From 03128c6b588a06f88d45df67a09d59fd34bbda63 Mon Sep 17 00:00:00 2001
From: Jaifroid <egk10@cam.ac.uk>
Date: Mon, 25 Apr 2022 01:27:36 +0100
Subject: [PATCH] Enable limited support for Zimit ZIMs #249 (#248)

Former-commit-id: 7cec2025879b33b13fdec63c5ade01938ba42bab [formerly fb65802f6075bfd2de2f00c636b1c9f59b07a51f] [formerly 9d6091c79c2b24e714cb5214284aa1ebf2b0b0fb] [formerly db8e5eec98ea6333c6d34d6dd7e0c5c112a217aa [formerly cd8bb2cb5c381a6c936436cd9557f273d887264f [formerly 9b2a543c6c882c29e6889169fea914caa3136a32]]]
Former-commit-id: a65562bd36582a4098179544d7f21aa8b80f6b18 [formerly f0c743ac1332a315dc2d5f6ab07819c9e2e686c5 [formerly 16371c7c46feca2993cac90d9c4a75ffb6bb264b]]
Former-commit-id: c0629ff88c1118546471b0ac71e591eb8bf57ee5 [formerly 556babe8667fedfa263936450321e787b8cb522d]
Former-commit-id: 86344e2f0b85c54f7af797613f0d63ae0836369e
---
 CHANGELOG.md           |   1 +
 package.json           |   7 ++-
 package.json.nwjs      |   7 ++-
 scripts/Build-NWJS.ps1 |   7 ++-
 service-worker.js      |   2 +-
 www/index.html         |   1 +
 www/js/app.js          | 122 ++++++++++++++++++++++++++++++++++-------
 www/js/init.js         |   2 +-
 www/js/lib/images.js   |   1 +
 www/js/lib/uiUtil.js   |  20 ++++++-
 10 files changed, 142 insertions(+), 28 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a45e1198..a89cd785 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## In-progress release 1.9.8
 
+* FEATURE: Experimental support for reading Zimit ZIM archives
 * BUILD: Nightly builds of main app are now uploaded to a new server (with sftp instead of ssh)
 * BUILD: Deploy PWA image on a k8s cluster
 * BUILD: PWA images are now uploaded to ghcr.io instead of Docker Hub
diff --git a/package.json b/package.json
index 3414f813..db6b6e6f 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "kiwix-js-electron",
   "productName": "Kiwix JS Electron",
-  "version": "1.9.7-E",
+  "version": "1.9.8-E",
   "description": "Kiwix JS packaged for the Electron framework",
   "main": "main.js",
   "build": {
@@ -106,3 +106,8 @@
   }
 }
 
+
+
+
+
+
diff --git a/package.json.nwjs b/package.json.nwjs
index 70be3294..5402f4b8 100644
--- a/package.json.nwjs
+++ b/package.json.nwjs
@@ -1,7 +1,7 @@
 {
   "name": "kiwix_js_windows",
   "productName": "Kiwix JS Windows",
-  "version": "1.9.5-N",
+  "version": "1.9.8-N",
   "description": "Kiwix JS Windows for NWJS",
   "main": "index.html",
   "domain": "kiwix.js.windows",
@@ -88,3 +88,8 @@
   }
 }
 
+
+
+
+
+
diff --git a/scripts/Build-NWJS.ps1 b/scripts/Build-NWJS.ps1
index 1f7c6856..a9b4fa5e 100644
--- a/scripts/Build-NWJS.ps1
+++ b/scripts/Build-NWJS.ps1
@@ -11,7 +11,7 @@ if (-Not $only32bit) {
 }
 $version10 = "0.62.0" # <<< value updated automatically from package.json if launched from Create-DraftRelease
 $versionXP = "0.14.7"
-$appBuild = "1.9.5-N" # <<< value updated auotmatically from package.json if launched from Create-DraftRelease
+$appBuild = "1.9.8-N" # <<< value updated auotmatically from package.json if launched from Create-DraftRelease
 # $ZIMbase = "wikipedia_en_100"
 # Check that the dev has included the correct archive in this branch
 $init_params = Get-Content -Raw "$PSScriptRoot\..\www\js\init.js"
@@ -102,3 +102,8 @@ foreach ($build in $builds) {
 }
 
