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

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佛祖请我去吃肉
佛祖请我去吃肉 2020-12-31 04:36

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

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  • 小鲜肉
    2020-12-31 04:50

    I have now resolved this issue by switching to CherryPy for serving these files :)

    If anyone else becomes similarly stuck but wants to keep the server part simple, the following Python may be sufficient for getting started:

    import cherrypy


class SimpleStaticServer:

    @cherrypy.expose
    def index(self):
        return '<html><body><a href="index.html">Go to the static index page</a></body></html>'


cherrypy.config.update({
        # global
        'server.socket_host': '192.168.0.3',
        'server.socket_port': 80,

        # /static
        'tools.staticdir.on': True,
        'tools.staticdir.dir': "(directory where static files are stored)",
    })
cherrypy.quickstart(SimpleStaticServer())

    If you want to visit the "site" from another device, you'll need to use the external IP address (for me this was 192.168.0.3). Otherwise, you can just use '127.0.0.1' for the 'server.socket_host' value. I then point my browser to http://192.168.0.3/index.html to get my static index page.

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  • 刺人心
    2020-12-31 04:52

    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:

    <html manifest="~/cache.manifest" type="text/cache-manifest">

    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

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  • 青春惊慌失措
    2020-12-31 04:59

    Have you tried anything like https://manifest-validator.appspot.com/ to validate your manifest?

    I've struggled with my manifest file for quite a while, it is really hard to pinpoint what is wrong. Could be something as simple as wrong encoding to an extra line break at the start.

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  • 佛祖请我去吃肉
    2020-12-31 05:04

    Today I experienced exactly the same problem. After hours of working I came the the key point: the format of manifest file. In short, the file must begin a new line ONLY with ascii(0A), not ascii(0D), or ascii(0D + 0A). Only in this way can I live with Chrome, or I will get a blank page, and the error info in the console window.

    According to w3c, (http://www.w3.org/TR/html5/offline.html), in “5.6.3.2 Writing cache manifests”，both 0A, 0D and 0D + 0A are all acceptable. So, my opinion is: Chrome is not compatible with w3c in the point.

    Further more, say, if myapp.js is to be cached, it MUST follow the same rule: begins a new line only with ascii(0A), or Chrome will throw the same info in the console windows.

    My Chrome is 13.0.782.107

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  • 渐次进展
    2020-12-31 05:11

    I have resolved this issue in visual studio for MVC application. follow below steps:

    1. I have created .appcache file in notepad and copy manifest file content into it. (you don't need to create .Manifest file OR not create Manifest.cshtml view. just create .appcache file in notepad.)

    2. give reference as <html manifest="~/example.appcache"> in view and issue will be resolved

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  • 佛祖请我去吃肉
    2020-12-31 05:11

    I think the line

    CACHE:

    is missing in the manifest file (should be the 2nd line, before the list of files.

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