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aa6c5fde07
* rewrite: strip_prefix, strip_suffix, uri_replace -> uri (closes #3140) * Add period, to satisfy @whitestrake :) and my own OCD * Restore implied / prefix
113 lines
3.1 KiB
Go
113 lines
3.1 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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"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("rewrite", parseCaddyfileRewrite)
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httpcaddyfile.RegisterHandlerDirective("uri", parseCaddyfileURI)
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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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// parseCaddyfileURI sets up a handler for manipulating (but not "rewriting") the
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// URI from Caddyfile tokens. Syntax:
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//
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// uri [<matcher>] strip_prefix|strip_suffix|replace <target> [<replacement> [<limit>]]
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//
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// If strip_prefix or strip_suffix are used, then <target> will be stripped
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// only if it is the beginning or the end, respectively, of the URI path. If
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// replace is used, then <target> will be replaced with <replacement> across
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// the whole URI, up to <limit> times (or unlimited if unspecified).
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func parseCaddyfileURI(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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var rewr Rewrite
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for h.Next() {
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args := h.RemainingArgs()
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if len(args) < 2 {
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return nil, h.ArgErr()
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}
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switch args[0] {
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case "strip_prefix":
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if len(args) > 2 {
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return nil, h.ArgErr()
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}
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rewr.StripPathPrefix = args[1]
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if !strings.HasPrefix(rewr.StripPathPrefix, "/") {
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rewr.StripPathPrefix = "/" + rewr.StripPathPrefix
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}
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case "strip_suffix":
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if len(args) > 2 {
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return nil, h.ArgErr()
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}
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rewr.StripPathSuffix = args[1]
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case "replace":
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var find, replace, lim string
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switch len(args) {
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case 4:
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lim = args[3]
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fallthrough
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case 3:
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find = args[1]
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replace = args[2]
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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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rewr.URISubstring = append(rewr.URISubstring, 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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default:
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return nil, h.Errf("unrecognized URI manipulation '%s'", args[0])
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}
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}
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return rewr, nil
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}
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