[tbb-commits] [tor-browser] 28/34: Bug 1692655. r=nika, mtigley, smaug a=RyanVM

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richard pushed a commit to branch tor-browser-91.9esr-11.0-1
in repository tor-browser.

commit 9b1a5a12a081a1115244a4cfc3b0968e7b973a10
Author: Gijs Kruitbosch <gijskruitbosch at gmail.com>
AuthorDate: Mon Apr 25 20:05:55 2022 +0000

    Bug 1692655. r=nika,mtigley,smaug a=RyanVM
    
    Differential Revision: https://phabricator.services.mozilla.com/D144618
---
 browser/actors/AboutReaderParent.jsm      |  7 +++
 toolkit/components/reader/AboutReader.jsm |  7 ++-
 toolkit/components/reader/ReaderMode.jsm  | 73 +++++++++----------------------
 3 files changed, 33 insertions(+), 54 deletions(-)

diff --git a/browser/actors/AboutReaderParent.jsm b/browser/actors/AboutReaderParent.jsm
index 8c01daf1df2dd..8f45088d4bed1 100644
--- a/browser/actors/AboutReaderParent.jsm
+++ b/browser/actors/AboutReaderParent.jsm
@@ -157,6 +157,13 @@ class AboutReaderParent extends JSWindowActorParent {
         break;
       }
 
+      case "RedirectTo": {
+        gCachedArticles.set(message.data.newURL, message.data.article);
+        // This is setup as a query so we can navigate the page after we've
+        // cached the relevant info in the parent.
+        return true;
+      }
+
       default:
         this.callListeners(message);
         break;
diff --git a/toolkit/components/reader/AboutReader.jsm b/toolkit/components/reader/AboutReader.jsm
index 0da0ab1b0ace9..73b00bfe6f92a 100644
--- a/toolkit/components/reader/AboutReader.jsm
+++ b/toolkit/components/reader/AboutReader.jsm
@@ -767,7 +767,12 @@ AboutReader.prototype = {
       try {
         article = await ReaderMode.downloadAndParseDocument(url);
       } catch (e) {
-        if (e && e.newURL) {
+        if (e?.newURL && this._actor) {
+          await this._actor.sendQuery("RedirectTo", {
+            newURL: e.newURL,
+            article: e.article,
+          });
+
           let readerURL = "about:reader?url=" + encodeURIComponent(e.newURL);
           this._win.location.replace(readerURL);
           return;
diff --git a/toolkit/components/reader/ReaderMode.jsm b/toolkit/components/reader/ReaderMode.jsm
index 7422b036ca652..e36816c10ed76 100644
--- a/toolkit/components/reader/ReaderMode.jsm
+++ b/toolkit/components/reader/ReaderMode.jsm
@@ -135,7 +135,7 @@ var ReaderMode = {
     });
 
     let url = win.document.location.href;
-    let originalURL = ReaderMode.getOriginalUrl(url);
+    let originalURL = this.getOriginalUrl(url);
     let webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
 
     if (!Services.appinfo.sessionHistoryInParent) {
@@ -219,7 +219,7 @@ var ReaderMode = {
   },
 
   getOriginalUrlObjectForDisplay(url) {
-    let originalUrl = ReaderMode.getOriginalUrl(url);
+    let originalUrl = this.getOriginalUrl(url);
     if (originalUrl) {
       let uriObj;
       try {
@@ -264,10 +264,11 @@ var ReaderMode = {
    * @resolves JS object representing the article, or null if no article is found.
    */
   async downloadAndParseDocument(url) {
-    let doc = await this._downloadDocument(url);
-    if (!doc) {
+    let result = await this._downloadDocument(url);
+    if (!result?.doc) {
       return null;
     }
+    let { doc, newURL } = result;
     if (
       !Readerable.shouldCheckUri(doc.documentURIObject) ||
       !Readerable.shouldCheckUri(doc.baseURIObject, true)
@@ -276,7 +277,14 @@ var ReaderMode = {
       return null;
     }
 
-    return this._readerParse(doc);
+    let article = await this._readerParse(doc);
+    // If we have to redirect, reject to the caller with the parsed article,
+    // so we can update the URL before displaying it.
+    if (newURL) {
+      return Promise.reject({ newURL, article });
+    }
+    // Otherwise, we can just continue with the article.
+    return article;
   },
 
   _downloadDocument(url) {
@@ -312,48 +320,6 @@ var ReaderMode = {
           return;
         }
 
-        // Manually follow a meta refresh tag if one exists.
-        let meta = doc.querySelector("meta[http-equiv=refresh]");
-        if (meta) {
-          let content = meta.getAttribute("content");
-          if (content) {
-            let urlIndex = content.toUpperCase().indexOf("URL=");
-            if (urlIndex > -1) {
-              let baseURI = Services.io.newURI(url);
-              let newURI = Services.io.newURI(
-                content.substring(urlIndex + 4),
-                null,
-                baseURI
-              );
-              let newURL = newURI.spec;
-              let ssm = Services.scriptSecurityManager;
-              let flags =
-                ssm.LOAD_IS_AUTOMATIC_DOCUMENT_REPLACEMENT |
-                ssm.DISALLOW_INHERIT_PRINCIPAL;
-              try {
-                ssm.checkLoadURIStrWithPrincipal(
-                  doc.nodePrincipal,
-                  newURL,
-                  flags
-                );
-              } catch (ex) {
-                let errorMsg =
-                  "Reader mode disallowed meta refresh (reason: " + ex + ").";
-
-                if (Services.prefs.getBoolPref("reader.errors.includeURLs")) {
-                  errorMsg += " Refresh target URI: '" + newURL + "'.";
-                }
-                reject(errorMsg);
-                return;
-              }
-              // Otherwise, pass an object indicating our new URL:
-              if (!baseURI.equalsExceptRef(newURI)) {
-                reject({ newURL });
-                return;
-              }
-            }
-          }
-        }
         let responseURL = xhr.responseURL;
         let givenURL = url;
         // Convert these to real URIs to make sure the escaping (or lack
@@ -369,14 +335,15 @@ var ReaderMode = {
           /* Ignore errors - we'll use what we had before */
         }
 
+        // We treat redirects as download successes here:
+        histogram.add(DOWNLOAD_SUCCESS);
+
+        let result = { doc };
         if (responseURL != givenURL) {
-          // We were redirected without a meta refresh tag.
-          // Force redirect to the correct place:
-          reject({ newURL: xhr.responseURL });
-          return;
+          result.newURL = xhr.responseURL;
         }
-        resolve(doc);
-        histogram.add(DOWNLOAD_SUCCESS);
+
+        resolve(result);
       };
       xhr.send();
     });

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