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// 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 encode
import (
"fmt"
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/caddy/v2/caddyconfig"
"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
"github.com/caddyserver/caddy/v2/modules/caddyhttp"
)
func init() {
httpcaddyfile.RegisterHandlerDirective("encode", parseCaddyfile)
}
func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
enc := new(Encode)
err := enc.UnmarshalCaddyfile(h.Dispenser)
if err != nil {
return nil, err
}
return enc, nil
}
// UnmarshalCaddyfile sets up the handler from Caddyfile tokens. Syntax:
//
// encode [<matcher>] <formats...> {
// gzip [<level>]
// zstd
// }
//
// Specifying the formats on the first line will use those formats' defaults.
func (enc *Encode) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
for d.Next() {
for _, arg := range d.RemainingArgs() {
mod, err := caddy.GetModule("http.encoders." + arg)
if err != nil {
return fmt.Errorf("finding encoder module '%s': %v", mod, err)
}
encoding, ok := mod.New().(Encoding)
if !ok {
return fmt.Errorf("module %s is not an HTTP encoding", mod)
}
if enc.EncodingsRaw == nil {
enc.EncodingsRaw = make(caddy.ModuleMap)
}
enc.EncodingsRaw[arg] = caddyconfig.JSON(encoding, nil)
}
for d.NextBlock(0) {
name := d.Val()
mod, err := caddy.GetModule("http.encoders." + name)
if err != nil {
return fmt.Errorf("getting encoder module '%s': %v", name, err)
}
unm, ok := mod.New().(caddyfile.Unmarshaler)
if !ok {
return fmt.Errorf("encoder module '%s' is not a Caddyfile unmarshaler", mod)
}
err = unm.UnmarshalCaddyfile(d.NewFromNextSegment())
if err != nil {
return err
}
encoding, ok := unm.(Encoding)
if !ok {
return fmt.Errorf("module %s is not an HTTP encoding", mod)
}
if enc.EncodingsRaw == nil {
enc.EncodingsRaw = make(caddy.ModuleMap)
}
enc.EncodingsRaw[name] = caddyconfig.JSON(encoding, nil)
}
}
return nil
}
// Interface guard
var _ caddyfile.Unmarshaler = (*Encode)(nil)
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