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/**
* @file llcurl.h
* @author Zero / Donovan
* @date 2006-10-15
* @brief A wrapper around libcurl.
*
* $LicenseInfo:firstyear=2006&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* 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;
* version 2.1 of the License only.
*
* 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
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLCURL_H
#define LL_LLCURL_H
#include "linden_common.h"
#include <sstream>
#include <string>
#include <vector>
#include <boost/intrusive_ptr.hpp>
#include <curl/curl.h> // TODO: remove dependency
#include "llbuffer.h"
#include "lliopipe.h"
#include "llsd.h"
class LLMutex;
// For whatever reason, this is not typedef'd in curl.h
typedef size_t (*curl_header_callback)(void *ptr, size_t size, size_t nmemb, void *stream);
class LLCurl
{
LOG_CLASS(LLCurl);
public:
class Easy;
class Multi;
struct TransferInfo
{
TransferInfo() : mSizeDownload(0.0), mTotalTime(0.0), mSpeedDownload(0.0) {}
F64 mSizeDownload;
F64 mTotalTime;
F64 mSpeedDownload;
};
class Responder
{
//LOG_CLASS(Responder);
public:
Responder();
virtual ~Responder();
/**
* @brief return true if the status code indicates success.
*/
static bool isGoodStatus(U32 status)
{
return((200 <= status) && (status < 300));
}
virtual void errorWithContent(
U32 status,
const std::string& reason,
const LLSD& content);
//< called by completed() on bad status
virtual void error(U32 status, const std::string& reason);
//< called by default error(status, reason, content)
virtual void result(const LLSD& content);
//< called by completed for good status codes.
virtual void completedRaw(
U32 status,
const std::string& reason,
const LLChannelDescriptors& channels,
const LLIOPipe::buffer_ptr_t& buffer);
/**< Override point for clients that may want to use this
class when the response is some other format besides LLSD
*/
virtual void completed(
U32 status,
const std::string& reason,
const LLSD& content);
/**< The default implemetnation calls
either:
* result(), or
* error()
*/
// Override to handle parsing of the header only. Note: this is the only place where the contents
// of the header can be parsed. In the ::completed call above only the body is contained in the LLSD.
virtual void completedHeader(U32 status, const std::string& reason, const LLSD& content);
// Used internally to set the url for debugging later.
void setURL(const std::string& url);
virtual bool followRedir()
{
return false;
}
public: /* but not really -- don't touch this */
U32 mReferenceCount;
private:
std::string mURL;
};
typedef boost::intrusive_ptr<Responder> ResponderPtr;
/**
* @ brief Set certificate authority file used to verify HTTPS certs.
*/
static void setCAFile(const std::string& file);
/**
* @ brief Set certificate authority path used to verify HTTPS certs.
*/
static void setCAPath(const std::string& path);
/**
* @ brief Return human-readable string describing libcurl version.
*/
static std::string getVersionString();
/**
* @ brief Get certificate authority file used to verify HTTPS certs.
*/
static const std::string& getCAFile() { return sCAFile; }
/**
* @ brief Get certificate authority path used to verify HTTPS certs.
*/
static const std::string& getCAPath() { return sCAPath; }
/**
* @ brief Initialize LLCurl class
*/
static void initClass();
/**
* @ brief Cleanup LLCurl class
*/
static void cleanupClass();
/**
* @ brief curl error code -> string
*/
static std::string strerror(CURLcode errorcode);
// For OpenSSL callbacks
static std::vector<LLMutex*> sSSLMutex;
// OpenSSL callbacks
static void ssl_locking_callback(int mode, int type, const char *file, int line);
static unsigned long ssl_thread_id(void);
private:
static std::string sCAPath;
static std::string sCAFile;
static const unsigned int MAX_REDIRECTS;
};
namespace boost
{
void intrusive_ptr_add_ref(LLCurl::Responder* p);
void intrusive_ptr_release(LLCurl::Responder* p);
};
class LLCurlRequest
{
public:
typedef std::vector<std::string> headers_t;
LLCurlRequest();
~LLCurlRequest();
void get(const std::string& url, LLCurl::ResponderPtr responder);
bool getByteRange(const std::string& url, const headers_t& headers, S32 offset, S32 length, LLCurl::ResponderPtr responder);
bool post(const std::string& url, const headers_t& headers, const LLSD& data, LLCurl::ResponderPtr responder);
bool post(const std::string& url, const headers_t& headers, const std::string& data, LLCurl::ResponderPtr responder);
S32 process();
S32 getQueued();
private:
void addMulti();
LLCurl::Easy* allocEasy();
bool addEasy(LLCurl::Easy* easy);
private:
typedef std::set<LLCurl::Multi*> curlmulti_set_t;
curlmulti_set_t mMultiSet;
LLCurl::Multi* mActiveMulti;
S32 mActiveRequestCount;
BOOL mProcessing;
U32 mThreadID; // debug
};
class LLCurlEasyRequest
{
public:
LLCurlEasyRequest();
~LLCurlEasyRequest();
void setopt(CURLoption option, S32 value);
void setoptString(CURLoption option, const std::string& value);
void setPost(char* postdata, S32 size);
void setHeaderCallback(curl_header_callback callback, void* userdata);
void setWriteCallback(curl_write_callback callback, void* userdata);
void setReadCallback(curl_read_callback callback, void* userdata);
void setSSLCtxCallback(curl_ssl_ctx_callback callback, void* userdata);
void slist_append(const char* str);
void sendRequest(const std::string& url);
void requestComplete();
S32 perform();
bool getResult(CURLcode* result, LLCurl::TransferInfo* info = NULL);
std::string getErrorString();
private:
CURLMsg* info_read(S32* queue, LLCurl::TransferInfo* info);
private:
LLCurl::Multi* mMulti;
LLCurl::Easy* mEasy;
bool mRequestSent;
bool mResultReturned;
};
#endif // LL_LLCURL_H
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