WebSocket implementation in WebKit

WebCore/bindings/v8/custom/V8WebSocketCustom.cpp

+/*
+ * Copyright (C) 2009 Google Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "WebSocket.h"
+
+#include "V8Binding.h"
+#include "V8ObjectEventListener.h"
+#include "V8Proxy.h"
+#include "V8Utilities.h"
+
+namespace WebCore {
+
+ACCESSOR_GETTER(WebSocketOnopen)
+{
+    INC_STATS("DOM.WebSocket.onopen._get");
+    WebSocket* websocket = V8Proxy::convertToNativeObject<WebSocket>(V8ClassIndex::WEBSOCKET, info.Holder());
+    if (websocket->onopen()) {
+        V8ObjectEventListener* listener = static_cast<V8ObjectEventListener*>(websocket->onopen());
+        v8::Local<v8::Object> v8Listener = listener->getListenerObject();
+        return v8Listener;
+    }
+    return v8::Null();
+}
+
+ACCESSOR_SETTER(WebSocketOnopen)
+{
+    INC_STATS("DOM.WebSocket.onopen._set");
+    WebSocket* websocket = V8Proxy::convertToNativeObject<WebSocket>(V8ClassIndex::WEBSOCKET, info.Holder());
+    if (value->IsNull()) {
+        if (websocket->onopen()) {
+            V8ObjectEventListener* listener = static_cast<V8ObjectEventListener*>(websocket->onopen());
+            v8::Local<v8::Object> v8Listener = listener->getListenerObject();
+            removeHiddenDependency(info.Holder(), v8Listener, V8Custom::kWebSocketCacheIndex);
+        }
+        // Clear the listener.
+        websocket->setOnopen(0);
+    } else {
+        RefPtr<EventListener> listener = getEventListener(websocket, value, false);
+        if (listener) {
+            websocket->setOnopen(listener);
+            createHiddenDependency(info.Holder(), value, V8Custom::kWebSocketCacheIndex);
+        }
+    }
+}
+
+ACCESSOR_GETTER(WebSocketOnmessage)
+{
+    INC_STATS("DOM.WebSocket.onmessage._get");
+    WebSocket* websocket = V8Proxy::convertToNativeObject<WebSocket>(V8ClassIndex::WEBSOCKET, info.Holder());
+    if (websocket->onmessage()) {
+        RefPtr<V8ObjectEventListener> listener = static_cast<V8ObjectEventListener*>(websocket->onmessage());
+        v8::Local<v8::Object> v8Listener = listener->getListenerObject();
+        return v8Listener;
+    }
+    return v8::Null();
+}
+
+ACCESSOR_SETTER(WebSocketOnmessage)
+{
+    INC_STATS("DOM.WebSocket.onmessage._set");
+    WebSocket* websocket = V8Proxy::convertToNativeObject<WebSocket>(V8ClassIndex::WEBSOCKET, info.Holder());
+    if (value->IsNull()) {
+        if (websocket->onmessage()) {
+            V8ObjectEventListener* listener = static_cast<V8ObjectEventListener*>(websocket->onmessage());
+            v8::Local<v8::Object> v8Listener = listener->getListenerObject();
+            removeHiddenDependency(info.Holder(), v8Listener, V8Custom::kWebSocketCacheIndex);
+        }
+        // Clear the listener.
+        websocket->setOnmessage(0);
+    } else {
+        RefPtr<EventListener> listener = getEventListener(websocket, value, false);
+        if (listener) {
+            websocket->setOnmessage(listener);
+            createHiddenDependency(info.Holder(), value, V8Custom::kWebSocketCacheIndex);
+        }
+    }
+}
+
+ACCESSOR_GETTER(WebSocketOnclose)
+{
+    INC_STATS("DOM.WebSocket.onclose._get");
+    WebSocket* websocket = V8Proxy::convertToNativeObject<WebSocket>(V8ClassIndex::WEBSOCKET, info.Holder());
+    if (websocket->onclose()) {
+        V8ObjectEventListener* listener = static_cast<V8ObjectEventListener*>(websocket->onclose());
+        v8::Local<v8::Object> v8Listener = listener->getListenerObject();
+        return v8Listener;
+    }
+    return v8::Null();
+}
+
+ACCESSOR_SETTER(WebSocketOnclose)
+{
+    INC_STATS("DOM.WebSocket.onclose._set");
+    WebSocket* websocket = V8Proxy::convertToNativeObject<WebSocket>(V8ClassIndex::WEBSOCKET, info.Holder());
+    if (value->IsNull()) {
+        if (websocket->onclose()) {
+            V8ObjectEventListener* listener = static_cast<V8ObjectEventListener*>(websocket->onclose());
+            v8::Local<v8::Object> v8Listener = listener->getListenerObject();
+            removeHiddenDependency(info.Holder(), v8Listener, V8Custom::kWebSocketCacheIndex);
+        }
+        // Clear the listener.
