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/** 
 * @file llhttpclient_test.cpp
 * @brief Testing the HTTP client classes.
 *
 * $LicenseInfo:firstyear=2006&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

/**
 *
 * These classes test the HTTP client framework.
 *
 */

#include <tut/tut.hpp>
#include "linden_common.h"

#include "lltut.h"
#include "llhttpclient.h"
#include "llformat.h"
#include "llpipeutil.h"
#include "llproxy.h"
#include "llpumpio.h"

#include "llsdhttpserver.h"
#include "lliohttpserver.h"
#include "lliosocket.h"
#include "stringize.h"

namespace tut
{
	LLSD storage;
	
	class LLSDStorageNode : public LLHTTPNode
	{
	public:
		LLSD simpleGet() const					{ return storage; }
		LLSD simplePut(const LLSD& value) const	{ storage = value; return LLSD(); }
	};

	class ErrorNode : public LLHTTPNode
	{
	public:
		void get(ResponsePtr r, const LLSD& context) const
			{ r->status(599, "Intentional error"); }
		void post(ResponsePtr r, const LLSD& context, const LLSD& input) const
			{ r->status(input["status"], input["reason"]); }
	};

	class TimeOutNode : public LLHTTPNode
	{
	public:
		void get(ResponsePtr r, const LLSD& context) const
		{
            /* do nothing, the request will eventually time out */ 
		}
	};

	LLHTTPRegistration<LLSDStorageNode> gStorageNode("/test/storage");
	LLHTTPRegistration<ErrorNode>		gErrorNode("/test/error");
	LLHTTPRegistration<TimeOutNode>		gTimeOutNode("/test/timeout");

	struct HTTPClientTestData
	{
	public:
		HTTPClientTestData():
			local_server(STRINGIZE("http://127.0.0.1:" << getenv("PORT") << "/"))
		{
			apr_pool_create(&mPool, NULL);
			LLCurl::initClass(false);
			mServerPump = new LLPumpIO(mPool);
			mClientPump = new LLPumpIO(mPool);

			LLHTTPClient::setPump(*mClientPump);
		}
		
		~HTTPClientTestData()
		{
			delete mServerPump;
			delete mClientPump;
			LLProxy::cleanupClass();
			apr_pool_destroy(mPool);
		}

		void setupTheServer()
		{
			LLHTTPNode& root = LLIOHTTPServer::create(mPool, *mServerPump, 8888);

			LLHTTPStandardServices::useServices();
			LLHTTPRegistrar::buildAllServices(root);
		}
		
		void runThePump(float timeout = 100.0f)
		{
			LLTimer timer;
			timer.setTimerExpirySec(timeout);

			while(!mSawCompleted && !mSawCompletedHeader && !timer.hasExpired())
			{
				if (mServerPump)
				{
					mServerPump->pump();
					mServerPump->callback();
				}
				if (mClientPump)
				{
					mClientPump->pump();
					mClientPump->callback();
				}
			}
		}

		void killServer()
		{
			delete mServerPump;
			mServerPump = NULL;
		}

		const std::string local_server;

	private:
		apr_pool_t* mPool;
		LLPumpIO* mServerPump;
		LLPumpIO* mClientPump;

	protected:
		void ensureStatusOK()
		{
			if (mSawError)
			{
				std::string msg =
					llformat("error() called when not expected, status %d",
						mStatus); 
				fail(msg);
			}
		}
	
		void ensureStatusError()
		{
			if (!mSawError)
			{
				fail("error() wasn't called");
			}
		}
		
		LLSD getResult()
		{
			return mResult;
		}
		LLSD getHeader()
		{
			return mHeader;
		}
	
	protected:
		bool mSawError;
		U32 mStatus;
		std::string mReason;
		bool mSawCompleted;
		bool mSawCompletedHeader;
		LLSD mResult;
		LLSD mHeader;
		bool mResultDeleted;

		class Result : public LLHTTPClient::Responder
		{
		protected:
			Result(HTTPClientTestData& client)
				: mClient(client)
			{
			}
		
		public:
			static Result* build(HTTPClientTestData& client)
			{
				return new Result(client);
			}
			
