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https://github.com/caddyserver/caddy.git
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c9980fd367
Use piles from which to draw config values. Module values can return their name, so now we can do two-way mapping from value to name and name to value; whereas before we could only map name to value. This was problematic with the Caddyfile adapter since it receives values and needs to know the name to put in the config.
86 lines
2.2 KiB
Go
86 lines
2.2 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 markdown
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import (
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"bytes"
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"net/http"
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"strconv"
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"strings"
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"sync"
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"github.com/russross/blackfriday/v2"
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"github.com/caddyserver/caddy/v2"
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"github.com/caddyserver/caddy/v2/modules/caddyhttp"
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)
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func init() {
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caddy.RegisterModule(Markdown{})
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}
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// Markdown is a middleware for rendering a Markdown response body.
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type Markdown struct {
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}
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// CaddyModule returns the Caddy module information.
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func (Markdown) CaddyModule() caddy.ModuleInfo {
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return caddy.ModuleInfo{
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Name: "http.handlers.markdown",
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New: func() caddy.Module { return new(Markdown) },
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}
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}
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func (m Markdown) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
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buf := bufPool.Get().(*bytes.Buffer)
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buf.Reset()
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defer bufPool.Put(buf)
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shouldBuf := func(status int) bool {
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return strings.HasPrefix(w.Header().Get("Content-Type"), "text/")
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}
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rec := caddyhttp.NewResponseRecorder(w, buf, shouldBuf)
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err := next.ServeHTTP(rec, r)
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if err != nil {
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return err
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}
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if !rec.Buffered() {
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return nil
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}
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output := blackfriday.Run(buf.Bytes())
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w.Header().Set("Content-Length", strconv.Itoa(len(output)))
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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w.Header().Del("Accept-Ranges") // we don't know ranges for dynamically-created content
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w.Header().Del("Etag") // don't know a way to quickly generate etag for dynamic content
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w.Header().Del("Last-Modified") // useless for dynamic content since it's always changing
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w.WriteHeader(rec.Status())
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w.Write(output)
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return nil
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}
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var bufPool = sync.Pool{
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New: func() interface{} {
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return new(bytes.Buffer)
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},
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}
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// Interface guard
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var _ caddyhttp.MiddlewareHandler = (*Markdown)(nil)
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