158 lines
6.1 KiB
C++
158 lines
6.1 KiB
C++
/*
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* Copyright (C) 2010 Google Inc. All rights reserved.
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* Copyright (C) 2012-2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "BlobPropertyBag.h"
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#include "BlobURL.h"
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#include "FileReaderLoader.h"
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#include "ScriptExecutionContext.h"
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#include "ScriptWrappable.h"
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#include <wtf/IsoMalloc.h>
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#include <wtf/URL.h>
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#include "URLRegistry.h"
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#include <wtf/Variant.h>
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namespace JSC {
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class ArrayBufferView;
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class ArrayBuffer;
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}
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namespace WebCore {
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class Blob;
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class BlobLoader;
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class DeferredPromise;
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class ReadableStream;
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class ScriptExecutionContext;
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class SharedBuffer;
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template<typename> class ExceptionOr;
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using BlobPartVariant = Variant<RefPtr<JSC::ArrayBufferView>, RefPtr<JSC::ArrayBuffer>, RefPtr<Blob>, String>;
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class Blob : public ScriptWrappable, public URLRegistrable, public RefCounted<Blob>, public ActiveDOMObject {
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WTF_MAKE_ISO_ALLOCATED_EXPORT(Blob, WEBCORE_EXPORT);
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public:
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static Ref<Blob> create(ScriptExecutionContext* context)
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{
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auto blob = adoptRef(*new Blob(context));
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blob->suspendIfNeeded();
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return blob;
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}
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static Ref<Blob> create(ScriptExecutionContext& context, Vector<BlobPartVariant>&& blobPartVariants, const BlobPropertyBag& propertyBag)
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{
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auto blob = adoptRef(*new Blob(context, WTFMove(blobPartVariants), propertyBag));
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blob->suspendIfNeeded();
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return blob;
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}
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static Ref<Blob> create(ScriptExecutionContext* context, Vector<uint8_t>&& data, const String& contentType)
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{
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auto blob = adoptRef(*new Blob(context, WTFMove(data), contentType));
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blob->suspendIfNeeded();
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return blob;
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}
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static Ref<Blob> deserialize(ScriptExecutionContext* context, const URL& srcURL, const String& type, long long size, const String& fileBackedPath)
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{
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ASSERT(Blob::isNormalizedContentType(type));
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auto blob = adoptRef(*new Blob(deserializationContructor, context, srcURL, type, size, fileBackedPath));
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blob->suspendIfNeeded();
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return blob;
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}
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virtual ~Blob();
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URL url() const { return m_internalURL; }
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const String& type() const { return m_type; }
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WEBCORE_EXPORT unsigned long long size() const;
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virtual bool isFile() const { return false; }
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// The checks described in the File API spec.
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static bool isValidContentType(const String&);
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// The normalization procedure described in the File API spec.
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static String normalizedContentType(const String&);
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#if ASSERT_ENABLED
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static bool isNormalizedContentType(const String&);
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static bool isNormalizedContentType(const CString&);
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#endif
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// URLRegistrable
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URLRegistry& registry() const override;
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Ref<Blob> slice(ScriptExecutionContext&, long long start, long long end, const String& contentType) const;
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void text(ScriptExecutionContext&, Ref<DeferredPromise>&&);
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void arrayBuffer(ScriptExecutionContext&, Ref<DeferredPromise>&&);
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ExceptionOr<Ref<ReadableStream>> stream(ScriptExecutionContext&);
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// Keeping the handle alive will keep the Blob data alive (but not the Blob object).
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BlobURLHandle handle() const;
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protected:
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WEBCORE_EXPORT explicit Blob(ScriptExecutionContext*);
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Blob(ScriptExecutionContext&, Vector<BlobPartVariant>&&, const BlobPropertyBag&);
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Blob(ScriptExecutionContext*, Vector<uint8_t>&&, const String& contentType);
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enum ReferencingExistingBlobConstructor { referencingExistingBlobConstructor };
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Blob(ReferencingExistingBlobConstructor, ScriptExecutionContext*, const Blob&);
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enum UninitializedContructor { uninitializedContructor };
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Blob(UninitializedContructor, ScriptExecutionContext*, URL&&, String&& type);
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enum DeserializationContructor { deserializationContructor };
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Blob(DeserializationContructor, ScriptExecutionContext*, const URL& srcURL, const String& type, std::optional<unsigned long long> size, const String& fileBackedPath);
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// For slicing.
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Blob(ScriptExecutionContext*, const URL& srcURL, long long start, long long end, const String& contentType);
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private:
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void loadBlob(ScriptExecutionContext&, FileReaderLoader::ReadType, CompletionHandler<void(BlobLoader&)>&&);
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// ActiveDOMObject.
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const char* activeDOMObjectName() const override;
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String m_type;
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mutable std::optional<unsigned long long> m_size;
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// This is an internal URL referring to the blob data associated with this object. It serves
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// as an identifier for this blob. The internal URL is never used to source the blob's content
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// into an HTML or for FileRead'ing, public blob URLs must be used for those purposes.
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URL m_internalURL;
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HashSet<std::unique_ptr<BlobLoader>> m_blobLoaders;
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};
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} // namespace WebCore
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