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pn_http_server.c
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pn_http_server.c
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/*
* Copyright (C) 2008-2009 Felipe Contreras.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/*
* Each command connection (NS,SB) can use the auxiliar HTTP connection method.
* So commands are sent through a single HTTP gateway (ideally).
*
* The current implementation uses one HTTP connection per command connection.
* For the NS the default gateway is used, but for SB's the SB IP is used.
* That seems to work.
*/
#include "pn_http_server.h"
#include "pn_node_private.h"
#include "pn_stream.h"
#include "pn_timer.h"
#include "pn_log.h"
#include "pn_global.h"
#include <glib.h>
#include <string.h>
#include <stdlib.h> /* for atoi */
#include "pn_util.h"
#include "session.h"
#ifdef HAVE_LIBPURPLE
#include <proxy.h> /* for purple_proxy_info_get_* */
#endif /* HAVE_LIBPURPLE */
struct PnHttpServer
{
PnNode parent;
guint parser_state;
gboolean waiting_response;
GQueue *write_queue;
guint content_length;
struct pn_timer *timer;
gchar *last_session_id;
gchar *session;
gchar *gateway;
GHashTable *childs;
PnNode *cur;
gchar *old_buffer;
guint write_watch;
GIOStatus last_flush;
};
struct PnHttpServerClass
{
PnNodeClass parent_class;
};
static PnNodeClass *parent_class;
typedef struct
{
PnNode *conn;
gchar *body;
gsize body_len;
} HttpQueueData;
static GIOStatus
foo_write (PnNode *conn,
PnNode *prev,
const gchar *buf,
gsize count,
gsize *ret_bytes_written,
GError **error);
static void
process_queue (PnHttpServer *http_conn,
GError **error)
{
HttpQueueData *queue_data;
queue_data = g_queue_pop_head (http_conn->write_queue);
if (queue_data)
{
foo_write (PN_NODE (http_conn),
queue_data->conn,
queue_data->body,
queue_data->body_len,
NULL,
error);
g_object_unref (queue_data->conn);
g_free (queue_data->body);
g_free (queue_data);
}
}
static gboolean
read_cb (GIOChannel *source,
GIOCondition condition,
gpointer data)
{
PnNode *conn;
gchar buf[PN_BUF_LEN + 1];
gsize bytes_read;
pn_log ("begin");
conn = PN_NODE (data);
pn_debug ("conn=%p,source=%p", conn, source);
g_object_ref (conn);
{
GIOStatus status = G_IO_STATUS_NORMAL;
status = pn_node_read (conn, buf, PN_BUF_LEN, &bytes_read, &conn->error);
if (status == G_IO_STATUS_AGAIN)
{
g_object_unref (conn);
return TRUE;
}
if (conn->error)
{
pn_node_error (conn);
g_object_unref (conn);
return FALSE;
}
if (status != G_IO_STATUS_NORMAL)
{
pn_warning ("not normal, status=%d", status);
g_object_unref (conn);
return TRUE;
}
}
if (!conn->error)
{
PnHttpServer *http_conn;
http_conn = PN_HTTP_SERVER (conn);
if (http_conn->cur)
{
/* make sure the server is not sending the same buffer again */
/** @todo find out why this happens */
if (!(http_conn->old_buffer &&
strncmp (buf, http_conn->old_buffer, bytes_read) == 0))
{
pn_node_parse (http_conn->cur, buf, bytes_read);
g_free (http_conn->old_buffer);
http_conn->old_buffer = g_strndup (buf, bytes_read);
}
}
if (conn->error)
{
pn_node_error (conn);
g_object_unref (conn);
return FALSE;
}
}
g_object_unref (conn);
pn_log ("end");
return TRUE;
}
PnHttpServer *
pn_http_server_new (const gchar *name)
{
PnHttpServer *http_conn;
