summaryrefslogtreecommitdiffhomepage
diff options
context:
space:
mode:
-rw-r--r--Makefile7
-rw-r--r--TODO7
-rw-r--r--server_certificate.h124
-rw-r--r--webserver.cpp547
4 files changed, 683 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 9e69649..13d78c8 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,7 @@ CXXFLAGS=-O0 -g -D_DEBUG
CXXFLAGS+= -Wall -I.
+CXXFLAGS+= -pthread
ifeq ($(CXX),clang++-10)
CXXFLAGS+=-std=c++20 -stdlib=libc++
else
@@ -26,7 +27,8 @@ LIBS=\
-lboost_thread \
-lboost_filesystem \
-lboost_regex \
--lpthread
+-lpthread \
+-lssl -lcrypto
ifeq ($(CXX),clang++-10)
LIBS+= \
@@ -60,6 +62,9 @@ all: test-$(PROJECTNAME) $(PROJECTNAME)
test-$(PROJECTNAME): $(TESTSRC:.cpp=.o)
$(CXX) $(CXXFLAGS) $^ $(LIBS) -o $@
+$(PROJECTNAME): $(SRC:.cpp=.o)
+ $(CXX) $(CXXFLAGS) $^ $(LIBS) -o $@
+
dep: $(TESTSRC:.cpp=.d)
%.d: %.cpp
diff --git a/TODO b/TODO
new file mode 100644
index 0000000..0d4b8fa
--- /dev/null
+++ b/TODO
@@ -0,0 +1,7 @@
+Debian package
+Plugin: https://www.boost.org/doc/libs/1_72_0/doc/html/boost_dll/tutorial.html#boost_dll.tutorial.symbol_shadowing_problem__linux_
+HTTP+HTTPS: https://www.boost.org/doc/libs/1_72_0/libs/beast/doc/html/beast/examples.html#beast.examples.servers
+Config: https://www.boost.org/doc/libs/1_72_0/doc/html/property_tree/tutorial.html
+Certbot: https://certbot.eff.org/lets-encrypt/debianbuster-other
+
+
diff --git a/server_certificate.h b/server_certificate.h
new file mode 100644
index 0000000..a20110e
--- /dev/null
+++ b/server_certificate.h
@@ -0,0 +1,124 @@
+//
+// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// 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
+//
+
+#ifndef BOOST_BEAST_EXAMPLE_COMMON_SERVER_CERTIFICATE_HPP
+#define BOOST_BEAST_EXAMPLE_COMMON_SERVER_CERTIFICATE_HPP
+
+#include <boost/asio/buffer.hpp>
+#include <boost/asio/ssl/context.hpp>
+#include <cstddef>
+#include <memory>
+
+/* Load a signed certificate into the ssl context, and configure
+ the context for use with a server.
+
+ For this to work with the browser or operating system, it is
+ necessary to import the "Beast Test CA" certificate into
+ the local certificate store, browser, or operating system
+ depending on your environment Please see the documentation
+ accompanying the Beast certificate for more details.
