mirror of
https://github.com/caddyserver/caddy.git
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72 lines
2.2 KiB
Go
72 lines
2.2 KiB
Go
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// 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 maphandler
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import (
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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("map", parseCaddyfile)
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}
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// parseCaddyfile sets up the handler for a map from Caddyfile tokens. Syntax:
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//
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// map <source> <dest> {
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// [default <default>] - used if not match is found
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// [<regexp> <replacement>] - regular expression to match against the source find and the matching replacement value
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// ...
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// }
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//
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// The map takes a source variable and maps it into the dest variable. The mapping process
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// will check the source variable for the first successful match against a list of regular expressions.
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// If a successful match is found the dest variable will contain the replacement value.
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// If no successful match is found and the default is specified then the dest will contain the default value.
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//
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func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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m := new(Handler)
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for h.Next() {
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// first see if source and dest are configured
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if h.NextArg() {
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m.Source = h.Val()
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if h.NextArg() {
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m.Destination = h.Val()
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}
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}
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// load the rules
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for h.NextBlock(0) {
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expression := h.Val()
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if expression == "default" {
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args := h.RemainingArgs()
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if len(args) != 1 {
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return m, h.ArgErr()
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}
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m.Default = args[0]
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} else {
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args := h.RemainingArgs()
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if len(args) != 1 {
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return m, h.ArgErr()
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}
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m.Items = append(m.Items, Item{Expression: expression, Value: args[0]})
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}
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}
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}
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return m, nil
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}
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