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/*
* Copyright (C) 2009 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef INCL_CURLTRANSPORTAGENT
#define INCL_CURLTRANSPORTAGENT
#include "config.h"
#ifdef ENABLE_LIBCURL
#include <syncevo/TransportAgent.h>
#include <curl/curl.h>
#include <syncevo/declarations.h>
SE_BEGIN_CXX
/**
* message send/receive with curl
*
* The simple curl API is used, so sending blocks until the
* reply is ready.
*/
class CurlTransportAgent : public HTTPTransportAgent
{
public:
CurlTransportAgent();
~CurlTransportAgent();
virtual void setURL(const std::string &url);
virtual void setProxy(const std::string &proxy);
virtual void setProxyAuth(const std::string &user, const std::string &password);
virtual void setSSL(const std::string &cacerts,
bool verifyServer,
bool verifyHost);
virtual void setContentType(const std::string &type);
virtual void setUserAgent(const std::string &agent);
virtual void shutdown();
virtual void send(const char *data, size_t len);
virtual void cancel();
virtual Status wait(bool noReply = false);
virtual void getReply(const char *&data, size_t &len, std::string &contentType);
virtual void setTimeout(int seconds);
int processCallback();
void setAborting(bool aborting) {m_aborting = aborting;}
private:
CURL *m_easyHandle;
curl_slist *m_slist;
std::string m_contentType;
Status m_status;
bool m_aborting;
Timespec m_sendStartTime;
int m_timeoutSeconds;
/**
* libcurl < 7.17.0 does not copy strings passed into curl_easy_setopt().
* These are local copies that remain valid as long as needed.
*/
std::string m_url, m_proxy, m_auth, m_agent,
m_cacerts;
/** message buffer (owned by caller) */
const char *m_message;
/** number of valid bytes in m_message */
size_t m_messageLen;
/** number of sent bytes in m_message */
size_t m_messageSent;
/** reply buffer */
char *m_reply;
/** number of valid bytes in m_reply */
size_t m_replyLen;
/** total buffer size */
size_t m_replySize;
/** error text from curl, set via CURLOPT_ERRORBUFFER */
char m_curlErrorText[CURL_ERROR_SIZE];
/** CURLOPT_READFUNCTION, stream == CurlTransportAgent */
static size_t readDataCallback(void *buffer, size_t size, size_t nmemb, void *stream) throw();
size_t readData(void *buffer, size_t size) throw();
/** CURLOPT_WRITEFUNCTION, stream == CurlTransportAgent */
static size_t writeDataCallback(void *ptr, size_t size, size_t nmemb, void *stream) throw();
size_t writeData(void *buffer, size_t size) throw();
/** CURLOPT_PROGRESS callback, use this function to detect user abort */
static int progressCallback (void *ptr, double dltotal, double dlnow, double uptotal, double upnow);
/** check curl error code and turn into exception */
void checkCurl(CURLcode code, bool exception = true);
/**
* initialize curl if necessary, return new handle
*
* Never returns NULL, instead throws exceptions.
*/
static CURL *easyInit();
};
SE_END_CXX
#endif // ENABLE_LIBCURL
#endif // INCL_TRANSPORTAGENT
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