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Do not proxy image data url

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This commit is contained in:
Frédéric Guillot 2020-10-14 22:19:05 -07:00 • committed by Frédéric Guillot
parent 5c3e78f605
commit 3afdf25012
6 changed files with 111 additions and 13 deletions
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24
proxy/image_proxy.go
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@ -5,6 +5,7 @@
package proxy // import "miniflux.app/proxy"
import (
"regexp"
"strings"
"miniflux.app/config"
@ -14,6 +15,8 @@ import (
"github.com/gorilla/mux"
)
var regexSplitSrcset = regexp.MustCompile(`,\s+`)
// ImageProxyRewriter replaces image URLs with internal proxy URLs.
func ImageProxyRewriter(router *mux.Router, data string) string {
proxyImages := config.Opts.ProxyImages()
@ -28,7 +31,7 @@ func ImageProxyRewriter(router *mux.Router, data string) string {
doc.Find("img").Each(func(i int, img *goquery.Selection) {
if srcAttr, ok := img.Attr("src"); ok {
if proxyImages == "all" || !url.IsHTTPS(srcAttr) {
if !isDataURL(srcAttr) && (proxyImages == "all" || !url.IsHTTPS(srcAttr)) {
img.SetAttr("src", ProxifyURL(router, srcAttr))
}
}
@ -59,18 +62,21 @@ func ImageProxyRewriter(router *mux.Router, data string) string {
func proxifySourceSet(element *goquery.Selection, router *mux.Router, attributeValue string) {
var proxifiedSources []string
for _, source := range strings.Split(attributeValue, ",") {
for _, source := range regexSplitSrcset.Split(attributeValue, -1) {
parts := strings.Split(strings.TrimSpace(source), " ")
nbParts := len(parts)
if nbParts > 0 {
source = ProxifyURL(router, parts[0])
if nbParts > 1 {
source += " " + parts[1]
rewrittenSource := parts[0]
if !isDataURL(rewrittenSource) {
rewrittenSource = ProxifyURL(router, rewrittenSource)
}
proxifiedSources = append(proxifiedSources, source)
if nbParts > 1 {
rewrittenSource += " " + parts[1]
}
proxifiedSources = append(proxifiedSources, rewrittenSource)
}
}
@ -78,3 +84,7 @@ func proxifySourceSet(element *goquery.Selection, router *mux.Router, attributeV
element.SetAttr("srcset", strings.Join(proxifiedSources, ", "))
}
}
func isDataURL(s string) bool {
return strings.HasPrefix(s, "data:")
}