Don't try generating link previews for debuglogs.org

ts/models/messages.ts

@@ -2212,7 +2212,7 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
           (item: typeof window.WhatIsThis) =>
             (item.image || item.title) &&
             urls.includes(item.url) &&
-            LinkPreview.isLinkSafeToPreview(item.url)
+            LinkPreview.shouldPreviewHref(item.url)
         );
         if (preview.length < incomingPreview.length) {
           log.info(

ts/test-node/types/LinkPreview_test.ts

@@ -5,37 +5,41 @@ import { assert } from 'chai';
 
 import {
   findLinks,
-  isLinkSafeToPreview,
+  shouldPreviewHref,
   isLinkSneaky,
 } from '../../types/LinkPreview';
 
 describe('Link previews', () => {
-  describe('#isLinkSafeToPreview', () => {
+  describe('#shouldPreviewHref', () => {
     it('returns false for invalid URLs', () => {
-      assert.isFalse(isLinkSafeToPreview(''));
+      assert.isFalse(shouldPreviewHref(''));
-      assert.isFalse(isLinkSafeToPreview('https'));
+      assert.isFalse(shouldPreviewHref('https'));
-      assert.isFalse(isLinkSafeToPreview('https://'));
+      assert.isFalse(shouldPreviewHref('https://'));
-      assert.isFalse(isLinkSafeToPreview('https://bad url'));
+      assert.isFalse(shouldPreviewHref('https://bad url'));
-      assert.isFalse(isLinkSafeToPreview('example.com'));
+      assert.isFalse(shouldPreviewHref('example.com'));
     });
 
     it('returns false for non-HTTPS URLs', () => {
-      assert.isFalse(isLinkSafeToPreview('http://example.com'));
+      assert.isFalse(shouldPreviewHref('http://example.com'));
-      assert.isFalse(isLinkSafeToPreview('ftp://example.com'));
+      assert.isFalse(shouldPreviewHref('ftp://example.com'));
-      assert.isFalse(isLinkSafeToPreview('file://example'));
+      assert.isFalse(shouldPreviewHref('file://example'));
     });
 
     it('returns false if the link is "sneaky"', () => {
       // See `isLinkSneaky` tests below for more thorough checking.
-      assert.isFalse(isLinkSafeToPreview('https://user:pass@example.com'));
+      assert.isFalse(shouldPreviewHref('https://user:pass@example.com'));
-      assert.isFalse(isLinkSafeToPreview('https://aquí.example'));
+      assert.isFalse(shouldPreviewHref('https://aquí.example'));
-      assert.isFalse(isLinkSafeToPreview('https://aqu%C3%AD.example'));
+      assert.isFalse(shouldPreviewHref('https://aqu%C3%AD.example'));
+    });
+
+    it('returns false for skipped domains', () => {
+      assert.isFalse(shouldPreviewHref('https://debuglogs.org'));
     });
 
     it('returns true for "safe" urls', () => {
-      assert.isTrue(isLinkSafeToPreview('https://example.com'));
+      assert.isTrue(shouldPreviewHref('https://example.com'));
       assert.isTrue(
-        isLinkSafeToPreview('https://example.com/foo/bar?query=string#hash')
+        shouldPreviewHref('https://example.com/foo/bar?query=string#hash')
       );
     });
   });

ts/types/LinkPreview.ts

@@ -28,9 +28,14 @@ export type LinkPreviewWithDomain = {
 
 const linkify = LinkifyIt();
 
-export function isLinkSafeToPreview(href: string): boolean {
+export function shouldPreviewHref(href: string): boolean {
   const url = maybeParseUrl(href);
-  return Boolean(url && url.protocol === 'https:' && !isLinkSneaky(href));
+  return Boolean(
+    url &&
+      url.protocol === 'https:' &&
+      url.hostname !== 'debuglogs.org' &&
+      !isLinkSneaky(href)
+  );
 }
 
 export function isStickerPack(link = ''): boolean {

ts/views/conversation_view.ts

@@ -2999,7 +2999,7 @@ export class ConversationView extends window.Backbone.View<ConversationModel> {
 
     const link = links.find(
       item =>
-        LinkPreview.isLinkSafeToPreview(item) &&
+        LinkPreview.shouldPreviewHref(item) &&
         !this.excludedPreviewUrls.includes(item)
     );
     if (!link) {
@@ -3226,7 +3226,7 @@ export class ConversationView extends window.Backbone.View<ConversationModel> {
     }
 
     // This is already checked elsewhere, but we want to be extra-careful.
-    if (!LinkPreview.isLinkSafeToPreview(url)) {
+    if (!LinkPreview.shouldPreviewHref(url)) {
       return null;
     }
 
@@ -3241,7 +3241,7 @@ export class ConversationView extends window.Backbone.View<ConversationModel> {
     const { title, imageHref, description, date } = linkPreviewMetadata;
 
     let image;
-    if (imageHref && LinkPreview.isLinkSafeToPreview(imageHref)) {
+    if (imageHref && LinkPreview.shouldPreviewHref(imageHref)) {
       let objectUrl: void | string;
       try {
         const fullSizeImage =