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//
// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
// Copyright (c) 2025 Mohammad Nejati
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/beast
//
//------------------------------------------------------------------------------
//
// Example: HTTP client, asynchronous Unix domain sockets
//
//------------------------------------------------------------------------------
#include <boost/asio/local/stream_protocol.hpp>
#include <boost/beast/core.hpp>
#include <boost/beast/http.hpp>
#include <boost/beast/version.hpp>
#include <cstdlib>
#include <iostream>
#include <memory>
#include <string>
#if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
namespace beast = boost::beast; // from <boost/beast.hpp>
namespace http = beast::http; // from <boost/beast/http.hpp>
namespace net = boost::asio; // from <boost/asio.hpp>
using stream_protocol = net::local::stream_protocol; // from <boost/asio/local/stream_protocol.hpp>
//------------------------------------------------------------------------------
// Report a failure
void
fail(beast::error_code ec, char const* what)
{
std::cerr << what << ": " << ec.message() << "\n";
}
// Performs an HTTP GET and prints the response
class session : public std::enable_shared_from_this<session>
{
beast::basic_stream<
stream_protocol,
net::any_io_executor,
beast::unlimited_rate_policy> stream_;
beast::flat_buffer buffer_; // (Must persist between reads)
http::request<http::empty_body> req_;
http::response<http::string_body> res_;
public:
// Objects are constructed with a strand to
// ensure that handlers do not execute concurrently.
explicit
session(net::io_context& ioc)
: stream_(ioc)
{
}
// Start the asynchronous operation
void
run(
char const* path,
char const* host,
char const* port,
char const* target,
int version)
{
// Set up an HTTP GET request message
req_.version(version);
req_.method(http::verb::get);
req_.target(target);
req_.set(http::field::host, std::string{host} + ":" + port);
req_.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
// Make the connection on the IP address we get from a lookup
stream_.async_connect(
stream_protocol::endpoint{path},
beast::bind_front_handler(
&session::on_connect,
shared_from_this()));
}
void
on_connect(beast::error_code ec)
{
if(ec)
return fail(ec, "connect");
// Set a timeout on the operation
stream_.expires_after(std::chrono::seconds(30));
// Send the HTTP request to the remote host
http::async_write(stream_, req_,
beast::bind_front_handler(
&session::on_write,
shared_from_this()));
}
void
on_write(
beast::error_code ec,
std::size_t bytes_transferred)
{
boost::ignore_unused(bytes_transferred);
if(ec)
return fail(ec, "write");
// Receive the HTTP response
http::async_read(stream_, buffer_, res_,
beast::bind_front_handler(
&session::on_read,
shared_from_this()));
}
void
on_read(
beast::error_code ec,
std::size_t bytes_transferred)
{
boost::ignore_unused(bytes_transferred);
if(ec)
return fail(ec, "read");
// Write the message to standard out
std::cout << res_ << std::endl;
// Gracefully close the socket
stream_.socket().shutdown(stream_protocol::socket::shutdown_both, ec);
// not_connected happens sometimes so don't bother reporting it.
if(ec && ec != beast::errc::not_connected)
return fail(ec, "shutdown");
// If we get here then the connection is closed gracefully
}
};
//------------------------------------------------------------------------------
int main(int argc, char** argv)
{
// Check command line arguments.
if(argc != 5 && argc != 6)
{
std::cerr <<
"Usage: http-client-async-local <path> <host> <port> <target> [<HTTP version: 1.0 or 1.1(default)>]\n" <<
"Example:\n" <<
" http-client-async-local /tmp/http.sock localhost 80 /\n" <<
" http-client-async-local /tmp/http.sock localhost 80 / 1.0\n";
return EXIT_FAILURE;
}
auto const path = argv[1];
auto const host = argv[2];
auto const port = argv[3];
auto const target = argv[4];
int version = argc == 6 && !std::strcmp("1.0", argv[5]) ? 10 : 11;
// The io_context is required for all I/O
net::io_context ioc;
// Launch the asynchronous operation
std::make_shared<session>(ioc)->run(path, host, port, target, version);
// Run the I/O service. The call will return when
// the get operation is complete.
ioc.run();
return EXIT_SUCCESS;
}
#else
int
main(int, char*[])
{
std::cerr <<
"Local sockets not available on this platform" << std::endl;
return EXIT_FAILURE;
}
#endif
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