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/**
* Interface to the matrix client/server API
*
* 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 02111-1301 USA
*/
#include "matrix-api.h"
/* std lib */
#include <string.h>
/* json-glib */
#include <json-glib/json-glib.h>
/* libpurple */
#include <debug.h>
#include "libmatrix.h"
typedef struct {
MatrixAccount *account;
MatrixApiCallback callback;
gpointer user_data;
} MatrixApiRequestData;
/**
* Parse the body of an API response
*
* @param ret_data pointer to the response data
* @param parser returns a pointer to the JsonParser, or NULL if there
* is no body. Use g_object_unref() to release it.
* @param error_message returns a pointer to an error message on error. Do not
* free this.
* @return a pointer to the start of the body, or NULL if there is no body
*/
static const gchar *matrix_api_parse_body(const gchar *ret_data,
JsonParser **parser,
const gchar **error_message)
{
const gchar *body_pointer;
GError *err = NULL;
g_assert(parser != NULL);
g_assert(error_message != NULL);
*parser = NULL;
*error_message = NULL;
/* find the start of the body */
body_pointer = strstr(ret_data, "\r\n\r\n");
if(body_pointer == NULL) {
/* no separator */
return NULL;
}
body_pointer += 4;
if(*body_pointer == '\0') {
/* empty body */
return NULL;
}
/* we have a body - parse it as JSON */
*parser = json_parser_new();
if(!json_parser_load_from_data(*parser, body_pointer, -1, &err)) {
purple_debug_info("matrixprpl",
"unable to parse JSON: %s\n",
err->message);
*error_message = _("Error parsing response");
g_error_free(err);
return body_pointer;
}
return body_pointer;
}
/**
* The callback we give to purple_util_fetch_url_request - does some
* initial processing of the response
*/
static void matrix_api_complete(PurpleUtilFetchUrlData *url_data,
gpointer user_data,
const gchar *ret_data,
gsize ret_len,
const gchar *error_message)
{
MatrixApiRequestData *data = (MatrixApiRequestData *)user_data;
int response_code = -1;
gchar *response_message = NULL;
JsonParser *parser;
JsonNode *root;
const gchar *body_start;
if (!error_message) {
/* parse the response line */
gchar *response_line;
gchar **splits;
gchar *ptr;
ptr = strchr(ret_data, '\r');
response_line = g_strndup(ret_data,
ptr == NULL ? ret_len : ptr - ret_data);
splits = g_strsplit(response_line, " ", 3);
if(splits[0] == NULL || splits[1] == NULL || splits[2] == NULL) {
/* invalid response line */
purple_debug_info("matrixprpl",
"unable to parse response line %s\n",
response_line);
error_message = _("Error parsing response");
} else {
response_code = strtol(splits[1], NULL, 10);
response_message = g_strdup(splits[2]);
}
g_free(response_line);
g_strfreev(splits);
}
if (!error_message) {
body_start = matrix_api_parse_body(ret_data, &parser, &error_message);
if(parser)
root = json_parser_get_root(parser);
}
(data->callback)(data->account, data->user_data,
response_code, response_message,
body_start, root, error_message);
/* free the JSON parser, and all of the node structures */
if(parser)
g_object_unref(parser);
g_free(data);
g_free(response_message);
}
/**
* Start an HTTP call to the API
*
* @param max_len maximum number of bytes to return from the request. -1 for
* default (512K).
*/
static PurpleUtilFetchUrlData *matrix_api_start(const gchar *url,
MatrixAccount *account,
MatrixApiCallback callback,
gpointer user_data,
gssize max_len)
{
MatrixApiRequestData *data;
data = g_new0(MatrixApiRequestData, 1);
data->account = account;
data->callback = callback;
data->user_data = user_data;
/* TODO: implement the per-account proxy settings */
return purple_util_fetch_url_request_len(url, TRUE, NULL, TRUE, NULL,
TRUE, max_len,
matrix_api_complete, data);
}
PurpleUtilFetchUrlData *matrix_sync(MatrixAccount *account,
const gchar *since,
MatrixApiCallback callback,
gpointer user_data)
{
GString *url;
PurpleUtilFetchUrlData *fetch_data;
url = g_string_new("");
g_string_append_printf(url,
"https://%s/_matrix/client/v2_alpha/sync?access_token=%s",
account->homeserver, account->access_token);
if(since != NULL)
g_string_append_printf(url, "&timeout=30000&since=%s", since);
purple_debug_info("matrixprpl", "request %s\n", url->str);
/* XXX: stream the response, so that we don't need to allocate so much
* memory? But it's JSON
*/
fetch_data = matrix_api_start(url->str, account, callback, user_data,
10*1024*1024);
g_string_free(url, TRUE);
return fetch_data;
}
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