3 * Web service library with GLib integration
5 * Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
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.
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.
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
32 #include <sys/socket.h>
33 #include <arpa/inet.h>
35 #include "giognutls.h"
39 #define DEFAULT_BUFFER_SIZE 2048
41 #define SESSION_FLAG_USE_TLS (1 << 0)
67 GIOChannel *transport_channel;
68 guint transport_watch;
74 guint8 *receive_buffer;
77 GString *current_header;
81 gboolean request_started;
83 enum chunk_state chunck_state;
90 GWebResultFunc result_func;
91 GWebInputFunc input_func;
107 gboolean close_connection;
109 GWebDebugFunc debug_func;
113 static inline void debug(GWeb *web, const char *format, ...)
118 if (web->debug_func == NULL)
121 va_start(ap, format);
123 if (vsnprintf(str, sizeof(str), format, ap) > 0)
124 web->debug_func(str, web->debug_data);
129 static void free_session(struct web_session *session)
131 GWeb *web = session->web;
136 g_free(session->request);
138 if (session->resolv_action > 0)
139 g_resolv_cancel_lookup(web->resolv, session->resolv_action);
141 if (session->transport_watch > 0)
142 g_source_remove(session->transport_watch);
144 if (session->send_watch > 0)
145 g_source_remove(session->send_watch);
147 if (session->transport_channel != NULL)
148 g_io_channel_unref(session->transport_channel);
150 g_string_free(session->send_buffer, TRUE);
151 g_string_free(session->current_header, TRUE);
152 g_free(session->receive_buffer);
154 g_free(session->content_type);
156 g_free(session->host);
157 g_free(session->address);
161 static void flush_sessions(GWeb *web)
165 for (list = g_list_first(web->session_list);
166 list; list = g_list_next(list))
167 free_session(list->data);
169 g_list_free(web->session_list);
170 web->session_list = NULL;
173 GWeb *g_web_new(int index)
180 web = g_try_new0(GWeb, 1);
186 web->next_query_id = 1;
189 web->session_list = NULL;
191 web->resolv = g_resolv_new(index);
192 if (web->resolv == NULL) {
197 web->accept_option = g_strdup("*/*");
198 web->user_agent = g_strdup_printf("GWeb/%s", VERSION);
199 web->close_connection = FALSE;
204 GWeb *g_web_ref(GWeb *web)
209 g_atomic_int_inc(&web->ref_count);
214 void g_web_unref(GWeb *web)
219 if (g_atomic_int_dec_and_test(&web->ref_count) == FALSE)
224 g_resolv_unref(web->resolv);
228 g_free(web->accept_option);
229 g_free(web->user_agent);
234 void g_web_set_debug(GWeb *web, GWebDebugFunc func, gpointer user_data)
239 web->debug_func = func;
240 web->debug_data = user_data;
242 g_resolv_set_debug(web->resolv, func, user_data);
245 gboolean g_web_set_proxy(GWeb *web, const char *proxy)
251 web->proxy = g_strdup(proxy);
256 gboolean g_web_add_nameserver(GWeb *web, const char *address)
261 g_resolv_add_nameserver(web->resolv, address, 53, 0);
266 static gboolean set_accept_option(GWeb *web, const char *format, va_list args)
268 g_free(web->accept_option);
270 if (format == NULL) {
271 web->accept_option = NULL;
272 debug(web, "clearing accept option");
274 web->accept_option = g_strdup_vprintf(format, args);
275 debug(web, "setting accept %s", web->accept_option);
281 gboolean g_web_set_accept(GWeb *web, const char *format, ...)
289 va_start(args, format);
290 result = set_accept_option(web, format, args);
296 static gboolean set_user_agent(GWeb *web, const char *format, va_list args)
298 g_free(web->user_agent);
300 if (format == NULL) {
301 web->user_agent = NULL;
302 debug(web, "clearing user agent");
304 web->user_agent = g_strdup_vprintf(format, args);
305 debug(web, "setting user agent %s", web->user_agent);
311 gboolean g_web_set_user_agent(GWeb *web, const char *format, ...)
