void HttpServer::setSessionCallback(HttpSession::PTR httpSession, HTTPPARSER_CALLBACK callback, CLOSE_CALLBACK closeCallback)
{
/*TODO::keep alive and timeout close */
TCPSession::PTR session = httpSession->getSession();
HTTPParser* httpParser = new HTTPParser(HTTP_BOTH);
session->setUD((int64_t)httpParser);
session->setCloseCallback([closeCallback, httpSession](TCPSession::PTR session){
HTTPParser* httpParser = (HTTPParser*)session->getUD();
delete httpParser;
if (closeCallback != nullptr)
{
closeCallback(httpSession);
}
});
session->setDataCallback([this, callback, httpSession](TCPSession::PTR session, const char* buffer, size_t len){
int retlen = 0;
HTTPParser* httpParser = (HTTPParser*)session->getUD();
if (httpParser->isWebSocket())
{
std::string frame(buffer, len);
std::string payload;
uint8_t opcode; /*TODO::opcode是否回传给回调函数*/
if (WebSocketFormat::wsFrameExtract(frame, payload, opcode))
{
callback(*httpParser, httpSession, payload.c_str(), payload.size());
retlen = len;
}
}
else
{
retlen = httpParser->tryParse(buffer, len);
if (httpParser->isCompleted())
{
if (httpParser->isWebSocket())
{
std::string response = WebSocketFormat::wsHandshake(httpParser->getValue("Sec-WebSocket-Key"));
session->send(response.c_str(), response.size());
}
else
{
callback(*httpParser, httpSession, nullptr, 0);
if (httpParser->isKeepAlive())
{
/*清除本次http报文数据，为下一次http报文准备*/
httpParser->clearParse();
}
}
}
}
return retlen;
});
}
int main(int argc, char **argv)
{
if (argc != 4)
{
fprintf(stderr, "Usage: <listen port> <backend ip> <backend port>");
exit(-1);
}
int bindPort = atoi(argv[1]);
string backendIP = argv[2];
int backendPort = atoi(argv[3]);
auto tcpService = std::make_shared<WrapTcpService>();
tcpService->startWorkThread(std::thread::hardware_concurrency());
auto asyncConnector = AsyncConnector::Create();
asyncConnector->startWorkerThread();
auto listenThread = ListenThread::Create();
// listen for front http client
listenThread->startListen(false, "0.0.0.0", bindPort, [tcpService, asyncConnector, backendIP, backendPort](sock fd) {
tcpService->addSession(fd, [tcpService, asyncConnector, backendIP, backendPort](const TCPSession::PTR& session) {
session->setUD(static_cast<int64_t>(1));
std::shared_ptr<TCPSession::PTR> shareBackendSession = std::make_shared<TCPSession::PTR>(nullptr);
std::shared_ptr<std::vector<string>> cachePacket = std::make_shared<std::vector<std::string>>();
/* new connect to backend server */
asyncConnector->asyncConnect(backendIP.c_str(), backendPort, std::chrono::seconds(10), [tcpService, session, shareBackendSession, cachePacket](sock fd) {
if (true)
{
tcpService->addSession(fd, [=](const TCPSession::PTR& backendSession) {
auto ud = brynet::net::cast<int64_t>(session->getUD());
if (*ud == -1) /*if http client already close*/
{
backendSession->postDisConnect();
return;
}
*shareBackendSession = backendSession;
for (auto& p : *cachePacket)
{
backendSession->send(p.c_str(), p.size());
}
cachePacket->clear();
backendSession->setDisConnectCallback([=](const TCPSession::PTR& backendSession) {
*shareBackendSession = nullptr;
auto ud = brynet::net::cast<int64_t>(session->getUD());
if (*ud != -1)
{
session->postDisConnect();
}
});
backendSession->setDataCallback([=](const TCPSession::PTR& backendSession, const char* buffer, size_t size) {
/* recieve data from backend server, then send to http client */
session->send(buffer, size);
return size;
});
}, false, nullptr, 32 * 1024, false);
}
}, nullptr);
session->setDataCallback([=](const TCPSession::PTR&, const char* buffer, size_t size) {
TCPSession::PTR backendSession = *shareBackendSession;
if (backendSession == nullptr)
{
/*cache it*/
cachePacket->push_back(std::string(buffer, size));
}
else
{
/* receive data from http client, then send to backend server */
backendSession->send(buffer, size);
}
return size;
});
session->setDisConnectCallback([=](const TCPSession::PTR& session) {
/*if http client close, then close it's backend server */
TCPSession::PTR backendSession = *shareBackendSession;
if (backendSession != nullptr)
{
backendSession->postDisConnect();
}
session->setUD(-1);
});
}, false, nullptr, 32 * 1024);
});
std::cin.get();
}
int onSessionMsg(TCPSession::PTR session, const char* buffer, size_t len)
{
session->send(buffer, len);
return len;
}