mirror of
https://github.com/boostorg/beast.git
synced 2025-07-30 12:57:31 +02:00
awaitable examples are simplified
No need for `rebind_executor` as `asio::deferred` is now the default completion token.
This commit is contained in:
committed by
Mohammad Nejati
parent
aabd5b51d3
commit
ff5672ec07
File diff suppressed because it is too large
Load Diff
@ -13,28 +13,27 @@
|
|||||||
//
|
//
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
#include <boost/beast/core.hpp>
|
|
||||||
#include <boost/beast/http.hpp>
|
|
||||||
#include <boost/beast/version.hpp>
|
|
||||||
#include <boost/asio/as_tuple.hpp>
|
#include <boost/asio/as_tuple.hpp>
|
||||||
#include <boost/asio/awaitable.hpp>
|
#include <boost/asio/awaitable.hpp>
|
||||||
#include <boost/asio/co_spawn.hpp>
|
#include <boost/asio/co_spawn.hpp>
|
||||||
#include <boost/asio/detached.hpp>
|
#include <boost/asio/io_context.hpp>
|
||||||
#include <boost/asio/ssl.hpp>
|
#include <boost/asio/ssl.hpp>
|
||||||
#include <boost/asio/use_awaitable.hpp>
|
#include <boost/beast/core.hpp>
|
||||||
|
#include <boost/beast/http.hpp>
|
||||||
|
#include <boost/beast/version.hpp>
|
||||||
|
|
||||||
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
#include "example/common/root_certificates.hpp"
|
||||||
|
|
||||||
#include <cstdlib>
|
#include <cstdlib>
|
||||||
#include <iostream>
|
#include <iostream>
|
||||||
#include <string>
|
#include <string>
|
||||||
#include "example/common/root_certificates.hpp"
|
|
||||||
|
|
||||||
namespace beast = boost::beast; // from <boost/beast.hpp>
|
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
||||||
namespace http = beast::http; // from <boost/beast/http.hpp>
|
|
||||||
namespace net = boost::asio; // from <boost/asio.hpp>
|
namespace beast = boost::beast;
|
||||||
namespace ssl = boost::asio::ssl; // from <boost/asio/ssl.hpp>
|
namespace http = beast::http;
|
||||||
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
|
namespace net = boost::asio;
|
||||||
|
namespace ssl = boost::asio::ssl;
|
||||||
|
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
@ -47,23 +46,17 @@ do_session(
|
|||||||
int version,
|
int version,
|
||||||
ssl::context& ctx)
|
ssl::context& ctx)
|
||||||
{
|
{
|
||||||
// These objects perform our I/O
|
auto executor = co_await net::this_coro::executor;
|
||||||
// They use an executor with a default completion token of use_awaitable
|
auto resolver = net::ip::tcp::resolver{ executor };
|
||||||
// This makes our code easy, but will use exceptions as the default error handling,
|
auto stream = ssl::stream<beast::tcp_stream>{ executor, ctx };
|
||||||
// i.e. if the connection drops, we might see an exception.
|
|
||||||
// See async_shutdown for error handling with an error_code.
|
|
||||||
auto resolver = net::use_awaitable.as_default_on(tcp::resolver(co_await net::this_coro::executor));
|
|
||||||
using executor_with_default = net::use_awaitable_t<>::executor_with_default<net::any_io_executor>;
|
|
||||||
using tcp_stream = typename beast::tcp_stream::rebind_executor<executor_with_default>::other;
|
|
||||||
|
|
||||||
// We construct the ssl stream from the already rebound tcp_stream.
|
|
||||||
ssl::stream<tcp_stream> stream{
|
|
||||||
net::use_awaitable.as_default_on(beast::tcp_stream(co_await net::this_coro::executor)),
|
|
||||||
ctx};
|
|
||||||
|
|
||||||
// Set SNI Hostname (many hosts need this to handshake successfully)
|
// Set SNI Hostname (many hosts need this to handshake successfully)
|
||||||
if(! SSL_set_tlsext_host_name(stream.native_handle(), host.c_str()))
|
if(!SSL_set_tlsext_host_name(stream.native_handle(), host.c_str()))
|
||||||
throw boost::system::system_error(static_cast<int>(::ERR_get_error()), net::error::get_ssl_category());
|
{
|
||||||
|
throw boost::system::system_error(
|
||||||
|
static_cast<int>(::ERR_get_error()),
|
||||||
|
net::error::get_ssl_category());
|
||||||
|
}
|
||||||
|
|
||||||
// Look up the domain name
|
// Look up the domain name
|
||||||
auto const results = co_await resolver.async_resolve(host, port);
|
auto const results = co_await resolver.async_resolve(host, port);
|
||||||
@ -81,7 +74,7 @@ do_session(
|
|||||||
co_await stream.async_handshake(ssl::stream_base::client);
|
co_await stream.async_handshake(ssl::stream_base::client);
|
||||||
|
|
||||||
// Set up an HTTP GET request message
|
// Set up an HTTP GET request message
|
||||||
http::request<http::string_body> req{http::verb::get, target, version};
|
http::request<http::string_body> req{ http::verb::get, target, version };
|
||||||
req.set(http::field::host, host);
|
req.set(http::field::host, host);
|
||||||
req.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
|
req.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
|
||||||
|
|
||||||
@ -92,13 +85,13 @@ do_session(
|
|||||||
co_await http::async_write(stream, req);
|
co_await http::async_write(stream, req);
|
||||||
|
|
||||||
// This buffer is used for reading and must be persisted
|
// This buffer is used for reading and must be persisted
|
||||||
beast::flat_buffer b;
|
beast::flat_buffer buffer;
|
||||||
|
|
||||||
// Declare a container to hold the response
|
// Declare a container to hold the response
|
||||||
http::response<http::dynamic_body> res;
|
http::response<http::dynamic_body> res;
|
||||||
|
|
||||||
// Receive the HTTP response
|
// Receive the HTTP response
|
||||||
co_await http::async_read(stream, b, res);
|
co_await http::async_read(stream, buffer, res);
|
||||||
|
|
||||||
// Write the message to standard out
|
// Write the message to standard out
|
||||||
std::cout << res << std::endl;
|
std::cout << res << std::endl;
|
||||||
@ -107,7 +100,7 @@ do_session(
|
|||||||
beast::get_lowest_layer(stream).expires_after(std::chrono::seconds(30));
|
beast::get_lowest_layer(stream).expires_after(std::chrono::seconds(30));
|
||||||
|
|
||||||
// Gracefully close the stream - do not threat every error as an exception!
|
// Gracefully close the stream - do not threat every error as an exception!
