| // Copyright 2016 The LUCI 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. |
| |
| package utils |
| |
| import ( |
| "bytes" |
| "compress/zlib" |
| "io" |
| ) |
| |
| // ZlibCompress zips a blob using zlib. |
| func ZlibCompress(in []byte) ([]byte, error) { |
| out := bytes.Buffer{} |
| w := zlib.NewWriter(&out) |
| _, writeErr := w.Write(in) |
| closeErr := w.Close() |
| if writeErr != nil { |
| return nil, writeErr |
| } |
| if closeErr != nil { |
| return nil, closeErr |
| } |
| return out.Bytes(), nil |
| } |
| |
| // ZlibDecompress unzips a blob using zlib. |
| func ZlibDecompress(in []byte) ([]byte, error) { |
| out := bytes.Buffer{} |
| r, err := zlib.NewReader(bytes.NewReader(in)) |
| if err != nil { |
| return nil, err |
| } |
| _, readErr := io.Copy(&out, r) |
| closeErr := r.Close() |
| if readErr != nil { |
| return nil, readErr |
| } |
| if closeErr != nil { |
| return nil, closeErr |
| } |
| return out.Bytes(), nil |
| } |