/**
* 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(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;
}
/*
* gg_http_connect() // funkcja pomocnicza
*
* rozpoczyna po³±czenie po http.
*
* - hostname - adres serwera
* - port - port serwera
* - async - asynchroniczne po³±czenie
* - method - metoda http (GET, POST, cokolwiek)
* - path - ¶cie¿ka do zasobu (musi byæ poprzedzona ,,/'')
* - header - nag³ówek zapytania plus ewentualne dane dla POST
*
* zaalokowana struct gg_http, któr± po¼niej nale¿y
* zwolniæ funkcj± gg_http_free(), albo NULL je¶li wyst±pi³ b³±d.
*/
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;
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;
if (auth)
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) {
#ifndef __GG_LIBGADU_HAVE_PTHREAD
if (gg_resolve(&h->fd, &h->pid, hostname)) {
#else
if (gg_resolve_pthread(&h->fd, &h->resolver, hostname)) {
#endif
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 *hn, a;
if (!(hn = gg_gethostbyname(hostname))) {
gg_debug(GG_DEBUG_MISC, "// gg_http_connect() host not found\n");
gg_http_free(h);
errno = ENOENT;
return NULL;
} else {
a.s_addr = hn->s_addr;
free(hn);
}
if (!(h->fd = gg_connect(&a, 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;
}
#define gg_http_error(x) \
close(h->fd); \
h->fd = -1; \
h->state = GG_STATE_ERROR; \
h->error = x; \
return 0;
/*
* gg_http_watch_fd()
*
* przy asynchronicznej obs³udze HTTP funkcjê t± nale¿y wywo³aæ, je¶li
* zmieni³o siê co¶ na obserwowanym deskryptorze.
*
* - h - struktura opisuj±ca po³±czenie
*
* je¶li wszystko posz³o dobrze to 0, inaczej -1. po³±czenie bêdzie
* zakoñczone, je¶li h->state == GG_STATE_PARSING. je¶li wyst±pi jaki¶
* b³±d, to bêdzie tam GG_STATE_ERROR i odpowiedni kod b³êdu w h->error.
*/
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 (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);
}
close(h->fd);
h->fd = -1;
#ifndef __GG_LIBGADU_HAVE_PTHREAD
waitpid(h->pid, NULL, 0);
#else
if (h->resolver) {
gg_resolve_pthread_cleanup(h->resolver, 0);
h->resolver = NULL;
}
#endif
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 && (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));
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 = write(h->fd, h->query, 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 < 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 = 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 = 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;
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)
close(h->fd);
h->fd = -1;
h->state = GG_STATE_ERROR;
h->error = 0;
return -1;
}
