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Copy pathhttpserver.hpp
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337 lines (287 loc) · 11 KB
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Copy pathhttpserver.hpp
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337 lines (287 loc) · 11 KB
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#ifndef HTTPSERVER_H
#define HTTPSERVER_H
#include <string>
#include <boost/function.hpp>
#include <boost/asio.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/algorithm/string.hpp>
#include <thread>
#include <unordered_map>
#include <vector>
#include <iostream>
#include <sstream>
#include <memory>
#include <fstream>
#include <regex>
#define LOG() std::cout << __FILE__ << ":" << __LINE__ << std::endl
namespace httpserver{
class Request;
class Response;
class Connection;
class HttpServer;
enum HttpStatus{OK, NOT_FOUND};
typedef std::unordered_map<std::string, boost::function<bool (Request&, Response&, Connection&)> > res_type;
class HttpStatusUtil{
public:
static const std::string get_status_line(HttpStatus status){
switch (status) {
case NOT_FOUND:
return "404 Not Found";
default: // default to ok
return "200 OK";
}
}
};
class Request
{
friend class Connection;
private:
boost::asio::streambuf streambuf_;
public:
std::string content;
std::unordered_map<std::string, std::string> headers;
std::string method;
std::string path;
std::string http_version;
std::smatch base_match;
void parse_headers(){
std::string line;
std::istream is(&streambuf_);
// parse status line
std::getline(is, line);
std::vector<std::string> split_container;
boost::split(split_container, line, boost::is_any_of(" \r\n"), boost::token_compress_on);
method = split_container[0];
path = split_container[1];
http_version = split_container[2];
while(true){
std::getline(is, line);
size_t index = line.find(':');
if(index == std::string::npos)
break;
std::string key = line.substr(0, index);
std::string value = line.substr(index+1);
boost::trim(key);
boost::trim(value);
//std::cout << key << ": " << value << std::endl;
headers[key] = value;
}
}
};
class Response
{
friend class Connection;
private:
boost::asio::streambuf streambuf_;
bool headers_filled_;
bool key_exists(std::string key){
auto iter = headers.find(key);
return !(iter == headers.end());
}
public:
std::string content;
std::unordered_map<std::string, std::string> headers;
HttpStatus status;
void fill_headers_and_content(){
std::ostream os(&streambuf_);
if(headers_filled_ == false){
if(!key_exists("Content-Length")){
try{
headers["Content-Length"] = boost::lexical_cast<std::string>(content.size());
} catch(const std::exception &e){
headers["Content-Length"] = "0";
}
}
if(!key_exists("Content-type")){
headers["Content-Type"] = "text/plain";
}
os << "HTTP/1.1 " << HttpStatusUtil::get_status_line(status) << "\r\n";
for(auto p : headers){
os << p.first << ": " << p.second << "\r\n";
}
os << "\r\n";
headers_filled_ = true;
}
os << content;
}
Response(): headers_filled_(false){}
};
class Connection : public boost::enable_shared_from_this<Connection> {
private:
boost::shared_ptr<boost::asio::ip::tcp::socket> socket_;
Request request_;
Response response_;
void process_request(const res_type &resources){
bool need_write = true;
for(const auto &i : resources){
std::regex reg(i.first);
std::smatch match;
if(std::regex_match(request_.path, match, reg)){
request_.base_match = match;
need_write = i.second(request_, response_, *this);
if(need_write)
do_write();
return;
}
}
response_.status = NOT_FOUND;
response_.content = "Page Not Found";
std::cout << "404 request: " << request_.path << std::endl;
do_write();
}
void handler_read_request(const boost::system::error_code& e,
std::size_t size,
res_type &resources){
if(e){
std::cerr << __FUNCTION__ << ": " << e.message() << std::endl;
return;
}
request_.parse_headers();
std::cout << "Got Request: " << request_.method << " "
<< request_.path << " "
<< request_.http_version << std::endl;
size_t bytes_remain = request_.streambuf_.size() - size;
auto iter = request_.headers.find("Content-Length");
if(iter != request_.headers.end()){ // content-length found
unsigned long long content_length;
