Added integration tests, simpler implementation which uses task pool.

integration-tests/http1-basic/http1-test.d

@@ -24,7 +24,7 @@ int main() {
         .build();
     configureLoggingProvider(loggingProvider);
 
-    HttpTransport transport = new Http1Transport(HttpRequestHandler.of(&handleRequest));
+    HttpTransport transport = new TaskPoolHttp1Transport(HttpRequestHandler.of(&handleRequest));
     Thread thread = transport.startInNewThread();
     scope(exit) {
         transport.stop();

integration-tests/http1-speed-test/.gitignore

@@ -0,0 +1 @@
+http1-speed-test

integration-tests/http1-speed-test/http1-speed-test.d

@@ -1,6 +1,28 @@
+/+ dub.sdl:
+    dependency "handy-http-transport" path="../../"
++/
 module integration_tests.http1_speed_test;
 
+import handy_http_primitives;
+import handy_http_transport;
+import slf4d;
+import slf4d.default_provider;
 
 void main() {
-    
+    auto loggingProvider = DefaultProvider.builder()
+        .withRootLoggingLevel(Levels.ERROR)
+        .withConsoleSerializer(true, 48)
+        .build();
+    configureLoggingProvider(loggingProvider);
+    HttpTransport transport;
+    transport = new TaskPoolHttp1Transport(HttpRequestHandler.of(
+        (ref ServerHttpRequest request, ref ServerHttpResponse response) {
+            if (request.method == HttpMethod.DELETE) {
+                transport.stop();
+            }
+            response.headers.add("Content-Type", "text/plain");
+            response.headers.add("Content-Length", "13");
+            response.outputStream.writeToStream(cast(ubyte[]) "Hello, world!");
+        }));
+    transport.start();
 }

integration-tests/run_all.sh

@@ -7,5 +7,8 @@ set -e -o pipefail
 cd http1-basic
 dub build --single http1-test.d
 ./http1-test
-
 cd ..
+
+# cd http1-speed-test
+# dub build --single --build=release http1-speed-test.d
+

source/handy_http_transport/http1/epoll.d

@@ -0,0 +1,125 @@
+module handy_http_transport.http1.epoll;
+
+import core.sys.posix.sys.socket;
+import core.sys.linux.epoll;
+import core.sys.posix.netinet.in_;
+import core.sys.posix.fcntl;
+import core.sys.posix.unistd;
+
+import core.stdc.errno;
+
+extern(C) {
+    int accept4(int sockfd, sockaddr *addr, socklen_t *addrlen, int flags);
+}
+
+import handy_http_transport.interfaces;
+import slf4d;
+
+class Http1EpollTransport : HttpTransport {
+    private immutable ushort port;
+
+    this(ushort port) {
+        this.port = port;
+    }
+
+    void start() {
+
+        // Create the server socket.
+        enum SOCK_NONBLOCK = 0x4000;
+        int listenFd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
+        sockaddr_in serverAddress;
+        serverAddress.sin_family = AF_INET;
+        serverAddress.sin_port = htons(port);
+        serverAddress.sin_addr.s_addr = INADDR_ANY;
+
+        if (bind(listenFd, cast(sockaddr*) &serverAddress, serverAddress.sizeof) == -1) {
+            errorF!"Failed to bind socket: %d"(errno);
+            close(listenFd);
+            return;
+        }
+
+        if (listen(listenFd, SOMAXCONN) == -1) {
+            errorF!"Failed to listen on socket: %d"(errno);
+            close(listenFd);
+            return;
+        }
+
+
+        int epollFd = epoll_create1(0);
+        if (epollFd == -1) {
+            errorF!"Failed to create epoll instance: %d"(errno);
+            return;
+        }
+
+        epoll_event event;
+        epoll_event[64] events;
+        event.events = EPOLLIN | EPOLLET;
+        event.data.fd = listenFd;
+        if (epoll_ctl(epollFd, EPOLL_CTL_ADD, listenFd, &event) == -1) {
+            errorF!"Failed to add listen socket to epoll: %d"(errno);
+            close(listenFd);
+            close(epollFd);
+            return;
+        }
+
+        infoF!"Server listening on port %d."(port);
+
+        while (true) {
+            int eventCount = epoll_wait(epollFd, &event, 64, 5000);
+            if (eventCount == -1) {
+                errorF!"Epoll wait failed: %d"(errno);
+                break;
+            }
+
+            for (int i = 0; i < eventCount; i++) {
+                if (events[i].data.fd == listenFd) {
+                    // New incoming connection.
+                    while (true) {
+                        sockaddr_in clientAddress;
+                        socklen_t clientAddressLength = clientAddress.sizeof;
+                        int clientFd = accept4(
+                            listenFd,
+                            cast(sockaddr*) &clientAddress,
+                            &clientAddressLength,
+                            SOCK_NONBLOCK
+                        );
+                        if (clientFd == -1) {
+                            if (errno == EAGAIN || errno == EWOULDBLOCK) {
+                                // No more connections to accept.
+                                break;
+                            } else {
+                                errorF!"Failed to accept connection: %d"(errno);
+                                break;
+                            }
+                        }
+
+                        // Add the client socket to epoll's listening list.
+                        event.events = EPOLLIN | EPOLLET;
+                        event.data.fd = clientFd;
+                        if (epoll_ctl(epollFd, EPOLL_CTL_ADD, clientFd, &event) == -1) {
+                            errorF!"Failed to add client socket to epoll: %d"(errno);
+                            close(clientFd);
+                        }
+
+                        infoF!"Accepted new connection from %s:%d."(
+                            inet_ntoa(clientAddress.sin_addr),
+                            ntohs(clientAddress.sin_port)
+                        );
+                    }
+                } else {
+                    // Event on an existing client socket.
+
+                    int clientFd = events[i].data.fd;
+
+                    if (events[i].events & EPOLLIN) {
+                        
+                    }
+                }
+            }
+        }
+    }
+
+    void stop() {
+
+    }
+}