+*/
+inline
+void
+load_server_certificate(boost::asio::ssl::context& ctx)
+{
+ /*
+ The certificate was generated from CMD.EXE on Windows 10 using:
+
+ winpty openssl dhparam -out dh.pem 2048
+ winpty openssl req -newkey rsa:2048 -nodes -keyout key.pem -x509 -days 10000 -out cert.pem -subj "//C=US\ST=CA\L=Los Angeles\O=Beast\CN=www.example.com"
+ */
+
+ std::string const cert =
+ "-----BEGIN CERTIFICATE-----\n"
+ "MIIDaDCCAlCgAwIBAgIJAO8vBu8i8exWMA0GCSqGSIb3DQEBCwUAMEkxCzAJBgNV\n"
+ "BAYTAlVTMQswCQYDVQQIDAJDQTEtMCsGA1UEBwwkTG9zIEFuZ2VsZXNPPUJlYXN0\n"
+ "Q049d3d3LmV4YW1wbGUuY29tMB4XDTE3MDUwMzE4MzkxMloXDTQ0MDkxODE4Mzkx\n"
+ "MlowSTELMAkGA1UEBhMCVVMxCzAJBgNVBAgMAkNBMS0wKwYDVQQHDCRMb3MgQW5n\n"
+ "ZWxlc089QmVhc3RDTj13d3cuZXhhbXBsZS5jb20wggEiMA0GCSqGSIb3DQEBAQUA\n"
+ "A4IBDwAwggEKAoIBAQDJ7BRKFO8fqmsEXw8v9YOVXyrQVsVbjSSGEs4Vzs4cJgcF\n"
+ "xqGitbnLIrOgiJpRAPLy5MNcAXE1strVGfdEf7xMYSZ/4wOrxUyVw/Ltgsft8m7b\n"
+ "Fu8TsCzO6XrxpnVtWk506YZ7ToTa5UjHfBi2+pWTxbpN12UhiZNUcrRsqTFW+6fO\n"
+ "9d7xm5wlaZG8cMdg0cO1bhkz45JSl3wWKIES7t3EfKePZbNlQ5hPy7Pd5JTmdGBp\n"
+ "yY8anC8u4LPbmgW0/U31PH0rRVfGcBbZsAoQw5Tc5dnb6N2GEIbq3ehSfdDHGnrv\n"
+ "enu2tOK9Qx6GEzXh3sekZkxcgh+NlIxCNxu//Dk9AgMBAAGjUzBRMB0GA1UdDgQW\n"
+ "BBTZh0N9Ne1OD7GBGJYz4PNESHuXezAfBgNVHSMEGDAWgBTZh0N9Ne1OD7GBGJYz\n"
+ "4PNESHuXezAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBCwUAA4IBAQCmTJVT\n"
+ "LH5Cru1vXtzb3N9dyolcVH82xFVwPewArchgq+CEkajOU9bnzCqvhM4CryBb4cUs\n"
+ "gqXWp85hAh55uBOqXb2yyESEleMCJEiVTwm/m26FdONvEGptsiCmF5Gxi0YRtn8N\n"
+ "V+KhrQaAyLrLdPYI7TrwAOisq2I1cD0mt+xgwuv/654Rl3IhOMx+fKWKJ9qLAiaE\n"
+ "fQyshjlPP9mYVxWOxqctUdQ8UnsUKKGEUcVrA08i1OAnVKlPFjKBvk+r7jpsTPcr\n"
+ "9pWXTO9JrYMML7d+XRSZA1n3856OqZDX4403+9FnXCvfcLZLLKTBvwwFgEFGpzjK\n"
+ "UEVbkhd5qstF6qWK\n"
+ "-----END CERTIFICATE-----\n";
+
+ std::string const key =
+ "-----BEGIN PRIVATE KEY-----\n"
+ "MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDJ7BRKFO8fqmsE\n"
+ "Xw8v9YOVXyrQVsVbjSSGEs4Vzs4cJgcFxqGitbnLIrOgiJpRAPLy5MNcAXE1strV\n"
+ "GfdEf7xMYSZ/4wOrxUyVw/Ltgsft8m7bFu8TsCzO6XrxpnVtWk506YZ7ToTa5UjH\n"
+ "fBi2+pWTxbpN12UhiZNUcrRsqTFW+6fO9d7xm5wlaZG8cMdg0cO1bhkz45JSl3wW\n"
+ "KIES7t3EfKePZbNlQ5hPy7Pd5JTmdGBpyY8anC8u4LPbmgW0/U31PH0rRVfGcBbZ\n"
+ "sAoQw5Tc5dnb6N2GEIbq3ehSfdDHGnrvenu2tOK9Qx6GEzXh3sekZkxcgh+NlIxC\n"
+ "Nxu//Dk9AgMBAAECggEBAK1gV8uETg4SdfE67f9v/5uyK0DYQH1ro4C7hNiUycTB\n"
+ "oiYDd6YOA4m4MiQVJuuGtRR5+IR3eI1zFRMFSJs4UqYChNwqQGys7CVsKpplQOW+\n"
+ "1BCqkH2HN/Ix5662Dv3mHJemLCKUON77IJKoq0/xuZ04mc9csykox6grFWB3pjXY\n"
+ "OEn9U8pt5KNldWfpfAZ7xu9WfyvthGXlhfwKEetOuHfAQv7FF6s25UIEU6Hmnwp9\n"
+ "VmYp2twfMGdztz/gfFjKOGxf92RG+FMSkyAPq/vhyB7oQWxa+vdBn6BSdsfn27Qs\n"