 
+
+
+
+
+
diff --git a/service-worker.js b/service-worker.js
index c00a44b2..a865560e 100644
--- a/service-worker.js
+++ b/service-worker.js
@@ -29,7 +29,7 @@
  * download and install a new copy; we have to hard code this here because it is needed before any other file
  * is cached in APP_CACHE
  */
-const appVersion = '1.9.7';
+const appVersion = '1.9.8';
 
 /**
  * The name of the Cache API cache in which assets defined in regexpCachedContentTypes will be stored
diff --git a/www/index.html b/www/index.html
index c717c80b..c41357f9 100644
--- a/www/index.html
+++ b/www/index.html
@@ -123,6 +123,7 @@
                     <div id="update" class="update">
                         <h3 style="margin-top:0;">Changes in version <span class="version">1.0</span></h3>
                         <ul style="padding-left: 15px;">
+                            <li>Experimental support for reading Zimit ZIM archives</li>
                             <li>Nightly builds of main app are now uploaded to a new server (with sftp instead of ssh)</li>
                             <li>Deploy PWA image on a k8s cluster</li>
                             <li>PWA images are now uploaded to ghcr.io instead of Docker Hub</li>
diff --git a/www/js/app.js b/www/js/app.js
index 35c586ae..c5de2646 100644
--- a/www/js/app.js
+++ b/www/js/app.js
@@ -3507,7 +3507,7 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                 appstate.selectedArchive.resolveRedirect(dirEntry, readArticle);
             } else {
                 //TESTING//
-                console.log("Initiating HTML load...");
+                console.log("Initiating HTML load of " + dirEntry.namespace + '/' + dirEntry.url + "...");
                 
                 //Set startup cookie to guard against boot loop
                 //Cookie will signal failure until article is fully loaded
@@ -3749,7 +3749,7 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                             }
                             var cacheKey = appstate.selectedArchive._file.name + '/' + title;
                             cache.getItemFromCacheOrZIM(appstate.selectedArchive, cacheKey, dirEntry).then(function (content) {
-                                console.log('SW read binary file for: ' + dirEntry.url);
+                                console.log('SW read binary file for: ' + dirEntry.namespace + '/' + dirEntry.url);
                                 if (/\b(css|javascript|video|vtt|webm)\b/i.test(mimetype)) {
                                     var shortTitle = dirEntry.url.replace(/[^/]+\//g, '').substring(0, 18);
                                     uiUtil.pollSpinner('Getting ' + shortTitle + '...');
@@ -3767,6 +3767,9 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                                     'imageDisplay': imageDisplayMode,
                                     'content': buffer
                                 };
+                                // Prevent running of replay system in Zimit files (it causes blocking exceptions, and we don't use it)
+                                if (params.zimitZim && /javascript/i.test(message.mimetype) && 
+                                    /(?:chunk\.js|\bload\.js|\bsw\.js)(?:[?#]|$)/.test(message.title)) message.content = '';
                                 if (content.buffer) {
                                     // In Edge Legacy, we have to transfer the buffer inside an array, whereas in Chromium, this produces an error
                                     // due to type not being transferrable... (and already detached, which may be to do with storing in IndexedDB in Electron)
@@ -3847,6 +3850,8 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
         // below, it will be further processed to calculate the ZIM URL from the relative path. This regex can cope with legitimate single
         // quote marks (') in the URL.
         params.regexpTagsWithZimUrl = /(<(?:img|script|link)\b[^>]*?\s)(?:src|href)(\s*=\s*(["']))(?![a-z][a-z0-9+.-]+:)(.+?)(?=\3|\?|#)([\s\S]*?>)/ig;
+        // Similar to above, but tailored for Zimit links
+        params.regexpZimitLinks = /(<(?:a|img|script|link|track)\b[^>]*?\s)(?:src|href)(=(["']))(?!#)(.+?)(?=\3|\?|#)([\s\S]*?>)/ig;
         // Regex below tests the html of an article for active content [kiwix-js #466]
         // It inspects every <script> block in the html and matches in the following cases: 1) the script loads a UI application called app.js;
         // 2) the script block has inline content that does not contain "importScript()", "toggleOpenSection" or an "articleId" assignment
@@ -3891,7 +3896,6 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
 
