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      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
     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 #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 
     42 namespace WebCore {
     43 
     44 class Blob : public RefCounted<Blob> {
     45 public:
     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 
     69 protected:
     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