|
||||||
auto [ec] = co_await stream.async_shutdown(net::as_tuple(net::use_awaitable));
|
auto [ec] = co_await stream.async_shutdown(net::as_tuple);
|
||||||
|
|
||||||
// ssl::error::stream_truncated, also known as an SSL "short read",
|
// ssl::error::stream_truncated, also known as an SSL "short read",
|
||||||
// indicates the peer closed the connection without performing the
|
// indicates the peer closed the connection without performing the
|
||||||
@ -126,75 +119,77 @@ do_session(
|
|||||||
// Therefore, if we see a short read here, it has occurred
|
// Therefore, if we see a short read here, it has occurred
|
||||||
// after the message has been completed, so it is safe to ignore it.
|
// after the message has been completed, so it is safe to ignore it.
|
||||||
|
|
||||||
if(ec != net::ssl::error::stream_truncated)
|
if(ec && ec != net::ssl::error::stream_truncated)
|
||||||
throw boost::system::system_error(ec, "shutdown");
|
throw boost::system::system_error(ec, "shutdown");
|
||||||
}
|
}
|
||||||
|
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
int main(int argc, char** argv)
|
int
|
||||||
|
main(int argc, char** argv)
|
||||||
{
|
{
|
||||||
// Check command line arguments.
|
try
|
||||||
if(argc != 4 && argc != 5)
|
|
||||||
{
|
{
|
||||||
std::cerr <<
|
// Check command line arguments.
|
||||||
"Usage: http-client-awaitable <host> <port> <target> [<HTTP version: 1.0 or 1.1(default)>]\n" <<
|
if(argc != 4 && argc != 5)
|
||||||
"Example:\n" <<
|
{
|
||||||
" http-client-awaitable www.example.com 443 /\n" <<
|
std::cerr
|
||||||
" http-client-awaitable www.example.com 443 / 1.0\n";
|
<< "Usage: http-client-awaitable <host> <port> <target> [<HTTP version: 1.0 or 1.1(default)>]\n"
|
||||||
|
<< "Example:\n"
|
||||||
|
<< " http-client-awaitable www.example.com 443 /\n"
|
||||||
|
<< " http-client-awaitable www.example.com 443 / 1.0\n";
|
||||||
|
return EXIT_FAILURE;
|
||||||
|
}
|
||||||
|
auto const host = argv[1];
|
||||||
|
auto const port = argv[2];
|
||||||
|
auto const target = argv[3];
|
||||||
|
auto const version =
|
||||||
|
argc == 5 && !std::strcmp("1.0", argv[4]) ? 10 : 11;
|
||||||
|
|
||||||
|
// The io_context is required for all I/O
|
||||||
|
net::io_context ioc;
|
||||||
|
|
||||||
|
// The SSL context is required, and holds certificates
|
||||||
|
ssl::context ctx{ ssl::context::tlsv12_client };
|
||||||
|
|
||||||
|
// This holds the root certificate used for verification
|
||||||
|
load_root_certificates(ctx);
|
||||||
|
|
||||||
|
// Verify the remote server's certificate
|
||||||
|
ctx.set_verify_mode(ssl::verify_peer);
|
||||||
|
|
||||||
|
// Launch the asynchronous operation
|
||||||
|
net::co_spawn(
|
||||||
|
ioc,
|
||||||
|
do_session(host, port, target, version, ctx),
|
||||||
|
// If the awaitable exists with an exception, it gets delivered here
|
||||||
|
// as `e`. This can happen for regular errors, such as connection
|
||||||
|
// drops.
|
||||||
|
[](std::exception_ptr e)
|
||||||
|
{
|
||||||
|
if(e)
|
||||||
|
std::rethrow_exception(e);
|
||||||
|
});
|
||||||
|
|
||||||
|
// Run the I/O service. The call will return when
|
||||||
|
// the get operation is complete.
|
||||||
|
ioc.run();
|
||||||
|
}
|
||||||
|
catch(std::exception const& e)
|
||||||
|
{
|
||||||
|
std::cerr << "Error: " << e.what() << std::endl;
|
||||||
return EXIT_FAILURE;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
auto const host = argv[1];
|
|
||||||
auto const port = argv[2];
|
|
||||||
auto const target = argv[3];
|
|
||||||
int version = argc == 5 && !std::strcmp("1.0", argv[4]) ? 10 : 11;
|
|
||||||
|
|
||||||
// The io_context is required for all I/O
|
|
||||||
net::io_context ioc;
|
|
||||||
|
|
||||||
// The SSL context is required, and holds certificates
|
|
||||||
ssl::context ctx{ssl::context::tlsv12_client};
|
|
||||||
|
|
||||||
// This holds the root certificate used for verification
|
|
||||||
load_root_certificates(ctx);
|
|
||||||
|
|
||||||
// Verify the remote server's certificate
|
|
||||||
ctx.set_verify_mode(ssl::verify_peer);
|
|
||||||
|
|
||||||
|
|
||||||
// Launch the asynchronous operation
|
|
||||||
net::co_spawn(
|
|
||||||
ioc,
|
|
||||||
do_session(host, port, target, version, ctx),
|
|
||||||
// If the awaitable exists with an exception, it gets delivered here as `e`.
|
|
||||||
// This can happen for regular errors, such as connection drops.
|
|
||||||
[](std::exception_ptr e)
|
|
||||||
{
|
|
||||||
if (!e)
|
|
||||||
return ;
|
|
||||||
try
|
|
||||||
{
|
|
||||||
std::rethrow_exception(e);
|
|
||||||
}
|
|
||||||
catch(std::exception & ex)
|
|
||||||
{
|
|
||||||
std::cerr << "Error: " << ex.what() << "\n";
|
|
||||||
}
|
|
||||||
});
|
|
||||||
|
|
||||||
// Run the I/O service. The call will return when
|
|
||||||
// the get operation is complete.