+        websocket->setOnclose(0);
+    } else {
+        RefPtr<EventListener> listener = getEventListener(websocket, value, false);
+        if (listener) {
+            websocket->setOnclose(listener);
+            createHiddenDependency(info.Holder(), value, V8Custom::kWebSocketCacheIndex);
+        }
+    }
+}
+
+// ??? AddEventListener, RemoveEventListener
+
+CALLBACK_FUNC_DECL(WebSocketConstructor)
+{
+    INC_STATS("DOM.WebSocket.Constructor");
+
+    if (!args.IsConstructCall())
+        return throwError("DOM object custructor cannot be called as a function.");
+    if (args.Length() == 0)
+        return throwError("Not enough arguments", V8Proxy::SyntaxError);
+
+    v8::TryCatch tryCatch;
+    v8::Handle<v8::String> urlstring = args[0]->ToString();
+    if (tryCatch.HasCaught())
+        return throwError(tryCatch.Exception());
+    if (urlstring.IsEmpty())
+        return throwError("Empty URL", V8Proxy::SyntaxError);
+
+    // Get the script execution context.
+    ScriptExecutionContext* context = 0;
+    // TODO(ukai): worker?
+    Frame* frame = V8Proxy::retrieveFrame();
+    if (!frame)
+        return thowError("WebSocket constructor associated frame is unavailable", V8Proxy::ReferenceError);
+    context = frame->document();
+    if (!context)
+        return thowError("WebSocket constructor associated document is unavailable", V8Proxy::ReferenceError);
+
+    const KURL& url = context->completeURL(toWebCoreString(urlstring));
+
+    RefPtr<WebSocket> websocket = WebSocket::create(context);
+
+    if (args.Length() < 2)
+        websocket->connect(url, ec);
+    else {
+        v8::TryCzatch tryCatchProtocol;
+        v8::Handle<v8::String> protocol = args[1]->ToString();
+        if (tryCatchProtocol.HasCaught())
+            return throwError(tryCatchProtocol.Exception());
+        if (protocol.IsEmpty())
+            return throwError("protocol is empty", V8Proxy::SyntaxError);
+        websocket->connect(url, toWebCoreString(protocol), ec);
+    }
+    if (ec)
+        return throwError(ec);
+
+    // Setup the standard wrapper object internal fields.
+    v8::Handle<v8::Object> wrapperObject = args.Holder();
+    V8Proxy::setDOMWrapper(wrapperObject, V8ClassIndex::WEBSOCKET, websocket.get());
+
+    websocket->ref();
+    V8Proxy::setJSWrapperForActiveDOMObject(websocket.get(), v8::Persistent<v8::Object>::New(wrapperObject));
+
+    return wrapperObject;
+}
+
+CALLBACK_FUNC_DECL(WebSocketSend)
+{
+    INC_STATS("DOM.WebSocket.send()");
+    WebSocket* websocket = V8Proxy::convertToNativeObject<WebSocket>(V8ClassIndex::WEBSOCKET, args.Holder());
+
+    ExceptionCode ec = 0;
+    bool ret = false;
+    if (args.Length() < 1)
+        return throwError("Not enough arguments", V8Proxy::SyntaxError);
+    else {
+        String msg = toWebCoreString(args[0]);
+        ret = websocket->send(msg, ec);
+    }
+    if (ec)
+        return throwError(ec);
+    return v8Boolean(ret);
+}
+
+CALLBACK_FUNC_DEC(WebSocketClose)
+{
+    INC_STATS("DOM.WebSocket.close()");
+    WebSocket* websocket = V8Proxy::convertToNativeObject<WebSocket>(V8ClassIndex::WEBSOCKET, args.Holder());
+
+    websocket->close();
+    return v8::Undefined();
+}
+
+}  // namespace WebCore