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;
76 GString *current_header;
79 gboolean request_started;
81 enum chunk_state chunck_state;
88 GWebResultFunc result_func;
89 GWebInputFunc input_func;
105 gboolean close_connection;
107 GWebDebugFunc debug_func;
111 static inline void debug(GWeb *web, const char *format, ...)
116 if (web->debug_func == NULL)
119 va_start(ap, format);
121 if (vsnprintf(str, sizeof(str), format, ap) > 0)
122 web->debug_func(str, web->debug_data);
127 static void free_session(struct web_session *session)
129 GWeb *web = session->web;
134 g_free(session->request);
136 if (session->resolv_action > 0)
137 g_resolv_cancel_lookup(web->resolv, session->resolv_action);
139 if (session->transport_watch > 0)
140 g_source_remove(session->transport_watch);
142 if (session->send_watch > 0)
143 g_source_remove(session->send_watch);
145 if (session->transport_channel != NULL)
146 g_io_channel_unref(session->transport_channel);
148 g_string_free(session->current_header, TRUE);
149 g_free(session->receive_buffer);
151 g_free(session->content_type);
153 g_free(session->host);
154 g_free(session->address);
158 static void flush_sessions(GWeb *web)
162 for (list = g_list_first(web->session_list);
163 list; list = g_list_next(list))
164 free_session(list->data);
166 g_list_free(web->session_list);
167 web->session_list = NULL;
170 GWeb *g_web_new(int index)
177 web = g_try_new0(GWeb, 1);
183 web->next_query_id = 1;
186 web->session_list = NULL;
188 web->resolv = g_resolv_new(index);
189 if (web->resolv == NULL) {
194 web->accept_option = g_strdup("*/*");
195 web->user_agent = g_strdup_printf("GWeb/%s", VERSION);
196 web->close_connection = FALSE;
201 GWeb *g_web_ref(GWeb *web)
206 g_atomic_int_inc(&web->ref_count);
211 void g_web_unref(GWeb *web)
216 if (g_atomic_int_dec_and_test(&web->ref_count) == FALSE)
221 g_resolv_unref(web->resolv);
225 g_free(web->accept_option);
226 g_free(web->user_agent);
231 void g_web_set_debug(GWeb *web, GWebDebugFunc func, gpointer user_data)
236 web->debug_func = func;
237 web->debug_data = user_data;
239 g_resolv_set_debug(web->resolv, func, user_data);
242 gboolean g_web_set_proxy(GWeb *web, const char *proxy)
248 web->proxy = g_strdup(proxy);
253 gboolean g_web_add_nameserver(GWeb *web, const char *address)
258 g_resolv_add_nameserver(web->resolv, address, 53, 0);
263 static gboolean set_accept_option(GWeb *web, const char *format, va_list args)
265 g_free(web->accept_option);
267 if (format == NULL) {
268 web->accept_option = NULL;
269 debug(web, "clearing accept option");
271 web->accept_option = g_strdup_vprintf(format, args);
272 debug(web, "setting accept %s", web->accept_option);
278 gboolean g_web_set_accept(GWeb *web, const char *format, ...)
286 va_start(args, format);
287 result = set_accept_option(web, format, args);
293 static gboolean set_user_agent(GWeb *web, const char *format, va_list args)
295 g_free(web->user_agent);
297 if (format == NULL) {
298 web->user_agent = NULL;
299 debug(web, "clearing user agent");
301 web->user_agent = g_strdup_vprintf(format, args);
302 debug(web, "setting user agent %s", web->user_agent);
308 gboolean g_web_set_user_agent(GWeb *web, const char *format, ...)
