#include <iostream>
#include <istream>
#include <ostream>
#include <string>
#include <asio.hpp>
using asio::ip::tcp;
int main(int argc, char* argv[])
{
try
{
if (argc != 3)
{
std::cout << "Usage: sync_client <server> <path>\n";
std::cout << "Example:\n";
std::cout << " sync_client www.boost.org /LICENSE_1_0.txt\n";
return 1;
}
asio::io_service io_service;
tcp::resolver resolver(io_service);
tcp::resolver::query query(argv[1], "http");
tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
tcp::resolver::iterator end;
tcp::socket socket(io_service);
asio::error_code error = asio::error::host_not_found;
while (error && endpoint_iterator != end)
{
socket.close();
socket.connect(*endpoint_iterator++, error);
}
if (error)
throw asio::system_error(error);
asio::streambuf request;
std::ostream request_stream(&request);
request_stream << "GET " << argv[2] << " HTTP/1.0\r\n";
request_stream << "Host: " << argv[1] << "\r\n";
request_stream << "Accept: */*\r\n";
request_stream << "Connection: close\r\n\r\n";
asio::write(socket, request);
asio::streambuf response;
asio::read_until(socket, response, "\r\n");
std::istream response_stream(&response);
std::string http_version;
response_stream >> http_version;
unsigned int status_code;
response_stream >> status_code;
std::string status_message;
std::getline(response_stream, status_message);
if (!response_stream || http_version.substr(0, 5) != "HTTP/")
{
std::cout << "Invalid response\n";
return 1;
}
if (status_code != 200)
{
std::cout << "Response returned with status code " << status_code << "\n";
return 1;
}
asio::read_until(socket, response, "\r\n\r\n");
std::string header;
while (std::getline(response_stream, header) && header != "\r")
std::cout << header << "\n";
std::cout << "\n";
if (response.size() > 0)
std::cout << &response;
while (asio::read(socket, response,
asio::transfer_at_least(1), error))
std::cout << &response;
if (error != asio::error::eof)
throw asio::system_error(error);
}
catch (std::exception& e)
{
std::cout << "Exception: " << e.what() << "\n";
}
return 0;
}