             //TESTING
             console.log("** HTML received **");
-            console.log("Loading stylesheets...");
             
             params.isLandingPage = appstate.selectedArchive.landingPageUrl === dirEntry.namespace + '/' + dirEntry.url ?
                 true : params.isLandingPage;
@@ -3930,13 +3934,44 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                 var wikiLang = appstate.selectedArchive._file.name.replace(/(?:wikipedia|wikivoyage|wiktionary)_([^_]+).+/i, '$1');
                 var wikimediaZimFlavour = appstate.selectedArchive._file.name.replace(/_.+/, '');
             }
+            // Check if we're dealing with a Zimit ZIM
+            params.zimitZim = /warc-headers/.test(Array.from(appstate.selectedArchive._file.mimeTypes));
+            if (params.isLandingPage && params.zimitZim) {
+                // Display Bootstrap alert regarding limited support
+                if (!params.hideActiveContentWarning) {
+                    setTimeout(function () {
+                        uiUtil.displayActiveContentWarning('zimit');
+                    }, 1000);
+                }
+                params.zimitStartPage = htmlArticle.match(/window\.mainUrl\s*=\s*(['"])https?:\/\/([^\/]+)(.+?)\1/);
+                if (params.zimitStartPage && params.zimitStartPage[2] && params.zimitStartPage[3]) {
+                    params.zimitPrefix = params.zimitStartPage[2];
+                    params.zimitStartPage = dirEntry.namespace + '/' + params.zimitPrefix + params.zimitStartPage[3];
+                } else {
+                    params.zimitStartPage = null;
+                }
+                if (params.zimitStartPage) {
+                    params.isLandingPage = false;
+                    goToArticle(params.zimitStartPage);
+                    return;
+                }
+            }
+            var newBlock;
             if (params.contentInjectionMode == 'jquery') {
-                htmlArticle = htmlArticle.replace(params.regexpTagsWithZimUrl, function(match, blockStart, equals, quote, relAssetUrl, blockClose) {
-                    var assetZIMUrl = uiUtil.deriveZimUrlFromRelativeUrl(relAssetUrl, params.baseURL);
+                var regexp = params.zimitZim ? params.regexpZimitLinks : params.regexpTagsWithZimUrl;
+                htmlArticle = htmlArticle.replace(regexp, function(match, blockStart, equals, quote, relAssetUrl, blockClose) {
+                    var assetZIMUrl;
+                    newBlock = match;
+                    if (params.zimitZim) {
+                        assetZIMUrl = relAssetUrl.replace(/^\//i, '/' + dirEntry.namespace + '/' + params.zimitPrefix + '/');
+                        assetZIMUrl = assetZIMUrl.replace(/^https?:\/\//i, '/' + dirEntry.namespace + '/'); 
+                    }
+                    assetZIMUrl = /^\//.test(assetZIMUrl) ? assetZIMUrl : uiUtil.deriveZimUrlFromRelativeUrl(relAssetUrl, params.baseURL);
+                    if (/^<a\s/i.test(match)) newBlock = newBlock.replace(relAssetUrl, assetZIMUrl); // For Zimit ZIMs
                     // DEV: Note that deriveZimUrlFromRelativeUrl produces a *decoded* URL (and incidentally would remove any URI component
                     // if we had captured it). We therefore re-encode the URI with encodeURI (which does not encode forward slashes) instead
                     // of encodeURIComponent.
-                    var newBlock = blockStart + 'data-kiwixurl' + equals + encodeURI(assetZIMUrl) + blockClose;