+ "bTvXrGe4FYcbuw4WkAKTljZX7TUegkXiwFoSps0jegECgYEA7o5AcRTZVUmmSs8W\n"
+ "PUHn89UEuDAMFVk7grG1bg8exLQSpugCykcqXt1WNrqB7x6nB+dbVANWNhSmhgCg\n"
+ "VrV941vbx8ketqZ9YInSbGPWIU/tss3r8Yx2Ct3mQpvpGC6iGHzEc/NHJP8Efvh/\n"
+ "CcUWmLjLGJYYeP5oNu5cncC3fXUCgYEA2LANATm0A6sFVGe3sSLO9un1brA4zlZE\n"
+ "Hjd3KOZnMPt73B426qUOcw5B2wIS8GJsUES0P94pKg83oyzmoUV9vJpJLjHA4qmL\n"
+ "CDAd6CjAmE5ea4dFdZwDDS8F9FntJMdPQJA9vq+JaeS+k7ds3+7oiNe+RUIHR1Sz\n"
+ "VEAKh3Xw66kCgYB7KO/2Mchesu5qku2tZJhHF4QfP5cNcos511uO3bmJ3ln+16uR\n"
+ "GRqz7Vu0V6f7dvzPJM/O2QYqV5D9f9dHzN2YgvU9+QSlUeFK9PyxPv3vJt/WP1//\n"
+ "zf+nbpaRbwLxnCnNsKSQJFpnrE166/pSZfFbmZQpNlyeIuJU8czZGQTifQKBgHXe\n"
+ "/pQGEZhVNab+bHwdFTxXdDzr+1qyrodJYLaM7uFES9InVXQ6qSuJO+WosSi2QXlA\n"
+ "hlSfwwCwGnHXAPYFWSp5Owm34tbpp0mi8wHQ+UNgjhgsE2qwnTBUvgZ3zHpPORtD\n"
+ "23KZBkTmO40bIEyIJ1IZGdWO32q79nkEBTY+v/lRAoGBAI1rbouFYPBrTYQ9kcjt\n"
+ "1yfu4JF5MvO9JrHQ9tOwkqDmNCWx9xWXbgydsn/eFtuUMULWsG3lNjfst/Esb8ch\n"
+ "k5cZd6pdJZa4/vhEwrYYSuEjMCnRb0lUsm7TsHxQrUd6Fi/mUuFU/haC0o0chLq7\n"
+ "pVOUFq5mW8p0zbtfHbjkgxyF\n"
+ "-----END PRIVATE KEY-----\n";
+
+ std::string const dh =
+ "-----BEGIN DH PARAMETERS-----\n"
+ "MIIBCAKCAQEArzQc5mpm0Fs8yahDeySj31JZlwEphUdZ9StM2D8+Fo7TMduGtSi+\n"
+ "/HRWVwHcTFAgrxVdm+dl474mOUqqaz4MpzIb6+6OVfWHbQJmXPepZKyu4LgUPvY/\n"
+ "4q3/iDMjIS0fLOu/bLuObwU5ccZmDgfhmz1GanRlTQOiYRty3FiOATWZBRh6uv4u\n"
+ "tff4A9Bm3V9tLx9S6djq31w31Gl7OQhryodW28kc16t9TvO1BzcV3HjRPwpe701X\n"
+ "oEEZdnZWANkkpR/m/pfgdmGPU66S2sXMHgsliViQWpDCYeehrvFRHEdR9NV+XJfC\n"
+ "QMUk26jPTIVTLfXmmwU0u8vUkpR7LQKkwwIBAg==\n"
+ "-----END DH PARAMETERS-----\n";
+
+ ctx.set_password_callback(
+ [](std::size_t,
+ boost::asio::ssl::context_base::password_purpose)
+ {
+ return "test";
+ });
+
+ ctx.set_options(
+ boost::asio::ssl::context::default_workarounds |
+ boost::asio::ssl::context::no_sslv2 |
+ boost::asio::ssl::context::single_dh_use);
+
+ ctx.use_certificate_chain(
+ boost::asio::buffer(cert.data(), cert.size()));
+
+ ctx.use_private_key(
+ boost::asio::buffer(key.data(), key.size()),
+ boost::asio::ssl::context::file_format::pem);
+
+ ctx.use_tmp_dh(
+ boost::asio::buffer(dh.data(), dh.size()));
+}
+
+#endif
diff --git a/webserver.cpp b/webserver.cpp
index 8927fe4..d2d1bee 100644
--- a/webserver.cpp
+++ b/webserver.cpp
@@ -1,4 +1,549 @@
+#include "server_certificate.h"
+
+#include <boost/beast/core.hpp>
+#include <boost/beast/http.hpp>
+#include <boost/beast/ssl.hpp>
+#include <boost/beast/version.hpp>
+#include <boost/asio/dispatch.hpp>
+#include <boost/asio/strand.hpp>
+#include <boost/config.hpp>
+#include <algorithm>
+#include <cstdlib>
+#include <functional>
+#include <iostream>
