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1 // Copyright 2017 The Crashpad Authors. All rights reserved. | |
2 // | |
3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 // you may not use this file except in compliance with the License. | |
5 // You may obtain a copy of the License at | |
6 // | |
7 // http://www.apache.org/licenses/LICENSE-2.0 | |
8 // | |
9 // Unless required by applicable law or agreed to in writing, software | |
10 // distributed under the License is distributed on an "AS IS" BASIS, | |
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 // See the License for the specific language governing permissions and | |
13 // limitations under the License. | |
14 | |
15 #ifndef CRASHPAD_UTIL_NET_HTTP_BODY_GZIP_H_ | |
16 #define CRASHPAD_UTIL_NET_HTTP_BODY_GZIP_H_ | |
17 | |
18 #include <stdint.h> | |
19 #include <sys/types.h> | |
20 | |
21 #include <memory> | |
22 | |
23 #include "base/macros.h" | |
24 #include "util/file/file_io.h" | |
25 #include "util/net/http_body.h" | |
26 | |
27 extern "C" { | |
28 typedef struct z_stream_s z_stream; | |
29 } // extern "C" | |
30 | |
31 namespace crashpad { | |
32 | |
33 //! \brief An implementation of HTTPBodyStream that `gzip`-compresses another | |
34 //! HTTPBodyStream. | |
35 class GzipHTTPBodyStream : public HTTPBodyStream { | |
36 public: | |
37 explicit GzipHTTPBodyStream(std::unique_ptr<HTTPBodyStream> source); | |
38 | |
39 ~GzipHTTPBodyStream() override; | |
40 | |
41 // HTTPBodyStream: | |
42 FileOperationResult GetBytesBuffer(uint8_t* buffer, size_t max_len) override; | |
43 | |
44 private: | |
45 enum State : int { | |
46 kUninitialized, | |
47 kOperating, | |
48 kInputEOF, | |
49 kFinished, | |
50 kError, | |
51 }; | |
52 | |
53 // Calls deflateEnd() and transitions state_ to state. If deflateEnd() fails, | |
54 // logs a message and transitions state_ to State::kError. | |
55 void Done(State state); | |
56 | |
57 uint8_t input_[4096]; | |
58 std::unique_ptr<HTTPBodyStream> source_; | |
59 std::unique_ptr<z_stream> z_stream_; | |
60 State state_; | |
61 | |
62 DISALLOW_COPY_AND_ASSIGN(GzipHTTPBodyStream); | |
63 }; | |
64 | |
65 } // namespace crashpad | |
66 | |
67 #endif // CRASHPAD_UTIL_NET_HTTP_BODY_GZIP_H_ | |
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