|
|
||||||
ioc.run();
|
|
||||||
|
|
||||||
return EXIT_SUCCESS;
|
return EXIT_SUCCESS;
|
||||||
}
|
}
|
||||||
|
|
||||||
#else
|
#else
|
||||||
|
|
||||||
int main(int, char * [])
|
int
|
||||||
|
main(int, char*[])
|
||||||
{
|
{
|
||||||
std::printf("awaitables require C++20\n");
|
std::printf("awaitables require C++20\n");
|
||||||
return 1;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
@ -13,44 +13,30 @@
|
|||||||
//
|
//
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
#include <boost/asio/awaitable.hpp>
|
||||||
|
#include <boost/asio/co_spawn.hpp>
|
||||||
|
#include <boost/asio/io_context.hpp>
|
||||||
#include <boost/beast/core.hpp>
|
#include <boost/beast/core.hpp>
|
||||||
#include <boost/beast/http.hpp>
|
#include <boost/beast/http.hpp>
|
||||||
#include <boost/beast/version.hpp>
|
#include <boost/beast/version.hpp>
|
||||||
#include <boost/asio/awaitable.hpp>
|
|
||||||
#include <boost/asio/co_spawn.hpp>
|
|
||||||
#include <boost/asio/detached.hpp>
|
|
||||||
#include <boost/asio/use_awaitable.hpp>
|
|
||||||
|
|
||||||
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
|
||||||
|
|
||||||
#include <cstdlib>
|
#include <cstdlib>
|
||||||
#include <functional>
|
|
||||||
#include <iostream>
|
#include <iostream>
|
||||||
#include <string>
|
#include <string>
|
||||||
|
|
||||||
namespace beast = boost::beast; // from <boost/beast.hpp>
|
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
||||||
namespace http = beast::http; // from <boost/beast/http.hpp>
|
|
||||||
namespace net = boost::asio; // from <boost/asio.hpp>
|
|
||||||
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
|
|
||||||
|
|
||||||
//------------------------------------------------------------------------------
|
namespace beast = boost::beast;
|
||||||
|
namespace http = beast::http;
|
||||||
|
namespace net = boost::asio;
|
||||||
|
|
||||||
// Performs an HTTP GET and prints the response
|
// Performs an HTTP GET and prints the response
|
||||||
net::awaitable<void>
|
net::awaitable<void>
|
||||||
do_session(
|
do_session(std::string host, std::string port, std::string target, int version)
|
||||||
std::string host,
|
|
||||||
std::string port,
|
|
||||||
std::string target,
|
|
||||||
int version)
|
|
||||||
{
|
{
|
||||||
// These objects perform our I/O
|
auto executor = co_await net::this_coro::executor;
|
||||||
// They use an executor with a default completion token of use_awaitable
|
auto resolver = net::ip::tcp::resolver{ executor };
|
||||||
// This makes our code easy, but will use exceptions as the default error handling,
|
auto stream = beast::tcp_stream{ executor };
|
||||||
// i.e. if the connection drops, we might see an exception.
|
|
||||||
auto resolver = net::use_awaitable.as_default_on(tcp::resolver(co_await net::this_coro::executor));
|
|
||||||
auto stream = net::use_awaitable.as_default_on(beast::tcp_stream(co_await net::this_coro::executor));
|
|
||||||
|
|
||||||
// Look up the domain name
|
// Look up the domain name
|
||||||
auto const results = co_await resolver.async_resolve(host, port);
|
auto const results = co_await resolver.async_resolve(host, port);
|
||||||
@ -62,7 +48,7 @@ do_session(
|
|||||||
co_await stream.async_connect(results);
|
co_await stream.async_connect(results);
|
||||||
|
|
||||||
// Set up an HTTP GET request message
|
// Set up an HTTP GET request message
|
||||||
http::request<http::string_body> req{http::verb::get, target, version};
|
http::request<http::string_body> req{ http::verb::get, target, version };
|
||||||
req.set(http::field::host, host);
|
req.set(http::field::host, host);
|
||||||
req.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
|
req.set(http::field::user_agent, BOOST_BEAST_VERSION_STRING);
|
||||||
|
|
||||||
@ -73,20 +59,20 @@ do_session(
|
|||||||
co_await http::async_write(stream, req);
|
co_await http::async_write(stream, req);
|
||||||
|
|
||||||
// This buffer is used for reading and must be persisted
|
// This buffer is used for reading and must be persisted
|
||||||
beast::flat_buffer b;
|
beast::flat_buffer buffer;
|
||||||
|
|
||||||
// Declare a container to hold the response
|
// Declare a container to hold the response
|
||||||
http::response<http::dynamic_body> res;
|
http::response<http::dynamic_body> res;
|
||||||
|
|
||||||
// Receive the HTTP response
|
// Receive the HTTP response
|
||||||
co_await http::async_read(stream, b, res);
|
co_await http::async_read(stream, buffer, res);
|
||||||
|
|
||||||
// Write the message to standard out
|
// Write the message to standard out
|
||||||
std::cout << res << std::endl;
|
std::cout << res << std::endl;
|
||||||
|
|
||||||
// Gracefully close the socket
|
// Gracefully close the socket
|
||||||
beast::error_code ec;
|
beast::error_code ec;
|
||||||
stream.socket().shutdown(tcp::socket::shutdown_both, ec);
|
stream.socket().shutdown(net::ip::tcp::socket::shutdown_both, ec);
|
||||||
|
|
||||||
// not_connected happens sometimes
|
// not_connected happens sometimes
|
||||||
// so don't bother reporting it.
|
// so don't bother reporting it.
|
||||||
@ -99,58 +85,61 @@ do_session(
|
|||||||
|
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
int main(int argc, char** argv)
|
int
|
||||||
|
main(int argc, char** argv)
|
||||||
{
|
{
|
||||||
// Check command line arguments.
|
try
|
||||||
if(argc != 4 && argc != 5)
|
|
||||||
{
|
{
|
||||||
std::cerr <<
|
// Check command line arguments.
|
||||||
"Usage: http-client-awaitable <host> <port> <target> [<HTTP version: 1.0 or 1.1(default)>]\n" <<
|
if(argc != 4 && argc != 5)
|
||||||
"Example:\n" <<
|
{
|
||||||
" http-client-awaitable www.example.com 80 /\n" <<
|
std::cerr << "Usage: http-client-awaitable <host> <port> <target> [<HTTP version: 1.0 or 1.1(default)>]\n"
|
||||||
" http-client-awaitable www.example.com 80 / 1.0\n";
|
<< "Example:\n"
|
||||||
|
<< " http-client-awaitable www.example.com 80 /\n"
|
||||||
|
<< " http-client-awaitable www.example.com 80 / 1.0\n";
|
||||||
|
return EXIT_FAILURE;
|
||||||
|
}
|
||||||
|
auto const host = argv[1];
|
||||||
|
auto const port = argv[2];
|
||||||
|
auto const target = argv[3];
|
||||||
|
auto const version =
|
||||||
|
argc == 5 && !std::strcmp("1.0", argv[4]) ? 10 : 11;
|
||||||
|
|
||||||
|
// The io_context is required for all I/O
|
||||||
|
net::io_context ioc;
|
||||||
|
|
||||||
|
// Launch the asynchronous operation
|
||||||
|
net::co_spawn(
|
||||||
|
ioc,
|
||||||
|
do_session(host, port, target, version),
|
||||||
|
// If the awaitable exists with an exception, it gets delivered here
|
||||||
|
// as `e`. This can happen for regular errors, such as connection
|
||||||
|
// drops.
|
||||||
|
[](std::exception_ptr e)
|
||||||
|
{
|
||||||
|
if(e)
|
||||||
|
std::rethrow_exception(e);
|
||||||
|
});
|
||||||
|
|
||||||
|
// Run the I/O service. The call will return when
|
||||||
|
// the get operation is complete.