+#include <memory>
+#include <string>
+#include <thread>
+#include <vector>
+
+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>
+namespace ssl = boost::asio::ssl; // from <boost/asio/ssl.hpp>
+using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
+
+// Return a reasonable mime type based on the extension of a file.
+beast::string_view
+mime_type(beast::string_view path)
+{
+ using beast::iequals;
+ auto const ext = [&path]
+ {
+ auto const pos = path.rfind(".");
+ if(pos == beast::string_view::npos)
+ return beast::string_view{};
+ return path.substr(pos);
+ }();
+ if(iequals(ext, ".htm")) return "text/html";
+ if(iequals(ext, ".html")) return "text/html";
+ if(iequals(ext, ".php")) return "text/html";
+ if(iequals(ext, ".css")) return "text/css";
+ if(iequals(ext, ".txt")) return "text/plain";
+ if(iequals(ext, ".js")) return "application/javascript";
+ if(iequals(ext, ".json")) return "application/json";
+ if(iequals(ext, ".xml")) return "application/xml";
+ if(iequals(ext, ".swf")) return "application/x-shockwave-flash";
+ if(iequals(ext, ".flv")) return "video/x-flv";
+ if(iequals(ext, ".png")) return "image/png";
+ if(iequals(ext, ".jpe")) return "image/jpeg";
+ if(iequals(ext, ".jpeg")) return "image/jpeg";
+ if(iequals(ext, ".jpg")) return "image/jpeg";
+ if(iequals(ext, ".gif")) return "image/gif";
+ if(iequals(ext, ".bmp")) return "image/bmp";
+ if(iequals(ext, ".ico")) return "image/vnd.microsoft.icon";
+ if(iequals(ext, ".tiff")) return "image/tiff";
+ if(iequals(ext, ".tif")) return "image/tiff";
+ if(iequals(ext, ".svg")) return "image/svg+xml";
+ if(iequals(ext, ".svgz")) return "image/svg+xml";
+ return "application/text";
+}
+
+// Append an HTTP rel-path to a local filesystem path.
+// The returned path is normalized for the platform.
+std::string
+path_cat(
+ beast::string_view base,
+ beast::string_view path)
+{
+ if(base.empty())
+ return std::string(path);
+ std::string result(base);
+#ifdef BOOST_MSVC
+ char constexpr path_separator = '\\';
+ if(result.back() == path_separator)
+ result.resize(result.size() - 1);
+ result.append(path.data(), path.size());
+ for(auto& c : result)
+ if(c == '/')
+ c = path_separator;
+#else
+ char constexpr path_separator = '/';
+ if(result.back() == path_separator)
+ result.resize(result.size() - 1);
+ result.append(path.data(), path.size());
+#endif
+ return result;
+}
+
+// This function produces an HTTP response for the given
+// request. The type of the response object depends on the
+// contents of the request, so the interface requires the
+// caller to pass a generic lambda for receiving the response.