pn_log ("begin");
http_conn = PN_HTTP_SERVER (g_type_create_instance (PN_HTTP_SERVER_TYPE));
{
PnNode *tmp = PN_NODE (http_conn);
tmp->name = g_strdup (name);
tmp->type = PN_NODE_HTTP;
}
pn_log ("end");
return http_conn;
}
void
pn_http_server_free (PnHttpServer *http_conn)
{
pn_log ("begin");
g_object_unref (http_conn);
pn_log ("end");
}
#ifdef HAVE_LIBPURPLE
/* get proxy auth info and set up proxy auth header */
/* TODO find a way to do this without libpurple */
static inline char *
get_auth(PnNode *conn)
{
const char *username, *password;
PurpleProxyInfo *gpi;
char *tmp, *auth;
gpi = purple_proxy_get_setup(msn_session_get_user_data(conn->session));
if (!gpi)
return NULL;
if (purple_proxy_info_get_type(gpi) != PURPLE_PROXY_HTTP &&
purple_proxy_info_get_type(gpi) != PURPLE_PROXY_USE_ENVVAR)
return NULL;
username = purple_proxy_info_get_username(gpi);
password = purple_proxy_info_get_password(gpi);
if (!username && !password)
return NULL;
auth = g_strdup_printf("%s:%s", username ? username : "", password ? password : "");
tmp = purple_base64_encode((const guchar *) auth, strlen(auth));
g_free(auth);
auth = g_strdup_printf("Proxy-Authorization: Basic %s\r\n", tmp);
g_free(tmp);
return auth;
}
#endif /* HAVE_LIBPURPLE */
static gboolean
write_cb (GIOChannel *source,
GIOCondition condition,
gpointer data)
{
PnHttpServer *http_conn = data;
if (http_conn->last_flush == G_IO_STATUS_AGAIN) {
http_conn->last_flush = pn_stream_flush(PN_NODE(http_conn)->stream, NULL);
if (http_conn->last_flush == G_IO_STATUS_AGAIN)
return TRUE;
}
http_conn->write_watch = 0;
return FALSE;
}
static gboolean
http_poll (gpointer data)
{
PnNode *conn;
PnHttpServer *http_conn;
GIOStatus status = G_IO_STATUS_NORMAL;
GError *tmp_error = NULL;
gsize bytes_written = 0;
static guint count = 0;
gchar *header;
gchar *params;
gchar *auth = NULL;
g_return_val_if_fail (data != NULL, FALSE);
conn = PN_NODE (data);
http_conn = PN_HTTP_SERVER (data);
pn_debug ("stream=%p", conn->stream);
if (!http_conn->cur)
return TRUE;
g_return_val_if_fail (http_conn->cur, FALSE);
count++;
/* Don't poll if we already sent something, unless we have been waiting for
* too long; a disconnection might have happened. */
if (http_conn->waiting_response && count < 10)
{
/* There's no need to poll if we're already waiting for a response */
pn_debug ("waiting for response");
return TRUE;
}
#ifdef HAVE_LIBPURPLE
auth = get_auth(conn);
#endif /* HAVE_LIBPURPLE */
params = g_strdup_printf ("Action=poll&SessionID=%s",
(gchar *) http_conn->cur->foo_data);
header = g_strdup_printf ("POST http://%s/gateway/gateway.dll?%s HTTP/1.1\r\n"
"Accept: */*\r\n"
"User-Agent: MSMSGS\r\n"
"Host: %s\r\n"
"%s" /* Proxy auth */
"Proxy-Connection: Keep-Alive\r\n"
"Connection: Keep-Alive\r\n"
"Pragma: no-cache\r\n"
"Cache-Control: no-cache\r\n"
"Content-Type: application/x-msn-messenger\r\n"
"Content-Length: 0\r\n\r\n",
http_conn->gateway,
params,
http_conn->gateway,
auth ? auth : "");
#ifdef PECAN_DEBUG_HTTP
pn_debug ("header=[%s]", header);
#endif
g_free (params);
status = pn_stream_write_full (conn->stream, header, strlen (header), &bytes_written, &tmp_error);
g_free (header);
http_conn->waiting_response = TRUE;
pn_timer_stop (http_conn->timer);
