Added Debian systemd service file

1 files changed, 2 insertions, 545 deletions

diff --git a/webserver.cpp b/webserver.cpp
index d2d1bee..4b6a89c 100644
--- a/webserver.cpp
+++ b/webserver.cpp
@@ -1,549 +1,6 @@
-#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();
-    }
-};
-
-//------------------------------------------------------------------------------
+#include "http.h"
 
 int main(int argc, char* argv[])
 {
-    // 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;
+ return http_server(argc, argv);
 }