Refactor DaemonCommand

[signal-cli] / src / main / java / org / asamk / signal / http / HttpServerHandler.java

diff --git a/src/main/java/org/asamk/signal/http/HttpServerHandler.java b/src/main/java/org/asamk/signal/http/HttpServerHandler.java
index a5213df7a0e80f71dea2a8798946dfe6f39d5347..c9c8fa16bfe604d9cc19af567383dcc968eac4a6 100644 (file)
--- a/src/main/java/org/asamk/signal/http/HttpServerHandler.java
+++ b/src/main/java/org/asamk/signal/http/HttpServerHandler.java
@@ -5,49 +5,82 @@ import com.sun.net.httpserver.HttpExchange;
 import com.sun.net.httpserver.HttpServer;
 
 import org.asamk.signal.commands.Commands;
 import com.sun.net.httpserver.HttpServer;
 
 import org.asamk.signal.commands.Commands;

+import org.asamk.signal.json.JsonReceiveMessageHandler;

 import org.asamk.signal.jsonrpc.JsonRpcReader;
 import org.asamk.signal.jsonrpc.JsonRpcResponse;
 import org.asamk.signal.jsonrpc.JsonRpcSender;
 import org.asamk.signal.jsonrpc.SignalJsonRpcCommandHandler;
 import org.asamk.signal.manager.Manager;
 import org.asamk.signal.manager.MultiAccountManager;
 import org.asamk.signal.jsonrpc.JsonRpcReader;
 import org.asamk.signal.jsonrpc.JsonRpcResponse;
 import org.asamk.signal.jsonrpc.JsonRpcSender;
 import org.asamk.signal.jsonrpc.SignalJsonRpcCommandHandler;
 import org.asamk.signal.manager.Manager;
 import org.asamk.signal.manager.MultiAccountManager;

+import org.asamk.signal.manager.api.Pair;

 import org.asamk.signal.util.Util;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import org.asamk.signal.util.Util;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 import java.net.InetSocketAddress;

+import java.util.List;
+import java.util.Map;

 import java.util.concurrent.Executors;
 import java.util.concurrent.Executors;

+import java.util.concurrent.atomic.AtomicBoolean;

 
 

-public class HttpServerHandler {
+public class HttpServerHandler implements AutoCloseable {

 
 

-    private final static Logger logger = LoggerFactory.getLogger(HttpServerHandler.class);
+    private static final Logger logger = LoggerFactory.getLogger(HttpServerHandler.class);

 
     private final ObjectMapper objectMapper = Util.createJsonObjectMapper();
 
     private final InetSocketAddress address;
 
     private final SignalJsonRpcCommandHandler commandHandler;
 
     private final ObjectMapper objectMapper = Util.createJsonObjectMapper();
 
     private final InetSocketAddress address;
 
     private final SignalJsonRpcCommandHandler commandHandler;

+    private final MultiAccountManager c;
+    private final Manager m;
+    private HttpServer server;
+    private final AtomicBoolean shutdown = new AtomicBoolean(false);

 
     public HttpServerHandler(final InetSocketAddress address, final Manager m) {
         this.address = address;
         commandHandler = new SignalJsonRpcCommandHandler(m, Commands::getCommand);
 
     public HttpServerHandler(final InetSocketAddress address, final Manager m) {
         this.address = address;
         commandHandler = new SignalJsonRpcCommandHandler(m, Commands::getCommand);

+        this.c = null;
+        this.m = m;

     }
 
     public HttpServerHandler(final InetSocketAddress address, final MultiAccountManager c) {
         this.address = address;
         commandHandler = new SignalJsonRpcCommandHandler(c, Commands::getCommand);
     }
 
     public HttpServerHandler(final InetSocketAddress address, final MultiAccountManager c) {
         this.address = address;
         commandHandler = new SignalJsonRpcCommandHandler(c, Commands::getCommand);

+        this.c = c;
+        this.m = null;

     }
 
     public void init() throws IOException {
     }
 
     public void init() throws IOException {

-        logger.info("Starting server on " + address.toString());
+        if (server != null) {
+            throw new AssertionError("HttpServerHandler already initialized");
+        }
+        logger.debug("Starting HTTP server on {}", address);

 
 

-        final var server = HttpServer.create(address, 0);
-        server.setExecutor(Executors.newFixedThreadPool(10));
+        server = HttpServer.create(address, 0);
+        server.setExecutor(Executors.newCachedThreadPool());

 
         server.createContext("/api/v1/rpc", this::handleRpcEndpoint);
 
         server.createContext("/api/v1/rpc", this::handleRpcEndpoint);

+        server.createContext("/api/v1/events", this::handleEventsEndpoint);
+        server.createContext("/api/v1/check", this::handleCheckEndpoint);

 
         server.start();
 
         server.start();

+        logger.info("Started HTTP server on {}", address);
+    }
+
+    @Override
+    public void close() {
+        if (server != null) {
+            shutdown.set(true);
+            synchronized (this) {
+                this.notifyAll();
+            }
+            // Increase this delay when https://bugs.openjdk.org/browse/JDK-8304065 is fixed
+            server.stop(2);
+            server = null;
+            shutdown.set(false);
+        }

     }
 
     private void sendResponse(int status, Object response, HttpExchange httpExchange) throws IOException {
     }
 
     private void sendResponse(int status, Object response, HttpExchange httpExchange) throws IOException {