if (status == G_IO_STATUS_NORMAL)
{
status = pn_stream_flush (conn->stream, &tmp_error);
if (status == G_IO_STATUS_AGAIN) {
http_conn->last_flush = status;
http_conn->write_watch = g_io_add_watch(conn->stream->channel,
G_IO_OUT, write_cb, http_conn);
/* fake status */
status = G_IO_STATUS_NORMAL;
}
if (status == G_IO_STATUS_NORMAL)
pn_log ("bytes_written=%zu", bytes_written);
}
if (status != G_IO_STATUS_NORMAL)
{
PnNodeClass *class;
pn_error ("not normal: status=%d", status);
class = g_type_class_peek (PN_NODE_TYPE);
g_signal_emit (G_OBJECT (conn), class->error_sig, 0, conn);
return FALSE;
}
return TRUE;
}
#if defined(USE_GIO)
static void
connect_cb(GObject *source,
GAsyncResult *res,
gpointer user_data)
{
GSocketConnection *socket_conn;
PnNode *conn;
PnHttpServer *http_conn;
conn = PN_NODE(user_data);
http_conn = PN_HTTP_SERVER(user_data);
socket_conn = g_socket_client_connect_to_host_finish(G_SOCKET_CLIENT(source), res, NULL);
g_object_unref(source);
g_object_ref(conn);
if (socket_conn) {
GIOChannel *channel;
GSocket *socket;
conn->socket_conn = socket_conn;
socket = g_socket_connection_get_socket(socket_conn);
conn->stream = pn_stream_new(g_socket_get_fd(socket));
channel = conn->stream->channel;
g_io_channel_set_encoding (channel, NULL, NULL);
g_io_channel_set_line_term (channel, "\r\n", 2);
conn->status = PN_NODE_STATUS_OPEN;
http_conn->timer = pn_timer_new (http_poll, http_conn);
pn_timer_start (http_conn->timer, 2);
conn->read_watch = g_io_add_watch (channel, G_IO_IN, read_cb, conn);
{
PnNodeClass *class;
class = g_type_class_peek (PN_NODE_TYPE);
g_signal_emit (G_OBJECT (conn), class->open_sig, 0, conn);
}
}
else {
PnNodeClass *class;
class = g_type_class_peek (PN_NODE_TYPE);
conn->error = g_error_new_literal (PN_NODE_ERROR, PN_NODE_ERROR_OPEN,
"Unable to connect");
g_signal_emit (G_OBJECT (conn), class->error_sig, 0, conn);
}
g_object_unref(conn);
}
#elif defined(HAVE_LIBPURPLE)
static void
connect_cb (gpointer data,
gint source,
const gchar *error_message)
{
PnNode *conn;
PnHttpServer *http_conn;
pn_log ("begin");
conn = PN_NODE (data);
http_conn = PN_HTTP_SERVER (data);
conn->connect_data = NULL;
if (source >= 0)
{
GIOChannel *channel;
pn_stream_free (conn->stream);
conn->stream = pn_stream_new (source);
channel = conn->stream->channel;
g_io_channel_set_encoding (channel, NULL, NULL);
g_io_channel_set_line_term (channel, "\r\n", 2);
conn->status = PN_NODE_STATUS_OPEN;
http_conn->timer = pn_timer_new (http_poll, http_conn);
pn_timer_start (http_conn->timer, 2);
conn->read_watch = g_io_add_watch (channel, G_IO_IN, read_cb, conn);
{
PnNodeClass *class;
class = g_type_class_peek (PN_NODE_TYPE);
g_signal_emit (G_OBJECT (conn), class->open_sig, 0, conn);
}
}
else
{
PnNodeClass *class;
class = g_type_class_peek (PN_NODE_TYPE);
conn->error = g_error_new_literal (PN_NODE_ERROR, PN_NODE_ERROR_OPEN,
error_message ? error_message : "Unable to connect");
g_signal_emit (G_OBJECT (conn), class->error_sig, 0, conn);
}
pn_log ("end");
}
#endif
static void
connect_impl (PnNode *conn,
const gchar *hostname,
gint port)
{
PnHttpServer *http_conn;
http_conn = PN_HTTP_SERVER (conn);
conn->status = PN_NODE_STATUS_CONNECTING;
if (!conn->stream)
{
port = 80;
pn_debug ("conn=%p,hostname=%s,port=%d", conn, hostname, port);
