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9343403358
Differentiating middleware and responders has one benefit, namely that it's clear which module provides the response, but even then it's not a great advantage. Linear handler config makes a little more sense, giving greater flexibility and simplifying the core a bit, even though it's slightly awkward that handlers which are responders may not use the 'next' handler that is passed in at all.
83 lines
2.0 KiB
Go
83 lines
2.0 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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"fmt"
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"net/http"
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"strconv"
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"github.com/caddyserver/caddy/v2"
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)
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func init() {
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caddy.RegisterModule(caddy.Module{
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Name: "http.handlers.static",
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New: func() interface{} { return new(Static) },
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})
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}
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// Static implements a simple responder for static responses.
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type Static struct {
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StatusCode string `json:"status_code"`
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Headers http.Header `json:"headers"`
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Body string `json:"body"`
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Close bool `json:"close"`
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}
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func (s Static) ServeHTTP(w http.ResponseWriter, r *http.Request, _ Handler) error {
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repl := r.Context().Value(caddy.ReplacerCtxKey).(caddy.Replacer)
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// close the connection after responding
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r.Close = s.Close
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// set all headers
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for field, vals := range s.Headers {
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field = repl.ReplaceAll(field, "")
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newVals := make([]string, len(vals))
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for i := range vals {
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newVals[i] = repl.ReplaceAll(vals[i], "")
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}
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w.Header()[field] = newVals
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}
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// do not allow Go to sniff the content-type
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if w.Header().Get("Content-Type") == "" {
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w.Header()["Content-Type"] = nil
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}
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// get the status code
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statusCode := http.StatusOK
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if s.StatusCode != "" {
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intVal, err := strconv.Atoi(repl.ReplaceAll(s.StatusCode, ""))
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if err == nil {
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statusCode = intVal
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}
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}
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// write headers
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w.WriteHeader(statusCode)
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// write response body
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if s.Body != "" {
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fmt.Fprint(w, repl.ReplaceAll(s.Body, ""))
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}
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return nil
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}
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// Interface guard
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var _ MiddlewareHandler = (*Static)(nil)
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