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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.
91 lines
2.5 KiB
Go
91 lines
2.5 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 headers
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import (
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"net/http"
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"strings"
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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("headers", parseCaddyfile)
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}
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// parseCaddyfile sets up the handler from Caddyfile tokens. Syntax:
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//
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// headers [<matcher>] [[+|-]<field> <value>] {
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// [+][<field>] [<value>]
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// [-<field>]
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// }
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//
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// Either a block can be opened or a single header field can be configured
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// in the first line, but not both in the same directive.
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func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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hdr := new(Headers)
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for h.Next() {
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// first see if headers are in the initial line
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var hasArgs bool
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if h.NextArg() {
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hasArgs = true
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field := h.Val()
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h.NextArg()
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value := h.Val()
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processCaddyfileLine(hdr, field, value)
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}
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// if not, they should be in a block
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for h.NextBlock() {
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if hasArgs {
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return nil, h.Err("cannot specify headers in both arguments and block")
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}
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field := h.Val()
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var value string
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if h.NextArg() {
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value = h.Val()
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}
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processCaddyfileLine(hdr, field, value)
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}
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}
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return hdr, nil
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}
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func processCaddyfileLine(hdr *Headers, field, value string) {
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if strings.HasPrefix(field, "+") {
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if hdr.Response == nil {
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hdr.Response = &RespHeaderOps{HeaderOps: new(HeaderOps)}
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}
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if hdr.Response.Add == nil {
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hdr.Response.Add = make(http.Header)
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}
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hdr.Response.Add.Set(field[1:], value)
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} else if strings.HasPrefix(field, "-") {
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if hdr.Response == nil {
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hdr.Response = &RespHeaderOps{HeaderOps: new(HeaderOps)}
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}
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hdr.Response.Delete = append(hdr.Response.Delete, field[1:])
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hdr.Response.Deferred = true
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} else {
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if hdr.Response == nil {
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hdr.Response = &RespHeaderOps{HeaderOps: new(HeaderOps)}
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}
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if hdr.Response.Set == nil {
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hdr.Response.Set = make(http.Header)
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}
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hdr.Response.Set.Set(field, value)
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}
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}
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