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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef Stream_h
#define Stream_h
#include "core/CoreExport.h"
#include "core/dom/SuspendableObject.h"
#include "platform/heap/Handle.h"
#include "platform/weborigin/KURL.h"
#include "wtf/text/WTFString.h"
namespace blink {
class ExecutionContext;
class CORE_EXPORT Stream final : public GarbageCollectedFinalized<Stream>,
public SuspendableObject {
USING_GARBAGE_COLLECTED_MIXIN(Stream);
public:
static Stream* create(ExecutionContext* context, const String& mediaType) {
Stream* stream = new Stream(context, mediaType);
stream->suspendIfNeeded();
return stream;
}
~Stream() override;
// Returns the internal URL referring to this stream.
const KURL& url() const { return m_internalURL; }
// Returns the media type of this stream.
const String& type() const { return m_mediaType; }
// Appends data to this stream.
void addData(const char* data, size_t len);
// Flushes contents buffered in the stream.
void flush();
// Mark this stream finalized so that a reader of this stream is notified
// of EOF.
void finalize();
// Mark this stream finalized due to an error so that a reader of this
// stream is notified of EOF due to the error.
void abort();
// Allow an external reader class to mark this object neutered so that they
// won't load the corresponding stream again. All stream objects are
// read-once for now.
void neuter() { m_isNeutered = true; }
bool isNeutered() const { return m_isNeutered; }
// Implementation of SuspendableObject.
//
// FIXME: Implement suspend() and resume() when necessary.
void suspend() override;
void resume() override;
void contextDestroyed(ExecutionContext*) override;
DECLARE_VIRTUAL_TRACE();
protected:
Stream(ExecutionContext*, const String& mediaType);
// This is an internal URL referring to the blob data associated with this
// object. It serves as an identifier for this blob. The internal URL is never
// used to source the blob's content into an HTML or for FileRead'ing, public
// blob URLs must be used for those purposes.
KURL m_internalURL;
String m_mediaType;
bool m_isNeutered;
};
} // namespace blink
#endif // Stream_h
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