316 va_start(args, format);
317 result = set_user_agent(web, format, args);
323 void g_web_set_close_connection(GWeb *web, gboolean enabled)
328 web->close_connection = enabled;
331 gboolean g_web_get_close_connection(GWeb *web)
336 return web->close_connection;
339 static inline void call_result_func(struct web_session *session, guint16 status)
341 if (session->result_func == NULL)
345 session->result.status = status;
347 session->result_func(&session->result, session->user_data);
350 static void process_next_chunk(struct web_session *session)
356 gsize count, bytes_written;
359 if (session->input_func == NULL) {
360 session->more_data = FALSE;
364 session->more_data = session->input_func(&body, &length,
367 buf = g_string_new(NULL);
370 g_string_append_printf(buf, "%zx\r\n", length);
371 g_string_append_len(buf, (char *) body, length);
372 g_string_append(buf, "\r\n");
375 if (session->more_data == FALSE)
376 g_string_append(buf, "0\r\n\r\n");
379 str = g_string_free(buf, FALSE);
382 status = g_io_channel_write_chars(session->transport_channel,
383 str, count, &bytes_written, NULL);
385 debug(session->web, "status %u bytes written %zu",
386 status, bytes_written);
392 static void start_request(struct web_session *session)
398 gsize count, bytes_written;
401 debug(session->web, "request %s from %s",
402 session->request, session->host);
404 buf = g_string_new(NULL);
406 if (session->content_type == NULL)
407 g_string_append_printf(buf, "GET %s HTTP/1.1\r\n",
410 g_string_append_printf(buf, "POST %s HTTP/1.1\r\n",
412 g_string_append_printf(buf, "Host: %s\r\n", session->host);
413 if (session->web->user_agent != NULL)
414 g_string_append_printf(buf, "User-Agent: %s\r\n",
415 session->web->user_agent);
416 if (session->web->accept_option != NULL)
417 g_string_append_printf(buf, "Accept: %s\r\n",
418 session->web->accept_option);
419 if (session->content_type != NULL) {
420 g_string_append_printf(buf, "Content-Type: %s\r\n",
421 session->content_type);
422 if (session->input_func == NULL) {
423 session->more_data = FALSE;
426 session->more_data = session->input_func(&body, &length,
428 if (session->more_data == FALSE)
429 g_string_append_printf(buf, "Content-Length: %zu\r\n",
432 g_string_append(buf, "Transfer-Encoding: chunked\r\n");
434 if (session->web->close_connection == TRUE)
435 g_string_append(buf, "Connection: close\r\n");
436 g_string_append(buf, "\r\n");
438 if (session->content_type != NULL && length > 0) {
439 if (session->more_data == TRUE) {
440 g_string_append_printf(buf, "%zx\r\n", length);
441 g_string_append_len(buf, (char *) body, length);
442 g_string_append(buf, "\r\n");
444 g_string_append_len(buf, (char *) body, length);
448 str = g_string_free(buf, FALSE);
450 debug(session->web, "bytes to write %zu", count);
452 status = g_io_channel_write_chars(session->transport_channel,
453 str, count, &bytes_written, NULL);
455 debug(session->web, "status %u bytes written %zu",
456 status, bytes_written);
463 static gboolean send_data(GIOChannel *channel, GIOCondition cond,
466 struct web_session *session = user_data;
468 if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
469 session->send_watch = 0;
473 if (session->request_started == FALSE) {
474 session->request_started = TRUE;
475 start_request(session);
476 } else if (session->more_data == TRUE)
477 process_next_chunk(session);
479 if (session->more_data == TRUE)
482 session->send_watch = 0;
487 static int decode_chunked(struct web_session *session,
488 const guint8 *buf, gsize len)
490 const guint8 *ptr = buf;
498 switch (session->chunck_state) {
500 pos = memchr(ptr, '\n', len);
502 g_string_append_len(session->current_header,
508 if (count < 1 || ptr[count - 1] != '\r')
511 g_string_append_len(session->current_header,
512 (gchar *) ptr, count);
517 str = session->current_header->str;
519 counter = strtoul(str, NULL, 16);
520 if ((counter == 0 && errno == EINVAL) ||
521 counter == ULONG_MAX)
524 session->chunk_size = counter;
525 session->chunk_left = counter;
527 session->chunck_state = CHUNK_DATA;
534 session->chunck_state = CHUNK_N_BODY;
541 session->chunck_state = CHUNK_SIZE;
544 if (session->chunk_size == 0) {
545 debug(session->web, "Download Done in chunk");
546 g_string_truncate(session->current_header, 0);
550 if (session->chunk_left <= len) {
551 session->result.buffer = ptr;
552 session->result.length = session->chunk_left;
553 call_result_func(session, 0);
555 len -= session->chunk_left;
556 ptr += session->chunk_left;
558 session->total_len += session->chunk_left;
559 session->chunk_left = 0;
561 g_string_truncate(session->current_header, 0);
562 session->chunck_state = CHUNK_R_BODY;
