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src/server.h

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+///
+/// Copyright 2015 Oliver Giles
+///
+/// This file is part of Laminar
+///
+/// Laminar is free software: you can redistribute it and/or modify
+/// it under the terms of the GNU General Public License as published by
+/// the Free Software Foundation, either version 3 of the License, or
+/// (at your option) any later version.
+///
+/// Laminaris distributed in the hope that it will be useful,
+/// but WITHOUT ANY WARRANTY; without even the implied warranty of
+/// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/// GNU General Public License for more details.
+///
+/// You should have received a copy of the GNU General Public License
+/// along with Laminar.  If not, see <http://www.gnu.org/licenses/>
+///
+#ifndef _LAMINAR_SERVER_H_
+#define _LAMINAR_SERVER_H_
+
+#include <kj/async-io.h>
+#include <capnp/message.h>
+#include <capnp/capability.h>
+#include <functional>
+
+struct LaminarInterface;
+
+// This class abstracts the HTTP/Websockets and Cap'n Proto RPC interfaces.
+// It also manages the program's asynchronous event loop
+class Server final : public kj::TaskSet::ErrorHandler {
+public:
+    // Initializes the server with a LaminarInterface to handle requests from
+    // HTTP/Websocket or RPC clients and bind addresses for each of those
+    // interfaces. See the documentation for kj::AsyncIoProvider::getNetwork
+    // for a description of the address format
+    Server(LaminarInterface& li, kj::StringPtr rpcBindAddress, kj::StringPtr httpBindAddress);
+    ~Server();
+    void start();
+    void stop();
+    void addProcess(int fd, std::function<void(char*,size_t)> readCb, std::function<void()> cb);
+
+private:
+    void acceptHttpClient(kj::Own<kj::ConnectionReceiver>&& listener);
+    void acceptRpcClient(kj::Own<kj::ConnectionReceiver>&& listener);
+    kj::Promise<void> handleProcessOutput(kj::AsyncInputStream* stream, std::function<void(char*,size_t)> readCb);
+
+    void taskFailed(kj::Exception&& exception) override {
+        kj::throwFatalException(kj::mv(exception));
+    }
+
+private:
+    int efd;
+    capnp::Capability::Client rpcInterface;
+    struct WebsocketConnection;
+    struct HttpImpl;
+    HttpImpl* httpInterface;
+    kj::AsyncIoContext ioContext;
+    kj::TaskSet tasks;
+};
+
+#endif // _LAMINAR_SERVER_H_