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https://bitbucket.org/chromiumembedded/cef
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75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
// Copyright 2016 The Chromium Embedded Framework 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 "libcef/browser/net/source_stream.h"
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#include <utility>
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#include "net/base/io_buffer.h"
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// Use TYPE_INVALID so that URLRequestJob::NotifyHeadersComplete() doesn't
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// assume that the "content-length" header is accurate.
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CefSourceStream::CefSourceStream(CefRefPtr<CefResponseFilter> cef_filter,
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std::unique_ptr<net::SourceStream> upstream)
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: net::FilterSourceStream(net::SourceStream::TYPE_INVALID,
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std::move(upstream)),
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cef_filter_(cef_filter) {}
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int CefSourceStream::FilterData(net::IOBuffer* output_buffer,
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int output_buffer_size,
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net::IOBuffer* input_buffer,
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int input_buffer_size,
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int* consumed_bytes,
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bool upstream_eof_reached) {
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if (!output_buffer || output_buffer_size <= 0)
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return net::ERR_CONTENT_DECODING_FAILED;
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if (input_buffer_size == 0 && last_status_ == RESPONSE_FILTER_DONE) {
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// No more input data. Respect the client's desire to be done with
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// outputting data.
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*consumed_bytes = 0;
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return 0;
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}
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size_t data_in_size = static_cast<size_t>(input_buffer_size);
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size_t data_in_read = 0;
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size_t data_out_size = static_cast<size_t>(output_buffer_size);
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size_t data_out_written = 0;
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last_status_ = cef_filter_->Filter(
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data_in_size > 0 ? input_buffer->data() : nullptr, data_in_size,
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data_in_read, output_buffer->data(), data_out_size, data_out_written);
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// Return early if there's an error.
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if (last_status_ == RESPONSE_FILTER_ERROR)
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return net::ERR_CONTENT_DECODING_FAILED;
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// Validate the out values.
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if (data_in_read > data_in_size) {
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LOG(ERROR) << "potential buffer overflow; data_in_read > data_in_size";
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return net::ERR_CONTENT_DECODING_FAILED;
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}
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if (data_out_written > data_out_size) {
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LOG(ERROR) << "potential buffer overflow; data_out_written > data_out_size";
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return net::ERR_CONTENT_DECODING_FAILED;
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}
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// If FilterData() returns 0, *|consumed_bytes| must be equal to
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// |input_buffer_size|.
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if (data_out_written == 0 && data_in_read != data_in_size) {
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LOG(ERROR) << "when no data is written all input must be consumed; "
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"data_out_written == 0 && data_in_read != data_in_size";
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return net::ERR_CONTENT_DECODING_FAILED;
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}
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*consumed_bytes = static_cast<int>(data_in_read);
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// Output the number of bytes written.
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return static_cast<int>(data_out_written);
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}
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std::string CefSourceStream::GetTypeAsString() const {
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return "cef_filter";
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}
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