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// Copyright 2015 Matthew Holt and The Caddy Authors
//
// 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 caddyhttp
import (
"fmt"
"net/http"
"strconv"
"github.com/caddyserver/caddy/v2"
)
func init() {
caddy.RegisterModule(caddy.Module{
Name: "http.responders.static",
New: func() interface{} { return new(Static) },
})
}
// Static implements a simple responder for static responses.
type Static struct {
StatusCode int `json:"status_code"` // TODO: should we turn this into a string so that only one field is needed? (string allows replacements)
StatusCodeStr string `json:"status_code_str"`
Headers http.Header `json:"headers"`
Body string `json:"body"`
Close bool `json:"close"`
}
func (s Static) ServeHTTP(w http.ResponseWriter, r *http.Request) error {
repl := r.Context().Value(caddy.ReplacerCtxKey).(caddy.Replacer)
// close the connection after responding
r.Close = s.Close
// set all headers
for field, vals := range s.Headers {
field = repl.ReplaceAll(field, "")
newVals := make([]string, len(vals))
for i := range vals {
newVals[i] = repl.ReplaceAll(vals[i], "")
}
w.Header()[field] = newVals
}
// do not allow Go to sniff the content-type
if w.Header().Get("Content-Type") == "" {
w.Header()["Content-Type"] = nil
}
// get the status code
statusCode := s.StatusCode
if statusCode == 0 && s.StatusCodeStr != "" {
intVal, err := strconv.Atoi(repl.ReplaceAll(s.StatusCodeStr, ""))
if err == nil {
statusCode = intVal
}
}
if statusCode == 0 {
statusCode = http.StatusOK
}
// write headers
w.WriteHeader(statusCode)
// write response body
if s.Body != "" {
fmt.Fprint(w, repl.ReplaceAll(s.Body, ""))
}
return nil
}
// Interface guard
var _ Handler = (*Static)(nil)
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