566 session->result.buffer = ptr;
567 session->result.length = len;
568 call_result_func(session, 0);
570 session->chunk_left -= len;
571 session->total_len += len;
582 static int handle_body(struct web_session *session,
583 const guint8 *buf, gsize len)
587 if (session->result.use_chunk == FALSE) {
588 session->result.buffer = buf;
589 session->result.length = len;
590 call_result_func(session, 0);
594 err = decode_chunked(session, buf, len);
596 debug(session->web, "Error in chunk decode %d", err);
598 session->result.buffer = NULL;
599 session->result.length = 0;
600 call_result_func(session, 400);
606 static gboolean received_data(GIOChannel *channel, GIOCondition cond,
609 struct web_session *session = user_data;
610 guint8 *ptr = session->receive_buffer;
614 if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
615 session->transport_watch = 0;
616 session->result.buffer = NULL;
617 session->result.length = 0;
618 call_result_func(session, 400);
622 status = g_io_channel_read_chars(channel,
623 (gchar *) session->receive_buffer,
624 session->receive_space - 1, &bytes_read, NULL);
626 debug(session->web, "bytes read %zu", bytes_read);
628 if (status != G_IO_STATUS_NORMAL) {
629 session->transport_watch = 0;
630 session->result.buffer = NULL;
631 session->result.length = 0;
632 call_result_func(session, 0);
636 session->receive_buffer[bytes_read] = '\0';
638 if (session->header_done == TRUE) {
639 if (handle_body(session,
640 session->receive_buffer, bytes_read) < 0) {
641 session->transport_watch = 0;
647 while (bytes_read > 0) {
652 pos = memchr(ptr, '\n', bytes_read);
654 g_string_append_len(session->current_header,
655 (gchar *) ptr, bytes_read);
660 count = strlen((char *) ptr);
661 if (count > 0 && ptr[count - 1] == '\r') {
666 g_string_append_len(session->current_header,
667 (gchar *) ptr, count);
669 bytes_read -= count + 1;
675 if (session->current_header->len == 0) {
676 session->header_done = TRUE;
677 if (handle_body(session, ptr, bytes_read) < 0) {
678 session->transport_watch = 0;
684 str = session->current_header->str;
686 if (session->result.status == 0) {
689 if (sscanf(str, "HTTP/%*s %u %*s", &code) == 1)
690 session->result.status = code;
691 } else if (session->result.use_chunk == FALSE &&
692 g_ascii_strncasecmp("Transfer-Encoding:",
696 val = g_strrstr(str + 18, "chunked");
698 session->result.use_chunk = TRUE;
700 session->chunck_state = CHUNK_SIZE;
701 session->chunk_left = 0;
702 session->chunk_left = 0;
703 session->total_len = 0;
707 debug(session->web, "[header] %s", str);
709 g_string_truncate(session->current_header, 0);
715 static int connect_session_transport(struct web_session *session)
717 struct sockaddr_in sin;
720 sk = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
724 memset(&sin, 0, sizeof(sin));
725 sin.sin_family = AF_INET;
726 sin.sin_port = htons(session->port);
727 sin.sin_addr.s_addr = inet_addr(session->address);
729 if (session->flags & SESSION_FLAG_USE_TLS)
730 session->transport_channel = g_io_channel_gnutls_new(sk);
732 session->transport_channel = g_io_channel_unix_new(sk);
734 if (session->transport_channel == NULL) {
739 g_io_channel_set_flags(session->transport_channel,
740 G_IO_FLAG_NONBLOCK, NULL);
741 g_io_channel_set_encoding(session->transport_channel, NULL, NULL);
742 g_io_channel_set_buffered(session->transport_channel, FALSE);
744 g_io_channel_set_close_on_unref(session->transport_channel, TRUE);
746 if (connect(sk, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
747 if (errno != EINPROGRESS) {
753 session->transport_watch = g_io_add_watch(session->transport_channel,
754 G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
755 received_data, session);
757 session->send_watch = g_io_add_watch(session->transport_channel,
758 G_IO_OUT | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
764 static int create_transport(struct web_session *session)
768 err = connect_session_transport(session);
772 debug(session->web, "creating session %s:%u",
773 session->address, session->port);
778 static int parse_url(struct web_session *session, const char *url)
780 char *scheme, *host, *port, *path;
782 scheme = g_strdup(url);
786 host = strstr(scheme, "://");
791 if (strcasecmp(scheme, "https") == 0) {
793 session->flags |= SESSION_FLAG_USE_TLS;
794 } else if (strcasecmp(scheme, "http") == 0) {
805 path = strchr(host, '/');
809 session->request = g_strdup_printf("/%s", path ? path : "");
811 port = strrchr(host, ':');
814 int tmp = strtol(port + 1, &end, 10);
822 session->host = g_strdup(host);
829 static void resolv_result(GResolvResultStatus status,
830 char **results, gpointer user_data)