if (conn->prev->type == PN_NODE_NS)
hostname = http_conn->gateway;
#if defined(USE_GIO)
GSocketClient *client;
client = g_socket_client_new();
g_socket_client_connect_to_host_async(client, hostname, port,
NULL, connect_cb, conn);
#elif defined(HAVE_LIBPURPLE)
/* close a pending connection */
/* this can happen when reconecting before receiving the connection
* callback. */
if (conn->connect_data)
purple_proxy_connect_cancel (conn->connect_data);
conn->connect_data = purple_proxy_connect (NULL, msn_session_get_user_data (conn->session),
hostname, port, connect_cb, conn);
#endif
}
else
{
if (conn->prev)
{
/* fake open */
PnNodeClass *class;
class = g_type_class_peek (PN_NODE_TYPE);
g_signal_emit (G_OBJECT (conn->prev), class->open_sig, 0, conn->prev);
}
}
}
static void
close_impl (PnNode *conn)
{
PnHttpServer *http_conn;
if (conn->status == PN_NODE_STATUS_CLOSED) {
pn_log ("already closed: %p", conn);
return;
}
pn_log ("begin");
http_conn = PN_HTTP_SERVER (conn);
pn_timer_free(http_conn->timer);
http_conn->timer = NULL;
if (http_conn->write_watch) {
g_source_remove (http_conn->write_watch);
http_conn->write_watch = 0;
}
g_free (http_conn->last_session_id);
http_conn->last_session_id = NULL;
g_free (http_conn->session);
http_conn->session = NULL;
http_conn->parser_state = 0;
http_conn->waiting_response = FALSE;
{
HttpQueueData *queue_data;
while ((queue_data = g_queue_pop_head (http_conn->write_queue)))
{
g_object_unref (queue_data->conn);
g_free (queue_data->body);
g_free (queue_data);
}
}
#if 0
/** @todo check that there aren't recursive frees. */
g_hash_table_remove_all (http_conn->childs);
#endif
parent_class->close (conn);
pn_log ("end");
}
static GIOStatus
read_impl (PnNode *conn,
gchar *buf,
gsize count,
gsize *ret_bytes_read,
GError **error)
{
PnHttpServer *http_conn;
GIOStatus status = G_IO_STATUS_NORMAL;
GError *tmp_error = NULL;
gsize bytes_read = 0;
pn_log ("begin");
http_conn = PN_HTTP_SERVER (conn);
pn_debug ("stream=%p", conn->stream);
{
gchar *str = NULL;
gchar **tokens = NULL;
if (http_conn->parser_state == 0)
{
gint code;
{
gsize terminator_pos;
status = pn_stream_read_line (conn->stream,
&str, NULL, &terminator_pos, &tmp_error);
if (str)
str[terminator_pos] = '\0';
}
if (tmp_error)
{
pn_debug ("error reading: %s", tmp_error->message);
goto leave;
}
if (status == G_IO_STATUS_AGAIN)
return status;
if (status != G_IO_STATUS_NORMAL) {
tmp_error = g_error_new_literal (PN_NODE_ERROR, PN_NODE_ERROR_READ,
"Read error");
goto leave;
}
#ifdef PECAN_DEBUG_HTTP
pn_debug ("str=[%s]", str);
#endif
if (!str)
return G_IO_STATUS_AGAIN;
tokens = g_strsplit (str, " ", 3);
if (!(tokens && tokens[0] &&
((strcmp (tokens[0], "HTTP/1.1") == 0) ||
(strcmp (tokens[0], "HTTP/1.0") == 0))))
{
pn_debug ("error reading: parse error");
tmp_error = g_error_new_literal (PN_NODE_ERROR, PN_NODE_ERROR_READ,
"Parse error");
goto leave;
}
if (!(tokens[1]))
{
pn_debug ("error reading: parse error");
tmp_error = g_error_new_literal (PN_NODE_ERROR, PN_NODE_ERROR_READ,
"Parse error");
goto leave;
}
code = atoi (tokens[1]);
if (code != 200 && code != 100)
{
pn_debug ("error reading: %d %s", code, tokens[2]);
tmp_error = g_error_new (PN_NODE_ERROR, PN_NODE_ERROR_READ,
"%s", tokens[2]);
