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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 filter // import "miniflux.app/filter"
import (
"encoding/base64"
"strings"
"miniflux.app/config"
"miniflux.app/http/route"
"miniflux.app/url"
"github.com/PuerkitoBio/goquery"
"github.com/gorilla/mux"
)
// ImageProxyFilter rewrites image tag URLs to local proxy URL (by default only non-HTTPS URLs)
func ImageProxyFilter(router *mux.Router, cfg *config.Config, data string) string {
proxyImages := cfg.ProxyImages()
if proxyImages == "none" {
return data
}
doc, err := goquery.NewDocumentFromReader(strings.NewReader(data))
if err != nil {
return data
}
doc.Find("img").Each(func(i int, img *goquery.Selection) {
if srcAttr, ok := img.Attr("src"); ok {
if proxyImages == "all" || !url.IsHTTPS(srcAttr) {
img.SetAttr("src", Proxify(router, srcAttr))
}
}
})
output, _ := doc.Find("body").First().Html()
return output
}
// Proxify returns a proxified link.
func Proxify(router *mux.Router, link string) string {
// We use base64 url encoding to avoid slash in the URL.
return route.Path(router, "proxy", "encodedURL", base64.URLEncoding.EncodeToString([]byte(link)))
}
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