mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-23 22:27:38 -05:00
75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy 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 caddygzip
|
|
|
|
import (
|
|
"compress/flate"
|
|
"compress/gzip" // TODO: consider using https://github.com/klauspost/compress/gzip
|
|
"fmt"
|
|
|
|
"github.com/caddyserver/caddy/v2"
|
|
"github.com/caddyserver/caddy/v2/modules/caddyhttp/encode"
|
|
)
|
|
|
|
func init() {
|
|
caddy.RegisterModule(caddy.Module{
|
|
Name: "http.encoders.gzip",
|
|
New: func() interface{} { return new(Gzip) },
|
|
})
|
|
}
|
|
|
|
// Gzip can create gzip encoders.
|
|
type Gzip struct {
|
|
Level int `json:"level,omitempty"`
|
|
}
|
|
|
|
// Provision provisions g's configuration.
|
|
func (g *Gzip) Provision(ctx caddy.Context) error {
|
|
if g.Level == 0 {
|
|
g.Level = defaultGzipLevel
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Validate validates g's configuration.
|
|
func (g Gzip) Validate() error {
|
|
if g.Level < flate.NoCompression {
|
|
return fmt.Errorf("quality too low; must be >= %d", flate.NoCompression)
|
|
}
|
|
if g.Level > flate.BestCompression {
|
|
return fmt.Errorf("quality too high; must be <= %d", flate.BestCompression)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// AcceptEncoding returns the name of the encoding as
|
|
// used in the Accept-Encoding request headers.
|
|
func (Gzip) AcceptEncoding() string { return "gzip" }
|
|
|
|
// NewEncoder returns a new gzip writer.
|
|
func (g Gzip) NewEncoder() encode.Encoder {
|
|
writer, _ := gzip.NewWriterLevel(nil, g.Level)
|
|
return writer
|
|
}
|
|
|
|
// Informed from http://blog.klauspost.com/gzip-performance-for-go-webservers/
|
|
var defaultGzipLevel = 5
|
|
|
|
// Interface guards
|
|
var (
|
|
_ encode.Encoding = (*Gzip)(nil)
|
|
_ caddy.Provisioner = (*Gzip)(nil)
|
|
_ caddy.Validator = (*Gzip)(nil)
|
|
)
|