// Copyright 2017 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_UTIL_NET_HTTP_BODY_GZIP_H_
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#define CRASHPAD_UTIL_NET_HTTP_BODY_GZIP_H_
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#include <stdint.h>
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#include <sys/types.h>
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#include <memory>
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#include "base/macros.h"
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#include "util/file/file_io.h"
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#include "util/net/http_body.h"
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extern "C" {
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typedef struct z_stream_s z_stream;
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} // extern "C"
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namespace crashpad {
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//! \brief An implementation of HTTPBodyStream that `gzip`-compresses another
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//! HTTPBodyStream.
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class GzipHTTPBodyStream : public HTTPBodyStream {
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public:
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explicit GzipHTTPBodyStream(std::unique_ptr<HTTPBodyStream> source);
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~GzipHTTPBodyStream() override;
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// HTTPBodyStream:
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FileOperationResult GetBytesBuffer(uint8_t* buffer, size_t max_len) override;
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private:
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enum State : int {
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kUninitialized,
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kOperating,
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kInputEOF,
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kFinished,
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kError,
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};
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// Calls deflateEnd() and transitions state_ to state. If deflateEnd() fails,
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// logs a message and transitions state_ to State::kError.
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void Done(State state);
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uint8_t input_[4096];
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std::unique_ptr<HTTPBodyStream> source_;
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std::unique_ptr<z_stream> z_stream_;
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State state_;
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DISALLOW_COPY_AND_ASSIGN(GzipHTTPBodyStream);
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};
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} // namespace crashpad
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#endif // CRASHPAD_UTIL_NET_HTTP_BODY_GZIP_H_
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