1 /* 2 * Copyright (C) 2009 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 33 #include "ExceptionCode.h" 34 #include "MessagePort.h" 35 #include "SerializedScriptValue.h" 36 #include "V8Binding.h" 37 #include "V8MessagePortCustom.h" 38 #include "V8MessagePort.h" 39 #include "V8Proxy.h" 40 #include "V8Utilities.h" 41 #include "WorkerContextExecutionProxy.h" 42 43 namespace WebCore { 44 45 v8::Handle<v8::Value> V8MessagePort::postMessageCallback(const v8::Arguments& args) 46 { 47 INC_STATS("DOM.MessagePort.postMessage"); 48 MessagePort* messagePort = V8MessagePort::toNative(args.Holder()); 49 bool didThrow = false; 50 RefPtr<SerializedScriptValue> message = SerializedScriptValue::create(args[0], didThrow); 51 if (didThrow) 52 return v8::Undefined(); 53 MessagePortArray portArray; 54 if (args.Length() > 1) { 55 if (!getMessagePortArray(args[1], portArray)) 56 return v8::Undefined(); 57 } 58 ExceptionCode ec = 0; 59 messagePort->postMessage(message.release(), &portArray, ec); 60 return throwError(ec); 61 } 62 63 bool getMessagePortArray(v8::Local<v8::Value> value, MessagePortArray& portArray) 64 { 65 if (isUndefinedOrNull(value)) { 66 portArray.resize(0); 67 return true; 68 } 69 70 if (!value->IsObject()) { 71 throwError("MessagePortArray argument must be an object"); 72 return false; 73 } 74 uint32_t length = 0; 75 v8::Local<v8::Object> ports = v8::Local<v8::Object>::Cast(value); 76 77 if (value->IsArray()) { 78 v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value); 79 length = array->Length(); 80 } else { 81 // Sequence-type object - get the length attribute 82 v8::Local<v8::Value> sequenceLength = ports->Get(v8::String::New("length")); 83 if (!sequenceLength->IsNumber()) { 84 throwError("MessagePortArray argument has no length attribute"); 85 return false; 86 } 87 length = sequenceLength->Uint32Value(); 88 } 89 portArray.resize(length); 90 91 for (unsigned int i = 0; i < length; ++i) { 92 v8::Local<v8::Value> port = ports->Get(v8::Integer::New(i)); 93 // Validation of non-null objects, per HTML5 spec 8.3.3. 94 if (isUndefinedOrNull(port)) { 95 throwError(INVALID_STATE_ERR); 96 return false; 97 } 98 // Validation of Objects implementing an interface, per WebIDL spec 4.1.15. 99 if (!V8MessagePort::HasInstance(port)) { 100 throwError("MessagePortArray argument must contain only MessagePorts"); 101 return false; 102 } 103 portArray[i] = V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(port)); 104 } 105 return true; 106 } 107 108 } // namespace WebCore 109