832 struct web_session *session = user_data;
834 if (results == NULL || results[0] == NULL) {
835 call_result_func(session, 404);
839 debug(session->web, "address %s", results[0]);
841 if (inet_aton(results[0], NULL) == 0) {
842 call_result_func(session, 400);
846 session->address = g_strdup(results[0]);
848 if (create_transport(session) < 0) {
849 call_result_func(session, 409);
854 static guint do_request(GWeb *web, const char *url,
855 const char *type, GWebInputFunc input,
856 GWebResultFunc func, gpointer user_data)
858 struct web_session *session;
860 if (web == NULL || url == NULL)
863 debug(web, "request %s", url);
865 session = g_try_new0(struct web_session, 1);
869 if (parse_url(session, url) < 0) {
870 free_session(session);
874 debug(web, "host %s:%u", session->host, session->port);
875 debug(web, "flags %lu", session->flags);
878 session->content_type = g_strdup(type);
880 debug(web, "content-type %s", session->content_type);
885 session->result_func = func;
886 session->input_func = input;
887 session->user_data = user_data;
889 session->receive_buffer = g_try_malloc(DEFAULT_BUFFER_SIZE);
890 if (session->receive_buffer == NULL) {
891 free_session(session);
895 session->receive_space = DEFAULT_BUFFER_SIZE;
896 session->current_header = g_string_sized_new(0);
897 session->header_done = FALSE;
899 if (inet_aton(session->host, NULL) == 0) {
900 session->resolv_action = g_resolv_lookup_hostname(web->resolv,
901 session->host, resolv_result, session);
902 if (session->resolv_action == 0) {
903 free_session(session);
907 session->address = g_strdup(session->host);
909 if (create_transport(session) < 0) {
910 free_session(session);
915 web->session_list = g_list_append(web->session_list, session);
917 return web->next_query_id++;
920 guint g_web_request_get(GWeb *web, const char *url,
921 GWebResultFunc func, gpointer user_data)
923 return do_request(web, url, NULL, NULL, func, user_data);
926 guint g_web_request_post(GWeb *web, const char *url,
927 const char *type, GWebInputFunc input,
928 GWebResultFunc func, gpointer user_data)
930 return do_request(web, url, type, input, func, user_data);
933 gboolean g_web_cancel_request(GWeb *web, guint id)
941 guint16 g_web_result_get_status(GWebResult *result)
946 return result->status;
949 gboolean g_web_result_get_chunk(GWebResult *result,
950 const guint8 **chunk, gsize *length)
958 *chunk = result->buffer;
961 *length = result->length;
970 const char *token_str;
979 GWebParser *g_web_parser_new(const char *begin, const char *end,
980 GWebParserFunc func, gpointer user_data)
984 parser = g_try_new0(GWebParser, 1);
988 parser->ref_count = 1;
990 parser->begin_token = g_strdup(begin);
991 parser->end_token = g_strdup(end);
993 if (parser->begin_token == NULL) {
999 parser->user_data = user_data;
1001 parser->token_str = parser->begin_token;
1002 parser->token_len = strlen(parser->token_str);
1003 parser->token_pos = 0;
1005 parser->intoken = FALSE;
1006 parser->content = g_string_sized_new(0);
1011 GWebParser *g_web_parser_ref(GWebParser *parser)
1016 g_atomic_int_inc(&parser->ref_count);
1021 void g_web_parser_unref(GWebParser *parser)
1026 if (g_atomic_int_dec_and_test(&parser->ref_count) == FALSE)
1029 g_string_free(parser->content, TRUE);
1031 g_free(parser->begin_token);
1032 g_free(parser->end_token);
1036 void g_web_parser_feed_data(GWebParser *parser,
1037 const guint8 *data, gsize length)
1039 const guint8 *ptr = data;
1044 while (length > 0) {
1045 guint8 chr = parser->token_str[parser->token_pos];
1047 if (parser->token_pos == 0) {
1050 pos = memchr(ptr, chr, length);
1052 if (parser->intoken == TRUE)
1053 g_string_append_len(parser->content,
1054 (gchar *) ptr, length);
1058 if (parser->intoken == TRUE)
1059 g_string_append_len(parser->content,
1060 (gchar *) ptr, (pos - ptr) + 1);
1062 length -= (pos - ptr) + 1;
1065 parser->token_pos++;
1069 if (parser->intoken == TRUE)
1070 g_string_append_c(parser->content, ptr[0]);
1072 if (ptr[0] != chr) {
1076 parser->token_pos = 0;
1083 parser->token_pos++;
1085 if (parser->token_pos == parser->token_len) {
1086 if (parser->intoken == FALSE) {
1087 g_string_append(parser->content,
1090 parser->intoken = TRUE;
1091 parser->token_str = parser->end_token;
1092 parser->token_len = strlen(parser->end_token);
1093 parser->token_pos = 0;
1096 str = g_string_free(parser->content, FALSE);
1097 parser->content = g_string_sized_new(0);
1099 parser->func(str, parser->user_data);
1102 parser->intoken = FALSE;
1103 parser->token_str = parser->begin_token;
1104 parser->token_len = strlen(parser->begin_token);
1105 parser->token_pos = 0;
1111 void g_web_parser_end_data(GWebParser *parser)