mirror of https://github.com/miniflux/v2.git
71 lines
1.9 KiB
Go
71 lines
1.9 KiB
Go
// Copyright 2020 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 proxy // import "miniflux.app/proxy"
|
|
|
|
import (
|
|
"strings"
|
|
|
|
"miniflux.app/config"
|
|
"miniflux.app/reader/sanitizer"
|
|
"miniflux.app/url"
|
|
|
|
"github.com/PuerkitoBio/goquery"
|
|
"github.com/gorilla/mux"
|
|
)
|
|
|
|
// ImageProxyRewriter replaces image URLs with internal proxy URLs.
|
|
func ImageProxyRewriter(router *mux.Router, data string) string {
|
|
proxyImages := config.Opts.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 srcAttrValue, ok := img.Attr("src"); ok {
|
|
if !isDataURL(srcAttrValue) && (proxyImages == "all" || !url.IsHTTPS(srcAttrValue)) {
|
|
img.SetAttr("src", ProxifyURL(router, srcAttrValue))
|
|
}
|
|
}
|
|
|
|
if srcsetAttrValue, ok := img.Attr("srcset"); ok {
|
|
proxifySourceSet(img, router, proxyImages, srcsetAttrValue)
|
|
}
|
|
})
|
|
|
|
doc.Find("picture source").Each(func(i int, sourceElement *goquery.Selection) {
|
|
if srcsetAttrValue, ok := sourceElement.Attr("srcset"); ok {
|
|
proxifySourceSet(sourceElement, router, proxyImages, srcsetAttrValue)
|
|
}
|
|
})
|
|
|
|
output, err := doc.Find("body").First().Html()
|
|
if err != nil {
|
|
return data
|
|
}
|
|
|
|
return output
|
|
}
|
|
|
|
func proxifySourceSet(element *goquery.Selection, router *mux.Router, proxyImages, srcsetAttrValue string) {
|
|
imageCandidates := sanitizer.ParseSrcSetAttribute(srcsetAttrValue)
|
|
|
|
for _, imageCandidate := range imageCandidates {
|
|
if !isDataURL(imageCandidate.ImageURL) && (proxyImages == "all" || !url.IsHTTPS(imageCandidate.ImageURL)) {
|
|
imageCandidate.ImageURL = ProxifyURL(router, imageCandidate.ImageURL)
|
|
}
|
|
}
|
|
|
|
element.SetAttr("srcset", imageCandidates.String())
|
|
}
|
|
|
|
func isDataURL(s string) bool {
|
|
return strings.HasPrefix(s, "data:")
|
|
}
|