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