|
||||||
|
ioc.run();
|
||||||
|
}
|
||||||
|
catch(std::exception const& e)
|
||||||
|
{
|
||||||
|
std::cerr << "Error: " << e.what() << std::endl;
|
||||||
return EXIT_FAILURE;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
auto const host = argv[1];
|
|
||||||
auto const port = argv[2];
|
|
||||||
auto const target = argv[3];
|
|
||||||
int version = argc == 5 && !std::strcmp("1.0", argv[4]) ? 10 : 11;
|
|
||||||
|
|
||||||
// The io_context is required for all I/O
|
|
||||||
net::io_context ioc;
|
|
||||||
|
|
||||||
// Launch the asynchronous operation
|
|
||||||
net::co_spawn(
|
|
||||||
ioc,
|
|
||||||
do_session(host, port, target, version),
|
|
||||||
// If the awaitable exists with an exception, it gets delivered here as `e`.
|
|
||||||
// This can happen for regular errors, such as connection drops.
|
|
||||||
[](std::exception_ptr e)
|
|
||||||
{
|
|
||||||
if (e)
|
|
||||||
try
|
|
||||||
{
|
|
||||||
std::rethrow_exception(e);
|
|
||||||
}
|
|
||||||
catch(std::exception & ex)
|
|
||||||
{
|
|
||||||
std::cerr << "Error: " << ex.what() << "\n";
|
|
||||||
}
|
|
||||||
});
|
|
||||||
|
|
||||||
// Run the I/O service. The call will return when
|
|
||||||
// the get operation is complete.
|
|
||||||
ioc.run();
|
|
||||||
|
|
||||||
return EXIT_SUCCESS;
|
return EXIT_SUCCESS;
|
||||||
}
|
}
|
||||||
|
|
||||||
#else
|
#else
|
||||||
|
|
||||||
int main(int, char * [])
|
int
|
||||||
|
main(int, char*[])
|
||||||
{
|
{
|
||||||
std::printf("awaitables require C++20\n");
|
std::printf("awaitables require C++20\n");
|
||||||
return 1;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
@ -13,14 +13,15 @@
|
|||||||
//
|
//
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
#include <boost/asio/awaitable.hpp>
|
||||||
|
#include <boost/asio/co_spawn.hpp>
|
||||||
|
#include <boost/asio/io_context.hpp>
|
||||||
|
#include <boost/asio/ip/tcp.hpp>
|
||||||
#include <boost/beast/core.hpp>
|
#include <boost/beast/core.hpp>
|
||||||
#include <boost/beast/http.hpp>
|
#include <boost/beast/http.hpp>
|
||||||
#include <boost/beast/version.hpp>
|
#include <boost/beast/version.hpp>
|
||||||
#include <boost/asio/ip/tcp.hpp>
|
|
||||||
#include <boost/asio/awaitable.hpp>
|
|
||||||
#include <boost/asio/co_spawn.hpp>
|
|
||||||
#include <boost/asio/use_awaitable.hpp>
|
|
||||||
#include <boost/config.hpp>
|
#include <boost/config.hpp>
|
||||||
|
|
||||||
#include <algorithm>
|
#include <algorithm>
|
||||||
#include <cstdlib>
|
#include <cstdlib>
|
||||||
#include <iostream>
|
#include <iostream>
|
||||||
@ -31,13 +32,9 @@
|
|||||||
|
|
||||||
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
||||||
|
|
||||||
namespace beast = boost::beast; // from <boost/beast.hpp>
|
namespace beast = boost::beast;
|
||||||
namespace http = beast::http; // from <boost/beast/http.hpp>
|
namespace http = beast::http;
|
||||||
namespace net = boost::asio; // from <boost/asio.hpp>
|
namespace net = boost::asio;
|
||||||
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
|
|
||||||
|
|
||||||
using tcp_stream = typename beast::tcp_stream::rebind_executor<
|
|
||||||
net::use_awaitable_t<>::executor_with_default<net::any_io_executor>>::other;
|
|
||||||
|
|
||||||
// Return a reasonable mime type based on the extension of a file.
|
// Return a reasonable mime type based on the extension of a file.
|
||||||
beast::string_view
|
beast::string_view
|
||||||
@ -206,146 +203,123 @@ handle_request(
|
|||||||
return res;
|
return res;
|
||||||
}
|
}
|
||||||
|
|
||||||
//------------------------------------------------------------------------------
|
|
||||||
|
|
||||||
|
|
||||||
// Handles an HTTP server connection
|
// Handles an HTTP server connection
|
||||||
net::awaitable<void>
|
net::awaitable<void>
|
||||||
do_session(
|
do_session(
|
||||||
tcp_stream stream,
|
beast::tcp_stream stream,
|
||||||
std::shared_ptr<std::string const> doc_root)
|
std::shared_ptr<std::string const> doc_root)
|
||||||
{
|
{
|
||||||
// This buffer is required to persist across reads
|
// This buffer is required to persist across reads
|
||||||
beast::flat_buffer buffer;
|
beast::flat_buffer buffer;
|
||||||
|
|
||||||
// This lambda is used to send messages
|
for(;;)
|
||||||
try
|
|
||||||
{
|
{
|
||||||
for(;;)
|
// Set the timeout.
|
||||||
|
stream.expires_after(std::chrono::seconds(30));
|
||||||
|
|
||||||
|
// Read a request
|
||||||
|
http::request<http::string_body> req;
|
||||||
|
co_await http::async_read(stream, buffer, req);
|
||||||
|
|
||||||
|
// Handle the request
|
||||||
|
http::message_generator msg = handle_request(*doc_root, std::move(req));
|
||||||
|
|
||||||
|
// Determine if we should close the connection
|
||||||
|
bool keep_alive = msg.keep_alive();
|
||||||
|
|
||||||
|
// Send the response
|
||||||
|
co_await beast::async_write(stream, std::move(msg));
|
||||||
|
|
||||||
|
if(!keep_alive)
|
||||||
{
|
{
|
||||||
// Set the timeout.
|
// This means we should close the connection, usually because
|
||||||
stream.expires_after(std::chrono::seconds(30));
|
// the response indicated the "Connection: close" semantic.
|
||||||
|
break;
|
||||||
// Read a request
|
|
||||||
http::request<http::string_body> req;
|
|
||||||
co_await http::async_read(stream, buffer, req);
|
|
||||||
|
|
||||||
// Handle the request
|
|
||||||
http::message_generator msg =
|
|
||||||
handle_request(*doc_root, std::move(req));
|
|
||||||
|
|
||||||
// Determine if we should close the connection
|
|
||||||
bool keep_alive = msg.keep_alive();
|
|
||||||
|
|
||||||
// Send the response
|
|
||||||
co_await beast::async_write(stream, std::move(msg), net::use_awaitable);
|
|
||||||
|
|
||||||
if(! keep_alive)
|
|
||||||
{
|
|
||||||
// This means we should close the connection, usually because
|
|
||||||
// the response indicated the "Connection: close" semantic.