+                    else newBlock = blockStart + 'data-kiwixurl' + equals + encodeURI(assetZIMUrl) + blockClose;
                     // For Wikipedia archives, hyperlink the image to the File version
                     if (wikiLang && /^<img/i.test(blockStart) && !/usemap=/i.test(match)) {
                         newBlock = '<a href="https://' + wikiLang + '.' + wikimediaZimFlavour + '.org/wiki/File:' + 
@@ -3951,17 +3986,35 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                 htmlArticle = htmlArticle.replace(/(<(audio|video)\b(?:[^<]|<(?!\/\2))+<\/\2>)/ig, function (p0) {
                     return /(?:src|data-kiwixurl)\s*=\s*["']/.test(p0) ? p0 : '';
                 });
-            } else if (wikiLang) {
-                htmlArticle = htmlArticle.replace(params.regexpTagsWithZimUrl, function(match, blockStart, equals, quote, relAssetUrl, blockClose) {
-                    // For Wikipedia archives, hyperlink the image to the File version
-                    var assetZIMUrl = decodeURIComponent(relAssetUrl);
-                    if (/^<img/i.test(blockStart) && !/usemap=/i.test(match)) {
-                        var newBlock = '<a href="https://' + wikiLang + '.' + wikimediaZimFlavour + '.org/wiki/File:' + 
-                            assetZIMUrl.replace(/^.+\/([^/]+?\.(?:jpe?g|svg|png|gif))[^/]*$/i, '$1')
-                            + '" target="_blank">' + match + '</a>'
+            } else if (wikiLang || params.zimitZim) {
+                if (params.zimitZim) {
+                    if (!params.zimitPrefix) {
+                        params.zimitPrefix = htmlArticle.match(/link\s+rel=["']canonical["']\s+href=(['"])https?:\/\/([^\/]+)(.+?)\1/i);
+                        params.zimitPrefix = params.zimitPrefix ? params.zimitPrefix[2] : '';
                     }
-                    return newBlock || match;
-                });
+                    htmlArticle = htmlArticle.replace(params.regexpZimitLinks, function(match, blockStart, equals, quote, relAssetUrl, blockClose) {
+                        var newBlock = match;
+                        var assetZIMUrl = relAssetUrl.replace(/^\//i, dirEntry.namespace + '/' + params.zimitPrefix + '/');
+                        assetZIMUrl = assetZIMUrl.replace(/^https?:\/\//i, function (m0) {
+                            var rtnVal = '';
+                            if (/^<a\s/i.test(match)) rtnVal = '/';
+                            return rtnVal + dirEntry.namespace + '/';
+                        }); 
+                        newBlock = newBlock.replace(relAssetUrl, assetZIMUrl);
+                        return newBlock;
+                    });
+                } else {
+                    htmlArticle = htmlArticle.replace(params.regexpTagsWithZimUrl, function(match, blockStart, equals, quote, relAssetUrl, blockClose) {
+                        // For Wikipedia archives, hyperlink the image to the File version
+                        var assetZIMUrl = decodeURIComponent(relAssetUrl);
+                        if (/^<img/i.test(blockStart) && !/usemap=/i.test(match)) {
+                            newBlock = '<a href="https://' + wikiLang + '.' + wikimediaZimFlavour + '.org/wiki/File:' + 
+                                assetZIMUrl.replace(/^.+\/([^/]+?\.(?:jpe?g|svg|png|gif))[^/]*$/i, '$1')
+                                + '" target="_blank">' + match + '</a>'
+                        }
+                        return newBlock || match;
+                    });
+                }
             }
             