			~Result()
			{
				mClient.mResultDeleted = true;
			}
			
			virtual void error(U32 status, const std::string& reason)
			{
				mClient.mSawError = true;
				mClient.mStatus = status;
				mClient.mReason = reason;
			}

			virtual void result(const LLSD& content)
			{
				mClient.mResult = content;
			}

			virtual void completed(
							U32 status, const std::string& reason,
							const LLSD& content)
			{
				LLHTTPClient::Responder::completed(status, reason, content);
				
				mClient.mSawCompleted = true;
			}

			virtual void completedHeader(
				U32 status, const std::string& reason,
				const LLSD& content)
			{
				mClient.mHeader = content;
				mClient.mSawCompletedHeader = true;
			}

		private:
			HTTPClientTestData& mClient;
		};

		friend class Result;

	protected:
		LLHTTPClient::ResponderPtr newResult()
		{
			mSawError = false;
			mStatus = 0;
			mSawCompleted = false;
			mSawCompletedHeader = false;
			mResult.clear();
			mHeader.clear();
			mResultDeleted = false;
			
			return Result::build(*this);
		}
	};
	
	
	typedef test_group<HTTPClientTestData>	HTTPClientTestGroup;
	typedef HTTPClientTestGroup::object		HTTPClientTestObject;
	HTTPClientTestGroup httpClientTestGroup("http_client");

	template<> template<>
	void HTTPClientTestObject::test<1>()
	{
		LLHTTPClient::get(local_server, newResult());
		runThePump();
		ensureStatusOK();
		ensure("result object wasn't destroyed", mResultDeleted);
	}

	template<> template<>
	void HTTPClientTestObject::test<2>()
	{
		// Please nobody listen on this particular port...
		LLHTTPClient::get("http://127.0.0.1:7950", newResult());
		runThePump();
		ensureStatusError();
	}

	template<> template<>
		void HTTPClientTestObject::test<3>()
	{
		LLSD sd;

		sd["list"][0]["one"] = 1;
		sd["list"][0]["two"] = 2;
		sd["list"][1]["three"] = 3;
		sd["list"][1]["four"] = 4;
		
		setupTheServer();

		LLHTTPClient::post("http://localhost:8888/web/echo", sd, newResult());
		runThePump();
		ensureStatusOK();
		ensure_equals("echoed result matches", getResult(), sd);
	}

	template<> template<>
		void HTTPClientTestObject::test<4>()
	{
		LLSD sd;

		sd["message"] = "This is my test message.";

		setupTheServer();
		LLHTTPClient::put("http://localhost:8888/test/storage", sd, newResult());
		runThePump();
		ensureStatusOK();

		LLHTTPClient::get("http://localhost:8888/test/storage", newResult());
		runThePump();
		ensureStatusOK();
		ensure_equals("echoed result matches", getResult(), sd);
	
	}

	template<> template<>
		void HTTPClientTestObject::test<5>()
	{
		LLSD sd;
		sd["status"] = 543;
		sd["reason"] = "error for testing";

		setupTheServer();

		LLHTTPClient::post("http://localhost:8888/test/error", sd, newResult());
		runThePump();
		ensureStatusError();
		ensure_contains("reason", mReason, sd["reason"]);
	}

	template<> template<>
		void HTTPClientTestObject::test<6>()
	{
		setupTheServer();

		LLHTTPClient::get("http://localhost:8888/test/timeout", newResult());
		runThePump(1.0f);
		killServer();
		runThePump();
		ensureStatusError();
		ensure_equals("reason", mReason, "STATUS_ERROR");
	}

	template<> template<>
		void HTTPClientTestObject::test<7>()
	{
		// Can not use the little mini server.  The blocking request
		// won't ever let it run.  Instead get from a known LLSD
		// source and compare results with the non-blocking get which
		// is tested against the mini server earlier.
		LLHTTPClient::get(local_server, newResult());
		runThePump();
		ensureStatusOK();
		LLSD expected = getResult();

		LLSD result;
		result = LLHTTPClient::blockingGet(local_server);
		LLSD body = result["body"];
		ensure_equals("echoed result matches", body.size(), expected.size());
	}
	template<> template<>
		void HTTPClientTestObject::test<8>()
	{
		// This is testing for the presence of the Header in the returned results
		// from an HTTP::get call.
		LLHTTPClient::get(local_server, newResult());
		runThePump();
		ensureStatusOK();
		LLSD header = getHeader();
		ensure("got a header", ! header.emptyMap().asBoolean());
	}
	template<> template<>
	void HTTPClientTestObject::test<9>()
	{
		LLHTTPClient::head(local_server, newResult());
		runThePump();
		ensureStatusOK();
		ensure("result object wasn't destroyed", mResultDeleted);
	}
}