try {
content_length = stoull(iter->second);
}
catch(const std::exception &e) {
std::cerr << "parse content-length failed: " << iter->second << std::endl;
return;
}
if(content_length > bytes_remain) {
boost::asio::async_read(*socket_, request_.streambuf_,
boost::asio::transfer_exactly(content_length - bytes_remain),
[this, resources]
(const boost::system::error_code& ec, size_t) {
if(ec)
std::cerr << __FUNCTION__ << ec.message() << std::endl;
else{
process_request(resources);
}
});
}
} else{
process_request(resources);
}
}
void handler_write_response(const boost::system::error_code &e, std::size_t size){
if(e){
std::cerr << __FUNCTION__ << e.message() << std::endl;
return;
} else{
//std::cout << "write finished with " << size << "bytes" << std::endl;
}
}
public:
explicit Connection(boost::shared_ptr<boost::asio::ip::tcp::socket> socket):socket_(socket){}
// read from socket, fill into @request_
void do_read(res_type &resources){
boost::asio::async_read_until(*socket_,
request_.streambuf_,
"\r\n\r\n",
std::bind(&Connection::handler_read_request,
shared_from_this(),
std::placeholders::_1,
std::placeholders::_2,
resources));
}
// write headers and content of response to socket in HTTP format
void do_write(){
response_.fill_headers_and_content();
boost::asio::async_write(*socket_,
response_.streambuf_,
std::bind(&Connection::handler_write_response,
shared_from_this(),
std::placeholders::_1,
std::placeholders::_2));
}
void write_staticfile(std::string file_path, std::string filename){
std::ifstream ifs(file_path, std::ifstream::binary);
std::stringstream os;
if(!ifs.good()){
boost::asio::write(*socket_, boost::asio::buffer("HTTP/1.1 200 OK\r\nfile not found"));
return;
}
// get length of file:
ifs.seekg(0, ifs.end);
size_t length = ifs.tellg();
ifs.seekg(0, ifs.beg);
os << "HTTP/1.1 200 OK\r\nContent-Type: application/octet-stream\r\n";
os << "Content-Length: " << length << "\r\n";
os << "Content-Disposition: attachment; filename=" << filename << "\r\n\r\n";
boost::asio::write(*socket_, boost::asio::buffer(os.str()));
while(!ifs.eof()){
std::string str;
size_t transfer_length = length>4096?4096:length;
str.resize(transfer_length, ' '); // reserve space
char* begin = &*str.begin();
ifs.read(begin, transfer_length);
length -= transfer_length;
boost::asio::write(*socket_, boost::asio::buffer(str));
if(length == 0)
break;
}
ifs.close();
}
~Connection(){
}
};
class HttpServer
{
private:
int port_;
size_t thread_num_;
boost::asio::io_service io_service_;
boost::asio::ip::tcp::acceptor acceptor_;
std::vector<std::thread> threads_;
res_type resources;
void handle_accept(boost::shared_ptr<boost::asio::ip::tcp::socket> socket, const boost::system::error_code &err){
accept();
if(!err){
boost::asio::ip::tcp::endpoint remote_endpoint = socket->remote_endpoint();
//std::cout << "new connection from: " << remote_endpoint.address() << ":" << remote_endpoint.port() << std::endl;
boost::shared_ptr<Connection> connection(new Connection(socket));
connection->do_read(resources);
} else{
std::cerr << err.message() << std::endl;
}
}
void accept(){
boost::shared_ptr<boost::asio::ip::tcp::socket> socket(new boost::asio::ip::tcp::socket(io_service_));
acceptor_.async_accept(*socket, std::bind(&HttpServer::handle_accept, this, socket, std::placeholders::_1));
}
public:
HttpServer(int port, size_t thread_num) : port_(port),
thread_num_(thread_num),
acceptor_(io_service_){
}
virtual ~HttpServer(){}
// callback function return false to ask httpserver not send response
void add_resource(std::string url, boost::function<bool (Request&, Response&, Connection&)> fun){
resources[url] = fun;
}
void start(){
if(io_service_.stopped())
io_service_.reset();
boost::asio::ip::tcp::endpoint endpoint=boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), port_);
acceptor_.open(endpoint.protocol());
acceptor_.set_option(boost::asio::socket_base::reuse_address(true));
acceptor_.bind(endpoint);
acceptor_.listen();
accept();
threads_.clear();
for(size_t i=1; i<thread_num_; ++i){
threads_.push_back(std::thread([this](){
io_service_.run();
}));
}
io_service_.run();
}
};
}
#endif
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