forked from boostorg/beast
b0e52dd246
fix #581 * request and response headers now have convenience constructors so important fields like method, target, result, and version may be set upon construction. Actions Required: * Evaluate each message constructor call site and adjust the constructor argument list as needed.
90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
//
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// Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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//[example_http_client
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#include <beast/core.hpp>
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#include <beast/http.hpp>
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#include <beast/version.hpp>
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#include <boost/asio.hpp>
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#include <cstdlib>
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#include <iostream>
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#include <string>
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using tcp = boost::asio::ip::tcp; // from <boost/asio.hpp>
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namespace http = beast::http; // from <beast/http.hpp>
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int main()
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{
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// A helper for reporting errors
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auto const fail =
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[](std::string what, beast::error_code ec)
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{
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std::cerr << what << ": " << ec.message() << std::endl;
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std::cerr.flush();
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return EXIT_FAILURE;
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};
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beast::error_code ec;
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// Set up an asio socket
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boost::asio::io_service ios;
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tcp::resolver r{ios};
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tcp::socket sock{ios};
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// Look up the domain name
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std::string const host = "www.example.com";
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auto const lookup = r.resolve({host, "http"}, ec);
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if(ec)
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return fail("resolve", ec);
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// Make the connection on the IP address we get from a lookup
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boost::asio::connect(sock, lookup, ec);
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if(ec)
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return fail("connect", ec);
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// Set up an HTTP GET request message
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http::request<http::string_body> req{http::verb::get, "/", 11};
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req.set(http::field::host, host + ":" +
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std::to_string(sock.remote_endpoint().port()));
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req.set(http::field::user_agent, BEAST_VERSION_STRING);
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req.prepare_payload();
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// Write the HTTP request to the remote host
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http::write(sock, req, ec);
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if(ec)
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return fail("write", ec);
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// This buffer is used for reading and must be persisted
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beast::flat_buffer b;
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// Declare a container to hold the response
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http::response<http::dynamic_body> res;
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// Read the response
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http::read(sock, b, res, ec);
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if(ec)
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return fail("read", ec);
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// Write the message to standard out
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std::cout << res << std::endl;
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// Gracefully close the socket
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sock.shutdown(tcp::socket::shutdown_both, ec);
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// not_connected happens sometimes
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// so don't bother reporting it.
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//
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if(ec && ec != beast::errc::not_connected)
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return fail("shutdown", ec);
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// If we get here then the connection is closed gracefully
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return EXIT_SUCCESS;
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}
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//]
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