319 va_start(args, format);
320 result = set_user_agent(web, format, args);
326 void g_web_set_close_connection(GWeb *web, gboolean enabled)
331 web->close_connection = enabled;
334 gboolean g_web_get_close_connection(GWeb *web)
339 return web->close_connection;
342 static inline void call_result_func(struct web_session *session, guint16 status)
344 if (session->result_func == NULL)
348 session->result.status = status;
350 session->result_func(&session->result, session->user_data);
353 static gboolean process_send_buffer(struct web_session *session)
355 GString *buf = session->send_buffer;
356 gsize count, bytes_written;
362 if (session->more_data == FALSE)
363 session->body_done = TRUE;
368 debug(session->web, "bytes to write %zu", count);
370 status = g_io_channel_write_chars(session->transport_channel,
371 buf->str, count, &bytes_written, NULL);
373 debug(session->web, "status %u bytes written %zu",
374 status, bytes_written);
376 if (status != G_IO_STATUS_NORMAL && status != G_IO_STATUS_AGAIN)
379 g_string_erase(buf, 0, bytes_written);
384 static void process_next_chunk(struct web_session *session)
386 GString *buf = session->send_buffer;
390 if (session->input_func == NULL) {
391 session->more_data = FALSE;
395 session->more_data = session->input_func(&body, &length,
399 g_string_append_printf(buf, "%zx\r\n", length);
400 g_string_append_len(buf, (char *) body, length);
401 g_string_append(buf, "\r\n");
404 if (session->more_data == FALSE)
405 g_string_append(buf, "0\r\n\r\n");
408 static void start_request(struct web_session *session)
410 GString *buf = session->send_buffer;
414 debug(session->web, "request %s from %s",
415 session->request, session->host);
417 g_string_truncate(buf, 0);
419 if (session->content_type == NULL)
420 g_string_append_printf(buf, "GET %s HTTP/1.1\r\n",
423 g_string_append_printf(buf, "POST %s HTTP/1.1\r\n",
425 g_string_append_printf(buf, "Host: %s\r\n", session->host);
426 if (session->web->user_agent != NULL)
427 g_string_append_printf(buf, "User-Agent: %s\r\n",
428 session->web->user_agent);
429 if (session->web->accept_option != NULL)
430 g_string_append_printf(buf, "Accept: %s\r\n",
431 session->web->accept_option);
432 if (session->content_type != NULL) {
433 g_string_append_printf(buf, "Content-Type: %s\r\n",
434 session->content_type);
435 if (session->input_func == NULL) {
436 session->more_data = FALSE;
439 session->more_data = session->input_func(&body, &length,
441 if (session->more_data == FALSE)
442 g_string_append_printf(buf, "Content-Length: %zu\r\n",
445 g_string_append(buf, "Transfer-Encoding: chunked\r\n");
447 if (session->web->close_connection == TRUE)
448 g_string_append(buf, "Connection: close\r\n");
449 g_string_append(buf, "\r\n");
451 if (session->content_type != NULL && length > 0) {
452 if (session->more_data == TRUE) {
453 g_string_append_printf(buf, "%zx\r\n", length);
454 g_string_append_len(buf, (char *) body, length);
455 g_string_append(buf, "\r\n");
457 g_string_append_len(buf, (char *) body, length);
461 static gboolean send_data(GIOChannel *channel, GIOCondition cond,
464 struct web_session *session = user_data;
466 if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
467 session->send_watch = 0;
471 if (process_send_buffer(session) == TRUE)
474 if (session->request_started == FALSE) {
475 session->request_started = TRUE;
476 start_request(session);
477 } else if (session->more_data == TRUE)
478 process_next_chunk(session);
480 process_send_buffer(session);
482 if (session->body_done == TRUE) {
483 session->send_watch = 0;
