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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2015 ZeroTier, Inc.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#ifndef ZT_HTTPCLIENT_HPP
#define ZT_HTTPCLIENT_HPP
#include <string>
#include <map>
#include <set>
#include "Constants.hpp"
#include "Mutex.hpp"
namespace ZeroTier {
class HttpClient_Private_Request;
/**
* HTTP client that does queries in the background
*
* The handler method takes the following arguments: an arbitrary pointer, an
* HTTP response code, the URL queried, whether or not the message body was
* stored on disk, and the message body.
*
* If stored on disk, the body string contains the path and the file must be
* moved or deleted by the receiver when it's done. If an error occurs, the
* response code will be negative and the body will be the error message.
*
* All headers in the returned headers map will have their header names
* converted to lower case, e.g. "content-type".
*
* Currently only the "http" transport is guaranteed to be supported on all
* platforms.
*/
class HttpClient
{
public:
friend class HttpClient_Private_Request;
typedef void * Request;
HttpClient();
~HttpClient();
/**
* Empty map for convenience use
*/
static const std::map<std::string,std::string> NO_HEADERS;
/**
* Request a URL using the GET method
*/
inline Request GET(
const std::string &url,
const std::map<std::string,std::string> &headers,
unsigned int timeout,
void (*handler)(void *,int,const std::string &,const std::string &),
void *arg)
{
return _do("GET",url,headers,timeout,handler,arg);
}
/**
* Cancel a request
*
* If the request is not active, this does nothing. This may take some time
* depending on HTTP implementation. It may also not kill instantly, but
* it will prevent the handler function from ever being called and cause the
* request to die silently when complete.
*/
void cancel(Request req);
private:
Request _do(
const char *method,
const std::string &url,
const std::map<std::string,std::string> &headers,
unsigned int timeout,
void (*handler)(void *,int,const std::string &,const std::string &),
void *arg);
std::set<Request> _requests;
Mutex _requests_m;
};
} // namespace ZeroTier
#endif
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