mirror of
https://github.com/caddyserver/caddy.git
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123 lines
3.3 KiB
Go
123 lines
3.3 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 caddyhttp
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import (
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"net/http"
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"strconv"
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"strings"
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"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
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)
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// ResponseMatcher is a type which can determine if an
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// HTTP response matches some criteria.
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type ResponseMatcher struct {
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// If set, one of these status codes would be required.
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// A one-digit status can be used to represent all codes
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// in that class (e.g. 3 for all 3xx codes).
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StatusCode []int `json:"status_code,omitempty"`
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// If set, each header specified must be one of the
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// specified values, with the same logic used by the
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// [request header matcher](/docs/json/apps/http/servers/routes/match/header/).
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Headers http.Header `json:"headers,omitempty"`
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}
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// Match returns true if the given statusCode and hdr match rm.
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func (rm ResponseMatcher) Match(statusCode int, hdr http.Header) bool {
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if !rm.matchStatusCode(statusCode) {
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return false
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}
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return matchHeaders(hdr, rm.Headers, "", nil)
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}
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func (rm ResponseMatcher) matchStatusCode(statusCode int) bool {
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if rm.StatusCode == nil {
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return true
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}
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for _, code := range rm.StatusCode {
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if StatusCodeMatches(statusCode, code) {
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return true
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}
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}
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return false
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}
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// ParseNamedResponseMatcher parses the tokens of a named response matcher.
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//
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// @name {
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// header <field> [<value>]
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// status <code...>
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// }
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//
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// Or, single line syntax:
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//
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// @name [header <field> [<value>]] | [status <code...>]
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//
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func ParseNamedResponseMatcher(d *caddyfile.Dispenser, matchers map[string]ResponseMatcher) error {
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for d.Next() {
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definitionName := d.Val()
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if _, ok := matchers[definitionName]; ok {
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return d.Errf("matcher is defined more than once: %s", definitionName)
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}
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matcher := ResponseMatcher{}
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for nesting := d.Nesting(); d.NextArg() || d.NextBlock(nesting); {
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switch d.Val() {
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case "header":
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if matcher.Headers == nil {
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matcher.Headers = http.Header{}
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}
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// reuse the header request matcher's unmarshaler
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headerMatcher := MatchHeader(matcher.Headers)
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err := headerMatcher.UnmarshalCaddyfile(d.NewFromNextSegment())
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if err != nil {
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return err
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}
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matcher.Headers = http.Header(headerMatcher)
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case "status":
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if matcher.StatusCode == nil {
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matcher.StatusCode = []int{}
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}
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args := d.RemainingArgs()
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if len(args) == 0 {
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return d.ArgErr()
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}
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for _, arg := range args {
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if len(arg) == 3 && strings.HasSuffix(arg, "xx") {
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arg = arg[:1]
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}
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statusNum, err := strconv.Atoi(arg)
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if err != nil {
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return d.Errf("bad status value '%s': %v", arg, err)
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}
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matcher.StatusCode = append(matcher.StatusCode, statusNum)
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}
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default:
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return d.Errf("unrecognized response matcher %s", d.Val())
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}
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}
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matchers[definitionName] = matcher
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}
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return nil
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}
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