             //Some documents (e.g. Ray Charles Index) can't be scrolled to the very end, as some content remains benath the footer
@@ -4065,6 +4118,11 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                 htmlArticle = htmlArticle.replace(/(<[^>]+?)onclick\s*=\s*["'][^"']+["']\s*/ig, '$1');
                 //Neutralize href="javascript:" links
                 htmlArticle = htmlArticle.replace(/href\s*=\s*["']javascript:[^"']+["']/gi, 'href=""');
+            } else if (/journals\.openedition\.org/i.test(params.zimitPrefix)) {
+                // Neutralize all inline scripts, excluding math blocks or react templates, as they cause a loop on loading article
+                htmlArticle = htmlArticle.replace(/<(script\b(?![^>]+type\s*=\s*["'](?:math\/|text\/html|[^"']*?math))(?:[^<]|<(?!\/script>))+<\/script)>/ig, function (p0, p1) {
+                    return '<!-- ' + p1 + ' --!>';
+                });
             }
 
             //MathJax detection:
@@ -4171,6 +4229,7 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
             }
 
             //Preload stylesheets [kiwix-js #149]
+            console.log("Loading stylesheets...");
             //Set up blobArray of promises
             var prefix = (window.location.protocol + '//' + window.location.host + window.location.pathname).replace(/\/[^/]*$/, '');
             var cssArray = htmlArticle.match(regexpSheetHref);
@@ -4741,8 +4800,8 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                 } else if (anchorTarget) {
                     // It's a local anchor link : remove escapedUrl if any (see above)
                     anchor.setAttribute('href', '#' + anchorTarget[1]);
-                } else if (anchor.protocol !== currentProtocol ||
-                    anchor.host !== currentHost) {
+                } else if (!(params.zimitZim && ~href.indexOf(params.zimitPrefix)) && (anchor.protocol !== currentProtocol ||
+                    anchor.host !== currentHost)) {
                     // It's an external URL : we should open it in a new tab
                     anchor.target = '_blank';
                     if (anchor.protocol === 'bingmaps:') {
@@ -4754,6 +4813,11 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                     }
                 } else {
                     // It's a link to an article or file in the ZIM
+                    // if (params.zimitZim) {
+                    //     // Change absolute link to ZIM link
+                    //     var testZimitAnchor = new RegExp('^https?://' + params.zimitPrefix);
+                    //     href = href.replace(testZimitAnchor, dirEntry.namespace + '/' + params.zimitPrefix);
+                    // }
                     addListenersToLink(anchor, href, params.baseURL);
                 }
             });
@@ -4773,6 +4837,7 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
          */
         function addListenersToLink(a, href, baseUrl) {
             var uriComponent = uiUtil.removeUrlParameters(href);
+            var namespace = baseUrl.replace(/^([-ABCIJMUVWX])\/.+/, '$1');
             var loadingContainer = false;
             var contentType;
             var downloadAttrValue;
@@ -4834,7 +4899,14 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                 e.stopPropagation();
                 anchorParameter = href.match(/#([^#;]+)$/);
                 anchorParameter = anchorParameter ? anchorParameter[1] : '';
-                var zimUrl = uiUtil.deriveZimUrlFromRelativeUrl(uriComponent, baseUrl);
+                var zimUrl;
+                // Patch Zimit support
+                // if (params.zimitZim && params.contentInjectionMode === 'serviceworker') {
+                //     zimUrl = decodeURIComponent(uriComponent);
+                // } else {
+                    zimUrl = uiUtil.deriveZimUrlFromRelativeUrl(uriComponent, baseUrl);
+                // }
+                // if (params.zimitZim && !~zimUrl.indexOf(params.zimitPrefix)) zimUrl = namespace + '/' + params.zimitPrefix + '/' + zimUrl;
                 goToArticle(zimUrl, downloadAttrValue, contentType);
                 setTimeout(reset, 1400);
             };
@@ -5143,7 +5215,17 @@ define(['jquery', 'zimArchiveLoader', 'uiUtil', 'util', 'cache', 'images', 'sett
                 if (dirEntry === null || dirEntry === undefined) {
                     uiUtil.clearSpinner();
                     console.error("Article with title " + path + " not found in the archive");
-                    goToMainArticle();
+                    if (params.zimitZim) {
+                        path = path.replace(/^[AC]\//, 'http://');
+                        uiUtil.systemAlert('<p>We could not find an offline version of the requested article in this Zimit archive.</p>' +
+                            '<p>If you would like to open this page online in a new tab, please click this link:</p>' + 
+                            '<p><a href="' + path + '" target="_blank">' + path + '</a></p>');
+                        setTab();
+                    } else {
+                        uiUtil.systemAlert('<p>We could not find the article ' + path + ' in this archive!</p>' +
+                            '<p>Redirecting to landing page...</p>');
+                        goToMainArticle();
+                    }
                 } else if (download) {
                     appstate.selectedArchive.readBinaryFile(dirEntry, function (fileDirEntry, content) {
