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114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/tools/content_decoder_tool/content_decoder_tool.h"
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#include <memory>
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#include <utility>
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#include "base/logging.h"
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#include "base/strings/string_util.h"
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#include "net/base/io_buffer.h"
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#include "net/base/test_completion_callback.h"
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#include "net/filter/brotli_source_stream.h"
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#include "net/filter/gzip_source_stream.h"
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#include "net/filter/source_stream.h"
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namespace net {
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namespace {
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const int kBufferLen = 4096;
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const char kDeflate[] = "deflate";
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const char kGZip[] = "gzip";
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const char kXGZip[] = "x-gzip";
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const char kBrotli[] = "br";
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class StdinSourceStream : public SourceStream {
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public:
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explicit StdinSourceStream(std::istream* input_stream)
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: SourceStream(SourceStream::TYPE_NONE), input_stream_(input_stream) {}
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~StdinSourceStream() override = default;
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// SourceStream implementation.
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int Read(IOBuffer* dest_buffer,
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int buffer_size,
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const CompletionCallback& callback) override {
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if (input_stream_->eof())
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return OK;
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if (input_stream_) {
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input_stream_->read(dest_buffer->data(), buffer_size);
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int bytes = input_stream_->gcount();
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return bytes;
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}
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return ERR_FAILED;
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}
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std::string Description() const override { return ""; }
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private:
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std::istream* input_stream_;
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DISALLOW_COPY_AND_ASSIGN(StdinSourceStream);
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};
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} // namespace
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// static
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bool ContentDecoderToolProcessInput(std::vector<std::string> content_encodings,
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std::istream* input_stream,
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std::ostream* output_stream) {
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std::unique_ptr<SourceStream> upstream(
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std::make_unique<StdinSourceStream>(input_stream));
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for (std::vector<std::string>::const_reverse_iterator riter =
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content_encodings.rbegin();
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riter != content_encodings.rend(); ++riter) {
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std::string content_encoding = *riter;
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std::unique_ptr<SourceStream> downstream = nullptr;
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if (base::LowerCaseEqualsASCII(content_encoding, kBrotli)) {
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downstream = CreateBrotliSourceStream(std::move(upstream));
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} else if (base::LowerCaseEqualsASCII(content_encoding, kDeflate)) {
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downstream = GzipSourceStream::Create(std::move(upstream),
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SourceStream::TYPE_DEFLATE);
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} else if (base::LowerCaseEqualsASCII(content_encoding, kGZip) ||
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base::LowerCaseEqualsASCII(content_encoding, kXGZip)) {
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downstream = GzipSourceStream::Create(std::move(upstream),
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SourceStream::TYPE_GZIP);
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} else {
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LOG(ERROR) << "Unsupported decoder '" << content_encoding << "'.";
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return false;
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}
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if (downstream == nullptr) {
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LOG(ERROR) << "Couldn't create the decoder.";
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return false;
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}
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upstream = std::move(downstream);
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}
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if (!upstream) {
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LOG(ERROR) << "Couldn't create the decoder.";
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return false;
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}
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scoped_refptr<IOBuffer> read_buffer = new IOBufferWithSize(kBufferLen);
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while (true) {
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TestCompletionCallback callback;
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int bytes_read =
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upstream->Read(read_buffer.get(), kBufferLen, callback.callback());
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if (bytes_read == ERR_IO_PENDING)
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bytes_read = callback.WaitForResult();
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if (bytes_read < 0) {
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LOG(ERROR) << "Couldn't decode stdin.";
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return false;
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}
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output_stream->write(read_buffer->data(), bytes_read);
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// If EOF is read, break out the while loop.
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if (bytes_read == 0)
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break;
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}
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return true;
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}
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} // namespace net
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