1/*
2 * Copyright (C) 2012 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#include "JSBlob.h"
33
34#include "Blob.h"
35#include "ExceptionCode.h"
36#include "ExceptionCodePlaceholder.h"
37#include "JSDOMBinding.h"
38#include "JSDictionary.h"
39#include "JSFile.h"
40#include "WebKitBlobBuilder.h"
41#include <runtime/Error.h>
42#include <runtime/JSArray.h>
43#include <runtime/JSArrayBuffer.h>
44#include <runtime/JSArrayBufferView.h>
45#include <wtf/Assertions.h>
46
47using namespace JSC;
48
49namespace WebCore {
50
51JSValue toJS(ExecState*, JSDOMGlobalObject* globalObject, Blob* blob)
52{
53    if (!blob)
54        return jsNull();
55
56    if (blob->isFile())
57        return wrap<JSFile>(globalObject, static_cast<File*>(blob));
58
59    return wrap<JSBlob>(globalObject, blob);
60}
61
62EncodedJSValue JSC_HOST_CALL constructJSBlob(ExecState* exec)
63{
64    DOMConstructorObject* jsConstructor = jsCast<DOMConstructorObject*>(exec->callee());
65    ScriptExecutionContext* context = jsConstructor->scriptExecutionContext();
66    if (!context)
67        return throwVMError(exec, createReferenceError(exec, "Blob constructor associated document is unavailable"));
68
69    if (!exec->argumentCount()) {
70        RefPtr<Blob> blob = Blob::create();
71        return JSValue::encode(CREATE_DOM_WRAPPER(jsConstructor->globalObject(), Blob, blob.get()));
72    }
73
74    unsigned blobPartsLength = 0;
75    JSObject* blobParts = toJSSequence(exec, exec->argument(0), blobPartsLength);
76    if (exec->hadException())
77        return JSValue::encode(jsUndefined());
78    ASSERT(blobParts);
79
80    String type;
81    String endings = ASCIILiteral("transparent");
82
83    if (exec->argumentCount() > 1) {
84        JSValue blobPropertyBagValue = exec->argument(1);
85
86        if (!blobPropertyBagValue.isObject())
87            return throwVMError(exec, createTypeError(exec, "Second argument of the constructor is not of type Object"));
88
89        // Given the above test, this will always yield an object.
90        JSObject* blobPropertyBagObject = blobPropertyBagValue.toObject(exec);
91
92        // Create the dictionary wrapper from the initializer object.
93        JSDictionary dictionary(exec, blobPropertyBagObject);
94
95        // Attempt to get the endings property and validate it.
96        bool containsEndings = dictionary.get("endings", endings);
97        if (exec->hadException())
98            return JSValue::encode(jsUndefined());
99
100        if (containsEndings) {
101            if (endings != "transparent" && endings != "native")
102                return throwVMError(exec, createTypeError(exec, "The endings property must be either \"transparent\" or \"native\""));
103        }
104
105        // Attempt to get the type property.
106        dictionary.get("type", type);
107        if (exec->hadException())
108            return JSValue::encode(jsUndefined());
109    }
110
111    ASSERT(endings == "transparent" || endings == "native");
112
113    BlobBuilder blobBuilder;
114
115    for (unsigned i = 0; i < blobPartsLength; ++i) {
116        JSValue item = blobParts->get(exec, i);
117        if (exec->hadException())
118            return JSValue::encode(jsUndefined());
119
120        if (ArrayBuffer* arrayBuffer = toArrayBuffer(item))
121            blobBuilder.append(arrayBuffer);
122        else if (RefPtr<ArrayBufferView> arrayBufferView = toArrayBufferView(item))
123            blobBuilder.append(arrayBufferView.release());
124        else if (Blob* blob = toBlob(item))
125            blobBuilder.append(blob);
126        else {
127            String string = item.toString(exec)->value(exec);
128            if (exec->hadException())
129                return JSValue::encode(jsUndefined());
130            blobBuilder.append(string, endings);
131        }
132    }
133
134    RefPtr<Blob> blob = Blob::create(blobBuilder.finalize(), Blob::normalizedContentType(type));
135
136    return JSValue::encode(CREATE_DOM_WRAPPER(jsConstructor->globalObject(), Blob, blob.get()));
137}
138
139} // namespace WebCore
140