mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-23 22:27:38 -05:00
133 lines
3.5 KiB
Go
133 lines
3.5 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 rewrite
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import (
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"strconv"
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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("rewrite", parseCaddyfileRewrite)
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httpcaddyfile.RegisterHandlerDirective("strip_prefix", parseCaddyfileStripPrefix)
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httpcaddyfile.RegisterHandlerDirective("strip_suffix", parseCaddyfileStripSuffix)
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httpcaddyfile.RegisterHandlerDirective("uri_replace", parseCaddyfileURIReplace)
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}
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// parseCaddyfileRewrite sets up a basic rewrite handler from Caddyfile tokens. Syntax:
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//
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// rewrite [<matcher>] <to>
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//
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// Only URI components which are given in <to> will be set in the resulting URI.
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// See the docs for the rewrite handler for more information.
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func parseCaddyfileRewrite(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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var rewr Rewrite
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for h.Next() {
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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rewr.URI = h.Val()
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if h.NextArg() {
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return nil, h.ArgErr()
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}
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}
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return rewr, nil
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}
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// parseCaddyfileStripPrefix sets up a handler from Caddyfile tokens. Syntax:
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//
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// strip_prefix [<matcher>] <prefix>
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//
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// The request path will be stripped the given prefix.
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func parseCaddyfileStripPrefix(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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var rewr Rewrite
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for h.Next() {
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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rewr.StripPathPrefix = h.Val()
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if h.NextArg() {
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return nil, h.ArgErr()
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}
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}
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return rewr, nil
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}
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// parseCaddyfileStripSuffix sets up a handler from Caddyfile tokens. Syntax:
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//
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// strip_suffix [<matcher>] <suffix>
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//
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// The request path will be stripped the given suffix.
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func parseCaddyfileStripSuffix(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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var rewr Rewrite
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for h.Next() {
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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rewr.StripPathSuffix = h.Val()
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if h.NextArg() {
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return nil, h.ArgErr()
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}
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}
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return rewr, nil
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}
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// parseCaddyfileURIReplace sets up a handler from Caddyfile tokens. Syntax:
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//
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// uri_replace [<matcher>] <find> <replace> [<limit>]
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//
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// Substring replacements will be performed on the request URI up to the
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// number specified by limit, if any (default = 0, or no limit).
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func parseCaddyfileURIReplace(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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var rewr Rewrite
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var repls []replacer
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for h.Next() {
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args := h.RemainingArgs()
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var find, replace, lim string
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switch len(args) {
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case 3:
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lim = args[2]
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fallthrough
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case 2:
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find = args[0]
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replace = args[1]
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default:
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return nil, h.ArgErr()
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}
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var limInt int
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if lim != "" {
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var err error
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limInt, err = strconv.Atoi(lim)
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if err != nil {
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return nil, h.Errf("limit must be an integer; invalid: %v", err)
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}
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}
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repls = append(repls, replacer{
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Find: find,
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Replace: replace,
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Limit: limInt,
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})
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}
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rewr.URISubstring = repls
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return rewr, nil
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}
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