mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-02 05:33:38 +08:00
125 lines
3.8 KiB
Go
125 lines
3.8 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 caddyfile
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import (
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"bytes"
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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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)
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// Adapter adapts Caddyfile to Caddy JSON.
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type Adapter struct {
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ServerType ServerType
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}
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// Adapt converts the Caddyfile config in body to Caddy JSON.
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func (a Adapter) Adapt(body []byte, options map[string]interface{}) ([]byte, []caddyconfig.Warning, error) {
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if a.ServerType == nil {
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return nil, nil, fmt.Errorf("no server type")
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}
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if options == nil {
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options = make(map[string]interface{})
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}
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filename, _ := options["filename"].(string)
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if filename == "" {
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filename = "Caddyfile"
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}
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serverBlocks, err := Parse(filename, body)
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if err != nil {
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return nil, nil, err
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}
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cfg, warnings, err := a.ServerType.Setup(serverBlocks, options)
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if err != nil {
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return nil, warnings, err
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}
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// lint check: see if input was properly formatted; sometimes messy files files parse
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// successfully but result in logical errors because the Caddyfile is a bad format
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// TODO: also perform this check on imported files
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if !bytes.Equal(Format(body), body) {
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warnings = append(warnings, caddyconfig.Warning{
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File: filename,
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Message: "file is not formatted with 'caddy fmt'",
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})
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}
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result, err := json.Marshal(cfg)
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return result, warnings, err
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}
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// Unmarshaler is a type that can unmarshal
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// Caddyfile tokens to set itself up for a
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// JSON encoding. The goal of an unmarshaler
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// is not to set itself up for actual use,
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// but to set itself up for being marshaled
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// into JSON. Caddyfile-unmarshaled values
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// will not be used directly; they will be
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// encoded as JSON and then used from that.
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// Implementations must be able to support
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// multiple segments (instances of their
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// directive or batch of tokens); typically
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// this means wrapping all token logic in
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// a loop: `for d.Next() { ... }`.
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type Unmarshaler interface {
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UnmarshalCaddyfile(d *Dispenser) error
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}
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// ServerType is a type that can evaluate a Caddyfile and set up a caddy config.
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type ServerType interface {
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// Setup takes the server blocks which
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// contain tokens, as well as options
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// (e.g. CLI flags) and creates a Caddy
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// config, along with any warnings or
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// an error.
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Setup([]ServerBlock, map[string]interface{}) (*caddy.Config, []caddyconfig.Warning, error)
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}
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// UnmarshalModule instantiates a module with the given ID and invokes
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// UnmarshalCaddyfile on the new value using the immediate next segment
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// of d as input. In other words, d's next token should be the first
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// token of the module's Caddyfile input.
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//
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// This function is used when the next segment of Caddyfile tokens
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// belongs to another Caddy module. The returned value is often
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// type-asserted to the module's associated type for practical use
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// when setting up a config.
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func UnmarshalModule(d *Dispenser, moduleID string) (Unmarshaler, error) {
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mod, err := caddy.GetModule(moduleID)
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if err != nil {
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return nil, d.Errf("getting module named '%s': %v", moduleID, err)
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}
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inst := mod.New()
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unm, ok := inst.(Unmarshaler)
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if !ok {
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return nil, d.Errf("module %s is not a Caddyfile unmarshaler; is %T", mod.ID, inst)
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}
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err = unm.UnmarshalCaddyfile(d.NewFromNextSegment())
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if err != nil {
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return nil, err
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}
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return unm, nil
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}
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// Interface guard
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var _ caddyconfig.Adapter = (*Adapter)(nil)
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