diff options
Diffstat (limited to 'protocols/Gadu-Gadu/src/libgadu/http.c')
| -rw-r--r-- | protocols/Gadu-Gadu/src/libgadu/http.c | 544 |
1 files changed, 544 insertions, 0 deletions
diff --git a/protocols/Gadu-Gadu/src/libgadu/http.c b/protocols/Gadu-Gadu/src/libgadu/http.c new file mode 100644 index 0000000000..c070b3ee53 --- /dev/null +++ b/protocols/Gadu-Gadu/src/libgadu/http.c @@ -0,0 +1,544 @@ +/* coding: UTF-8 */
+/* $Id: http.c 11370 2010-03-13 16:17:54Z dezred $ */
+
+/*
+ * (C) Copyright 2001-2002 Wojtek Kaniewski <wojtekka@irc.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License Version
+ * 2.1 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+/**
+ * \file http.c
+ *
+ * \brief Obsługa połączeń HTTP
+ */
+
+#include <sys/types.h>
+#ifdef _WIN32
+#include "win32.h"
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#endif /* _WIN32 */
+
+#include "compat.h"
+#include "libgadu.h"
+#include "resolver.h"
+
+#include <ctype.h>
+#include <errno.h>
+#ifndef _WIN32
+#include <netdb.h>
+#endif /* _WIN32 */
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifndef _WIN32
+#include <unistd.h>
+#endif /* _WIN32 */
+
+/**
+ * Rozpoczyna połączenie HTTP.
+ *
+ * Funkcja przeprowadza połączenie HTTP przy połączeniu synchronicznym,
+ * zwracając wynik w polach struktury \c gg_http, lub błąd, gdy sesja się
+ * nie powiedzie.
+ *
+ * Przy połączeniu asynchronicznym, funkcja rozpoczyna połączenie, a dalsze
+ * etapy będą przeprowadzane po wykryciu zmian (\c watch) na obserwowanym
+ * deskryptorze (\c fd) i wywołaniu funkcji \c gg_http_watch_fd().
+ *
+ * Po zakończeniu, należy zwolnić strukturę za pomocą funkcji
+ * \c gg_http_free(). Połączenie asynchroniczne można zatrzymać w każdej
+ * chwili za pomocą \c gg_http_stop().
+ *
+ * \param hostname Adres serwera
+ * \param port Port serwera
+ * \param async Flaga asynchronicznego połączenia
+ * \param method Metoda HTTP
+ * \param path Ścieżka do zasobu (musi być poprzedzona znakiem '/')
+ * \param header Nagłówek zapytania plus ewentualne dane dla POST
+ *
+ * \return Zaalokowana struktura \c gg_http lub NULL, jeśli wystąpił błąd.
+ *
+ * \ingroup http
+ */
+struct gg_http *gg_http_connect(const char *hostname, int port, int async, const char *method, const char *path, const char *header)
+{
+ struct gg_http *h;
+
+ if (!hostname || !port || !method || !path || !header) {
+ gg_debug(GG_DEBUG_MISC, "// gg_http_connect() invalid arguments\n");
+ errno = EFAULT;
+ return NULL;
+ }
+
+ if (!(h = malloc(sizeof(*h))))