source/handy_http_transport/http1/package.d

@@ -4,3 +4,4 @@
 module handy_http_transport.http1;
 
 public import handy_http_transport.http1.transport;
+public import handy_http_transport.http1.task_pool;

source/handy_http_transport/http1/task_pool.d

@@ -0,0 +1,49 @@
+module handy_http_transport.http1.task_pool;
+
+import std.socket;
+import std.parallelism;
+
+import handy_http_transport.http1.transport;
+import handy_http_primitives;
+import slf4d;
+
+/**
+ * An implementation of Http1Transport which uses D's standard library
+ * parallelization, where each incoming client request is turned into a task
+ * and submitted to the standard task pool.
+ */
+class TaskPoolHttp1Transport : Http1Transport {
+    this(HttpRequestHandler requestHandler, ushort port = 8080) {
+        super(requestHandler, port);
+    }
+
+    override void runServer() {
+        Socket serverSocket = new TcpSocket();
+        serverSocket.setOption(SocketOptionLevel.SOCKET, SocketOption.REUSEADDR, 1);
+        serverSocket.bind(new InternetAddress("127.0.0.1", port));
+        serverSocket.listen(1024);
+
+        while (super.isRunning) {
+            try {
+                Socket clientSocket = serverSocket.accept();
+                auto t = task!handleClient(clientSocket, requestHandler);
+                taskPool().put(t);
+            } catch (SocketAcceptException e) {
+                warn("Failed to accept socket connection.", e);
+            }
+        }
+        serverSocket.close();
+    }
+
+    override void stop() {
+        super.stop();
+        // Send a dummy request to cause the server's blocking accept() call to end.
+        try {
+            Socket dummySocket = new TcpSocket(new InternetAddress("127.0.0.1", port));
+            dummySocket.shutdown(SocketShutdown.BOTH);
+            dummySocket.close();
+        } catch (SocketOSException e) {
+            warn("Failed to send empty request to stop server.", e);
+        }
+    }
+}

source/handy_http_transport/http1/transport.d

@@ -1,6 +1,7 @@
 module handy_http_transport.http1.transport;
 
 import std.socket;
+import core.atomic : atomicStore, atomicLoad;
 
 import handy_http_transport.interfaces;
 import handy_http_transport.helpers;
@@ -14,73 +15,33 @@ import slf4d;
 import photon;
 
 /**
- * The HTTP/1.1 transport protocol implementation, using Dimitry Olshansky's
- * Photon fiber scheduling library for concurrency.
+ * Base class for HTTP/1.1 transport, where different subclasses can define
+ * how the actual socket communication works (threadpool / epoll/ etc).
  */
-class Http1Transport : HttpTransport {
-    private Socket serverSocket;
-    private HttpRequestHandler requestHandler;
-    private const ushort port;
+abstract class Http1Transport : HttpTransport {
+    protected HttpRequestHandler requestHandler;
+    protected immutable ushort port;
     private bool running = false;
 
-    /**
-     * Constructs a new Http1Transport server instance.
-     * Params:
-     *   requestHandler = The request handler to use for all requests.
-     *   port = The port to bind to.
-     */
     this(HttpRequestHandler requestHandler, ushort port = 8080) {
         assert(requestHandler !is null);
-        this.serverSocket = new TcpSocket();
         this.requestHandler = requestHandler;
         this.port = port;
     }
 
-    /**
-     * Starts the server. Internally, this starts the Photon event loop and
-     * accepts incoming connections in a separate fiber. Then, clients are
-     * handled in their own separate fiber (think "coroutine").
-     */
+    bool isRunning() {
+        return atomicLoad(running);
+    }
+
     void start() {
-        debugF!"Starting server on port %d."(port);
-        startloop();
-        go(() => runServer());
-        runFibers();
+        atomicStore(running, true);
+        runServer();
     }
 
-    /**
-     * Stops the server. This will mark the server as no longer running, so
-     * no more connections will be accepted.
-     */
+    protected abstract void runServer();
+
     void stop() {
-        debugF!"Stopping server on port %d."(port);
-        this.running = false;
-        // Send a dummy request to cause the server's blocking accept() call to end.
-        try {
-            Socket dummySocket = new TcpSocket(this.serverSocket.localAddress());
-            dummySocket.shutdown(SocketShutdown.BOTH);
-            dummySocket.close();
-        } catch (SocketOSException e) {
-            warn("Failed to send empty request to stop server.", e);
-        }
-    }
-
-    private void runServer() {
-        this.running = true;
-        serverSocket.setOption(SocketOptionLevel.SOCKET, SocketOption.REUSEADDR, 1);
-        serverSocket.bind(new InternetAddress("127.0.0.1", port));
-        traceF!"Bound to %s."(serverSocket.localAddress().toString());
-        serverSocket.listen(100);
-        while (running) {
-            try {
-                Socket clientSocket = serverSocket.accept();
-                go(() => handleClient(clientSocket, requestHandler));
-            } catch (SocketAcceptException e) {
-                warn("Failed to accept socket connection.", e);
-            }
-        }
-        this.serverSocket.shutdown(SocketShutdown.BOTH);
-        this.serverSocket.close();
+        atomicStore(running, false);
     }
 }