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
postMessageCallback(const v8::Arguments & args)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
getMessagePortArray(v8::Local<v8::Value> value,MessagePortArray & portArray)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