| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #ifndef GRPC_INTERNAL_CORE_CHANNEL_COMPRESS_FILTER_H |
| #define GRPC_INTERNAL_CORE_CHANNEL_COMPRESS_FILTER_H |
| |
| #include "src/core/channel/channel_stack.h" |
| |
| #define GRPC_COMPRESS_REQUEST_ALGORITHM_KEY "grpc-internal-encoding-request" |
| |
| /** Compression filter for outgoing data. |
| * |
| * See <grpc/compression.h> for the available compression settings. |
| * |
| * Compression settings may come from: |
| * - Channel configuration, as established at channel creation time. |
| * - The metadata accompanying the outgoing data to be compressed. This is |
| * taken as a request only. We may choose not to honor it. The metadata key |
| * is given by \a GRPC_COMPRESS_REQUEST_ALGORITHM_KEY. |
| * |
| * Compression can be disabled for concrete messages (for instance in order to |
| * prevent CRIME/BEAST type attacks) by having the GRPC_WRITE_NO_COMPRESS set in |
| * the BEGIN_MESSAGE flags. |
| * |
| * The attempted compression mechanism is added to the resulting initial |
| * metadata under the'grpc-encoding' key. |
| * |
| * If compression is actually performed, BEGIN_MESSAGE's flag is modified to |
| * incorporate GRPC_WRITE_INTERNAL_COMPRESS. Otherwise, and regardless of the |
| * aforementioned 'grpc-encoding' metadata value, data will pass through |
| * uncompressed. */ |
| |
| extern const grpc_channel_filter grpc_compress_filter; |
| |
| #endif /* GRPC_INTERNAL_CORE_CHANNEL_COMPRESS_FILTER_H */ |