490 static int decode_chunked(struct web_session *session,
491 const guint8 *buf, gsize len)
493 const guint8 *ptr = buf;
501 switch (session->chunck_state) {
503 pos = memchr(ptr, '\n', len);
505 g_string_append_len(session->current_header,
511 if (count < 1 || ptr[count - 1] != '\r')
514 g_string_append_len(session->current_header,
515 (gchar *) ptr, count);
520 str = session->current_header->str;
522 counter = strtoul(str, NULL, 16);
523 if ((counter == 0 && errno == EINVAL) ||
524 counter == ULONG_MAX)
527 session->chunk_size = counter;
528 session->chunk_left = counter;
530 session->chunck_state = CHUNK_DATA;
537 session->chunck_state = CHUNK_N_BODY;
544 session->chunck_state = CHUNK_SIZE;
547 if (session->chunk_size == 0) {
548 debug(session->web, "Download Done in chunk");
549 g_string_truncate(session->current_header, 0);
553 if (session->chunk_left <= len) {
554 session->result.buffer = ptr;
555 session->result.length = session->chunk_left;
556 call_result_func(session, 0);
558 len -= session->chunk_left;
559 ptr += session->chunk_left;
561 session->total_len += session->chunk_left;
562 session->chunk_left = 0;
564 g_string_truncate(session->current_header, 0);
565 session->chunck_state = CHUNK_R_BODY;
569 session->result.buffer = ptr;
570 session->result.length = len;
571 call_result_func(session, 0);
573 session->chunk_left -= len;
574 session->total_len += len;
585 static int handle_body(struct web_session *session,
586 const guint8 *buf, gsize len)
590 debug(session->web, "[body] length %zu", len);
592 if (session->result.use_chunk == FALSE) {
593 session->result.buffer = buf;
594 session->result.length = len;
595 call_result_func(session, 0);
599 err = decode_chunked(session, buf, len);
601 debug(session->web, "Error in chunk decode %d", err);
603 session->result.buffer = NULL;
604 session->result.length = 0;
605 call_result_func(session, 400);
611 static gboolean received_data(GIOChannel *channel, GIOCondition cond,
614 struct web_session *session = user_data;
615 guint8 *ptr = session->receive_buffer;
619 if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
620 session->transport_watch = 0;
621 session->result.buffer = NULL;
622 session->result.length = 0;
623 call_result_func(session, 400);
627 status = g_io_channel_read_chars(channel,
628 (gchar *) session->receive_buffer,
629 session->receive_space - 1, &bytes_read, NULL);
631 debug(session->web, "bytes read %zu", bytes_read);
633 if (status != G_IO_STATUS_NORMAL && status != G_IO_STATUS_AGAIN) {
634 session->transport_watch = 0;
635 session->result.buffer = NULL;
636 session->result.length = 0;
637 call_result_func(session, 0);
641 session->receive_buffer[bytes_read] = '\0';
643 if (session->header_done == TRUE) {
644 if (handle_body(session, session->receive_buffer,
646 session->transport_watch = 0;
652 while (bytes_read > 0) {
657 pos = memchr(ptr, '\n', bytes_read);
659 g_string_append_len(session->current_header,
660 (gchar *) ptr, bytes_read);
665 count = strlen((char *) ptr);
666 if (count > 0 && ptr[count - 1] == '\r') {
671 g_string_append_len(session->current_header,
672 (gchar *) ptr, count);
674 bytes_read -= count + 1;
680 if (session->current_header->len == 0) {
681 session->header_done = TRUE;
682 if (handle_body(session, ptr, bytes_read) < 0) {
683 session->transport_watch = 0;
689 str = session->current_header->str;
691 if (session->result.status == 0) {
694 if (sscanf(str, "HTTP/%*s %u %*s", &code) == 1)
695 session->result.status = code;
696 } else if (session->result.use_chunk == FALSE &&
697 g_ascii_strncasecmp("Transfer-Encoding:",
