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/**
* @file lliohttpserver.h
* @brief Declaration of function for creating an HTTP wire server
* @see LLIOServerSocket, LLPumpIO
*
* $LicenseInfo:firstyear=2005&license=viewerlgpl$
* 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_LLIOHTTPSERVER_H
#define LL_LLIOHTTPSERVER_H
#include "llchainio.h"
#include "llhttpnode.h"
class LLPumpIO;
// common strings use for populating the context. bascally 'request',
// 'wildcard', and 'headers'.
extern const std::string CONTEXT_REQUEST;
extern const std::string CONTEXT_RESPONSE;
extern const std::string CONTEXT_VERB;
extern const std::string CONTEXT_HEADERS;
extern const std::string HTTP_VERB_GET;
extern const std::string HTTP_VERB_PUT;
extern const std::string HTTP_VERB_POST;
extern const std::string HTTP_VERB_DELETE;
extern const std::string HTTP_VERB_OPTIONS;
class LLIOHTTPServer
{
public:
typedef void (*timing_callback_t)(const char* hashed_name, F32 time, void* data);
static LLHTTPNode& create(apr_pool_t* pool, LLPumpIO& pump, U16 port);
/**< Creates an HTTP wire server on the pump for the given TCP port.
*
* Returns the root node of the new server. Add LLHTTPNode instances
* to this root.
*
* Nodes that return NULL for getProtocolHandler(), will use the
* default handler that interprets HTTP on the wire and converts
* it into calls to get(), put(), post(), del() with appropriate
* LLSD arguments and results.
*
* To have nodes that implement some other wire protocol (XML-RPC
* for example), use the helper templates below.
*/
static void createPipe(LLPumpIO::chain_t& chain,
const LLHTTPNode& root, const LLSD& ctx);
/**< Create a pipe on the chain that handles HTTP requests.
* The requests are served by the node tree given at root.
*
* This is primarily useful for unit testing.
*/
static void setTimingCallback(timing_callback_t callback, void* data);
/**< Register a callback function that will be called every time
* a GET, PUT, POST, or DELETE is handled.
*
* This is used to time the LLHTTPNode handler code, which often hits
* the database or does other, slow operations. JC
*/
};
/* @name Helper Templates
*
* These templates make it easy to create nodes that use thier own protocol
* handlers rather than the default. Typically, you subclass LLIOPipe to
* implement the protocol, and then add a node using the templates:
*
* rootNode->addNode("thing", new LLHTTPNodeForPipe<LLThingPipe>);
*
* The templates are:
*
* LLChainIOFactoryForPipe
* - a simple factory that builds instances of a pipe
*
* LLHTTPNodeForFacotry
* - a HTTP node that uses a factory as the protocol handler
*
* LLHTTPNodeForPipe
* - a HTTP node that uses a simple factory based on a pipe
*/
//@{
template<class Pipe>
class LLChainIOFactoryForPipe : public LLChainIOFactory
{
public:
virtual bool build(LLPumpIO::chain_t& chain, LLSD context) const
{
chain.push_back(LLIOPipe::ptr_t(new Pipe));
return true;
}
};
template<class Factory>
class LLHTTPNodeForFactory : public LLHTTPNode
{
public:
const LLChainIOFactory* getProtocolHandler() const
{ return &mProtocolHandler; }
private:
Factory mProtocolHandler;
};
//@}
template<class Pipe>
class LLHTTPNodeForPipe : public LLHTTPNodeForFactory<
LLChainIOFactoryForPipe<Pipe> >
{
};
#endif // LL_LLIOHTTPSERVER_H
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