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