367 lines
No EOL
15 KiB
C++
367 lines
No EOL
15 KiB
C++
#ifndef SERVER_HTTP_HPP
|
|
#define SERVER_HTTP_HPP
|
|
|
|
#include <boost/asio.hpp>
|
|
#include <boost/asio/spawn.hpp>
|
|
|
|
#include <regex>
|
|
#include <unordered_map>
|
|
#include <thread>
|
|
#include <functional>
|
|
|
|
namespace SimpleWeb {
|
|
template <class socket_type>
|
|
class ServerBase {
|
|
public:
|
|
class Response {
|
|
friend class ServerBase<socket_type>;
|
|
private:
|
|
std::shared_ptr<boost::asio::strand> strand;
|
|
|
|
boost::asio::yield_context& yield;
|
|
|
|
boost::asio::streambuf streambuf;
|
|
|
|
std::shared_ptr<socket_type> socket;
|
|
|
|
std::shared_ptr<boost::asio::deadline_timer> async_timer;
|
|
|
|
std::shared_ptr<bool> async_writing;
|
|
std::shared_ptr<bool> async_waiting;
|
|
|
|
Response(boost::asio::io_service& io_service, std::shared_ptr<socket_type> socket, std::shared_ptr<boost::asio::strand> strand,
|
|
boost::asio::yield_context& yield):
|
|
strand(strand), yield(yield), socket(socket), async_timer(new boost::asio::deadline_timer(io_service)),
|
|
async_writing(new bool(false)), async_waiting(new bool(false)), stream(&streambuf) {}
|
|
|
|
void async_flush(std::function<void((const boost::system::error_code&))> callback=nullptr) {
|
|
if(!callback && !socket->lowest_layer().is_open()) {
|
|
if(*async_waiting)
|
|
async_timer->cancel();
|
|
throw std::runtime_error("Broken pipe.");
|
|
}
|
|
|
|
std::shared_ptr<boost::asio::streambuf> write_buffer(new boost::asio::streambuf);
|
|
std::ostream response(write_buffer.get());
|
|
response << stream.rdbuf();
|
|
|
|
//Wait until previous async_flush is finished
|
|
strand->dispatch([this](){
|
|
if(*async_writing) {
|
|
*async_waiting=true;
|
|
try {
|
|
async_timer->async_wait(yield);
|
|
}
|
|
catch(std::exception& e) {
|
|
}
|
|
*async_waiting=false;
|
|
}
|
|
});
|
|
|
|
*async_writing=true;
|
|
|
|
auto socket_=this->socket;
|
|
auto async_writing_=this->async_writing;
|
|
auto async_timer_=this->async_timer;
|
|
auto async_waiting_=this->async_waiting;
|
|
|
|
boost::asio::async_write(*socket, *write_buffer,
|
|
strand->wrap([socket_, write_buffer, callback, async_writing_, async_timer_, async_waiting_]
|
|
(const boost::system::error_code& ec, size_t bytes_transferred) {
|
|
*async_writing_=false;
|
|
if(*async_waiting_)
|
|
async_timer_->cancel();
|
|
if(callback)
|
|
callback(ec);
|
|
}));
|
|
}
|
|
|
|
void flush() {
|
|
boost::asio::streambuf write_buffer;
|
|
std::ostream response(&write_buffer);
|
|
response << stream.rdbuf();
|
|
|
|
boost::asio::async_write(*socket, write_buffer, yield);
|
|
}
|
|
|
|
public:
|
|
std::ostream stream;
|
|
|
|
template <class T>
|
|
Response& operator<<(const T& t) {
|
|
stream << t;
|
|
return *this;
|
|
}
|
|
|
|
Response& operator<<(std::ostream& (*manip)(std::ostream&)) {
|
|
stream << manip;
|
|
return *this;
|
|
}
|
|
|
|
Response& operator<<(Response& (*manip)(Response&)) {
|
|
return manip(*this);
|
|
}
|
|
};
|
|
|
|
static Response& async_flush(Response& r) {
|
|
r.async_flush();
|
|
return r;
|
|
}
|
|
|
|
static Response& flush(Response& r) {
|
|
r.flush();
|
|
return r;
|
|
}
|
|
|
|
class Request {
|
|
friend class ServerBase<socket_type>;
|
|
public:
|
|
std::string method, path, http_version;
|
|
|
|
std::istream content;
|
|
|
|
std::unordered_map<std::string, std::string> header;
|
|
|
|
std::smatch path_match;
|
|
|
|
private:
|
|
Request(): content(&streambuf) {}
|
|
|
|
boost::asio::streambuf streambuf;
|
|
};
|
|
|
|
std::unordered_map<std::string, std::unordered_map<std::string,
|
|
std::function<void(ServerBase<socket_type>::Response&, std::shared_ptr<ServerBase<socket_type>::Request>)> > > resource;
|
|
|
|
std::unordered_map<std::string,
|
|
std::function<void(ServerBase<socket_type>::Response&, std::shared_ptr<ServerBase<socket_type>::Request>)> > default_resource;
|
|
|
|
private:
|
|
std::vector<std::pair<std::regex, std::unordered_map<std::string,
