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/**
* @file _httplibcurl.cpp
* @brief Internal definitions of the Http libcurl thread
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2012, 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
* $/LicenseInfo$
*/
#include "_httplibcurl.h"
#include "httpheaders.h"
#include "bufferarray.h"
#include "_httpoprequest.h"
#include "_httppolicy.h"
namespace LLCore
{
HttpLibcurl::HttpLibcurl(HttpService * service)
: mService(service)
{
for (int policy_class(0); policy_class < HttpRequest::POLICY_CLASS_LIMIT; ++policy_class)
{
mMultiHandles[policy_class] = 0;
}
// Create multi handle for default class
mMultiHandles[0] = curl_multi_init();
}
HttpLibcurl::~HttpLibcurl()
{
// *FIXME: need to cancel requests in this class, not in op class.
while (! mActiveOps.empty())
{
active_set_t::iterator item(mActiveOps.begin());
(*item)->cancel();
(*item)->release();
mActiveOps.erase(item);
}
for (int policy_class(0); policy_class < HttpRequest::POLICY_CLASS_LIMIT; ++policy_class)
{
if (mMultiHandles[policy_class])
{
// *FIXME: Do some multi cleanup here first
curl_multi_cleanup(mMultiHandles[policy_class]);
mMultiHandles[policy_class] = 0;
}
}
mService = NULL;
}
void HttpLibcurl::init()
{}
void HttpLibcurl::term()
{}
HttpService::ELoopSpeed HttpLibcurl::processTransport()
{
HttpService::ELoopSpeed ret(HttpService::REQUEST_SLEEP);
// Give libcurl some cycles to do I/O & callbacks
for (int policy_class(0); policy_class < HttpRequest::POLICY_CLASS_LIMIT; ++policy_class)
{
if (! mMultiHandles[policy_class])
continue;
int running(0);
CURLMcode status(CURLM_CALL_MULTI_PERFORM);
do
{
running = 0;
status = curl_multi_perform(mMultiHandles[policy_class], &running);
}
while (0 != running && CURLM_CALL_MULTI_PERFORM == status);
// Run completion on anything done
CURLMsg * msg(NULL);
int msgs_in_queue(0);
while ((msg = curl_multi_info_read(mMultiHandles[policy_class], &msgs_in_queue)))
{
if (CURLMSG_DONE == msg->msg)
{
CURL * handle(msg->easy_handle);
CURLcode result(msg->data.result);
if (completeRequest(mMultiHandles[policy_class], handle, result))
{
// Request is still active, don't get too sleepy
ret = (std::min)(ret, HttpService::NORMAL);
}
handle = NULL; // No longer valid on return
}
else if (CURLMSG_NONE == msg->msg)
{
// Ignore this... it shouldn't mean anything.
;
}
else
{
// *FIXME: Issue a logging event for this.
;
}
msgs_in_queue = 0;
}
}
if (! mActiveOps.empty())
{
ret = (std::min)(ret, HttpService::NORMAL);
}
return ret;
}
void HttpLibcurl::addOp(HttpOpRequest * op)
{
llassert_always(op->mReqPolicy < HttpRequest::POLICY_CLASS_LIMIT);
llassert_always(mMultiHandles[op->mReqPolicy] != NULL);
// Create standard handle
if (! op->prepareRequest(mService))
{
// Couldn't issue request, fail with notification
// *FIXME: Need failure path
return;
}
// Make the request live
curl_multi_add_handle(mMultiHandles[op->mReqPolicy], op->mCurlHandle);
op->mCurlActive = true;
// On success, make operation active
mActiveOps.insert(op);
}
bool HttpLibcurl::completeRequest(CURLM * multi_handle, CURL * handle, CURLcode status)
{
HttpOpRequest * op(NULL);
curl_easy_getinfo(handle, CURLINFO_PRIVATE, &op);
// *FIXME: check the pointer
if (handle != op->mCurlHandle || ! op->mCurlActive)
{
// *FIXME: This is a sanity check that needs validation/termination.
;
}
active_set_t::iterator it(mActiveOps.find(op));
if (mActiveOps.end() == it)
{
// *FIXME: Fatal condition. This must be here.
;
}
else
{
mActiveOps.erase(it);
}
// Deactivate request
op->mCurlActive = false;
// Set final status of request
if (op->mStatus)
{
// Only set if it hasn't failed by other mechanisms yet
op->mStatus = HttpStatus(HttpStatus::EXT_CURL_EASY, status);
}
if (op->mStatus)
{
int http_status(200);
curl_easy_getinfo(handle, CURLINFO_RESPONSE_CODE, &http_status);
op->mStatus = LLCore::HttpStatus(http_status);
}
// Detach from multi and recycle handle
curl_multi_remove_handle(multi_handle, handle);
curl_easy_cleanup(handle);
op->mCurlHandle = NULL;
HttpPolicy & policy(mService->getPolicy());
bool still_active(policy.stageAfterCompletion(op));
return still_active;
}
int HttpLibcurl::getActiveCount() const
{
return mActiveOps.size();
}
int HttpLibcurl::getActiveCountInClass(int /* policy_class */) const
{
return getActiveCount();
}
// ---------------------------------------
// Free functions
// ---------------------------------------
struct curl_slist * append_headers_to_slist(const HttpHeaders * headers, struct curl_slist * slist)
{
for (HttpHeaders::container_t::const_iterator it(headers->mHeaders.begin());
headers->mHeaders.end() != it;
++it)
{
slist = curl_slist_append(slist, (*it).c_str());
}
return slist;
}
} // end namespace LLCore
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