+ return NULL;
+ memset(h, 0, sizeof(*h));
+
+ h->async = async;
+ h->port = port;
+ h->fd = -1;
+ h->type = GG_SESSION_HTTP;
+
+ gg_http_set_resolver(h, GG_RESOLVER_DEFAULT);
+
+ if (gg_proxy_enabled) {
+ char *auth = gg_proxy_auth();
+
+ h->query = gg_saprintf("%s http://%s:%d%s HTTP/1.0\r\n%s%s",
+ method, hostname, port, path, (auth) ? auth :
+ "", header);
+ hostname = gg_proxy_host;
+ h->port = port = gg_proxy_port;
+ free(auth);
+
+ } else {
+ h->query = gg_saprintf("%s %s HTTP/1.0\r\n%s",
+ method, path, header);
+ }
+
+ if (!h->query) {
+ gg_debug(GG_DEBUG_MISC, "// gg_http_connect() not enough memory for query\n");
+ free(h);
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-QUERY-----\n%s\n=> -----END-HTTP-QUERY-----\n", h->query);
+
+ if (async) {
+ if (h->resolver_start(&h->fd, &h->resolver, hostname) == -1) {
+ gg_debug(GG_DEBUG_MISC, "// gg_http_connect() resolver failed\n");
+ gg_http_free(h);
+ errno = ENOENT;
+ return NULL;
+ }
+
+ gg_debug(GG_DEBUG_MISC, "// gg_http_connect() resolver = %p\n", h->resolver);
+
+ h->state = GG_STATE_RESOLVING;
+ h->check = GG_CHECK_READ;
+ h->timeout = GG_DEFAULT_TIMEOUT;
+ } else {
+ struct in_addr addr;
+
+ if (gg_gethostbyname_real(hostname, &addr, 0) == -1) {
+ gg_debug(GG_DEBUG_MISC, "// gg_http_connect() host not found\n");
+ gg_http_free(h);
+ errno = ENOENT;
+ return NULL;
+ }
+
+ if ((h->fd = gg_connect(&addr, port, 0)) == -1) {
+ gg_debug(GG_DEBUG_MISC, "// gg_http_connect() connection failed (errno=%d, %s)\n", errno, strerror(errno));
+ gg_http_free(h);
+ return NULL;
+ }
+
+ h->state = GG_STATE_CONNECTING;
+
+ while (h->state != GG_STATE_ERROR && h->state != GG_STATE_PARSING) {
+ if (gg_http_watch_fd(h) == -1)
+ break;
+ }
+
+ if (h->state != GG_STATE_PARSING) {
+ gg_debug(GG_DEBUG_MISC, "// gg_http_connect() some strange error\n");
+ gg_http_free(h);
+ return NULL;
+ }
+ }
+
+ h->callback = gg_http_watch_fd;
+ h->destroy = gg_http_free;
+
+ return h;
+}
+
+#ifndef DOXYGEN
+
+#define gg_http_error(x) \
+ gg_sock_close(h->fd); \
+ h->fd = -1; \
+ h->state = GG_STATE_ERROR; \
+ h->error = x; \
+ return 0;
+
+#endif /* DOXYGEN */
+
+/**
+ * Funkcja wywoływana po zaobserwowaniu zmian na deskryptorze połączenia.
+ *
+ * Operacja będzie zakończona, gdy pole \c state będzie równe
+ * \c GG_STATE_PARSING. W tym miejscu działanie przejmuje zwykle funkcja
+ * korzystająca z \c gg_http_watch_fd(). W przypadku błędu połączenia,
+ * pole \c state będzie równe \c GG_STATE_ERROR, a kod błędu znajdzie się
+ * w polu \c error.
