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#ifdef _WIN32
#include <winsock2.h>
#include <windows.h>
#endif
#include "uscxml/server/HTTPServer.h"
#include "uscxml/Message.h"
#include <iostream>
#include <event2/dns.h>
#include <event2/event.h>
#include <event2/buffer.h>
#include <event2/http.h>
#include <event2/keyvalq_struct.h>
#include <event2/http_struct.h>
#include <event2/thread.h>
#include <string.h>
#include <glog/logging.h>
#include <boost/algorithm/string.hpp>
#ifndef _WIN32
#include <netdb.h>
#include <arpa/inet.h>
#endif
#ifdef BUILD_AS_PLUGINS
#include <Pluma/Connector.hpp>
#endif
namespace uscxml {
HTTPServer::HTTPServer(unsigned short port) {
_port = port;
_base = event_base_new();
_http = evhttp_new(_base);
_handle = NULL;
while((_handle = evhttp_bind_socket_with_handle(_http, INADDR_ANY, _port)) == NULL) {
_port++;
}
determineAddress();
}
HTTPServer::~HTTPServer() {
}
HTTPServer* HTTPServer::_instance = NULL;
tthread::recursive_mutex HTTPServer::_instanceMutex;
HTTPServer* HTTPServer::getInstance(int port) {
tthread::lock_guard<tthread::recursive_mutex> lock(_instanceMutex);
if (_instance == NULL) {
#ifndef _WIN32
evthread_use_pthreads();
#else
evthread_use_windows_threads();
#endif
_instance = new HTTPServer(port);
_instance->start();
}
return _instance;
}
void HTTPServer::httpRecvReqCallback(struct evhttp_request *req, void *callbackData) {
// std::cout << (uintptr_t)req << ": Replying" << std::endl;
// evhttp_send_reply(req, 200, NULL, NULL);
// return;
Request request;
request.curlReq = req;
switch (evhttp_request_get_command(req)) {
case EVHTTP_REQ_GET:
request.type = "GET";
break;
case EVHTTP_REQ_POST:
request.type = "POST";
break;
case EVHTTP_REQ_HEAD:
request.type = "HEAD";
break;
case EVHTTP_REQ_PUT:
request.type = "PUT";
break;
case EVHTTP_REQ_DELETE:
request.type = "DELETE";
break;
case EVHTTP_REQ_OPTIONS:
request.type = "OPTIONS";
break;
case EVHTTP_REQ_TRACE:
request.type = "TRACE";
break;
case EVHTTP_REQ_CONNECT:
request.type = "CONNECT";
break;
case EVHTTP_REQ_PATCH:
request.type = "PATCH";
break;
default:
request.type = "unknown";
break;
}
struct evkeyvalq *headers;
struct evkeyval *header;
struct evbuffer *buf;
// map headers to event structure
headers = evhttp_request_get_input_headers(req);
for (header = headers->tqh_first; header; header = header->next.tqe_next) {
request.headers[header->key] = header->value;
}
request.remoteHost = req->remote_host;
request.remotePort = req->remote_port;
request.httpMajor = req->major;
request.httpMinor = req->minor;
request.uri = req->uri;
// get content
buf = evhttp_request_get_input_buffer(req);
while (evbuffer_get_length(buf)) {
int n;
char cbuf[1024];
n = evbuffer_remove(buf, cbuf, sizeof(buf)-1);
if (n > 0) {
request.content.append(cbuf, n);
}
}
((HTTPServlet*)callbackData)->httpRecvRequest(request);
}
void HTTPServer::reply(const Reply& reply) {
struct evbuffer *evb = evbuffer_new();
std::map<std::string, std::string>::const_iterator headerIter = reply.headers.begin();
while(headerIter != reply.headers.end()) {
evhttp_add_header(evhttp_request_get_output_headers(reply.curlReq), headerIter->first.c_str(), headerIter->second.c_str());
headerIter++;
}
if (!boost::iequals(reply.type, "HEAD"))
evbuffer_add(evb, reply.content.data(), reply.content.size());
evhttp_send_reply(reply.curlReq, reply.status, NULL, evb);
evbuffer_free(evb);
// evhttp_request_free(reply.curlReq);
}
bool HTTPServer::registerServlet(const std::string& path, HTTPServlet* servlet) {
HTTPServer* INSTANCE = getInstance();
tthread::lock_guard<tthread::recursive_mutex> lock(INSTANCE->_mutex);
/**
* Determine path for interpreter.
*
* If the interpreter has a name and it is not yet taken, choose it as the path
* for requests. If the interpreters name path is already taken, append digits
* until we have an available path.
*
* If the interpreter does not specify a name, take its sessionid.
*
* Responsibility moved to individual servlets.
*/
if(INSTANCE->_servlets.find(path) != INSTANCE->_servlets.end()) {
return false;
}
std::stringstream servletURL;
servletURL << "http://" << INSTANCE->_address << ":" << INSTANCE->_port << "/" << path;
servlet->setURL(servletURL.str());
INSTANCE->_servlets[path] = servlet;
LOG(INFO) << "HTTP Servlet listening at: " << servletURL.str() << std::endl;
// register callback
evhttp_set_cb(INSTANCE->_http, ("/" + path).c_str(), HTTPServer::httpRecvReqCallback, servlet);
return true;
// generic callback
// evhttp_set_cb(THIS->_http, "/", EventIOProcessor::httpRecvReq, processor);
// evhttp_set_gencb(THIS->_http, EventIOProcessor::httpRecvReq, NULL);
}
void HTTPServer::unregisterServlet(HTTPServlet* servlet) {
HTTPServer* INSTANCE = getInstance();
tthread::lock_guard<tthread::recursive_mutex> lock(INSTANCE->_mutex);
servlet_iter_t servletIter = INSTANCE->_servlets.begin();
while(servletIter != INSTANCE->_servlets.end()) {
if (servletIter->second == servlet) {
evhttp_del_cb(INSTANCE->_http, std::string("/" + servletIter->first).c_str());
INSTANCE->_servlets.erase(servletIter);
break;
}
servletIter++;
}
}
void HTTPServer::start() {
_isRunning = true;
_thread = new tthread::thread(HTTPServer::run, this);
}
void HTTPServer::run(void* instance) {
HTTPServer* INSTANCE = (HTTPServer*)instance;
while(INSTANCE->_isRunning) {
event_base_dispatch(INSTANCE->_base);
}
LOG(INFO) << "HTTP Server stopped" << std::endl;
}
void HTTPServer::determineAddress() {
char hostname[1024];
gethostname(hostname, 1024);
_address = std::string(hostname);
}
}
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