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// Copyright 2015 Light Code Labs, LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package status is middleware for returning status code for requests
package status
import (
"net/http"
"github.com/caddyserver/caddy/caddyhttp/httpserver"
)
// Rule describes status rewriting rule
type Rule struct {
// Base path. Request to this path and sub-paths will be answered with StatusCode
Base string
// Status code to return
StatusCode int
// Request matcher
httpserver.RequestMatcher
}
// NewRule creates new Rule.
func NewRule(basePath string, status int) *Rule {
return &Rule{
Base: basePath,
StatusCode: status,
RequestMatcher: httpserver.PathMatcher(basePath),
}
}
// BasePath implements httpserver.HandlerConfig interface
func (rule *Rule) BasePath() string {
return rule.Base
}
// Status is a middleware to return status code for request
type Status struct {
Rules []httpserver.HandlerConfig
Next httpserver.Handler
}
// ServeHTTP implements the httpserver.Handler interface
func (status Status) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
if cfg := httpserver.ConfigSelector(status.Rules).Select(r); cfg != nil {
rule := cfg.(*Rule)
if rule.StatusCode < 400 {
// There's no ability to return response body --
// write the response status code in header and signal
// to other handlers that response is already handled
w.WriteHeader(rule.StatusCode)
return 0, nil
}
return rule.StatusCode, nil
}
return status.Next.ServeHTTP(w, r)
}
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