|
|
std::function<void(ServerBase<socket_type>::Response&, std::shared_ptr<ServerBase<socket_type>::Request>)> > > > regex_resource;
|
|
|
|
public:
|
|
void start() {
|
|
//Move the resources with regular expressions to regex_resource for more efficient request processing
|
|
for(auto it=resource.begin();it!=resource.end();) {
|
|
regex_resource.emplace_back(std::regex(it->first), std::move(it->second));
|
|
it=resource.erase(it);
|
|
}
|
|
|
|
accept();
|
|
|
|
//If num_threads>1, start m_io_service.run() in (num_threads-1) threads for thread-pooling
|
|
threads.clear();
|
|
for(size_t c=1;c<num_threads;c++) {
|
|
threads.emplace_back([this](){
|
|
io_service.run();
|
|
});
|
|
}
|
|
|
|
//Main thread
|
|
io_service.run();
|
|
|
|
//Wait for the rest of the threads, if any, to finish as well
|
|
for(auto& t: threads) {
|
|
t.join();
|
|
}
|
|
}
|
|
|
|
void stop() {
|
|
io_service.stop();
|
|
}
|
|
|
|
protected:
|
|
boost::asio::io_service io_service;
|
|
boost::asio::ip::tcp::endpoint endpoint;
|
|
boost::asio::ip::tcp::acceptor acceptor;
|
|
size_t num_threads;
|
|
std::vector<std::thread> threads;
|
|
|
|
size_t timeout_request;
|
|
size_t timeout_content;
|
|
|
|
ServerBase(unsigned short port, size_t num_threads, size_t timeout_request, size_t timeout_send_or_receive) :
|
|
endpoint(boost::asio::ip::tcp::v4(), port), acceptor(io_service, endpoint), num_threads(num_threads),
|
|
timeout_request(timeout_request), timeout_content(timeout_send_or_receive) {}
|
|
|
|
virtual void accept()=0;
|
|
|
|
std::shared_ptr<boost::asio::deadline_timer> set_timeout_on_socket(std::shared_ptr<socket_type> socket, size_t seconds) {
|
|
std::shared_ptr<boost::asio::deadline_timer> timer(new boost::asio::deadline_timer(io_service));
|
|
timer->expires_from_now(boost::posix_time::seconds(seconds));
|
|
timer->async_wait([socket](const boost::system::error_code& ec){
|
|
if(!ec) {
|
|
boost::system::error_code ec;
|
|
socket->lowest_layer().shutdown(boost::asio::ip::tcp::socket::shutdown_both, ec);
|
|
socket->lowest_layer().close();
|
|
}
|
|
});
|
|
return timer;
|
|
}
|
|
|
|
std::shared_ptr<boost::asio::deadline_timer> set_timeout_on_socket(std::shared_ptr<socket_type> socket, std::shared_ptr<boost::asio::strand> strand, size_t seconds) {
|
|
std::shared_ptr<boost::asio::deadline_timer> timer(new boost::asio::deadline_timer(io_service));
|
|
timer->expires_from_now(boost::posix_time::seconds(seconds));
|
|
timer->async_wait(strand->wrap([socket](const boost::system::error_code& ec){
|
|
if(!ec) {
|
|
boost::system::error_code ec;
|
|
socket->lowest_layer().shutdown(boost::asio::ip::tcp::socket::shutdown_both, ec);
|
|
socket->lowest_layer().close();
|
|
}
|
|
}));
|
|
return timer;
|
|
}
|
|
|
|
void read_request_and_content(std::shared_ptr<socket_type> socket) {
|
|
//Create new streambuf (Request::streambuf) for async_read_until()
|
|
//shared_ptr is used to pass temporary objects to the asynchronous functions
|
|
std::shared_ptr<Request> request(new Request());
|
|
|
|
//Set timeout on the following boost::asio::async-read or write function
|
|
std::shared_ptr<boost::asio::deadline_timer> timer;
|
|
if(timeout_request>0)
|
|
timer=set_timeout_on_socket(socket, timeout_request);
|
|
|
|
boost::asio::async_read_until(*socket, request->streambuf, "\r\n\r\n",
|
|
[this, socket, request, timer](const boost::system::error_code& ec, size_t bytes_transferred) {
|
|
if(timeout_request>0)
|
|
timer->cancel();
|
|
if(!ec) {
|
|
//request->streambuf.size() is not necessarily the same as bytes_transferred, from Boost-docs:
|
|
//"After a successful async_read_until operation, the streambuf may contain additional data beyond the delimiter"
|
|
//The chosen solution is to extract lines from the stream directly when parsing the header. What is left of the
|
|
//streambuf (maybe some bytes of the content) is appended to in the async_read-function below (for retrieving content).