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
catch (boost::system::system_error & se)
|
|
||||||
{
|
|
||||||
if (se.code() != http::error::end_of_stream )
|
|
||||||
throw ;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Send a TCP shutdown
|
// Send a TCP shutdown
|
||||||
beast::error_code ec;
|
stream.socket().shutdown(net::ip::tcp::socket::shutdown_send);
|
||||||
stream.socket().shutdown(tcp::socket::shutdown_send, ec);
|
|
||||||
|
|
||||||
// At this point the connection is closed gracefully
|
// At this point the connection is closed gracefully
|
||||||
// we ignore the error because the client might have
|
// we ignore the error because the client might have
|
||||||
// dropped the connection already.
|
// dropped the connection already.
|
||||||
}
|
}
|
||||||
|
|
||||||
//------------------------------------------------------------------------------
|
|
||||||
|
|
||||||
// Accepts incoming connections and launches the sessions
|
// Accepts incoming connections and launches the sessions
|
||||||
net::awaitable<void>
|
net::awaitable<void>
|
||||||
do_listen(
|
do_listen(net::ip::tcp::endpoint endpoint, std::shared_ptr<std::string const> doc_root)
|
||||||
tcp::endpoint endpoint,
|
|
||||||
std::shared_ptr<std::string const> doc_root)
|
|
||||||
{
|
{
|
||||||
// Open the acceptor
|
auto executor = co_await net::this_coro::executor;
|
||||||
auto acceptor = net::use_awaitable.as_default_on(tcp::acceptor(co_await net::this_coro::executor));
|
auto acceptor = net::ip::tcp::acceptor{ executor, endpoint };
|
||||||
acceptor.open(endpoint.protocol());
|
|
||||||
|
|
||||||
// Allow address reuse
|
|
||||||
acceptor.set_option(net::socket_base::reuse_address(true));
|
|
||||||
|
|
||||||
// Bind to the server address
|
|
||||||
acceptor.bind(endpoint);
|
|
||||||
|
|
||||||
// Start listening for connections
|
|
||||||
acceptor.listen(net::socket_base::max_listen_connections);
|
|
||||||
|
|
||||||
for(;;)
|
for(;;)
|
||||||
boost::asio::co_spawn(
|
{
|
||||||
acceptor.get_executor(),
|
net::co_spawn(
|
||||||
do_session(tcp_stream(co_await acceptor.async_accept()), doc_root),
|
executor,
|
||||||
[](std::exception_ptr e)
|
do_session(
|
||||||
|
beast::tcp_stream{ co_await acceptor.async_accept() },
|
||||||
|
doc_root),
|
||||||
|
[](std::exception_ptr e)
|
||||||
|
{
|
||||||
|
if(e)
|
||||||
{
|
{
|
||||||
if (e)
|
try
|
||||||
try
|
{
|
||||||
{
|
std::rethrow_exception(e);
|
||||||
std::rethrow_exception(e);
|
}
|
||||||
}
|
catch(std::exception const& e)
|
||||||
catch (std::exception &e) {
|
{
|
||||||
std::cerr << "Error in session: " << e.what() << "\n";
|
std::cerr << "Error in session: " << e.what() << "\n";
|
||||||
}
|
}
|
||||||
});
|
}
|
||||||
|
});
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
int main(int argc, char* argv[])
|
int
|
||||||
|
main(int argc, char* argv[])
|
||||||
{
|
{
|
||||||
// Check command line arguments.
|
// Check command line arguments.
|
||||||
if (argc != 5)
|
if(argc != 5)
|
||||||
{
|
{
|
||||||
std::cerr <<
|
std::cerr << "Usage: http-server-awaitable <address> <port> <doc_root> <threads>\n"
|
||||||
"Usage: http-server-awaitable <address> <port> <doc_root> <threads>\n" <<
|
<< "Example:\n"
|
||||||
"Example:\n" <<
|
<< " http-server-awaitable 0.0.0.0 8080 . 1\n";
|
||||||
" http-server-awaitable 0.0.0.0 8080 . 1\n";
|
|
||||||
return EXIT_FAILURE;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
auto const address = net::ip::make_address(argv[1]);
|
auto const address = net::ip::make_address(argv[1]);
|
||||||
auto const port = static_cast<unsigned short>(std::atoi(argv[2]));
|
auto const port = static_cast<unsigned short>(std::atoi(argv[2]));
|
||||||
auto const doc_root = std::make_shared<std::string>(argv[3]);
|
auto const doc_root = std::make_shared<std::string>(argv[3]);
|
||||||
auto const threads = std::max<int>(1, std::atoi(argv[4]));
|
auto const threads = std::max<int>(1, std::atoi(argv[4]));
|
||||||
|
|
||||||
// The io_context is required for all I/O
|
// The io_context is required for all I/O
|
||||||
net::io_context ioc{threads};
|
net::io_context ioc{ threads };
|
||||||
|
|
||||||
// Spawn a listening port
|
// Spawn a listening port
|
||||||
boost::asio::co_spawn(ioc,
|
net::co_spawn(
|
||||||
do_listen(tcp::endpoint{address, port}, doc_root),
|
ioc,
|
||||||
[](std::exception_ptr e)
|
do_listen(net::ip::tcp::endpoint{ address, port }, doc_root),
|
||||||
{
|
[](std::exception_ptr e)
|
||||||
if (e)
|
{
|
||||||
try
|
if(e)
|
||||||
{
|
{
|
||||||
std::rethrow_exception(e);
|
try
|
||||||
}
|
{
|
||||||
catch(std::exception & e)
|
std::rethrow_exception(e);
|
||||||
{
|
}
|
||||||
std::cerr << "Error in acceptor: " << e.what() << "\n";
|
catch(std::exception const& e)
|
||||||
}
|
{
|
||||||
});
|
std::cerr << "Error: " << e.what() << std::endl;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
// Run the I/O service on the requested number of threads
|
// Run the I/O service on the requested number of threads
|
||||||
std::vector<std::thread> v;
|
std::vector<std::thread> v;
|
||||||
v.reserve(threads - 1);
|
v.reserve(threads - 1);
|
||||||
for(auto i = threads - 1; i > 0; --i)
|
for(auto i = threads - 1; i > 0; --i)
|
||||||
v.emplace_back(
|
v.emplace_back([&ioc] { ioc.run(); });
|
||||||
[&ioc]
|
|
||||||
{
|
|
||||||
ioc.run();
|
|
||||||
});
|
|
||||||
ioc.run();
|
ioc.run();
|
||||||
|
|
||||||
return EXIT_SUCCESS;
|
return EXIT_SUCCESS;
|
||||||
@ -353,10 +327,11 @@ int main(int argc, char* argv[])
|
|||||||
|
|
||||||
#else
|
#else
|
||||||
|
|
||||||
int main(int, char * [])
|
int
|
||||||
|
main(int, char*[])
|
||||||
{
|
{
|
||||||
std::printf("awaitables require C++20\n");
|
std::printf("awaitables require C++20\n");
|
||||||
return 1;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
|
|
||||||
#endif
|
#endif
|
@ -13,49 +13,39 @@
|
|||||||
//
|
//
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
#include <boost/beast/core.hpp>
|
|