+template<
+ class Body, class Allocator,
+ class Send>
+void
+handle_request(
+ beast::string_view doc_root,
+ http::request<Body, http::basic_fields<Allocator>>&& req,
+ Send&& send)
+{
+ // Returns a bad request response
+ auto const bad_request =
+ [&req](beast::string_view why)
+ {
+ http::response<http::string_body> res{http::status::bad_request, req.version()};
+ res.set(http::field::server, BOOST_BEAST_VERSION_STRING);
+ res.set(http::field::content_type, "text/html");
+ res.keep_alive(req.keep_alive());
+ res.body() = std::string(why);
+ res.prepare_payload();
+ return res;
+ };
+
+ // Returns a not found response
+ auto const not_found =
+ [&req](beast::string_view target)
+ {
+ http::response<http::string_body> res{http::status::not_found, req.version()};
+ res.set(http::field::server, BOOST_BEAST_VERSION_STRING);
+ res.set(http::field::content_type, "text/html");
+ res.keep_alive(req.keep_alive());
+ res.body() = "The resource '" + std::string(target) + "' was not found.";
+ res.prepare_payload();
+ return res;
+ };
+
+ // Returns a server error response
+ auto const server_error =
+ [&req](beast::string_view what)
+ {
+ http::response<http::string_body> res{http::status::internal_server_error, req.version()};
+ res.set(http::field::server, BOOST_BEAST_VERSION_STRING);
+ res.set(http::field::content_type, "text/html");
+ res.keep_alive(req.keep_alive());
+ res.body() = "An error occurred: '" + std::string(what) + "'";
+ res.prepare_payload();
+ return res;
+ };
+
+ // Make sure we can handle the method
+ if( req.method() != http::verb::get &&
+ req.method() != http::verb::head)
+ return send(bad_request("Unknown HTTP-method"));
+
+ // Request path must be absolute and not contain "..".
+ if( req.target().empty() ||
+ req.target()[0] != '/' ||
+ req.target().find("..") != beast::string_view::npos)
+ return send(bad_request("Illegal request-target"));
+
+ // Build the path to the requested file
+ std::string path = path_cat(doc_root, req.target());
+ if(req.target().back() == '/')
+ path.append("index.html");
+
+ // Attempt to open the file
+ beast::error_code ec;
+ http::file_body::value_type body;
+ body.open(path.c_str(), beast::file_mode::scan, ec);
+
+ // Handle the case where the file doesn't exist
+ if(ec == beast::errc::no_such_file_or_directory)
+ return send(not_found(req.target()));
+
+ // Handle an unknown error
+ if(ec)
+ return send(server_error(ec.message()));
+
+ // Cache the size since we need it after the move
+ auto const size = body.size();
+
+ // Respond to HEAD request
+ if(req.method() == http::verb::head)
+ {
+ http::response<http::empty_body> res{http::status::ok, req.version()};
+ res.set(http::field::server, BOOST_BEAST_VERSION_STRING);
+ res.set(http::field::content_type, mime_type(path));
+ res.content_length(size);
+ res.keep_alive(req.keep_alive());
+ return send(std::move(res));
+ }
+
+ // Respond to GET request
+ http::response<http::file_body> res{
+ std::piecewise_construct,
+ std::make_tuple(std::move(body)),
+ std::make_tuple(http::status::ok, req.version())};
+ res.set(http::field::server, BOOST_BEAST_VERSION_STRING);
+ res.set(http::field::content_type, mime_type(path));
+ res.content_length(size);
+ res.keep_alive(req.keep_alive());
+ return send(std::move(res));
+}
+
+//------------------------------------------------------------------------------
+
+// Report a failure
+void
+fail(beast::error_code ec, char const* what)
+{
+ // ssl::error::stream_truncated, also known as an SSL "short read",
+ // indicates the peer closed the connection without performing the
+ // required closing handshake (for example, Google does this to
+ // improve performance). Generally this can be a security issue,
+ // but if your communication protocol is self-terminated (as
+ // it is with both HTTP and WebSocket) then you may simply
+ // ignore the lack of close_notify.
+ //
+ // https://github.com/boostorg/beast/issues/38
+ //
+ // https://security.stackexchange.com/questions/91435/how-to-handle-a-malicious-ssl-tls-shutdown
+ //
+ // When a short read would cut off the end of an HTTP message,
+ // Beast returns the error beast::http::error::partial_message.