goto leave;
}
g_strfreev (tokens);
tokens = NULL;
g_free (str);
str = NULL;
http_conn->parser_state++;
}
if (http_conn->parser_state == 1)
{
while (TRUE)
{
{
gsize terminator_pos;
status = pn_stream_read_line (conn->stream,
&str, NULL, &terminator_pos, &tmp_error);
if (str)
str[terminator_pos] = '\0';
}
if (tmp_error)
{
pn_debug ("error reading: %s", tmp_error->message);
goto leave;
}
if (status == G_IO_STATUS_AGAIN)
return status;
if (!str || str[0] == '\0')
break;
#ifdef PECAN_DEBUG_HTTP
pn_debug ("str=[%s]", str);
#endif
tokens = g_strsplit (str, ": ", 2);
if (!(tokens[0] && tokens[1]))
{
pn_debug ("error reading: parse error");
tmp_error = g_error_new_literal (PN_NODE_ERROR, PN_NODE_ERROR_READ,
"Parse error");
goto leave;
}
if (strcmp (tokens[0], "Content-Length") == 0)
{
http_conn->content_length = atoi (tokens[1]);
}
else if (strcmp (tokens[0], "X-MSN-Messenger") == 0)
{
gchar **tokens_b;
gint i;
tokens_b = g_strsplit (tokens[1], ";", -1);
for (i = 0; tokens_b[i]; i++)
{
gchar **tokens_c;
gchar *token;
tokens_c = g_strsplit (tokens_b[i], "=", 2);
token = tokens_c[0];
if (*token == ' ')
token++;
#ifdef PECAN_DEBUG_HTTP
pn_debug ("token=[%s]", token);
#endif
if (strcmp (token, "SessionID") == 0)
{
g_free (http_conn->last_session_id);
http_conn->last_session_id = g_strdup (tokens_c[1]);
}
else if (strcmp (token, "GW-IP") == 0)
{
g_free (http_conn->gateway);
http_conn->gateway = g_strdup (tokens_c[1]);
}
else if (strcmp (token, "Session") == 0)
{
g_free (http_conn->session);
http_conn->session = g_strdup (tokens_c[1]);
}
g_strfreev (tokens_c);
}
g_strfreev (tokens_b);
}
g_strfreev (tokens);
tokens = NULL;
g_free (str);
str = NULL;
}
http_conn->parser_state++;
}
if (http_conn->parser_state == 2)
{
{
PnNode *child;
gchar *session_id;
gchar *t;
t = strchr (http_conn->last_session_id, '.');
session_id = g_strndup (http_conn->last_session_id, t - http_conn->last_session_id);
child = g_hash_table_lookup (http_conn->childs, session_id);
pn_log ("child=%p", child);
pn_log ("sesison_id=[%s]", session_id);
if (http_conn->session && (strcmp (http_conn->session, "close") == 0))
{
if (child)
{
PnNode *foo;
pn_info ("removing child");
pn_node_close (child);
g_hash_table_remove (http_conn->childs, session_id);
g_object_unref (http_conn->cur);
g_free (http_conn->gateway);
g_free (http_conn->last_session_id);
if ((foo = PN_NODE (g_hash_table_peek_first (http_conn->childs))))
{
http_conn->cur = foo;
http_conn->gateway = g_strdup (foo->hostname);
http_conn->last_session_id = g_strdup (foo->foo_data);
}
else
{
pn_info ("no more childs");
http_conn->cur = NULL;
http_conn->gateway = NULL;
http_conn->last_session_id = NULL;
pn_node_close (conn);
}
}
}
else
{
if (!child)
{
child = http_conn->cur;
pn_info ("adding child: %p", child);
g_hash_table_insert (http_conn->childs, g_strdup (session_id), g_object_ref (child));
}
if (child)
{
g_free (child->foo_data);
child->foo_data = g_strdup (http_conn->last_session_id);
}
pn_debug ("session=%s", http_conn->session);
}
g_free (session_id);
}
status = pn_stream_read (conn->stream, buf, MIN (http_conn->content_length, count), &bytes_read, &tmp_error);
if (status == G_IO_STATUS_AGAIN)
return status;
pn_log ("status=%d", status);
pn_log ("bytes_read=%zu", bytes_read);
