HTML5 offline “Application Cache Error event: Manifest fetch failed (-1)”

Question

I\'m trying to write an HTML5 offline application but can\'t seem to get Chrome to accept the cache manifest file.

Chrome logs the following output to its console wh

Answer 1

To cache a website offline (HTML5) you need to specify all the files needed for it to run. In short specify the site main components needed.

Easy way to create a manifest is in Note Pad.

Note: CACHE MANIFEST needs to be first line and your files will follow after a line space as follows:

CACHE MANIFEST

Scripts/script.js
Content/Site.css
Scripts/jquery-ui-1.8.20.min.js
Scripts/modernizr-2.5.3.js
SESOL.png
Scripts/jquery.formatCurrency-1.4.0.min.js
http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css
http://code.jquery.com/jquery-1.8.2.min.js
http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js
Content/themes/images/icons-18-white.png
Controllers/AccountController
Controllers/HomeController
Models/AccountModels
Account/Login
Home/CheckOut

Note2: remove all spaces after each line. Note:3 you need to follow the exact format FOLDER/File or FOLDER/FOLDER/FILE ect....

Just because you have a manifest file doesnt mean it will load. you need to add the following to the Tag:

Don't forget that after you add this it's cached the first time the page loads. So you need to register a cache event in the 'mobileinit' event.

$(document).on("mobileinit", function () {
  //register event to cache site for offline use
cache = window.applicationCache;
cache.addEventListener('updateready', cacheUpdatereadyListener, false);
cache.addEventListener('error', cacheErrorListener, false);
function cacheUpdatereadyListener (){
    window.applicationCache.update();
    window.applicationCache.swapCache();
    }
    function cacheErrorListener() {
        alert('site not availble offline')
    }
}

Download Safari and use the web inspector to find errors. http://developer.apple.com/library/safari/#documentation/appleapplications/Conceptual/Safari_Developer_Guide/1Introduction/Introduction.html#//apple_ref/doc/uid/TP40007874-CH1-SW1

Tip: Chrome's developer tools "F12" will show you the errors in the manifest load. ie the files you still need to add.

Hope this helps, covers the entire process. I assuming if you are at this stage in development you new to add these to the mobile init:

$.mobile.allowCrossDomainPages = true; // cross domain page loading
$.mobile.phonegapNavigationEnabled = true; //Android enabled mobile
$.mobile.page.prototype.options.domCache = true; //page caching prefech rendering
$.support.touchOverflow = true; //Android enhanced scrolling
$.mobile.touchOverflowEnabled = true; // enhanced scrolling transition availible in iOS 5

Safari Developer Guide: https://developer.apple.com/library/safari/#documentation/AppleApplications/Reference/SafariWebContent/Client-SideStorage/Client-SideStorage.html#//apple_ref/doc/uid/TP40002051-CH4-SW4