Blob.h revision 2daae5fd11344eaa88a0d92b0f6d65f8d2255c00 
1/*
2 * Copyright (C) 2010 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
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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#ifndef Blob_h
32#define Blob_h
33
34#include "BlobData.h"
35#include "KURL.h"
36#include "PlatformString.h"
37#include <wtf/PassOwnPtr.h>
38#include <wtf/PassRefPtr.h>
39#include <wtf/RefCounted.h>
40#include <wtf/Vector.h>
41
42namespace WebCore {
43
44class Blob : public RefCounted<Blob> {
45public:
46    static PassRefPtr<Blob> create(PassOwnPtr<BlobData> blobData, long long size)
47    {
48        return adoptRef(new Blob(blobData, size));
49    }
50
51    // For deserialization.
52    static PassRefPtr<Blob> create(const KURL& srcURL, const String& type, long long size)
53    {
54        return adoptRef(new Blob(srcURL, type, size));
55    }
56
57    virtual ~Blob();
58
59    const KURL& url() const { return m_internalURL; }
60    const String& type() const { return m_type; }
61
62    virtual unsigned long long size() const { return static_cast<unsigned long long>(m_size); }
63    virtual bool isFile() const { return false; }
64
65#if ENABLE(BLOB)
66    PassRefPtr<Blob> webkitSlice(long long start, long long end = std::numeric_limits<long long>::max(), const String& contentType = String()) const;
67#endif
68
69protected:
70    Blob(PassOwnPtr<BlobData>, long long size);
71
72    // For deserialization.
73    Blob(const KURL& srcURL, const String& type, long long size);
74
75    // This is an internal URL referring to the blob data associated with this object. It serves
76    // as an identifier for this blob. The internal URL is never used to source the blob's content
77    // into an HTML or for FileRead'ing, public blob URLs must be used for those purposes.
78    KURL m_internalURL;
79
80    String m_type;
81    long long m_size;
82};
83
84} // namespace WebCore
85
86#endif // Blob_h
87