701 val = g_strrstr(str + 18, "chunked");
703 session->result.use_chunk = TRUE;
705 session->chunck_state = CHUNK_SIZE;
706 session->chunk_left = 0;
707 session->chunk_left = 0;
708 session->total_len = 0;
712 debug(session->web, "[header] %s", str);
714 g_string_truncate(session->current_header, 0);
720 static int connect_session_transport(struct web_session *session)
723 struct sockaddr_in sin;
726 sk = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
730 if (session->flags & SESSION_FLAG_USE_TLS)
731 session->transport_channel = g_io_channel_gnutls_new(sk);
733 session->transport_channel = g_io_channel_unix_new(sk);
735 if (session->transport_channel == NULL) {
740 flags = g_io_channel_get_flags(session->transport_channel);
741 g_io_channel_set_flags(session->transport_channel,
742 flags | G_IO_FLAG_NONBLOCK, NULL);
744 g_io_channel_set_encoding(session->transport_channel, NULL, NULL);
745 g_io_channel_set_buffered(session->transport_channel, FALSE);
747 g_io_channel_set_close_on_unref(session->transport_channel, TRUE);
749 memset(&sin, 0, sizeof(sin));
750 sin.sin_family = AF_INET;
751 sin.sin_port = htons(session->port);
752 sin.sin_addr.s_addr = inet_addr(session->address);
754 if (connect(sk, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
755 if (errno != EINPROGRESS) {
761 session->transport_watch = g_io_add_watch(session->transport_channel,
762 G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
763 received_data, session);
765 session->send_watch = g_io_add_watch(session->transport_channel,
766 G_IO_OUT | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
772 static int create_transport(struct web_session *session)
776 err = connect_session_transport(session);
780 debug(session->web, "creating session %s:%u",
781 session->address, session->port);
786 static int parse_url(struct web_session *session, const char *url)
788 char *scheme, *host, *port, *path;
790 scheme = g_strdup(url);
794 host = strstr(scheme, "://");
799 if (strcasecmp(scheme, "https") == 0) {
801 session->flags |= SESSION_FLAG_USE_TLS;
802 } else if (strcasecmp(scheme, "http") == 0) {
813 path = strchr(host, '/');
817 session->request = g_strdup_printf("/%s", path ? path : "");
819 port = strrchr(host, ':');
822 int tmp = strtol(port + 1, &end, 10);
830 session->host = g_strdup(host);
837 static void resolv_result(GResolvResultStatus status,
838 char **results, gpointer user_data)
840 struct web_session *session = user_data;
842 if (results == NULL || results[0] == NULL) {
843 call_result_func(session, 404);
847 debug(session->web, "address %s", results[0]);
849 if (inet_aton(results[0], NULL) == 0) {
850 call_result_func(session, 400);
854 session->address = g_strdup(results[0]);
856 if (create_transport(session) < 0) {
857 call_result_func(session, 409);
862 static guint do_request(GWeb *web, const char *url,
863 const char *type, GWebInputFunc input,
864 GWebResultFunc func, gpointer user_data)
866 struct web_session *session;
868 if (web == NULL || url == NULL)
871 debug(web, "request %s", url);
873 session = g_try_new0(struct web_session, 1);
877 if (parse_url(session, url) < 0) {
878 free_session(session);
882 debug(web, "host %s:%u", session->host, session->port);
883 debug(web, "flags %lu", session->flags);
886 session->content_type = g_strdup(type);
888 debug(web, "content-type %s", session->content_type);
893 session->result_func = func;
894 session->input_func = input;
895 session->user_data = user_data;
897 session->receive_buffer = g_try_malloc(DEFAULT_BUFFER_SIZE);
898 if (session->receive_buffer == NULL) {
899 free_session(session);
