| /* |
| * |
| * Copyright 2017 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include <grpc/support/log.h> |
| |
| #include "src/core/lib/compression/stream_compression.h" |
| #include "src/core/lib/compression/stream_compression_gzip.h" |
| |
| extern const grpc_stream_compression_vtable |
| grpc_stream_compression_identity_vtable; |
| |
| bool grpc_stream_compress(grpc_stream_compression_context* ctx, |
| grpc_slice_buffer* in, grpc_slice_buffer* out, |
| size_t* output_size, size_t max_output_size, |
| grpc_stream_compression_flush flush) { |
| return ctx->vtable->compress(ctx, in, out, output_size, max_output_size, |
| flush); |
| } |
| |
| bool grpc_stream_decompress(grpc_stream_compression_context* ctx, |
| grpc_slice_buffer* in, grpc_slice_buffer* out, |
| size_t* output_size, size_t max_output_size, |
| bool* end_of_context) { |
| return ctx->vtable->decompress(ctx, in, out, output_size, max_output_size, |
| end_of_context); |
| } |
| |
| grpc_stream_compression_context* grpc_stream_compression_context_create( |
| grpc_stream_compression_method method) { |
| switch (method) { |
| case GRPC_STREAM_COMPRESSION_IDENTITY_COMPRESS: |
| case GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS: |
| return grpc_stream_compression_identity_vtable.context_create(method); |
| case GRPC_STREAM_COMPRESSION_GZIP_COMPRESS: |
| case GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS: |
| return grpc_stream_compression_gzip_vtable.context_create(method); |
| default: |
| gpr_log(GPR_ERROR, "Unknown stream compression method: %d", method); |
| return nullptr; |
| } |
| } |
| |
| void grpc_stream_compression_context_destroy( |
| grpc_stream_compression_context* ctx) { |
| ctx->vtable->context_destroy(ctx); |
| } |
| |
| int grpc_stream_compression_method_parse( |
| grpc_slice value, bool is_compress, |
| grpc_stream_compression_method* method) { |
| if (grpc_slice_eq(value, GRPC_MDSTR_IDENTITY)) { |
| *method = is_compress ? GRPC_STREAM_COMPRESSION_IDENTITY_COMPRESS |
| : GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS; |
| return 1; |
| } else if (grpc_slice_eq(value, GRPC_MDSTR_GZIP)) { |
| *method = is_compress ? GRPC_STREAM_COMPRESSION_GZIP_COMPRESS |
| : GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS; |
| return 1; |
| } else { |
| return 0; |
| } |
| } |