+ *
+ * \param h Struktura połączenia
+ *
+ * \return \return 0 jeśli się powiodło, -1 w przypadku błędu
+ *
+ * \ingroup http
+ */
+int gg_http_watch_fd(struct gg_http *h)
+{
+ gg_debug(GG_DEBUG_FUNCTION, "** gg_http_watch_fd(%p);\n", h);
+
+ if (!h) {
+ gg_debug(GG_DEBUG_MISC, "// gg_http_watch_fd() invalid arguments\n");
+ errno = EFAULT;
+ return -1;
+ }
+
+ if (h->state == GG_STATE_RESOLVING) {
+ struct in_addr a;
+
+ gg_debug(GG_DEBUG_MISC, "=> http, resolving done\n");
+
+ if (gg_sock_read(h->fd, &a, sizeof(a)) < (signed)sizeof(a) || a.s_addr == INADDR_NONE) {
+ gg_debug(GG_DEBUG_MISC, "=> http, resolver thread failed\n");
+ gg_http_error(GG_ERROR_RESOLVING);
+ }
+
+ gg_sock_close(h->fd);
+ h->fd = -1;
+
+ h->resolver_cleanup(&h->resolver, 0);
+
+ gg_debug(GG_DEBUG_MISC, "=> http, connecting to %s:%d\n", inet_ntoa(a), h->port);
+
+ if ((h->fd = gg_connect(&a, h->port, h->async)) == -1) {
+ gg_debug(GG_DEBUG_MISC, "=> http, connection failed (errno=%d, %s)\n", errno, strerror(errno));
+ gg_http_error(GG_ERROR_CONNECTING);
+ }
+
+ h->state = GG_STATE_CONNECTING;
+ h->check = GG_CHECK_WRITE;
+ h->timeout = GG_DEFAULT_TIMEOUT;
+
+ return 0;
+ }
+
+ if (h->state == GG_STATE_CONNECTING) {
+ int res = 0;
+ unsigned int res_size = sizeof(res);
+
+ if (h->async && (gg_getsockopt(h->fd, SOL_SOCKET, SO_ERROR, &res, &res_size) || res)) {
+ gg_debug(GG_DEBUG_MISC, "=> http, async connection failed (errno=%d, %s)\n", (res) ? res : errno , strerror((res) ? res : errno));
+ gg_sock_close(h->fd);
+ h->fd = -1;
+ h->state = GG_STATE_ERROR;
+ h->error = GG_ERROR_CONNECTING;
+ if (res)
+ errno = res;
+ return 0;
+ }
+
+ gg_debug(GG_DEBUG_MISC, "=> http, connected, sending request\n");
+
+ h->state = GG_STATE_SENDING_QUERY;
+ }
+
+ if (h->state == GG_STATE_SENDING_QUERY) {
+ int res;
+
+ if ((res = gg_sock_write(h->fd, h->query, (int)strlen(h->query))) < 1) {
+ gg_debug(GG_DEBUG_MISC, "=> http, write() failed (len=%d, res=%d, errno=%d)\n", strlen(h->query), res, errno);
+ gg_http_error(GG_ERROR_WRITING);
+ }
+
+ if (res < (int)strlen(h->query)) {
+ gg_debug(GG_DEBUG_MISC, "=> http, partial header sent (led=%d, sent=%d)\n", strlen(h->query), res);
+
+ memmove(h->query, h->query + res, strlen(h->query) - res + 1);
+ h->state = GG_STATE_SENDING_QUERY;
+ h->check = GG_CHECK_WRITE;
+ h->timeout = GG_DEFAULT_TIMEOUT;
+ } else {
+ gg_debug(GG_DEBUG_MISC, "=> http, request sent (len=%d)\n", strlen(h->query));
+ free(h->query);
+ h->query = NULL;
+
+ h->state = GG_STATE_READING_HEADER;
+ h->check = GG_CHECK_READ;
+ h->timeout = GG_DEFAULT_TIMEOUT;
+ }
+
+ return 0;
+ }
+
+ if (h->state == GG_STATE_READING_HEADER) {
+ char buf[1024], *tmp;
+ int res;
+
+ if ((res = gg_sock_read(h->fd, buf, sizeof(buf))) == -1) {
+ gg_debug(GG_DEBUG_MISC, "=> http, reading header failed (errno=%d)\n", errno);
