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/*
* script functions of utils module
*
* Copyright (C) 2008 Juha Heinanen
* Copyright (C) 2013 Carsten Bock, ng-voice GmbH
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio 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
*
* Kamailio 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
*
*/
/*!
* \file
* \brief SIP-router utils ::
* \ingroup utils
* Module: \ref utils
*/
#include <curl/curl.h>
#include "../../mod_fix.h"
#include "../../pvar.h"
#include "../../route_struct.h"
#include "../../ut.h"
#include "../../mem/mem.h"
#include "../../parser/msg_parser.h"
#include "../../lvalue.h"
#include "utils.h"
/*
* curl write function that saves received data as zero terminated
* to stream. Returns the amount of data taken care of.
*/
size_t write_function( void *ptr, size_t size, size_t nmemb, void *stream)
{
/* Allocate memory and copy */
char* data;
data = (char*)pkg_malloc((size* nmemb) + 1);
if (data == NULL) {
LM_ERR("cannot allocate memory for stream\n");
return CURLE_WRITE_ERROR;
}
memcpy(data, (char*)ptr, size* nmemb);
data[nmemb] = '\0';
*((char**) stream) = data;
return size* nmemb;
}
/*
* Performs http_query and saves possible result (first body line of reply)
* to pvar.
*/
int http_query(struct sip_msg* _m, char* _url, char* _dst, char* _post)
{
CURL *curl;
CURLcode res;
str value, post_value;
char *url, *at, *post;
char* stream;
long stat;
pv_spec_t *dst;
pv_value_t val;
double download_size;
if (fixup_get_svalue(_m, (gparam_p)_url, &value) != 0) {
LM_ERR("cannot get page value\n");
return -1;
}
curl = curl_easy_init();
if (curl == NULL) {
LM_ERR("failed to initialize curl\n");
return -1;
}
url = pkg_malloc(value.len + 1);
if (url == NULL) {
curl_easy_cleanup(curl);
LM_ERR("cannot allocate pkg memory for url\n");
return -1;
}
memcpy(url, value.s, value.len);
*(url + value.len) = (char)0;
curl_easy_setopt(curl, CURLOPT_URL, url);
if (_post) {
/* Now specify we want to POST data */
curl_easy_setopt(curl, CURLOPT_POST, 1L);
if (fixup_get_svalue(_m, (gparam_p)_post, &post_value) != 0) {
LM_ERR("cannot get post value\n");
pkg_free(url);
return -1;
}
post = pkg_malloc(post_value.len + 1);
if (post == NULL) {
curl_easy_cleanup(curl);
pkg_free(url);
LM_ERR("cannot allocate pkg memory for post\n");
return -1;
}
memcpy(post, post_value.s, post_value.len);
*(post + post_value.len) = (char)0;
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post);
}
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, (long)1);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, (long)http_query_timeout);
stream = NULL;
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_function);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &stream);
res = curl_easy_perform(curl);
pkg_free(url);
if (_post) {
pkg_free(post);
}
if (res != CURLE_OK) {
/* http://curl.haxx.se/libcurl/c/libcurl-errors.html */
if (res == CURLE_COULDNT_CONNECT) {
LM_WARN("failed to connect() to host\n");
} else if ( res == CURLE_COULDNT_RESOLVE_HOST ) {
LM_WARN("couldn't resolve host\n");
} else {
LM_ERR("failed to perform curl (%d)\n", res);
}
curl_easy_cleanup(curl);
if(stream)
pkg_free(stream);
return -1;
}
curl_easy_getinfo(curl, CURLINFO_HTTP_CODE, &stat);
if ((stat >= 200) && (stat < 500)) {
curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &download_size);
LM_DBG("http_query download size: %u\n", (unsigned int)download_size);
/* search for line feed */
at = memchr(stream, (char)10, download_size);
if (at == NULL) {
/* not found: use whole stream */
at = stream + (unsigned int)download_size;
}
val.rs.s = stream;
val.rs.len = at - stream;
LM_DBG("http_query result: %.*s\n", val.rs.len, val.rs.s);
val.flags = PV_VAL_STR;
dst = (pv_spec_t *)_dst;
dst->setf(_m, &dst->pvp, (int)EQ_T, &val);
}
curl_easy_cleanup(curl);
pkg_free(stream);
return stat;
}
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