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https://github.com/caddyserver/caddy.git
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9fe2ef417c
* Regexp support for simple rewrite rule * Add negate option for simplicity * ascertain explicit regexp char
130 lines
2.7 KiB
Go
130 lines
2.7 KiB
Go
// Copyright 2015 Light Code Labs, LLC
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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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"net/http"
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"strings"
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"github.com/mholt/caddy"
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"github.com/mholt/caddy/caddyhttp/httpserver"
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)
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func init() {
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caddy.RegisterPlugin("rewrite", caddy.Plugin{
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ServerType: "http",
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Action: setup,
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})
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}
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// setup configures a new Rewrite middleware instance.
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func setup(c *caddy.Controller) error {
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rewrites, err := rewriteParse(c)
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if err != nil {
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return err
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}
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cfg := httpserver.GetConfig(c)
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cfg.AddMiddleware(func(next httpserver.Handler) httpserver.Handler {
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return Rewrite{
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Next: next,
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FileSys: http.Dir(cfg.Root),
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Rules: rewrites,
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}
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})
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return nil
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}
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func rewriteParse(c *caddy.Controller) ([]httpserver.HandlerConfig, error) {
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var rules []httpserver.HandlerConfig
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for c.Next() {
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var rule Rule
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var err error
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var base = "/"
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var pattern, to string
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var ext []string
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var negate bool
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args := c.RemainingArgs()
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var matcher httpserver.RequestMatcher
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switch len(args) {
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case 1:
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base = args[0]
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fallthrough
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case 0:
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// Integrate request matcher for 'if' conditions.
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matcher, err = httpserver.SetupIfMatcher(c)
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if err != nil {
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return nil, err
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}
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for c.NextBlock() {
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if httpserver.IfMatcherKeyword(c) {
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continue
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}
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switch c.Val() {
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case "r", "regexp":
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if !c.NextArg() {
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return nil, c.ArgErr()
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}
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pattern = c.Val()
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case "to":
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args1 := c.RemainingArgs()
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if len(args1) == 0 {
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return nil, c.ArgErr()
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}
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to = strings.Join(args1, " ")
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case "ext":
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args1 := c.RemainingArgs()
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if len(args1) == 0 {
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return nil, c.ArgErr()
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}
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ext = args1
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default:
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return nil, c.ArgErr()
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}
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}
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// ensure to is specified
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if to == "" {
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return nil, c.ArgErr()
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}
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if rule, err = NewComplexRule(base, pattern, to, ext, matcher); err != nil {
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return nil, err
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}
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rules = append(rules, rule)
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// the only unhandled case is 2 and above
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default:
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if args[0] == "not" {
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negate = true
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args = args[1:]
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}
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rule, err = NewSimpleRule(args[0], strings.Join(args[1:], " "), negate)
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if err != nil {
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return nil, err
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}
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rules = append(rules, rule)
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}
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}
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return rules, nil
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}
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