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/*
* Copyright (C) 2016 Apple Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted, provided that the following conditions
* are required to be met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of Apple 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 APPLE INC. AND ITS 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 APPLE INC. AND ITS 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.
*/
#include "config.h"
#include "FetchBodyConsumer.h"
#if ENABLE(FETCH_API)
#include "JSBlob.h"
#include "TextResourceDecoder.h"
namespace WebCore {
static inline Ref<Blob> blobFromData(const unsigned char* data, unsigned length, const String& contentType)
{
Vector<uint8_t> value(length);
memcpy(value.data(), data, length);
return Blob::create(WTFMove(value), contentType);
}
static inline bool shouldPrependBOM(const unsigned char* data, unsigned length)
{
if (length < 3)
return true;
return data[0] != 0xef || data[1] != 0xbb || data[2] != 0xbf;
}
static String textFromUTF8(const unsigned char* data, unsigned length)
{
auto decoder = TextResourceDecoder::create("text/plain", "UTF-8");
if (shouldPrependBOM(data, length))
decoder->decode("\xef\xbb\xbf", 3);
return decoder->decodeAndFlush(reinterpret_cast<const char*>(data), length);
}
void FetchBodyConsumer::resolveWithData(Ref<DeferredPromise>&& promise, const unsigned char* data, unsigned length)
{
switch (m_type) {
case Type::ArrayBuffer:
fulfillPromiseWithArrayBuffer(WTFMove(promise), data, length);
return;
case Type::Blob:
promise->resolveWithNewlyCreated<IDLInterface<Blob>>(blobFromData(data, length, m_contentType).get());
return;
case Type::JSON:
fulfillPromiseWithJSON(WTFMove(promise), textFromUTF8(data, length));
return;
case Type::Text:
promise->resolve<IDLDOMString>(textFromUTF8(data, length));
return;
case Type::None:
ASSERT_NOT_REACHED();
return;
}
}
void FetchBodyConsumer::resolve(Ref<DeferredPromise>&& promise)
{
ASSERT(m_type != Type::None);
switch (m_type) {
case Type::ArrayBuffer:
fulfillPromiseWithArrayBuffer(WTFMove(promise), takeAsArrayBuffer().get());
return;
case Type::Blob:
promise->resolveWithNewlyCreated<IDLInterface<Blob>>(takeAsBlob().get());
return;
case Type::JSON:
fulfillPromiseWithJSON(WTFMove(promise), takeAsText());
return;
case Type::Text:
promise->resolve<IDLDOMString>(takeAsText());
return;
case Type::None:
ASSERT_NOT_REACHED();
return;
}
}
void FetchBodyConsumer::append(const char* data, unsigned length)
{
if (!m_buffer) {
m_buffer = SharedBuffer::create(data, length);
return;
}
m_buffer->append(data, length);
}
void FetchBodyConsumer::append(const unsigned char* data, unsigned length)
{
append(reinterpret_cast<const char*>(data), length);
}
RefPtr<SharedBuffer> FetchBodyConsumer::takeData()
{
return WTFMove(m_buffer);
}
RefPtr<JSC::ArrayBuffer> FetchBodyConsumer::takeAsArrayBuffer()
{
if (!m_buffer)
return ArrayBuffer::tryCreate(nullptr, 0);
auto arrayBuffer = m_buffer->createArrayBuffer();
m_buffer = nullptr;
return arrayBuffer;
}
Ref<Blob> FetchBodyConsumer::takeAsBlob()
{
if (!m_buffer)
return Blob::create(Vector<uint8_t>(), m_contentType);
// FIXME: We should try to move m_buffer to Blob without doing extra copy.
return blobFromData(reinterpret_cast<const unsigned char*>(m_buffer->data()), m_buffer->size(), m_contentType);
}
String FetchBodyConsumer::takeAsText()
{
// FIXME: We could probably text decode on the fly as soon as m_type is set to JSON or Text.
if (!m_buffer)
return String();
auto text = textFromUTF8(reinterpret_cast<const unsigned char*>(m_buffer->data()), m_buffer->size());
m_buffer = nullptr;
return text;
}
} // namespace WebCore
#endif // ENABLE(FETCH_API)
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