+ if (h->header) {
+ free(h->header);
+ h->header = NULL;
+ }
+ gg_http_error(GG_ERROR_READING);
+ }
+
+ if (!res) {
+ gg_debug(GG_DEBUG_MISC, "=> http, connection reset by peer\n");
+ if (h->header) {
+ free(h->header);
+ h->header = NULL;
+ }
+ gg_http_error(GG_ERROR_READING);
+ }
+
+ gg_debug(GG_DEBUG_MISC, "=> http, read %d bytes of header\n", res);
+
+ if (!(tmp = realloc(h->header, h->header_size + res + 1))) {
+ gg_debug(GG_DEBUG_MISC, "=> http, not enough memory for header\n");
+ free(h->header);
+ h->header = NULL;
+ gg_http_error(GG_ERROR_READING);
+ }
+
+ h->header = tmp;
+
+ memcpy(h->header + h->header_size, buf, res);
+ h->header_size += res;
+
+ gg_debug(GG_DEBUG_MISC, "=> http, header_buf=%p, header_size=%d\n", h->header, h->header_size);
+
+ h->header[h->header_size] = 0;
+
+ if ((tmp = strstr(h->header, "\r\n\r\n")) || (tmp = strstr(h->header, "\n\n"))) {
+ int sep_len = (*tmp == '\r') ? 4 : 2;
+ unsigned int left;
+ char *line;
+
+ left = h->header_size - ((long)(tmp) - (long)(h->header) + sep_len);
+
+ gg_debug(GG_DEBUG_MISC, "=> http, got all header (%d bytes, %d left)\n", h->header_size - left, left);
+
+ /* HTTP/1.1 200 OK */
+ if (strlen(h->header) < 16 || strncmp(h->header + 9, "200", 3)) {
+ gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-HEADER-----\n%s\n=> -----END-HTTP-HEADER-----\n", h->header);
+
+ gg_debug(GG_DEBUG_MISC, "=> http, didn't get 200 OK -- no results\n");
+ free(h->header);
+ h->header = NULL;
+ gg_http_error(GG_ERROR_CONNECTING);
+ }
+
+ h->body_size = 0;
+ line = h->header;
+ *tmp = 0;
+
+ gg_debug(GG_DEBUG_MISC, "=> -----BEGIN-HTTP-HEADER-----\n%s\n=> -----END-HTTP-HEADER-----\n", h->header);
+
+ while (line) {
+ if (!strncasecmp(line, "Content-length: ", 16)) {
+ h->body_size = atoi(line + 16);
+ }
+ line = strchr(line, '\n');
+ if (line)
+ line++;
+ }
+
+ if (h->body_size <= 0) {
+ gg_debug(GG_DEBUG_MISC, "=> http, content-length not found\n");
+ h->body_size = left;
+ }
+
+ if (left > h->body_size) {
+ gg_debug(GG_DEBUG_MISC, "=> http, oversized reply (%d bytes needed, %d bytes left)\n", h->body_size, left);
+ h->body_size = left;
+ }
+
+ gg_debug(GG_DEBUG_MISC, "=> http, body_size=%d\n", h->body_size);
+
+ if (!(h->body = malloc(h->body_size + 1))) {
+ gg_debug(GG_DEBUG_MISC, "=> http, not enough memory (%d bytes for body_buf)\n", h->body_size + 1);
+ free(h->header);
+ h->header = NULL;
+ gg_http_error(GG_ERROR_READING);
+ }
+
+ if (left) {
+ memcpy(h->body, tmp + sep_len, left);
+ h->body_done = left;
+ }
+
+ h->body[left] = 0;
+
+ h->state = GG_STATE_READING_DATA;
+ h->check = GG_CHECK_READ;
+ h->timeout = GG_DEFAULT_TIMEOUT;
+ }
+
+ return 0;
+ }
+
+ if (h->state == GG_STATE_READING_DATA) {
+ char buf[1024];
+ int res;
+
+ if ((res = gg_sock_read(h->fd, buf, sizeof(buf))) == -1) {