+ // Therefore, if we see a short read here, it has occurred
+ // after the message has been completed, so it is safe to ignore it.
+
+ if(ec == net::ssl::error::stream_truncated)
+ return;
+
+ std::cerr << what << ": " << ec.message() << "\n";
+}
+
+// Handles an HTTP server connection
+class session : public std::enable_shared_from_this<session>
+{
+ // This is the C++11 equivalent of a generic lambda.
+ // The function object is used to send an HTTP message.
+ struct send_lambda
+ {
+ session& self_;
+
+ explicit
+ send_lambda(session& self)
+ : self_(self)
+ {
+ }
+
+ template<bool isRequest, class Body, class Fields>
+ void
+ operator()(http::message<isRequest, Body, Fields>&& msg) const
+ {
+ // The lifetime of the message has to extend
+ // for the duration of the async operation so
+ // we use a shared_ptr to manage it.
+ auto sp = std::make_shared<
+ http::message<isRequest, Body, Fields>>(std::move(msg));
+
+ // Store a type-erased version of the shared
+ // pointer in the class to keep it alive.
+ self_.res_ = sp;
+
+ // Write the response
+ http::async_write(
+ self_.stream_,
+ *sp,
+ beast::bind_front_handler(
+ &session::on_write,
+ self_.shared_from_this(),
+ sp->need_eof()));
+ }
+ };
+
+ beast::ssl_stream<beast::tcp_stream> stream_;
+ beast::flat_buffer buffer_;
+ std::shared_ptr<std::string const> doc_root_;
+ http::request<http::string_body> req_;
+ std::shared_ptr<void> res_;
+ send_lambda lambda_;
+
+public:
+ // Take ownership of the socket
+ explicit
+ session(
+ tcp::socket&& socket,
+ ssl::context& ctx,
+ std::shared_ptr<std::string const> const& doc_root)
+ : stream_(std::move(socket), ctx)
+ , doc_root_(doc_root)
+ , lambda_(*this)
+ {
+ }
+
+ // Start the asynchronous operation
+ void
+ run()
+ {
+ // We need to be executing within a strand to perform async operations
+ // on the I/O objects in this session. Although not strictly necessary
+ // for single-threaded contexts, this example code is written to be
+ // thread-safe by default.
+ net::dispatch(
+ stream_.get_executor(),
+ beast::bind_front_handler(
+ &session::on_run,
+ shared_from_this()));
+ }
+
+ void
+ on_run()
+ {
+ // Set the timeout.
+ beast::get_lowest_layer(stream_).expires_after(
+ std::chrono::seconds(30));
+
+ // Perform the SSL handshake
+ stream_.async_handshake(
+ ssl::stream_base::server,
+ beast::bind_front_handler(
+ &session::on_handshake,
+ shared_from_this()));
+ }
+
+ void
+ on_handshake(beast::error_code ec)
+ {
+ if(ec)
+ return fail(ec, "handshake");
+
+ do_read();
+ }
+
+ void
+ do_read()
+ {
+ // Make the request empty before reading,
+ // otherwise the operation behavior is undefined.
+ req_ = {};
+
+ // Set the timeout.
+ beast::get_lowest_layer(stream_).expires_after(std::chrono::seconds(30));
+
+ // Read a request
+ http::async_read(stream_, buffer_, req_,
+ 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);
+
+ // This means they closed the connection
+ if(ec == http::error::end_of_stream)
+ return do_close();
+
+ if(ec)
+ return fail(ec, "read");
+
+ // Send the response
+ handle_request(*doc_root_, std::move(req_), lambda_);
+ }
+
+ void
+ on_write(
+ bool close,
+ beast::error_code ec,
+ std::size_t bytes_transferred)
+ {
+ boost::ignore_unused(bytes_transferred);
+
+ if(ec)
+ return fail(ec, "write");
+
+ if(close)
+ {
+ // This means we should close the connection, usually because
+ // the response indicated the "Connection: close" semantic.
+ return do_close();
+ }
+
+ // We're done with the response so delete it
+ res_ = nullptr;
+
+ // Read another request
+ do_read();
+ }
+
+ void
+ do_close()
+ {
+ // Set the timeout.