903 session->receive_space = DEFAULT_BUFFER_SIZE;
904 session->send_buffer = g_string_sized_new(0);
905 session->current_header = g_string_sized_new(0);
906 session->header_done = FALSE;
907 session->body_done = FALSE;
909 if (inet_aton(session->host, NULL) == 0) {
910 session->resolv_action = g_resolv_lookup_hostname(web->resolv,
911 session->host, resolv_result, session);
912 if (session->resolv_action == 0) {
913 free_session(session);
917 session->address = g_strdup(session->host);
919 if (create_transport(session) < 0) {
920 free_session(session);
925 web->session_list = g_list_append(web->session_list, session);
927 return web->next_query_id++;
930 guint g_web_request_get(GWeb *web, const char *url,
931 GWebResultFunc func, gpointer user_data)
933 return do_request(web, url, NULL, NULL, func, user_data);
936 guint g_web_request_post(GWeb *web, const char *url,
937 const char *type, GWebInputFunc input,
938 GWebResultFunc func, gpointer user_data)
940 return do_request(web, url, type, input, func, user_data);
943 gboolean g_web_cancel_request(GWeb *web, guint id)
951 guint16 g_web_result_get_status(GWebResult *result)
956 return result->status;
959 gboolean g_web_result_get_chunk(GWebResult *result,
960 const guint8 **chunk, gsize *length)
968 *chunk = result->buffer;
971 *length = result->length;
980 const char *token_str;
989 GWebParser *g_web_parser_new(const char *begin, const char *end,
990 GWebParserFunc func, gpointer user_data)
994 parser = g_try_new0(GWebParser, 1);
998 parser->ref_count = 1;
1000 parser->begin_token = g_strdup(begin);
1001 parser->end_token = g_strdup(end);
1003 if (parser->begin_token == NULL) {
1008 parser->func = func;
1009 parser->user_data = user_data;
1011 parser->token_str = parser->begin_token;
1012 parser->token_len = strlen(parser->token_str);
1013 parser->token_pos = 0;
1015 parser->intoken = FALSE;
1016 parser->content = g_string_sized_new(0);
1021 GWebParser *g_web_parser_ref(GWebParser *parser)
1026 g_atomic_int_inc(&parser->ref_count);
1031 void g_web_parser_unref(GWebParser *parser)
1036 if (g_atomic_int_dec_and_test(&parser->ref_count) == FALSE)
1039 g_string_free(parser->content, TRUE);
1041 g_free(parser->begin_token);
1042 g_free(parser->end_token);
1046 void g_web_parser_feed_data(GWebParser *parser,
1047 const guint8 *data, gsize length)
1049 const guint8 *ptr = data;
1054 while (length > 0) {
1055 guint8 chr = parser->token_str[parser->token_pos];
1057 if (parser->token_pos == 0) {
1060 pos = memchr(ptr, chr, length);
1062 if (parser->intoken == TRUE)
1063 g_string_append_len(parser->content,
1064 (gchar *) ptr, length);
1068 if (parser->intoken == TRUE)
1069 g_string_append_len(parser->content,
1070 (gchar *) ptr, (pos - ptr) + 1);
1072 length -= (pos - ptr) + 1;
1075 parser->token_pos++;
1079 if (parser->intoken == TRUE)
1080 g_string_append_c(parser->content, ptr[0]);
1082 if (ptr[0] != chr) {
1086 parser->token_pos = 0;
1093 parser->token_pos++;
1095 if (parser->token_pos == parser->token_len) {
1096 if (parser->intoken == FALSE) {
1097 g_string_append(parser->content,
1100 parser->intoken = TRUE;
1101 parser->token_str = parser->end_token;
1102 parser->token_len = strlen(parser->end_token);
1103 parser->token_pos = 0;
1106 str = g_string_free(parser->content, FALSE);
1107 parser->content = g_string_sized_new(0);
1109 parser->func(str, parser->user_data);
1112 parser->intoken = FALSE;
1113 parser->token_str = parser->begin_token;
1114 parser->token_len = strlen(parser->begin_token);
1115 parser->token_pos = 0;
1121 void g_web_parser_end_data(GWebParser *parser)