1
0
Fork 0
miniflux/ui/proxy.go

76 lines
1.8 KiB
Go
Raw Normal View History

2017-11-20 00:10:04 -05:00
// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
2018-10-07 21:42:43 -04:00
package ui // import "miniflux.app/ui"
2017-11-20 00:10:04 -05:00
import (
"encoding/base64"
"errors"
"net/http"
2017-11-20 00:10:04 -05:00
"time"
2017-11-22 02:09:01 -05:00
"miniflux.app/config"
2018-08-25 00:51:50 -04:00
"miniflux.app/crypto"
"miniflux.app/http/request"
"miniflux.app/http/response"
"miniflux.app/http/response/html"
2019-09-22 14:17:15 -04:00
"miniflux.app/logger"
2017-11-20 00:10:04 -05:00
)
func (h *handler) imageProxy(w http.ResponseWriter, r *http.Request) {
2018-10-07 21:42:43 -04:00
// If we receive a "If-None-Match" header, we assume the image is already stored in browser cache.
if r.Header.Get("If-None-Match") != "" {
2018-10-07 21:42:43 -04:00
w.WriteHeader(http.StatusNotModified)
2017-11-22 02:09:01 -05:00
return
}
encodedURL := request.RouteStringParam(r, "encodedURL")
2017-11-20 00:10:04 -05:00
if encodedURL == "" {
2018-10-07 21:42:43 -04:00
html.BadRequest(w, r, errors.New("No URL provided"))
2017-11-20 00:10:04 -05:00
return
}
decodedURL, err := base64.URLEncoding.DecodeString(encodedURL)
2017-11-20 00:10:04 -05:00
if err != nil {
2018-10-07 21:42:43 -04:00
html.BadRequest(w, r, errors.New("Unable to decode this URL"))
2017-11-20 00:10:04 -05:00
return
}
2019-09-22 14:17:15 -04:00
imageURL := string(decodedURL)
logger.Debug(`[Proxy] Fetching %q`, imageURL)
req, err := http.NewRequest("GET", imageURL, nil)
2017-11-20 00:10:04 -05:00
if err != nil {
2018-10-07 21:42:43 -04:00
html.ServerError(w, r, err)
2017-11-20 00:10:04 -05:00
return
}
req.Header.Add("User-Agent", config.Opts.HTTPClientUserAgent())
req.Header.Add("Connection", "close")
2017-11-20 00:10:04 -05:00
clt := &http.Client{
Timeout: time.Duration(config.Opts.HTTPClientTimeout()) * time.Second,
}
resp, err := clt.Do(req)
if err != nil {
html.ServerError(w, r, err)
return
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
2018-10-07 21:42:43 -04:00
html.NotFound(w, r)
2017-11-20 00:10:04 -05:00
return
}
etag := crypto.HashFromBytes(decodedURL)
2017-11-20 00:10:04 -05:00
response.New(w, r).WithCaching(etag, 72*time.Hour, func(b *response.Builder) {
b.WithHeader("Content-Type", resp.Header.Get("Content-Type"))
b.WithBody(resp.Body)
2018-10-07 21:42:43 -04:00
b.WithoutCompression()
b.Write()
})
2017-11-20 00:10:04 -05:00
}