                         var mimetype = contentType || fileDirEntry.getMimetype();
diff --git a/www/js/init.js b/www/js/init.js
index 501418ad..1d32cc98 100644
--- a/www/js/init.js
+++ b/www/js/init.js
@@ -50,7 +50,7 @@ var params = {};
  */
 var appstate = {};
 /******** UPDATE VERSION IN service-worker.js TO MATCH VERSION AND CHECK PWASERVER BELOW!!!!!!! *******/
-params['appVersion'] = "1.9.7"; //DEV: Manually update this version when there is a new release: it is compared to the Settings Store "appVersion" in order to show first-time info, and the cookie is updated in app.js
+params['appVersion'] = "1.9.8"; //DEV: Manually update this version when there is a new release: it is compared to the Settings Store "appVersion" in order to show first-time info, and the cookie is updated in app.js
 /******* UPDATE THIS ^^^^^^ IN service worker AND PWA-SERVER BELOW !! ********************/
 params['packagedFile'] = getSetting('packagedFile') || "wikipedia_en_climate_change_mini_2022-03.zim"; //For packaged Kiwix JS (e.g. with Wikivoyage file), set this to the filename (for split files, give the first chunk *.zimaa) and place file(s) in default storage
 params['archivePath'] = "archives"; //The directory containing the packaged archive(s) (relative to app's root directory)  
diff --git a/www/js/lib/images.js b/www/js/lib/images.js
index 7ff6871e..3cb0a801 100644
--- a/www/js/lib/images.js
+++ b/www/js/lib/images.js
@@ -93,6 +93,7 @@ define(['uiUtil'], function (uiUtil) {
                 });
                 return;
             }
+            if (params.zimitZim) title = title.replace(/^\//, '');
             appstate.selectedArchive.getDirEntryByPath(title).then(function (dirEntry) {
                 return appstate.selectedArchive.readBinaryFile(dirEntry, function (fileDirEntry, content) {
                     image.style.background = '';
diff --git a/www/js/lib/uiUtil.js b/www/js/lib/uiUtil.js
index 963bf16a..5c93b451 100644
--- a/www/js/lib/uiUtil.js
+++ b/www/js/lib/uiUtil.js
@@ -324,14 +324,14 @@ define(rqDef, function(util) {
     /**
      * Displays a Bootstrap warning alert with information about how to access content in a ZIM with unsupported active UI
      */
-    function displayActiveContentWarning() {
+    function displayActiveContentWarning(type) {
         // We have to add the alert box in code, because Bootstrap removes it completely from the DOM when the user dismisses it
         var alertHTML =
             '<div id="activeContent" class="alert alert-warning alert-dismissible fade in" style="margin-bottom: 0;">' +
                 '<a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>' +
                 '<strong>Unable to display active content:</strong> To use Archive Index <b><i>type a space</i></b> in the box above, or else ' +
                 '<a id="swModeLink" href="#contentInjectionModeDiv" class="alert-link">switch to Service Worker mode</a> ' +
-                'if your platform supports it. &nbsp;[<a id="stop" href="#otherSettingsDiv" class="alert-link">Permanently hide</a>]' +
+                'if your platform supports it. &nbsp;[<a id="stop" href="#expertSettingsDiv" class="alert-link">Permanently hide</a>]' +
             '</div>';
         if (params.contentInjectionMode === 'serviceworker' && (params.manipulateImages || params.displayHiddenBlockElements || params.allowHTMLExtraction)) {
             alertHTML =
@@ -342,7 +342,21 @@ define(rqDef, function(util) {
                 params.manipulateImages ? '<a id="imModeLink" href="#imageManipulationDiv" class="alert-link">disable Image manipulation</a> ' : '') + 
                 (params.allowHTMLExtraction ? (params.displayHiddenBlockElements || params.manipulateImages ? 'and ' : '') + 
                 'disable Breakout link ' : '') + 'for this content to work properly. To use Archive Index <b><i>type a space</i></b> ' +
-                'in the box above.&nbsp;[<a id="stop" href="#otherSettingsDiv" class="alert-link">Permanently hide</a>]' +
+                'in the box above.&nbsp;[<a id="stop" href="#expertSettingsDiv" class="alert-link">Permanently hide</a>]' +
+            '</div>';
+        }
+        if (type === 'zimit') {
+            alertHTML =
+            '<div id="activeContent" class="alert alert-warning alert-dismissible fade in" style="margin-bottom: 0;">' +
+                '<a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>' +
+                '<strong>' + (params.contentInjectionMode === 'jquery' ? 'Limited Zimit' : 'Experimental') + ' support:</strong> ' + 
+                (params.contentInjectionMode === 'jquery' ? 'Please <a id="swModeLink" href="#contentInjectionModeDiv" ' + 
+                'class="alert-link">switch to Service Worker mode</a> if your platform supports it. ' : 
+                'Please note that this app only has experimental support for <b>Zimit</b> ZIMs, and ' + 
+                'in particular it may not run all active content. Audio and video may not work yet. ') + 
+                '<br />Search for your content in the search box above (start your search with .* to match part of a title)' +
+                ', or to use the Archive Index <b><i>type a space</i></b> in the box above.&nbsp;' +
+                '[<a id="stop" href="#expertSettingsDiv" class="alert-link">Permanently hide</a>]' +
             '</div>';
         }
         var alertBoxHeader = document.getElementById('alertBoxHeader');