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https://github.com/caddyserver/caddy.git
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c9980fd367
Use piles from which to draw config values. Module values can return their name, so now we can do two-way mapping from value to name and name to value; whereas before we could only map name to value. This was problematic with the Caddyfile adapter since it receives values and needs to know the name to put in the config.
100 lines
2.9 KiB
Go
100 lines
2.9 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package encode
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import (
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"encoding/json"
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"fmt"
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"github.com/caddyserver/caddy/v2"
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"github.com/caddyserver/caddy/v2/caddyconfig"
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"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
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"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
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"github.com/caddyserver/caddy/v2/modules/caddyhttp"
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)
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func init() {
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httpcaddyfile.RegisterHandlerDirective("encode", parseCaddyfile)
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}
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// TODO: This is a good example of why UnmarshalCaddyfile is still a good idea... hmm.
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func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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enc := new(Encode)
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err := enc.UnmarshalCaddyfile(h.Dispenser)
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if err != nil {
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return nil, err
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}
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return enc, nil
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}
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// TODO: Keep UnmarshalCaddyfile pattern?
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// UnmarshalCaddyfile sets up the handler from Caddyfile tokens. Syntax:
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//
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// encode [<matcher>] <formats...> {
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// gzip [<level>]
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// zstd
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// brotli [<quality>]
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// }
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//
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// Specifying the formats on the first line will use those formats' defaults.
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func (enc *Encode) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
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for d.Next() {
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for _, arg := range d.RemainingArgs() {
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mod, err := caddy.GetModule("http.encoders." + arg)
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if err != nil {
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return fmt.Errorf("finding encoder module '%s': %v", mod.Name, err)
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}
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encoding, ok := mod.New().(Encoding)
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if !ok {
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return fmt.Errorf("module %s is not an HTTP encoding", mod.Name)
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}
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if enc.EncodingsRaw == nil {
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enc.EncodingsRaw = make(map[string]json.RawMessage)
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}
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enc.EncodingsRaw[arg] = caddyconfig.JSON(encoding, nil)
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}
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for d.NextBlock() {
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name := d.Val()
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mod, err := caddy.GetModule("http.encoders." + name)
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if err != nil {
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return fmt.Errorf("getting encoder module '%s': %v", mod.Name, err)
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}
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unm, ok := mod.New().(caddyfile.Unmarshaler)
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if !ok {
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return fmt.Errorf("encoder module '%s' is not a Caddyfile unmarshaler", mod.Name)
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}
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err = unm.UnmarshalCaddyfile(d.NewFromNextTokens())
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if err != nil {
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return err
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}
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encoding, ok := unm.(Encoding)
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if !ok {
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return fmt.Errorf("module %s is not an HTTP encoding", mod.Name)
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}
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if enc.EncodingsRaw == nil {
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enc.EncodingsRaw = make(map[string]json.RawMessage)
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}
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enc.EncodingsRaw[name] = caddyconfig.JSON(encoding, nil)
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}
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}
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return nil
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}
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// Interface guard
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var _ caddyfile.Unmarshaler = (*Encode)(nil)
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