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// 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.
package ui // import "miniflux.app/ui"
import (
"encoding/base64"
"errors"
"io/ioutil"
"net/http"
"time"
"miniflux.app/crypto"
"miniflux.app/http/client"
"miniflux.app/http/request"
"miniflux.app/http/response"
"miniflux.app/http/response/html"
"miniflux.app/logger"
)
// ImageProxy fetch an image from a remote server and sent it back to the browser.
func (c *Controller) ImageProxy(w http.ResponseWriter, r *http.Request) {
// If we receive a "If-None-Match" header we assume the image in stored in browser cache
if r.Header.Get("If-None-Match") != "" {
response.NotModified(w)
return
}
encodedURL := request.Param(r, "encodedURL", "")
if encodedURL == "" {
html.BadRequest(w, errors.New("No URL provided"))
return
}
decodedURL, err := base64.URLEncoding.DecodeString(encodedURL)
if err != nil {
html.BadRequest(w, errors.New("Unable to decode this URL"))
return
}
clt := client.New(string(decodedURL))
resp, err := clt.Get()
if err != nil {
logger.Error("[Controller:ImageProxy] %v", err)
html.NotFound(w)
return
}
if resp.HasServerFailure() {
html.NotFound(w)
return
}
body, _ := ioutil.ReadAll(resp.Body)
etag := crypto.HashFromBytes(body)
response.Cache(w, r, resp.ContentType, etag, body, 72*time.Hour)
}
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