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#include "http_connection.h"
#include <iostream>
#include <algorithm>
#include <boost/bind.hpp>
#include <boost/format.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/scoped_array.hpp>
#include <boost/filesystem/fstream.hpp>
namespace response_map_init {
typedef std::pair<int, std::string> P;
const P m[] = {
P(200, "OK"),
P(206, "Partial Content"),
P(400, "Bad Request"),
P(403, "Forbidden"),
P(404, "Not Found"),
P(416, "Requested Range Not Satisfiable"),
P(500, "Internal Server Error"),
P(501, "Not Implemented")
};
const P* begin = m;
const P* end = m + sizeof(m) / sizeof(P);
}
const std::map<int, std::string> response_map(response_map_init::begin, response_map_init::end);
void HTTP::Connection::send_error(int code) {
boost::asio::write(socket, boost::asio::buffer(boost::str(boost::format("HTTP/1.1 %1$d %2$s\r\n\r\n<h1>%1$d %2$s</h1>") % code % response_map.find(code)->second)));
}
void HTTP::Connection::add_header(std::string key, std::string value) {
response_headers.push_back(std::make_pair(key, value));
}
void HTTP::Connection::send_data(const std::string& data) {
write_headers();
boost::asio::write(socket, boost::asio::buffer(data));
}
void HTTP::Connection::send_data(const void* data, std::size_t size) {
write_headers();
boost::asio::write(socket, boost::asio::buffer(data, size));
}
void HTTP::Connection::send_data(std::istream& stream) {
char data[0x1000];
std::streamsize size = 1;
while(size) {
stream.read(data, 0x1000);
size = stream.gcount();
if(size > 0)
send_data(data, size);
}
}
void HTTP::Connection::send_file(const fs::path& filename) {
//req->add_header("Content-Type", "application/octet-stream");
fs::ifstream is(filename, std::ios::in | std::ios::binary);
is.seekg(0, std::ios::end);
std::size_t length = is.tellg();
is.seekg(0, std::ios::beg);
// Simple Range-parser.
// TODO: Support other formats than a single range.
if(headers.count("Range")) {
std::string range_str = headers["Range"];
if(!boost::starts_with(range_str, "bytes=")) {
// Broken header? We can't cope with that.
return;
}
range_str = range_str.substr(6);
std::string::iterator it = std::find(range_str.begin(), range_str.end(), '-');
std::size_t begin = boost::lexical_cast<int>(std::string(range_str.begin(), it));
std::size_t end = length;
if(++it != range_str.end()) {
end = boost::lexical_cast<int>(std::string(it, range_str.end()));
}
// Is the range past the end of the file?
if(end > length) {
end = length;
}
// Do the file contain requested range?
if((end && end < begin) || begin > length) {
send_error(416);
}
add_header("Content-Range", boost::str(boost::format("bytes %d-%d/%d") % begin % (end - 1) % length));
add_header("Content-Length", boost::str(boost::format("%d") % (end - begin)));
write_headers(206);
is.seekg(begin);
boost::scoped_array<char> buf(new char[end-begin]);
is.read(buf.get(), end - begin);
send_data(buf.get(), is.gcount());
} else {
add_header("Content-Length", boost::str(boost::format("%d") % length));
send_data(is);
}
}
HTTP::Connection::Connection(boost::asio::io_service& io_service) : socket(io_service) {
headers_written = false;
}
void HTTP::Connection::handle_write(const boost::system::error_code& error, size_t bytes_transferred) {
}
void HTTP::Connection::handle_read(const boost::system::error_code& error, size_t bytes_transferred, Handler callback) {
try {
if(!parse_request(buf)) {
// Request parse error.
std::cout << "Request parse error." << std::endl;
send_error(400);
return;
}
std::cout << "Path: " << std::endl;
for(PathList::iterator it = path.begin(); it != path.end(); it++) {
std::cout << " " << *it << std::endl;
}
std::cout << "Args: " << std::endl;
for(std::map<std::string, std::string>::iterator it = args.begin(); it != args.end(); it++) {
std::cout << " " << it->first << " = " << it->second << std::endl;
}
std::cout << "Headers: " << std::endl;
for(std::map<std::string, std::string>::iterator it = headers.begin(); it != headers.end(); it++) {
std::cout << " " << it->first << " = " << it->second << std::endl;
}
callback(shared_from_this());
// Catch unhandled exceptions.
} catch(std::exception& e) {
std::cerr << "Unhandled exception while handling request: " << e.what() << std::endl;
try {
send_error(500);
} catch(...) {
// Ignored.
}
}
}
void HTTP::Connection::read_request(Handler callback) {
boost::asio::async_read_until(socket, buf, "\r\n\r\n", boost::bind(&Connection::handle_read, shared_from_this(),
boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred, callback));
}
std::string HTTP::Connection::pop_path_base() {
if(!path.size()) {
return "";
}
base_path.push_back(path.front());
path.pop_front();
return base_path.back();
}
void HTTP::Connection::write_headers(int code) {
if(headers_written) {
return;
}
headers_written = true;
boost::asio::write(socket, boost::asio::buffer(boost::str(boost::format("HTTP/1.1 %d %s\r\n") % code % response_map.find(code)->second)));
for(HeaderList::iterator it = response_headers.begin(); it != response_headers.end(); it++) {
boost::asio::write(socket, boost::asio::buffer(boost::str(boost::format("%s: %s\r\n") % it->first % it->second)));
}
boost::asio::write(socket, boost::asio::buffer(std::string("\r\n")));
}
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