||||||
#include <boost/beast/websocket.hpp>
|
|
||||||
#include <cstdlib>
|
|
||||||
#include <functional>
|
|
||||||
#include <iostream>
|
|
||||||
#include <string>
|
|
||||||
#include <boost/asio/awaitable.hpp>
|
#include <boost/asio/awaitable.hpp>
|
||||||
#include <boost/asio/co_spawn.hpp>
|
#include <boost/asio/co_spawn.hpp>
|
||||||
#include <boost/asio/detached.hpp>
|
#include <boost/asio/io_context.hpp>
|
||||||
#include <boost/asio/use_awaitable.hpp>
|
#include <boost/beast/core.hpp>
|
||||||
|
#include <boost/beast/websocket.hpp>
|
||||||
|
|
||||||
|
#include <cstdlib>
|
||||||
|
#include <iostream>
|
||||||
|
#include <string>
|
||||||
|
|
||||||
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
||||||
|
|
||||||
|
namespace beast = boost::beast;
|
||||||
namespace beast = boost::beast; // from <boost/beast.hpp>
|
namespace http = beast::http;
|
||||||
namespace http = beast::http; // from <boost/beast/http.hpp>
|
namespace websocket = beast::websocket;
|
||||||
namespace websocket = beast::websocket; // from <boost/beast/websocket.hpp>
|
namespace net = boost::asio;
|
||||||
namespace net = boost::asio; // from <boost/asio.hpp>
|
|
||||||
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
|
|
||||||
|
|
||||||
//------------------------------------------------------------------------------
|
|
||||||
|
|
||||||
// Sends a WebSocket message and prints the response
|
// Sends a WebSocket message and prints the response
|
||||||
net::awaitable<void>
|
net::awaitable<void>
|
||||||
do_session(
|
do_session(std::string host, std::string port, std::string text)
|
||||||
std::string host,
|
|
||||||
std::string port,
|
|
||||||
std::string text)
|
|
||||||
{
|
{
|
||||||
// These objects perform our I/O
|
auto executor = co_await net::this_coro::executor;
|
||||||
auto resolver = net::use_awaitable.as_default_on(
|
auto resolver = net::ip::tcp::resolver{ executor };
|
||||||
tcp::resolver(co_await net::this_coro::executor));
|
auto stream = websocket::stream<beast::tcp_stream>{ executor };
|
||||||
auto ws = net::use_awaitable.as_default_on(
|
|
||||||
websocket::stream<beast::tcp_stream>(co_await net::this_coro::executor));
|
|
||||||
|
|
||||||
// Look up the domain name
|
// Look up the domain name
|
||||||
auto const results = co_await resolver.async_resolve(host, port);
|
auto const results = co_await resolver.async_resolve(host, port);
|
||||||
|
|
||||||
// Set a timeout on the operation
|
// Set a timeout on the operation
|
||||||
beast::get_lowest_layer(ws).expires_after(std::chrono::seconds(30));
|
beast::get_lowest_layer(stream).expires_after(std::chrono::seconds(30));
|
||||||
|
|
||||||
// Make the connection on the IP address we get from a lookup
|
// Make the connection on the IP address we get from a lookup
|
||||||
auto ep = co_await beast::get_lowest_layer(ws).async_connect(results);
|
auto ep = co_await beast::get_lowest_layer(stream).async_connect(results);
|
||||||
|
|
||||||
// Update the host_ string. This will provide the value of the
|
// Update the host_ string. This will provide the value of the
|
||||||
// Host HTTP header during the WebSocket handshake.
|
// Host HTTP header during the WebSocket handshake.
|
||||||
@ -64,36 +54,36 @@ do_session(
|
|||||||
|
|
||||||
// Turn off the timeout on the tcp_stream, because
|
// Turn off the timeout on the tcp_stream, because
|
||||||
// the websocket stream has its own timeout system.
|
// the websocket stream has its own timeout system.
|
||||||
beast::get_lowest_layer(ws).expires_never();
|
beast::get_lowest_layer(stream).expires_never();
|
||||||
|
|
||||||
// Set suggested timeout settings for the websocket
|
// Set suggested timeout settings for the websocket
|
||||||
ws.set_option(
|
stream.set_option(
|
||||||
websocket::stream_base::timeout::suggested(
|
websocket::stream_base::timeout::suggested(beast::role_type::client));
|
||||||
beast::role_type::client));
|
|
||||||
|
|
||||||
// Set a decorator to change the User-Agent of the handshake
|
// Set a decorator to change the User-Agent of the handshake
|
||||||
ws.set_option(websocket::stream_base::decorator(
|
stream.set_option(websocket::stream_base::decorator(
|
||||||
[](websocket::request_type& req)
|
[](websocket::request_type& req)
|
||||||
{
|
{
|
||||||
req.set(http::field::user_agent,
|
req.set(
|
||||||
|
http::field::user_agent,
|
||||||
std::string(BOOST_BEAST_VERSION_STRING) +
|
std::string(BOOST_BEAST_VERSION_STRING) +
|
||||||
" websocket-client-coro");
|
" websocket-client-coro");
|
||||||
}));
|
}));
|
||||||
|
|
||||||
// Perform the websocket handshake
|
// Perform the websocket handshake
|
||||||
co_await ws.async_handshake(host, "/");
|
co_await stream.async_handshake(host, "/");
|
||||||
|
|
||||||
// Send the message
|
// Send the message
|
||||||
co_await ws.async_write(net::buffer(std::string(text)));
|
co_await stream.async_write(net::buffer(text));
|
||||||
|
|
||||||
// This buffer will hold the incoming message
|
// This buffer will hold the incoming message
|
||||||
beast::flat_buffer buffer;
|
beast::flat_buffer buffer;
|
||||||
|
|
||||||
// Read a message into our buffer
|
// Read a message into our buffer
|
||||||
co_await ws.async_read(buffer);
|
co_await stream.async_read(buffer);
|
||||||
|
|
||||||
// Close the WebSocket connection
|
// Close the WebSocket connection
|
||||||
co_await ws.async_close(websocket::close_code::normal);
|
co_await stream.async_close(websocket::close_code::normal);
|
||||||
|
|
||||||
// If we get here then the connection is closed gracefully
|
// If we get here then the connection is closed gracefully
|
||||||
|
|
||||||
@ -103,53 +93,56 @@ do_session(
|
|||||||
|
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
int main(int argc, char** argv)
|
int
|
||||||
|
main(int argc, char** argv)
|
||||||
{
|
{
|
||||||
// Check command line arguments.
|
try
|
||||||
if(argc != 4)
|
|
||||||
{
|
{
|
||||||
std::cerr <<
|
// Check command line arguments.