|
|
size_t num_additional_bytes=request->streambuf.size()-bytes_transferred;
|
|
|
|
parse_request(request, request->content);
|
|
|
|
//If content, read that as well
|
|
if(request->header.count("Content-Length")>0) {
|
|
//Set timeout on the following boost::asio::async-read or write function
|
|
std::shared_ptr<boost::asio::deadline_timer> timer;
|
|
if(timeout_content>0)
|
|
timer=set_timeout_on_socket(socket, timeout_content);
|
|
|
|
boost::asio::async_read(*socket, request->streambuf,
|
|
boost::asio::transfer_exactly(stoull(request->header["Content-Length"])-num_additional_bytes),
|
|
[this, socket, request, timer]
|
|
(const boost::system::error_code& ec, size_t bytes_transferred) {
|
|
if(timeout_content>0)
|
|
timer->cancel();
|
|
if(!ec)
|
|
find_resource(socket, request);
|
|
});
|
|
}
|
|
else {
|
|
find_resource(socket, request);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
void parse_request(std::shared_ptr<Request> request, std::istream& stream) const {
|
|
std::string line;
|
|
getline(stream, line);
|
|
size_t method_end=line.find(' ');
|
|
size_t path_end=line.find(' ', method_end+1);
|
|
if(method_end!=std::string::npos && path_end!=std::string::npos) {
|
|
request->method=line.substr(0, method_end);
|
|
request->path=line.substr(method_end+1, path_end-method_end-1);
|
|
request->http_version=line.substr(path_end+6, line.size()-path_end-7);
|
|
|
|
getline(stream, line);
|
|
size_t param_end=line.find(':');
|
|
while(param_end!=std::string::npos) {
|
|
size_t value_start=param_end+1;
|
|
if(line[value_start]==' ')
|
|
value_start++;
|
|
|
|
request->header[line.substr(0, param_end)]=line.substr(value_start, line.size()-value_start-1);
|
|
|
|
getline(stream, line);
|
|
param_end=line.find(':');
|
|
}
|
|
}
|
|
}
|
|
|
|
void find_resource(std::shared_ptr<socket_type> socket, std::shared_ptr<Request> request) {
|
|
//Find path- and method-match, and call write_response
|
|
for(auto& res: regex_resource) {
|
|
auto it_method=res.second.find(request->method);
|
|
if(it_method!=res.second.end()) {
|
|
std::smatch sm_res;
|
|
if(std::regex_match(request->path, sm_res, res.first)) {
|
|
request->path_match=std::move(sm_res);
|
|
write_response(socket, request, it_method->second);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
auto it_method=default_resource.find(request->method);
|
|
if(it_method!=default_resource.end()) {
|
|
write_response(socket, request, it_method->second);
|
|
}
|
|
}
|
|
|
|
void write_response(std::shared_ptr<socket_type> socket, std::shared_ptr<Request> request,
|
|
std::function<void(ServerBase<socket_type>::Response&, std::shared_ptr<ServerBase<socket_type>::Request>)>& resource_function) {
|
|
std::shared_ptr<boost::asio::strand> strand(new boost::asio::strand(io_service));
|
|
|
|
//Set timeout on the following boost::asio::async-read or write function
|
|
std::shared_ptr<boost::asio::deadline_timer> timer;
|
|
if(timeout_content>0)
|
|
timer=set_timeout_on_socket(socket, strand, timeout_content);
|
|
|
|
boost::asio::spawn(*strand, [this, strand, &resource_function, socket, request, timer](boost::asio::yield_context yield) {
|
|
Response response(io_service, socket, strand, yield);
|
|
|
|
try {
|
|
resource_function(response, request);
|
|
}
|
|
catch(std::exception& e) {
|
|
return;
|
|
}
|
|
|
|
response.async_flush([this, socket, request, timer](const boost::system::error_code& ec) {
|
|
if(timeout_content>0)
|
|
timer->cancel();
|
|
if(!ec && stof(request->http_version)>1.05)
|
|
read_request_and_content(socket);
|
|
});
|
|
});
|
|
}
|
|
};
|
|
|
|
template<class socket_type>
|
|
class Server : public ServerBase<socket_type> {};
|
|
|
|
typedef boost::asio::ip::tcp::socket HTTP;
|
|
|
|
template<>
|
|
class Server<HTTP> : public ServerBase<HTTP> {
|
|
public:
|
|
Server(unsigned short port, size_t num_threads=1, size_t timeout_request=5, size_t timeout_content=300) :
|
|
ServerBase<HTTP>::ServerBase(port, num_threads, timeout_request, timeout_content) {};
|
|
|
|
private:
|
|
void accept() {
|
|
//Create new socket for this connection
|
|
//Shared_ptr is used to pass temporary objects to the asynchronous functions
|
|
std::shared_ptr<HTTP> socket(new HTTP(io_service));
|
|
|
|
acceptor.async_accept(*socket, [this, socket](const boost::system::error_code& ec){
|
|
//Immediately start accepting a new connection
|
|
accept();
|
|
|
|
if(!ec) {
|
|
boost::asio::ip::tcp::no_delay option(true);
|
|
socket->set_option(option);
|
|
|
|
read_request_and_content(socket);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
}
|
|
#endif /* SERVER_HTTP_HPP */ |