+ gg_debug(GG_DEBUG_MISC, "=> http, reading body failed (errno=%d)\n", errno);
+ if (h->body) {
+ free(h->body);
+ h->body = NULL;
+ }
+ gg_http_error(GG_ERROR_READING);
+ }
+
+ if (!res) {
+ if (h->body_done >= h->body_size) {
+ gg_debug(GG_DEBUG_MISC, "=> http, we're done, closing socket\n");
+ h->state = GG_STATE_PARSING;
+ gg_sock_close(h->fd);
+ h->fd = -1;
+ } else {
+ gg_debug(GG_DEBUG_MISC, "=> http, connection closed while reading (have %d, need %d)\n", h->body_done, h->body_size);
+ if (h->body) {
+ free(h->body);
+ h->body = NULL;
+ }
+ gg_http_error(GG_ERROR_READING);
+ }
+
+ return 0;
+ }
+
+ gg_debug(GG_DEBUG_MISC, "=> http, read %d bytes of body\n", res);
+
+ if (h->body_done + res > h->body_size) {
+ char *tmp;
+
+ gg_debug(GG_DEBUG_MISC, "=> http, too much data (%d bytes, %d needed), enlarging buffer\n", h->body_done + res, h->body_size);
+
+ if (!(tmp = realloc(h->body, h->body_done + res + 1))) {
+ gg_debug(GG_DEBUG_MISC, "=> http, not enough memory for data (%d needed)\n", h->body_done + res + 1);
+ free(h->body);
+ h->body = NULL;
+ gg_http_error(GG_ERROR_READING);
+ }
+
+ h->body = tmp;
+ h->body_size = h->body_done + res;
+ }
+
+ h->body[h->body_done + res] = 0;
+ memcpy(h->body + h->body_done, buf, res);
+ h->body_done += res;
+
+ gg_debug(GG_DEBUG_MISC, "=> body_done=%d, body_size=%d\n", h->body_done, h->body_size);
+
+ return 0;
+ }
+
+ if (h->fd != -1)
+ gg_sock_close(h->fd);
+
+ h->fd = -1;
+ h->state = GG_STATE_ERROR;
+ h->error = 0;
+
+ return -1;
+}
+
+/**
+ * Kończy asynchroniczne połączenie HTTP.
+ *
+ * Po zatrzymaniu należy zwolnić zasoby funkcją \c gg_http_free().
+ *
+ * \param h Struktura połączenia
+ *
+ * \ingroup http
+ */
+void gg_http_stop(struct gg_http *h)
+{
+ if (!h)
+ return;
+
+ if (h->state == GG_STATE_ERROR || h->state == GG_STATE_DONE)
+ return;
+
+ if (h->fd != -1) {
+ gg_sock_close(h->fd);
+ h->fd = -1;
+ }
+
+ h->resolver_cleanup(&h->resolver, 1);
+}
+
+/**
+ * \internal Zwalnia pola struktury \c gg_http.
+ *
+ * Funkcja zwalnia same pola, nie zwalnia struktury.
+ *
+ * \param h Struktura połączenia
+ */
+void gg_http_free_fields(struct gg_http *h)
+{
+ if (!h)
+ return;
+
+ if (h->body) {
+ free(h->body);
+ h->body = NULL;
+ }
+
+ if (h->query) {
+ free(h->query);
+ h->query = NULL;
+ }
+
+ if (h->header) {
+ free(h->header);
+ h->header = NULL;
+ }
+}
+
+/**
+ * Zwalnia zasoby po połączeniu HTTP.
+ *
+ * Jeśli połączenie nie zostało jeszcze zakończone, jest przerywane.
+ *
+ * \param h Struktura połączenia
+ *
+ * \ingroup http
+ */
+void gg_http_free(struct gg_http *h)
+{
+ if (!h)
+ return;
+
+ gg_http_stop(h);
+ gg_http_free_fields(h);
+ free(h);
+}
+
+/*
+ * Local variables:
+ * c-indentation-style: k&r
+ * c-basic-offset: 8
+ * indent-tabs-mode: notnil
+ * End:
+ *
+ * vim: shiftwidth=8:
+ */
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