if (ret_bytes_read)
*ret_bytes_read = bytes_read;
http_conn->content_length -= bytes_read;
pn_log ("con_len=%d,read=%zu", http_conn->content_length, bytes_read);
if (conn->status == PN_NODE_STATUS_CLOSED)
goto leave;
if (http_conn->content_length == 0) {
http_conn->parser_state = 0;
http_conn->waiting_response = FALSE;
pn_timer_restart (http_conn->timer);
process_queue (http_conn, &conn->error);
}
}
leave:
g_strfreev (tokens);
g_free (str);
}
if (tmp_error)
g_propagate_error (error, tmp_error);
pn_log ("end");
return status;
}
static GIOStatus
foo_write (PnNode *conn,
PnNode *prev,
const gchar *buf,
gsize count,
gsize *ret_bytes_written,
GError **error)
{
GIOStatus status = G_IO_STATUS_NORMAL;
PnHttpServer *http_conn;
GError *tmp_error = NULL;
gsize bytes_written = 0;
http_conn = PN_HTTP_SERVER (conn);
pn_debug ("stream=%p", conn->stream);
{
gchar *params;
gchar *header;
gchar *body = NULL;
gsize body_len;
gchar *auth = NULL;
gchar *session_id;
session_id = prev->foo_data;
if (session_id)
{
params = g_strdup_printf ("SessionID=%s",
session_id);
}
else
{
params = g_strdup_printf ("Action=open&Server=%s&IP=%s",
prev->type == PN_NODE_NS ? "NS" : "SB",
prev->hostname);
}
#ifdef HAVE_LIBPURPLE
auth = get_auth(conn);
#endif /* HAVE_LIBPURPLE */
/** @todo investigate why this returns NULL sometimes. */
header = g_strdup_printf ("POST http://%s/gateway/gateway.dll?%s HTTP/1.1\r\n"
"Accept: */*\r\n"
"User-Agent: MSMSGS\r\n"
"Host: %s\r\n"
"%s" /* Proxy auth */
"Proxy-Connection: Keep-Alive\r\n"
"Connection: Keep-Alive\r\n"
"Pragma: no-cache\r\n"
"Cache-Control: no-cache\r\n"
"Content-Type: application/x-msn-messenger\r\n"
"Content-Length: %zu\r\n\r\n",
http_conn->gateway,
params,
http_conn->gateway,
auth ? auth : "",
count);
g_free (params);
g_free (auth);
#ifdef PECAN_DEBUG_HTTP
pn_debug ("header=[%s]", header);
#endif
/** @todo this is inefficient */
if (header)
{
gsize header_len;
header_len = strlen (header);
body_len = header_len + count;
body = g_malloc (body_len);
memcpy (body, header, header_len);
memcpy (body + header_len, buf, count);
g_free (header);
}
if (body)
{
status = pn_stream_write_full (conn->stream, body, body_len, &bytes_written, &tmp_error);
g_free (body);
}
else
{
/** @todo this shouldn't happen. */
pn_error ("body is null!");
status = G_IO_STATUS_ERROR;
}
}
/** @todo investigate why multiple g_io_channel_write has memory leaks. */
#if 0
if (status == G_IO_STATUS_NORMAL)
{
status = pn_stream_write_full (conn->stream, buf, count, &bytes_written, &tmp_error);
}
#endif
http_conn->waiting_response = TRUE;
if (http_conn->timer)
pn_timer_stop (http_conn->timer);
if (http_conn->cur)
g_object_unref (http_conn->cur);
http_conn->cur = prev;
g_object_ref (G_OBJECT (http_conn->cur));
if (status == G_IO_STATUS_NORMAL) {
status = pn_stream_flush (conn->stream, &tmp_error);
if (status == G_IO_STATUS_AGAIN) {
http_conn->last_flush = status;
http_conn->write_watch = g_io_add_watch(conn->stream->channel,
G_IO_OUT, write_cb, http_conn);
/* fake status */
status = G_IO_STATUS_NORMAL;
}
}
if (status == G_IO_STATUS_NORMAL)
pn_log ("bytes_written=%zu", bytes_written);
else
pn_error ("not normal");
if (ret_bytes_written)
*ret_bytes_written = bytes_written;
if (tmp_error)