63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
// Copyright 2018 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package response // import "miniflux.app/http/response"
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import (
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"compress/flate"
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"compress/gzip"
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"net/http"
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"strings"
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"time"
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)
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// Redirect redirects the user to another location.
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func Redirect(w http.ResponseWriter, r *http.Request, path string) {
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http.Redirect(w, r, path, http.StatusFound)
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}
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// NotModified sends a response with a 304 status code.
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func NotModified(w http.ResponseWriter) {
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w.WriteHeader(http.StatusNotModified)
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}
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// Cache returns a response with caching headers.
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func Cache(w http.ResponseWriter, r *http.Request, mimeType, etag string, data []byte, duration time.Duration) {
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w.Header().Set("Content-Type", mimeType)
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w.Header().Set("ETag", etag)
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w.Header().Set("Cache-Control", "public")
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w.Header().Set("Expires", time.Now().Add(duration).Format(time.RFC1123))
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if etag == r.Header.Get("If-None-Match") {
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w.WriteHeader(http.StatusNotModified)
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return
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}
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switch mimeType {
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case "text/javascript; charset=utf-8", "text/css; charset=utf-8":
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Compress(w, r, data)
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default:
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w.Write(data)
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}
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}
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// Compress the response sent to the browser.
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func Compress(w http.ResponseWriter, r *http.Request, data []byte) {
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acceptEncoding := r.Header.Get("Accept-Encoding")
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switch {
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case strings.Contains(acceptEncoding, "gzip"):
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w.Header().Set("Content-Encoding", "gzip")
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gzipWriter := gzip.NewWriter(w)
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defer gzipWriter.Close()
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gzipWriter.Write(data)
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case strings.Contains(acceptEncoding, "deflate"):
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w.Header().Set("Content-Encoding", "deflate")
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flateWriter, _ := flate.NewWriter(w, -1)
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defer flateWriter.Close()
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flateWriter.Write(data)
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default:
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w.Write(data)
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}
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}
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