@@ -66,12 +99,17 @@ public class HttpServerHandler {
     }
 
     private void handleRpcEndpoint(HttpExchange httpExchange) throws IOException {
     }
 
     private void handleRpcEndpoint(HttpExchange httpExchange) throws IOException {

+        if (!"/api/v1/rpc".equals(httpExchange.getRequestURI().getPath())) {
+            sendResponse(404, null, httpExchange);
+            return;
+        }

         if (!"POST".equals(httpExchange.getRequestMethod())) {
             sendResponse(405, null, httpExchange);
             return;
         }
 
         if (!"POST".equals(httpExchange.getRequestMethod())) {
             sendResponse(405, null, httpExchange);
             return;
         }
 

-        if (!"application/json".equals(httpExchange.getRequestHeaders().getFirst("Content-Type"))) {
+        final var contentType = httpExchange.getRequestHeaders().getFirst("Content-Type");
+        if (contentType == null || !contentType.startsWith("application/json")) {

             sendResponse(415, null, httpExchange);
             return;
         }
             sendResponse(415, null, httpExchange);
             return;
         }


@@ -106,4 +144,125 @@ public class HttpServerHandler {
                     httpExchange);
         }
     }
                     httpExchange);
         }
     }

+
+    private void handleEventsEndpoint(HttpExchange httpExchange) throws IOException {
+        if (!"/api/v1/events".equals(httpExchange.getRequestURI().getPath())) {
+            sendResponse(404, null, httpExchange);
+            return;
+        }
+        if (!"GET".equals(httpExchange.getRequestMethod())) {
+            sendResponse(405, null, httpExchange);
+            return;
+        }
+
+        try {
+            final var queryString = httpExchange.getRequestURI().getQuery();
+            final var query = queryString == null ? Map.<String, String>of() : Util.getQueryMap(queryString);
+
+            List<Manager> managers = getManagerFromQuery(query);
+            if (managers == null) {
+                sendResponse(400, null, httpExchange);
+                return;
+            }
+
+            httpExchange.getResponseHeaders().add("Content-Type", "text/event-stream");
+            httpExchange.sendResponseHeaders(200, 0);
+            final var sender = new ServerSentEventSender(httpExchange.getResponseBody());
+
+            final var shouldStop = new AtomicBoolean(false);
+            final var handlers = subscribeReceiveHandlers(managers, sender, () -> {
+                shouldStop.set(true);
+                synchronized (this) {
+                    this.notifyAll();
+                }
+            });
+
+            try {
+                while (true) {
+                    synchronized (this) {
+                        wait(15_000);
+                    }
+                    if (shouldStop.get() || shutdown.get()) {
+                        break;
+                    }
+
+                    try {
+                        sender.sendKeepAlive();
+                    } catch (IOException e) {
+                        break;
+                    }
+                }
+            } finally {
+                for (final var pair : handlers) {
+                    unsubscribeReceiveHandler(pair);
+                }
+                try {
+                    httpExchange.getResponseBody().close();
+                } catch (IOException ignored) {
+                }
+            }
+        } catch (Throwable aEx) {
+            logger.error("Failed to process request.", aEx);
+            sendResponse(500, null, httpExchange);
+        }
+    }
+
+    private void handleCheckEndpoint(HttpExchange httpExchange) throws IOException {
+        if (!"/api/v1/check".equals(httpExchange.getRequestURI().getPath())) {
+            sendResponse(404, null, httpExchange);
+            return;
+        }
+        if (!"GET".equals(httpExchange.getRequestMethod())) {
+            sendResponse(405, null, httpExchange);
+            return;
+        }
+
+        sendResponse(200, null, httpExchange);
+    }
+
+    private List<Manager> getManagerFromQuery(final Map<String, String> query) {
+        if (m != null) {
+            return List.of(m);
+        }
+        if (c != null) {
+            final var account = query.get("account");
+            if (account == null || account.isEmpty()) {
+                return c.getManagers();
+            } else {
+                final var manager = c.getManager(account);
+                if (manager == null) {
+                    return null;
+                }
+                return List.of(manager);
+            }
+        }
+        throw new AssertionError("Unreachable state");
+    }
+
+    private List<Pair<Manager, Manager.ReceiveMessageHandler>> subscribeReceiveHandlers(
+            final List<Manager> managers, final ServerSentEventSender sender, Callable unsubscribe
+    ) {
+        return managers.stream().map(m1 -> {
+            final var receiveMessageHandler = new JsonReceiveMessageHandler(m1, s -> {
+                try {
+                    sender.sendEvent(null, "receive", List.of(objectMapper.writeValueAsString(s)));
+                } catch (IOException e) {
+                    unsubscribe.call();
+                }
+            });
+            m1.addReceiveHandler(receiveMessageHandler);
+            return new Pair<>(m1, (Manager.ReceiveMessageHandler) receiveMessageHandler);
+        }).toList();
+    }
+
+    private void unsubscribeReceiveHandler(final Pair<Manager, Manager.ReceiveMessageHandler> pair) {
+        final var m = pair.first();
+        final var handler = pair.second();
+        m.removeReceiveHandler(handler);
+    }
+
+    private interface Callable {
+
+        void call();
+    }

 }
 }