| /* |
| * Copyright (C) 2010 Google Inc. All rights reserved. |
| * Copyright (C) 2012-2019 Apple 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. |
| */ |
| |
| #pragma once |
| |
| #include "BlobPropertyBag.h" |
| #include "BlobURL.h" |
| #include "FileReaderLoader.h" |
| #include "ScriptExecutionContext.h" |
| #include "ScriptWrappable.h" |
| #include "URLRegistry.h" |
| #include <variant> |
| #include <wtf/IsoMalloc.h> |
| #include <wtf/URL.h> |
| |
| namespace JSC { |
| class ArrayBufferView; |
| class ArrayBuffer; |
| } |
| |
| namespace WebCore { |
| |
| class Blob; |
| class BlobLoader; |
| class DeferredPromise; |
| class ReadableStream; |
| class ScriptExecutionContext; |
| class FragmentedSharedBuffer; |
| |
| template<typename> class ExceptionOr; |
| |
| using BlobPartVariant = std::variant<RefPtr<JSC::ArrayBufferView>, RefPtr<JSC::ArrayBuffer>, RefPtr<Blob>, String>; |
| |
| class Blob : public ScriptWrappable, public URLRegistrable, public RefCounted<Blob>, public ActiveDOMObject { |
| WTF_MAKE_ISO_ALLOCATED_EXPORT(Blob, WEBCORE_EXPORT); |
| public: |
| static Ref<Blob> create(ScriptExecutionContext* context) |
| { |
| auto blob = adoptRef(*new Blob(context)); |
| blob->suspendIfNeeded(); |
| return blob; |
| } |
| |
| static Ref<Blob> create(ScriptExecutionContext& context, Vector<BlobPartVariant>&& blobPartVariants, const BlobPropertyBag& propertyBag) |
| { |
| auto blob = adoptRef(*new Blob(context, WTFMove(blobPartVariants), propertyBag)); |
| blob->suspendIfNeeded(); |
| return blob; |
| } |
| |
| static Ref<Blob> create(ScriptExecutionContext* context, Vector<uint8_t>&& data, const String& contentType) |
| { |
| auto blob = adoptRef(*new Blob(context, WTFMove(data), contentType)); |
| blob->suspendIfNeeded(); |
| return blob; |
| } |
| |
| static Ref<Blob> deserialize(ScriptExecutionContext* context, const URL& srcURL, const String& type, long long size, const String& fileBackedPath) |
| { |
| ASSERT(Blob::isNormalizedContentType(type)); |
| auto blob = adoptRef(*new Blob(deserializationContructor, context, srcURL, type, size, fileBackedPath)); |
| blob->suspendIfNeeded(); |
| return blob; |
| } |
| |
| virtual ~Blob(); |
| |
| URL url() const { return m_internalURL; } |
| const String& type() const { return m_type; } |
| |
| WEBCORE_EXPORT unsigned long long size() const; |
| virtual bool isFile() const { return false; } |
| |
| // The checks described in the File API spec. |
| static bool isValidContentType(const String&); |
| // The normalization procedure described in the File API spec. |
| static String normalizedContentType(const String&); |
| #if ASSERT_ENABLED |
| static bool isNormalizedContentType(const String&); |
| static bool isNormalizedContentType(const CString&); |
| #endif |
| |
| // URLRegistrable |
| URLRegistry& registry() const override; |
| |
| Ref<Blob> slice(long long start, long long end, const String& contentType) const; |
| |
| void text(Ref<DeferredPromise>&&); |
| void arrayBuffer(Ref<DeferredPromise>&&); |
| ExceptionOr<Ref<ReadableStream>> stream(); |
| |
| // Keeping the handle alive will keep the Blob data alive (but not the Blob object). |
| BlobURLHandle handle() const; |
| |
| protected: |
| WEBCORE_EXPORT explicit Blob(ScriptExecutionContext*); |
| Blob(ScriptExecutionContext&, Vector<BlobPartVariant>&&, const BlobPropertyBag&); |
| Blob(ScriptExecutionContext*, Vector<uint8_t>&&, const String& contentType); |
| |
| enum ReferencingExistingBlobConstructor { referencingExistingBlobConstructor }; |
| Blob(ReferencingExistingBlobConstructor, ScriptExecutionContext*, const Blob&); |
| |
| enum UninitializedContructor { uninitializedContructor }; |
| Blob(UninitializedContructor, ScriptExecutionContext*, URL&&, String&& type); |
| |
| enum DeserializationContructor { deserializationContructor }; |
| Blob(DeserializationContructor, ScriptExecutionContext*, const URL& srcURL, const String& type, std::optional<unsigned long long> size, const String& fileBackedPath); |
| |
| // For slicing. |
| Blob(ScriptExecutionContext*, const URL& srcURL, long long start, long long end, const String& contentType); |
| |
| private: |
| void loadBlob(FileReaderLoader::ReadType, CompletionHandler<void(BlobLoader&)>&&); |
| |
| // ActiveDOMObject. |
| const char* activeDOMObjectName() const override; |
| |
| String m_type; |
| mutable std::optional<unsigned long long> m_size; |
| |
| // 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. |
| URL m_internalURL; |
| |
| HashSet<std::unique_ptr<BlobLoader>> m_blobLoaders; |
| }; |
| |
| } // namespace WebCore |