WebSocket implementation in WebKit

WebCore/bindings/js/JSWebSocketConstructor.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"
+
+#if ENABLE(WEB_SOCKETS)
+
+#include "JSWebSocketConstructor.h"
+
+#include "JSWebSocket.h"
+#include "ScriptExecutionContext.h"
+#include "WebSocket.h"
+
+using namespace JSC;
+
+namespace WebCore {
+
+ASSERT_CLASS_FITS_IN_CELL(JSWebSocketConstructor);
+
+const ClassInfo JSWebSocketConstructor::s_info = { "WebSocketConstructor", 0, 0, 0 };
+
+JSWebSocketConstructor::JSWebSocketConstructor(ExecState* exec, JSDOMGlobalObject* globalObject)
+    : DOMConstructorObject(JSWebSocketConstructor::createStructure(globalObject->objectPrototype()), globalObject)
+{
+    putDirect(exec->propertyNames().prototype, JSWebSocketPrototype::self(exec, globalObject), None);
+    putDirect(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontDelete | DontEnum);
+}
+
+static JSObject* constructWebSocket(ExecState* exec, JSObject* constructor, const ArgList& args)
+{
+    JSWebSocketConstructor* jsConstructor = static_cast<JSWebSocketConstructor*>(constructor);
+    ScriptExecutionContext* context = jsConstructor->scriptExecutionContext();
+    if (!context)
+        return throwError(exec, ReferenceError, "WebSocket constructor associated document is unavailable");
+
+    if (args.size() == 0)
+        return throwError(exec, SyntaxError, "Not enough arguments");
+
+    const String& urlString = args.at(0).toString(exec);
+    if (exec->hadException())
+        return throwError(exec, SyntaxError, "wrong URL");
+    const KURL& url = context->completeURL(urlString);
+    RefPtr<WebSocket> webSocket = WebSocket::create(context);
+    ExceptionCode ec = 0;
+    if (args.size() < 2)
+        webSocket->connect(url, ec);
+    else {
+        const String& protocol = args.at(1).toString(exec);
+        if (exec->hadException())
+            return 0;
+        if (!protocol.length())
+            return throwError(exec, SyntaxError, "protocol is empty");
+        webSocket->connect(url, protocol, ec);
+    }
+    setDOMException(exec, ec);
+    return CREATE_DOM_OBJECT_WRAPPER(exec, jsConstructor->globalObject(), WebSocket, webSocket.get());
+}
+
+ConstructType JSWebSocketConstructor::getConstructData(ConstructData& constructData)
+{
+    constructData.native.function = constructWebSocket;
+    return ConstructTypeHost;
+}
+
+}  // namespace WebCore
+
+#endif