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58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef _nsDeflateConverter_h_
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#define _nsDeflateConverter_h_
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#include "nsIStreamConverter.h"
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#include "nsCOMPtr.h"
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#include "zlib.h"
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#include "mozilla/Attributes.h"
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#define DEFLATECONVERTER_CID \
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{ \
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0x461cd5dd, 0x73c6, 0x47a4, { \
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0x8c, 0xc3, 0x60, 0x3b, 0x37, 0xd8, 0x4a, 0x61 \
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} \
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}
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class nsDeflateConverter final : public nsIStreamConverter {
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public:
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static constexpr size_t kZipBufLen = (4 * 1024 - 1);
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NS_DECL_ISUPPORTS
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NS_DECL_NSIREQUESTOBSERVER
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NS_DECL_NSISTREAMLISTENER
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NS_DECL_NSISTREAMCONVERTER
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nsDeflateConverter() : mWrapMode(WRAP_NONE), mOffset(0), mZstream() {
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// 6 is Z_DEFAULT_COMPRESSION but we need the actual value
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mLevel = 6;
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}
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explicit nsDeflateConverter(int32_t level)
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: mWrapMode(WRAP_NONE), mOffset(0), mZstream() {
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mLevel = level;
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}
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private:
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~nsDeflateConverter() {}
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enum WrapMode { WRAP_ZLIB, WRAP_GZIP, WRAP_NONE };
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WrapMode mWrapMode;
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uint64_t mOffset;
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int32_t mLevel;
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nsCOMPtr<nsIStreamListener> mListener;
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nsCOMPtr<nsISupports> mContext;
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z_stream mZstream;
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unsigned char mWriteBuffer[kZipBufLen];
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nsresult Init();
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nsresult PushAvailableData(nsIRequest* aRequest);
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};
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#endif
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