|
||||||
"Usage: websocket-client-awaitable <host> <port> <text>\n" <<
|
if(argc != 4)
|
||||||
"Example:\n" <<
|
{
|
||||||
" websocket-client-awaitable echo.websocket.org 80 \"Hello, world!\"\n";
|
std::cerr
|
||||||
|
<< "Usage: websocket-client-awaitable <host> <port> <text>\n"
|
||||||
|
<< "Example:\n"
|
||||||
|
<< " websocket-client-awaitable echo.websocket.org 80 \"Hello, world!\"\n";
|
||||||
|
return EXIT_FAILURE;
|
||||||
|
}
|
||||||
|
auto const host = argv[1];
|
||||||
|
auto const port = argv[2];
|
||||||
|
auto const text = argv[3];
|
||||||
|
|
||||||
|
// The io_context is required for all I/O
|
||||||
|
net::io_context ioc;
|
||||||
|
|
||||||
|
// Launch the asynchronous operation
|
||||||
|
net::co_spawn(
|
||||||
|
ioc,
|
||||||
|
do_session(host, port, text),
|
||||||
|
[](std::exception_ptr e)
|
||||||
|
{
|
||||||
|
if(e)
|
||||||
|
std::rethrow_exception(e);
|
||||||
|
});
|
||||||
|
|
||||||
|
// Run the I/O service. The call will return when
|
||||||
|
// the socket is closed.
|
||||||
|
ioc.run();
|
||||||
|
}
|
||||||
|
catch(std::exception const& e)
|
||||||
|
{
|
||||||
|
std::cerr << "Error: " << e.what() << std::endl;
|
||||||
return EXIT_FAILURE;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
auto const host = argv[1];
|
|
||||||
auto const port = argv[2];
|
|
||||||
auto const text = argv[3];
|
|
||||||
|
|
||||||
// The io_context is required for all I/O
|
|
||||||
net::io_context ioc;
|
|
||||||
|
|
||||||
// Launch the asynchronous operation
|
|
||||||
net::co_spawn(ioc,
|
|
||||||
do_session(host, port, text),
|
|
||||||
[](std::exception_ptr e)
|
|
||||||
{
|
|
||||||
if (e)
|
|
||||||
try
|
|
||||||
{
|
|
||||||
std::rethrow_exception(e);
|
|
||||||
}
|
|
||||||
catch(std::exception & e)
|
|
||||||
{
|
|
||||||
std::cerr << "Error: " << e.what() << "\n";
|
|
||||||
}
|
|
||||||
});
|
|
||||||
|
|
||||||
// Run the I/O service. The call will return when
|
|
||||||
// the socket is closed.
|
|
||||||
ioc.run();
|
|
||||||
|
|
||||||
return EXIT_SUCCESS;
|
return EXIT_SUCCESS;
|
||||||
}
|
}
|
||||||
|
|
||||||
#else
|
#else
|
||||||
|
|
||||||
int main(int, char * [])
|
int
|
||||||
|
main(int, char*[])
|
||||||
{
|
{
|
||||||
std::printf("awaitables require C++20\n");
|
std::printf("awaitables require C++20\n");
|
||||||
return 1;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
@ -13,162 +13,141 @@
|
|||||||
//
|
//
|
||||||
//------------------------------------------------------------------------------
|
//------------------------------------------------------------------------------
|
||||||
|
|
||||||
#include <boost/beast/core.hpp>
|
#include <boost/asio/as_tuple.hpp>
|
||||||
#include <boost/beast/websocket.hpp>
|
|
||||||
#include <boost/asio/awaitable.hpp>
|
#include <boost/asio/awaitable.hpp>
|
||||||
#include <boost/asio/co_spawn.hpp>
|
#include <boost/asio/co_spawn.hpp>
|
||||||
#include <boost/asio/detached.hpp>
|
#include <boost/asio/io_context.hpp>
|
||||||
#include <boost/asio/use_awaitable.hpp>
|
#include <boost/beast/core.hpp>
|
||||||
|
#include <boost/beast/websocket.hpp>
|
||||||
|
|
||||||
#include <algorithm>
|
#include <algorithm>
|
||||||
#include <cstdlib>
|
#include <cstdlib>
|
||||||
#include <functional>
|
|
||||||
#include <iostream>
|
#include <iostream>
|
||||||
#include <memory>
|
|
||||||
#include <string>
|
#include <string>
|
||||||
#include <thread>
|
#include <thread>
|
||||||
#include <vector>
|
#include <vector>
|
||||||
|
|
||||||
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
#if defined(BOOST_ASIO_HAS_CO_AWAIT)
|
||||||
|
|
||||||
namespace beast = boost::beast; // from <boost/beast.hpp>
|
namespace beast = boost::beast;
|
||||||
namespace http = beast::http; // from <boost/beast/http.hpp>
|
namespace http = beast::http;
|
||||||
namespace websocket = beast::websocket; // from <boost/beast/websocket.hpp>
|
namespace websocket = beast::websocket;
|
||||||
namespace net = boost::asio; // from <boost/asio.hpp>
|
namespace net = boost::asio;
|
||||||
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
|
|
||||||
|
|
||||||
using stream = websocket::stream<
|
|
||||||
typename beast::tcp_stream::rebind_executor<
|
|
||||||
typename net::use_awaitable_t<>::executor_with_default<net::any_io_executor>>::other>;
|
|
||||||
|
|
||||||
//------------------------------------------------------------------------------
|
|
||||||
|
|
||||||
// Echoes back all received WebSocket messages
|
// Echoes back all received WebSocket messages
|
||||||
net::awaitable<void>
|
net::awaitable<void>
|
||||||
do_session(stream ws)
|
do_session(websocket::stream<beast::tcp_stream> stream)
|
||||||
{
|
{
|
||||||
// Set suggested timeout settings for the websocket
|
// Set suggested timeout settings for the websocket
|
||||||
ws.set_option(
|
stream.set_option(
|
||||||
websocket::stream_base::timeout::suggested(
|
websocket::stream_base::timeout::suggested(beast::role_type::server));
|
||||||
beast::role_type::server));
|
|
||||||
|
|
||||||
// Set a decorator to change the Server of the handshake
|
// Set a decorator to change the Server of the handshake
|
||||||
ws.set_option(websocket::stream_base::decorator(
|
stream.set_option(websocket::stream_base::decorator(
|
||||||
[](websocket::response_type& res)
|
[](websocket::response_type& res)
|
||||||
{
|
{
|
||||||
res.set(http::field::server,
|
res.set(
|
||||||
|
http::field::server,
|
||||||
std::string(BOOST_BEAST_VERSION_STRING) +
|
std::string(BOOST_BEAST_VERSION_STRING) +
|
||||||
" websocket-server-coro");
|
" websocket-server-coro");
|
||||||
}));
|
}));
|
||||||
|
|
||||||
// Accept the websocket handshake
|
// Accept the websocket handshake
|
||||||
co_await ws.async_accept();
|
co_await stream.async_accept();
|
||||||
|
|
||||||
try
|
for(;;)
|
||||||
{
|
{
|
||||||
