mirror of https://github.com/miniflux/v2.git
114 lines
3.4 KiB
Go
114 lines
3.4 KiB
Go
// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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package mediaproxy // import "miniflux.app/v2/internal/mediaproxy"
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import (
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"strings"
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"miniflux.app/v2/internal/config"
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"miniflux.app/v2/internal/reader/sanitizer"
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"miniflux.app/v2/internal/urllib"
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"github.com/PuerkitoBio/goquery"
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"github.com/gorilla/mux"
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)
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type urlProxyRewriter func(router *mux.Router, url string) string
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func RewriteDocumentWithRelativeProxyURL(router *mux.Router, htmlDocument string) string {
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return genericProxyRewriter(router, ProxifyRelativeURL, htmlDocument)
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}
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func RewriteDocumentWithAbsoluteProxyURL(router *mux.Router, host, htmlDocument string) string {
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proxifyFunction := func(router *mux.Router, url string) string {
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return ProxifyAbsoluteURL(router, host, url)
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}
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return genericProxyRewriter(router, proxifyFunction, htmlDocument)
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}
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func genericProxyRewriter(router *mux.Router, proxifyFunction urlProxyRewriter, htmlDocument string) string {
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proxyOption := config.Opts.MediaProxyMode()
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if proxyOption == "none" {
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return htmlDocument
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}
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doc, err := goquery.NewDocumentFromReader(strings.NewReader(htmlDocument))
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if err != nil {
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return htmlDocument
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}
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for _, mediaType := range config.Opts.MediaProxyResourceTypes() {
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switch mediaType {
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case "image":
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doc.Find("img, picture source").Each(func(i int, img *goquery.Selection) {
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if srcAttrValue, ok := img.Attr("src"); ok {
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if shouldProxy(srcAttrValue, proxyOption) {
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img.SetAttr("src", proxifyFunction(router, srcAttrValue))
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}
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}
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if srcsetAttrValue, ok := img.Attr("srcset"); ok {
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proxifySourceSet(img, router, proxifyFunction, proxyOption, srcsetAttrValue)
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}
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})
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doc.Find("video").Each(func(i int, video *goquery.Selection) {
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if posterAttrValue, ok := video.Attr("poster"); ok {
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if shouldProxy(posterAttrValue, proxyOption) {
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video.SetAttr("poster", proxifyFunction(router, posterAttrValue))
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}
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}
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})
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case "audio":
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doc.Find("audio, audio source").Each(func(i int, audio *goquery.Selection) {
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if srcAttrValue, ok := audio.Attr("src"); ok {
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if shouldProxy(srcAttrValue, proxyOption) {
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audio.SetAttr("src", proxifyFunction(router, srcAttrValue))
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}
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}
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})
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case "video":
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doc.Find("video, video source").Each(func(i int, video *goquery.Selection) {
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if srcAttrValue, ok := video.Attr("src"); ok {
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if shouldProxy(srcAttrValue, proxyOption) {
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video.SetAttr("src", proxifyFunction(router, srcAttrValue))
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}
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}
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if posterAttrValue, ok := video.Attr("poster"); ok {
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if shouldProxy(posterAttrValue, proxyOption) {
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video.SetAttr("poster", proxifyFunction(router, posterAttrValue))
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}
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}
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})
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}
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}
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output, err := doc.Find("body").First().Html()
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if err != nil {
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return htmlDocument
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}
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return output
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}
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func proxifySourceSet(element *goquery.Selection, router *mux.Router, proxifyFunction urlProxyRewriter, proxyOption, srcsetAttrValue string) {
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imageCandidates := sanitizer.ParseSrcSetAttribute(srcsetAttrValue)
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for _, imageCandidate := range imageCandidates {
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if shouldProxy(imageCandidate.ImageURL, proxyOption) {
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imageCandidate.ImageURL = proxifyFunction(router, imageCandidate.ImageURL)
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}
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}
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element.SetAttr("srcset", imageCandidates.String())
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}
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func shouldProxy(attrValue, proxyOption string) bool {
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return !strings.HasPrefix(attrValue, "data:") &&
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(proxyOption == "all" || !urllib.IsHTTPS(attrValue))
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}
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