// Copyright (c) 2017 Cloudflare, Inc. and contributors // Licensed under the MIT License: // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. #pragma once #include <kj/async-io.h> #include <zlib.h> namespace kj { class GzipAsyncInputStream final: public AsyncInputStream { public: GzipAsyncInputStream(AsyncInputStream& inner); ~GzipAsyncInputStream() noexcept(false); KJ_DISALLOW_COPY(GzipAsyncInputStream); Promise<size_t> tryRead(void* buffer, size_t minBytes, size_t maxBytes) override; private: AsyncInputStream& inner; z_stream ctx; bool atValidEndpoint = false; byte buffer[4096]; Promise<size_t> readImpl(byte* buffer, size_t minBytes, size_t maxBytes, size_t alreadyRead); }; class GzipAsyncOutputStream final: public AsyncOutputStream { public: GzipAsyncOutputStream(AsyncOutputStream& inner, int compressionLevel = Z_DEFAULT_COMPRESSION); ~GzipAsyncOutputStream() noexcept(false); KJ_DISALLOW_COPY(GzipAsyncOutputStream); Promise<void> write(const void* buffer, size_t size) override; Promise<void> write(ArrayPtr<const ArrayPtr<const byte>> pieces) override; Promise<void> end(); // Must call to flush the stream, since some data may be buffered. // // TODO(cleanup): This should be a virtual method on AsyncOutputStream. private: AsyncOutputStream& inner; bool ended = false; z_stream ctx; byte buffer[4096]; kj::Promise<void> pump(); }; } // namespace kj