237                 return FALSE;
1238
1239         *value = g_hash_table_lookup(result->headers, header);
1240
1241         if (*value == NULL)
1242                 return FALSE;
1243
1244         return TRUE;
1245 }
1246
1247 struct _GWebParser {
1248         gint ref_count;
1249         char *begin_token;
1250         char *end_token;
1251         const char *token_str;
1252         size_t token_len;
1253         size_t token_pos;
1254         gboolean intoken;
1255         GString *content;
1256         GWebParserFunc func;
1257         gpointer user_data;
1258 };
1259
1260 GWebParser *g_web_parser_new(const char *begin, const char *end,
1261                                 GWebParserFunc func, gpointer user_data)
1262 {
1263         GWebParser *parser;
1264
1265         parser = g_try_new0(GWebParser, 1);
1266         if (parser == NULL)
1267                 return NULL;
1268
1269         parser->ref_count = 1;
1270
1271         parser->begin_token = g_strdup(begin);
1272         parser->end_token = g_strdup(end);
1273
1274         if (parser->begin_token == NULL) {
1275                 g_free(parser);
1276                 return NULL;
1277         }
1278
1279         parser->func = func;
1280         parser->user_data = user_data;
1281
1282         parser->token_str = parser->begin_token;
1283         parser->token_len = strlen(parser->token_str);
1284         parser->token_pos = 0;
1285
1286         parser->intoken = FALSE;
1287         parser->content = g_string_sized_new(0);
1288
1289         return parser;
1290 }
1291
1292 GWebParser *g_web_parser_ref(GWebParser *parser)
1293 {
1294         if (parser == NULL)
1295                 return NULL;
1296
1297         g_atomic_int_inc(&parser->ref_count);
1298
1299         return parser;
1300 }
1301
1302 void g_web_parser_unref(GWebParser *parser)
1303 {
1304         if (parser == NULL)
1305                 return;
1306
1307         if (g_atomic_int_dec_and_test(&parser->ref_count) == FALSE)
1308                 return;
1309
1310         g_string_free(parser->content, TRUE);
1311
1312         g_free(parser->begin_token);
1313         g_free(parser->end_token);
1314         g_free(parser);
1315 }
1316
1317 void g_web_parser_feed_data(GWebParser *parser,
1318                                 const guint8 *data, gsize length)
1319 {
1320         const guint8 *ptr = data;
1321
1322         if (parser == NULL)
1323                 return;
1324
1325         while (length > 0) {
1326                 guint8 chr = parser->token_str[parser->token_pos];
1327
1328                 if (parser->token_pos == 0) {
1329                         guint8 *pos;
1330
1331                         pos = memchr(ptr, chr, length);
1332                         if (pos == NULL) {
1333                                 if (parser->intoken == TRUE)
1334                                         g_string_append_len(parser->content,
1335                                                         (gchar *) ptr, length);
1336                                 break;
1337                         }
1338
1339                         if (parser->intoken == TRUE)
1340                                 g_string_append_len(parser->content,
1341                                                 (gchar *) ptr, (pos - ptr) + 1);
1342
1343                         length -= (pos - ptr) + 1;
1344                         ptr = pos + 1;
1345
1346                         parser->token_pos++;
1347                         continue;
1348                 }
1349
1350                 if (parser->intoken == TRUE)
1351                         g_string_append_c(parser->content, ptr[0]);
1352
1353                 if (ptr[0] != chr) {
1354                         length--;
1355                         ptr++;
1356
1357                         parser->token_pos = 0;
1358                         continue;
1359                 }
1360
1361                 length--;
1362                 ptr++;
1363
1364                 parser->token_pos++;
1365
1366                 if (parser->token_pos == parser->token_len) {
1367                         if (parser->intoken == FALSE) {
1368                                 g_string_append(parser->content,
1369                                                         parser->token_str);
1370
1371                                 parser->intoken = TRUE;
1372                                 parser->token_str = parser->end_token;
1373                                 parser->token_len = strlen(parser->end_token);
1374                                 parser->token_pos = 0;
1375                         } else {
1376                                 char *str;
1377                                 str = g_string_free(parser->content, FALSE);
1378                                 parser->content = g_string_sized_new(0);
1379                                 if (parser->func)
1380                                         parser->func(str, parser->user_data);
1381                                 g_free(str);
1382
1383                                 parser->intoken = FALSE;
1384                                 parser->token_str = parser->begin_token;
1385                                 parser->token_len = strlen(parser->begin_token);
1386                                 parser->token_pos = 0;
1387                         }
1388                 }
1389         }
1390 }
1391
1392 void g_web_parser_end_data(GWebParser *parser)
1393 {
1394         if (parser == NULL)
1395                 return;
1396 }