+ beast::get_lowest_layer(stream_).expires_after(std::chrono::seconds(30));
+
+ // Perform the SSL shutdown
+ stream_.async_shutdown(
+ beast::bind_front_handler(
+ &session::on_shutdown,
+ shared_from_this()));
+ }
+
+ void
+ on_shutdown(beast::error_code ec)
+ {
+ if(ec)
+ return fail(ec, "shutdown");
+
+ // At this point the connection is closed gracefully
+ }
+};
+
+//------------------------------------------------------------------------------
+
+// Accepts incoming connections and launches the sessions
+class listener : public std::enable_shared_from_this<listener>
+{
+ net::io_context& ioc_;
+ ssl::context& ctx_;
+ tcp::acceptor acceptor_;
+ std::shared_ptr<std::string const> doc_root_;
+
+public:
+ listener(
+ net::io_context& ioc,
+ ssl::context& ctx,
+ tcp::endpoint endpoint,
+ std::shared_ptr<std::string const> const& doc_root)
+ : ioc_(ioc)
+ , ctx_(ctx)
+ , acceptor_(ioc)
+ , doc_root_(doc_root)
+ {
+ beast::error_code ec;
+
+ // Open the acceptor
+ acceptor_.open(endpoint.protocol(), ec);
+ if(ec)
+ {
+ fail(ec, "open");
+ return;
+ }
+
+ // Allow address reuse
+ acceptor_.set_option(net::socket_base::reuse_address(true), ec);
+ if(ec)
+ {
+ fail(ec, "set_option");
+ return;
+ }
+
+ // Bind to the server address
+ acceptor_.bind(endpoint, ec);
+ if(ec)
+ {
+ fail(ec, "bind");
+ return;
+ }
+
+ // Start listening for connections
+ acceptor_.listen(
+ net::socket_base::max_listen_connections, ec);
+ if(ec)
+ {
+ fail(ec, "listen");
+ return;
+ }
+ }
+
+ // Start accepting incoming connections
+ void
+ run()
+ {
+ do_accept();
+ }
+
+private:
+ void
+ do_accept()
+ {
+ // The new connection gets its own strand
+ acceptor_.async_accept(
+ net::make_strand(ioc_),
+ beast::bind_front_handler(
+ &listener::on_accept,
+ shared_from_this()));
+ }
+
+ void
+ on_accept(beast::error_code ec, tcp::socket socket)
+ {
+ if(ec)
+ {
+ fail(ec, "accept");
+ }
+ else
+ {
+ // Create the session and run it
+ std::make_shared<session>(
+ std::move(socket),
+ ctx_,
+ doc_root_)->run();
+ }
+
+ // Accept another connection
+ do_accept();
+ }
+};
+
+//------------------------------------------------------------------------------
+
int main(int argc, char* argv[])
{
- return 0;
+ // Check command line arguments.
+ if (argc != 5)
+ {
+ std::cerr <<
+ "Usage: http-server-async-ssl <address> <port> <doc_root> <threads>\n" <<
+ "Example:\n" <<
+ " http-server-async-ssl 0.0.0.0 8080 . 1\n";
+ return EXIT_FAILURE;
+ }
+ auto const address = net::ip::make_address(argv[1]);
+ auto const port = static_cast<unsigned short>(std::atoi(argv[2]));
+ auto const doc_root = std::make_shared<std::string>(argv[3]);
+ auto const threads = std::max<int>(1, std::atoi(argv[4]));
+
+ // The io_context is required for all I/O
+ net::io_context ioc{threads};
+
+ // The SSL context is required, and holds certificates
+ ssl::context ctx{ssl::context::tlsv12};
+
+ // This holds the self-signed certificate used by the server
+ load_server_certificate(ctx);
+
+ // Create and launch a listening port
+ std::make_shared<listener>(
+ ioc,
+ ctx,
+ tcp::endpoint{address, port},
+ doc_root)->run();
+
+ // Run the I/O service on the requested number of threads
+ std::vector<std::thread> v;
+ v.reserve(threads - 1);
+ for(auto i = threads - 1; i > 0; --i)
+ v.emplace_back(
+ [&ioc]
+ {
+ ioc.run();
+ });
+ ioc.run();
+
+ return EXIT_SUCCESS;
}