From 702d32b41c1c4f496dba046c2017cb5b907e55cd Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Thu, 12 Jan 2023 20:00:40 +0100
Subject: FCGI test

---
 tests/websocketserverprocess.cpp | 205 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 205 insertions(+)
 create mode 100644 tests/websocketserverprocess.cpp

(limited to 'tests/websocketserverprocess.cpp')

diff --git a/tests/websocketserverprocess.cpp b/tests/websocketserverprocess.cpp
new file mode 100644
index 0000000..89a50ee
--- /dev/null
+++ b/tests/websocketserverprocess.cpp
@@ -0,0 +1,205 @@
+#include "websocketserverprocess.h"
+
+#include <boost/test/data/dataset.hpp>
+#include <boost/test/data/monomorphic.hpp>
+#include <boost/test/data/test_case.hpp>
+
+#include <boost/algorithm/string.hpp>
+#include <boost/beast/core.hpp>
+#include <boost/beast/http.hpp>
+#include <boost/beast/websocket.hpp>
+#include <boost/beast/websocket/ssl.hpp>
+#include <boost/beast/ssl.hpp>
+#include <boost/beast/version.hpp>
+#include <boost/asio/buffer.hpp>
+#include <boost/asio/buffers_iterator.hpp>
+#include <boost/asio/connect.hpp>
+#include <boost/asio/ip/tcp.hpp>
+#include <boost/asio/ssl/error.hpp>
+#include <boost/asio/ssl/stream.hpp>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/xml_parser.hpp>
+
+#include <fmt/core.h>
+
+#include <chrono>
+#include <exception>
+#include <filesystem>
+#include <iostream>
+#include <memory>
+#include <mutex>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <thread>
+
+#include <ext/stdio_filebuf.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+
+#include <libreichwein/file.h>
+#include <libreichwein/process.h>
+
+#include "webserver.h"
+#include "response.h"
+
+#include "helper.h"
+
+using namespace std::string_literals;
+namespace fs = std::filesystem;
+namespace pt = boost::property_tree;
+using namespace boost::unit_test;
+using namespace Reichwein;
+
+WebsocketServerProcess::WebsocketServerProcess()
+{
+ // RAII pattern for shared memory allocation/deallocation
+ m_shared = std::unique_ptr<shared_data_t, std::function<void(shared_data_t*)>>(
+                            (shared_data_t*)mmap(NULL, sizeof(shared_data_t), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0),
+                            [this](shared_data_t*){munmap(m_shared.get(), sizeof(shared_data_t));});
+ start();
+}
+
+WebsocketServerProcess::~WebsocketServerProcess()
+{
+ stop();
+}
+
+void WebsocketServerProcess::do_session(boost::asio::ip::tcp::socket socket)
+{
+ try
+ {
+  // Construct the stream by moving in the socket
+  boost::beast::websocket::stream<boost::asio::ip::tcp::socket> ws{std::move(socket)};
+
+  // Set a decorator to change the Server of the handshake
+  ws.set_option(boost::beast::websocket::stream_base::decorator(
+      [](boost::beast::websocket::response_type& res)
+      {
+       res.set(boost::beast::http::field::server,
+           std::string("Reichwein.IT Test Websocket Server"));
+      }));
+
+  boost::beast::http::request_parser<boost::beast::http::string_body> parser;
+  request_type req;
+  boost::beast::flat_buffer buffer;
+
+  boost::beast::http::read(ws.next_layer(), buffer, parser);
+  req = parser.get();
+  {
+   std::lock_guard lock{m_shared->mutex};
+   strncpy(m_shared->subprotocol, std::string{req[http::field::sec_websocket_protocol]}.data(), sizeof(m_shared->subprotocol));
+   strncpy(m_shared->target, std::string{req.target()}.data(), sizeof(m_shared->target));
+  }
+
+  ws.accept(req);
+
+  for(;;)
+  {
+   boost::beast::flat_buffer buffer;
+
+   ws.read(buffer);
+
+   // Reply with <request>: <counter>
+   ws.text(ws.got_text());
+   std::string data(boost::asio::buffers_begin(buffer.data()), boost::asio::buffers_end(buffer.data()));
+   data += ": " + std::to_string(m_count++);
+   buffer.consume(buffer.size());
+   boost::beast::ostream(buffer) << data;
+   ws.write(buffer.data());
+  }
+ }
+ catch(boost::beast::system_error const& se)
+ {
+  // This indicates that the session was closed
+  if(se.code() != boost::beast::websocket::error::closed)
+      std::cerr << "Error: " << se.code().message() << std::endl;
+ }
+ catch(std::exception const& e)
+ {
+  std::cerr << "Error: " << e.what() << std::endl;
+ }
+}
+
+bool WebsocketServerProcess::is_running()
+{
+ if (m_pid == 0)
+  return false;
+
+ return Reichwein::Process::is_running(m_pid);
+}
+
+void WebsocketServerProcess::start()
+{
+ if (m_pid != 0)
+  throw std::runtime_error("Process already running, so it can't be started");
+
+ // connect stdout of new child process to stream of parent, via pipe
+ m_pid = fork();
+ if (m_pid < 0)
+  throw std::runtime_error("Fork unsuccessful.");
+
+ if (m_pid == 0) { // child process branch
+  try
+  {
+   auto const address = boost::asio::ip::make_address("::1");
+   auto const port = static_cast<unsigned short>(8765);
+
+   // The io_context is required for all I/O
+   boost::asio::io_context ioc{1};
+
+   // The acceptor receives incoming connections
+   boost::asio::ip::tcp::acceptor acceptor{ioc, {address, port}};
+   for(;;)
+   {
+    // This will receive the new connection
+    boost::asio::ip::tcp::socket socket{ioc};
+
+    // Block until we get a connection
+    acceptor.accept(socket);
+
+    // Launch the session, transferring ownership of the socket
+    std::thread(
+        &WebsocketServerProcess::do_session, this,
+        std::move(socket)).detach();
+   }
+  }
+  catch (const std::exception& e)
+  {
+   std::cerr << "Error: " << e.what() << std::endl;
+  }
+  exit(0);
+ }
+
+ wait_for_pid_listening_on(m_pid, 8765);
+}
+
+void WebsocketServerProcess::stop()
+{
+ if (!is_running())
+  throw std::runtime_error("Process not running, so it can't be stopped");
+ 
+ if (kill(m_pid, SIGTERM) != 0)
+  throw std::runtime_error("Unable to kill process");
+
+ if (int result = waitpid(m_pid, NULL, 0); result != m_pid)
+  throw std::runtime_error("waitpid returned "s + std::to_string(result));
+
+ m_pid = 0;
+}
+
+std::string WebsocketServerProcess::subprotocol()
+{
+ std::lock_guard lock{m_shared->mutex};
+ return m_shared->subprotocol;
+}
+
+std::string WebsocketServerProcess::target()
+{
+ std::lock_guard lock{m_shared->mutex};
+ return m_shared->target;
+}
+
-- 
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