mirror of https://github.com/caddyserver/caddy.git
89 lines
2.3 KiB
Go
89 lines
2.3 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 eventsconfig is for configuring caddyevents.App with the
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// Caddyfile. This code can't be in the caddyevents package because
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// the httpcaddyfile package imports caddyhttp, which imports
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// caddyevents: hence, it creates an import cycle.
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package eventsconfig
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import (
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"encoding/json"
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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/caddyevents"
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)
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func init() {
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httpcaddyfile.RegisterGlobalOption("events", parseApp)
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}
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// parseApp configures the "events" global option from Caddyfile to set up the events app.
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// Syntax:
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//
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// events {
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// on <event> <handler_module...>
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// }
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//
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// If <event> is *, then it will bind to all events.
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func parseApp(d *caddyfile.Dispenser, _ any) (any, error) {
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app := new(caddyevents.App)
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// consume the option name
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if !d.Next() {
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return nil, d.ArgErr()
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}
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// handle the block
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for d.NextBlock(0) {
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switch d.Val() {
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case "on":
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if !d.NextArg() {
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return nil, d.ArgErr()
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}
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eventName := d.Val()
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if eventName == "*" {
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eventName = ""
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}
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if !d.NextArg() {
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return nil, d.ArgErr()
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}
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handlerName := d.Val()
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modID := "events.handlers." + handlerName
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unm, err := caddyfile.UnmarshalModule(d, modID)
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if err != nil {
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return nil, err
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}
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app.Subscriptions = append(app.Subscriptions, &caddyevents.Subscription{
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Events: []string{eventName},
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HandlersRaw: []json.RawMessage{
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caddyconfig.JSONModuleObject(unm, "handler", handlerName, nil),
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},
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})
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default:
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return nil, d.ArgErr()
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}
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}
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return httpcaddyfile.App{
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Name: "events",
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Value: caddyconfig.JSON(app, nil),
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}, nil
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}
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