forked from boostorg/beast
123 lines
4.2 KiB
C++
123 lines
4.2 KiB
C++
//
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// Copyright (c) 2016-2017 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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// Official repository: https://github.com/boostorg/beast
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//
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//------------------------------------------------------------------------------
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//
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// Example: HTTP SSL client, synchronous
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//
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//------------------------------------------------------------------------------
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#include "example/common/root_certificates.hpp"
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#include <boost/beast/core.hpp>
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#include <boost/beast/http.hpp>
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#include <boost/beast/version.hpp>
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#include <boost/asio/connect.hpp>
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#include <boost/asio/ip/tcp.hpp>
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#include <boost/asio/ssl/error.hpp>
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#include <boost/asio/ssl/stream.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/ip/tcp.hpp>
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namespace ssl = boost::asio::ssl; // from <boost/asio/ssl.hpp>
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namespace http = boost::beast::http; // from <boost/beast/http.hpp>
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// Performs an HTTP GET and prints the response
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int main(int argc, char** argv)
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{
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try
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{
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// Check command line arguments.
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if(argc != 4 && argc != 5)
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{
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std::cerr <<
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"Usage: http-client-sync-ssl <host> <port> <target> [<HTTP version: 1.0 or 1.1(default)>]\n" <<
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"Example:\n" <<
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" http-client-sync-ssl www.example.com 443 /\n" <<
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" http-client-sync-ssl www.example.com 443 / 1.0\n";
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return EXIT_FAILURE;
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}
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auto const host = argv[1];
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auto const port = argv[2];
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auto const target = argv[3];
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int version = argc == 5 && !std::strcmp("1.0", argv[4]) ? 10 : 11;
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// The io_context is required for all I/O
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boost::asio::io_context ioc;
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// The SSL context is required, and holds certificates
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ssl::context ctx{ssl::context::sslv23_client};
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// This holds the root certificate used for verification
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load_root_certificates(ctx);
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// These objects perform our I/O
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tcp::resolver resolver{ioc};
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ssl::stream<tcp::socket> stream{ioc, ctx};
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// Set SNI Hostname (many hosts need this to handshake successfully)
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if(! SSL_set_tlsext_host_name(stream.native_handle(), host))
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{
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boost::system::error_code ec{static_cast<int>(::ERR_get_error()), boost::asio::error::get_ssl_category()};
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throw boost::system::system_error{ec};
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}
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// Look up the domain name
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auto const results = resolver.resolve(host, port);
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// Make the connection on the IP address we get from a lookup
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boost::asio::connect(stream.next_layer(), results.begin(), results.end());
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// Perform the SSL handshake
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stream.handshake(ssl::stream_base::client);
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// Set up an HTTP GET request message
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http::request<http::string_body> req{http::verb::get, target, version};
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req.set(http::field::host, host);
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req.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
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// Send the HTTP request to the remote host
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http::write(stream, req);
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// This buffer is used for reading and must be persisted
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boost::beast::flat_buffer buffer;
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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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// Receive the HTTP response
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http::read(stream, buffer, res);
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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 stream
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boost::system::error_code ec;
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stream.shutdown(ec);
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if(ec == boost::asio::error::eof)
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{
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// Rationale:
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// http://stackoverflow.com/questions/25587403/boost-asio-ssl-async-shutdown-always-finishes-with-an-error
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ec.assign(0, ec.category());
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}
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if(ec)
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throw boost::system::system_error{ec};
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// If we get here then the connection is closed gracefully
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}
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catch(std::exception const& e)
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{
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std::cerr << "Error: " << e.what() << std::endl;
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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