for(;;)
|
// This buffer will hold the incoming message
|
||||||
{
|
beast::flat_buffer buffer;
|
||||||
// This buffer will hold the incoming message
|
|
||||||
beast::flat_buffer buffer;
|
|
||||||
|
|
||||||
// Read a message
|
// Read a message
|
||||||
co_await ws.async_read(buffer);
|
auto [ec, _] = co_await stream.async_read(buffer, net::as_tuple);
|
||||||
|
|
||||||
// Echo the message back
|
if(ec == websocket::error::closed)
|
||||||
ws.text(ws.got_text());
|
co_return;
|
||||||
co_await ws.async_write(buffer.data());
|
|
||||||
}
|
if(ec)
|
||||||
}
|
throw boost::system::system_error{ ec };
|
||||||
catch(const boost::system::system_error & se)
|
|
||||||
{
|
// Echo the message back
|
||||||
if (se.code() != websocket::error::closed)
|
stream.text(stream.got_text());
|
||||||
throw;
|
co_await stream.async_write(buffer.data());
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
//------------------------------------------------------------------------------
|
|
||||||
|
|
||||||
// Accepts incoming connections and launches the sessions
|
// Accepts incoming connections and launches the sessions
|
||||||
net::awaitable<void>
|
net::awaitable<void>
|
||||||
do_listen(
|
do_listen(net::ip::tcp::endpoint endpoint)
|
||||||
tcp::endpoint endpoint)
|
|
||||||
{
|
{
|
||||||
|
auto executor = co_await net::this_coro::executor;
|
||||||
// Open the acceptor
|
auto acceptor = net::ip::tcp::acceptor{ executor, endpoint };
|
||||||
auto acceptor = net::use_awaitable.as_default_on(tcp::acceptor(co_await net::this_coro::executor));
|
|
||||||
acceptor.open(endpoint.protocol());
|
|
||||||
|
|
||||||
// Allow address reuse
|
|
||||||
acceptor.set_option(net::socket_base::reuse_address(true));
|
|
||||||
|
|
||||||
// Bind to the server address
|
|
||||||
acceptor.bind(endpoint);
|
|
||||||
|
|
||||||
// Start listening for connections
|
|
||||||
acceptor.listen(net::socket_base::max_listen_connections);
|
|
||||||
|
|
||||||
for(;;)
|
for(;;)
|
||||||
boost::asio::co_spawn(
|
{
|
||||||
acceptor.get_executor(),
|
net::co_spawn(
|
||||||
do_session(stream(co_await acceptor.async_accept())),
|
executor,
|
||||||
[](std::exception_ptr e)
|
do_session(websocket::stream<beast::tcp_stream>{
|
||||||
|
co_await acceptor.async_accept() }),
|
||||||
|
[](std::exception_ptr e)
|
||||||
|
{
|
||||||
|
if(e)
|
||||||
{
|
{
|
||||||
if (e)
|
try
|
||||||
{
|
{
|
||||||
try
|
std::rethrow_exception(e);
|
||||||
{
|
|
||||||
std::rethrow_exception(e);
|
|
||||||
}
|
|
||||||
catch (std::exception &e) {
|
|
||||||
std::cerr << "Error in session: " << e.what() << "\n";
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
});
|
catch(std::exception& e)
|
||||||
|
{
|
||||||
|
std::cerr << "Error in session: " << e.what() << "\n";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
});
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
int main(int argc, char* argv[])
|
int
|
||||||
|
main(int argc, char* argv[])
|
||||||
{
|
{
|
||||||
// Check command line arguments.
|
// Check command line arguments.
|
||||||
if (argc != 4)
|
if(argc != 4)
|
||||||
{
|
{
|
||||||
std::cerr <<
|
std::cerr
|
||||||
"Usage: websocket-server-awaitable <address> <port> <threads>\n" <<
|
<< "Usage: websocket-server-awaitable <address> <port> <threads>\n"
|
||||||
"Example:\n" <<
|
<< "Example:\n"
|
||||||
" websocket-server-awaitable 0.0.0.0 8080 1\n";
|
<< " websocket-server-awaitable 0.0.0.0 8080 1\n";
|
||||||
return EXIT_FAILURE;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
auto const address = net::ip::make_address(argv[1]);
|
auto const address = net::ip::make_address(argv[1]);
|
||||||
auto const port = static_cast<unsigned short>(std::atoi(argv[2]));
|
auto const port = static_cast<unsigned short>(std::atoi(argv[2]));
|
||||||
auto const threads = std::max<int>(1, std::atoi(argv[3]));
|
auto const threads = std::max<int>(1, std::atoi(argv[3]));
|
||||||
|
|
||||||
// The io_context is required for all I/O
|
// The io_context is required for all I/O
|
||||||
net::io_context ioc(threads);
|
net::io_context ioc(threads);
|
||||||
|
|
||||||
// Spawn a listening port
|
// Spawn a listening port
|
||||||
boost::asio::co_spawn(
|
net::co_spawn(
|
||||||
ioc,
|
ioc,
|
||||||
do_listen(tcp::endpoint{address, port}),
|
do_listen(net::ip::tcp::endpoint{ address, port }),
|
||||||
[](std::exception_ptr e)
|
[](std::exception_ptr e)
|
||||||
{
|
{
|
||||||
if (e)
|
if(e)
|
||||||
try
|
{
|
||||||
{
|
try
|
||||||
std::rethrow_exception(e);
|
{
|
||||||
}
|
std::rethrow_exception(e);
|
||||||
catch(std::exception & e)
|
}
|
||||||
{
|
catch(std::exception const& e)
|
||||||
std::cerr << "Error: " << e.what() << "\n";
|
{
|
||||||
}
|
std::cerr << "Error: " << e.what() << std::endl;
|
||||||
});
|
}
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
// Run the I/O service on the requested number of threads
|
// Run the I/O service on the requested number of threads
|
||||||
std::vector<std::thread> v;
|
std::vector<std::thread> v;
|
||||||
v.reserve(threads - 1);
|
v.reserve(threads - 1);
|
||||||
for(auto i = threads - 1; i > 0; --i)
|
for(auto i = threads - 1; i > 0; --i)
|
||||||
v.emplace_back(
|
v.emplace_back([&ioc] { ioc.run(); });
|
||||||
[&ioc]
|
|
||||||
{
|
|
||||||
ioc.run();
|
|
||||||
});
|
|
||||||
ioc.run();
|
ioc.run();
|
||||||
|
|
||||||
return EXIT_SUCCESS;
|
return EXIT_SUCCESS;
|
||||||
@ -176,10 +155,11 @@ int main(int argc, char* argv[])
|
|||||||
|
|
||||||
#else
|
#else
|
||||||
|
|
||||||
int main(int, char * [])
|
int
|
||||||
|
main(int, char*[])
|
||||||
{
|
{
|
||||||
std::printf("awaitables require C++20\n");
|
std::printf("awaitables require C++20\n");
|
||||||
return 1;
|
return EXIT_FAILURE;
|
||||||
}
|
}
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
Reference in New Issue
Block a user