I have an application for a huge business, which needs many pages, controls etc. The .xap file easily goes up to 50MB. I notice that every time when I load the page, the .xap file got downloaded to my local. However, my users may use 3G network to connect, so it must be very slow if we downlaod the app everytime they open the page. So I was wondering if there is some way I can do the deployment similar to WPF, which only download to local when the version is changed....
Any other suggestion to improve the loading speed is welcomed.
Thanks a lot
First and for most get your web server caching headers sorted. Typically you open the ClientBin folder in IIS Manager and enter the HTTP Response Header section. Set expiry to something like 1 Day (or if you update during normal working hours set to 15 Minutes). Note just because the content expires doesn't mean it will be re-downloaded but it does mean it'll get cached before being used. The browser will inform the server of the version it currently has if it has expired allow the server to simply respond with "go ahead and use that it hasn't changed since the last time you checked".
For such a large system you should seriously consider dividing the app up into multiple dll projects. Then use the Application Library Caching feature found in the main apps project properties. You need to create the appropriate .extmap.xml files for each of your dlls. Many of the SDK and Toolkit dlls have them already. This results in separate .zip files for these dlls being placed in the ClientBin folder and not incorporated into one large Xap. This allows you separate slow moving / never changing code into a set of zips and more frequently changing business code into another set. When you update the app the you only update the changed zips thus reducing the download burden of a new version. (Note this only works with inbrowser based apps).
In the serverlight project option, check the Reduce XAP size by using application library caching.
Related
I'm trying to create a map viewer for an existing C# WinForms application. I've installed and hooked up the GreatMaps (GMap.net) controls no problem and that's all working fine. The quirk in this is that it needs to work offline (as it's an application that gets used by users who aren't always in locations where there's a mobile signal).
The offline cache mode works fine for GMap but, we've got to build the cache beforehand which we can do but, as we need the whole of the UK, will be a pain (especially as we have to go down to street level).
Does anybody know if there any existing cache files that we can download and use? I've looked at downloading OSM files but haven't got the faintest idea how to use them, convert them (into the gmdb format that GMap seems to use).
Any ideas?
Check out VectorTileRenderer (https://github.com/AliFlux/VectorTileRenderer) which has a demo for Gmap.net. All you need is an MBTiles file which you can download for free at OpenMapTiles.org (https://openmaptiles.com/downloads/europe/british-isles/)
I have a Java/Spring MVC WebApp using Angular as the Front End. The ui application is deployed as part of the web app in the src>main>webapp folder. The problem is when I make any changes in the CSS or HTML files, the same are not reflected instantaneously. I have tried clearing cache and hard resetting also but to no avail.
I tried running the app in incognito mode too but it does not work.
Please help.
Specific resources can be reloaded individually if you change the date and time on your files on the server. "Clearing cache" is not as easy as it should be. Instead of clearing cache on my browsers, I realized that "touching" the server files cached will actually change the date and time of the source file cached on the server (Tested on Edge, Chrome and Firefox) and most browsers will automatically download the most current fresh copy of whats on your server (code, graphics any multimedia too). I suggest you just copy the most current scripts on the server and "do the touch thing" solution before your program runs, so it will change the date of all your problem files to a most current date and time, then it downloads a fresh copy to your browser:
<?php
touch('/www/sample/file1.css');
touch('/www/sample/file2.css');
touch('/www/sample/file2.css');
?>
then ... the rest of your program...
It took me some time to resolve this issue (as many browsers act differently to different commands, but they all check time of files and compare to your downloaded copy in your browser, if different date and time, will do the refresh), If you can't go the supposed right way, there is always another usable and better solution to it. Best Regards and happy camping. By the way touch(); or alternatives work in many programming languages inclusive in javascript bash sh php and you can include or call them in html.
We have a project service uploaded in GAE. It is working fine but some time we need to change message string in ini/properties or change any particular image file for that we redeploy the whole application every time.
So as a user point of view. I think there should be a vision to upload a particular component/file from GAE interface.
Use datastore/memcache.
There are no way to update particular file without re-deploying all application files.
FWIW the entire application does not redeploy every time. The appcfg.py tool is smart enough to work out only the files that have changed and push them up, not the entire thing.
Now the problem you might face is that when you redeploy your app, it will result in new instances being started to load the updated files and if you had a lot of in memory state you'd lose it.
This question is almost a reverse of those questions wanting to force the refresh of XAP files.
We have an application that uses Silverlight 4. There is a policy in place though that deletes temporary internet files every time users close IE. Unfortunately all the xap files are deleted too and need to be downloaded next time a user opens Internet Explorer to access the application again.
At the slower sites the download of these 20 MB of files can take some time.
Is it possible to have XAP files downloaded / stored elsewhere on the user's computer rather than the temporary internet files directory?
Can this be programmed into the Silverlight Application or is it an Internet Explorer issue.
What we really need to do is minimise the download restraints without compromising the clean-up of the temporary internet files directory.
Thank you in advance
Out of Browser is certainly the way to go.
The XAP files are handled independently from the browser, and you can even push the installation out with a script.
Using Silverlight 3, I noticed that System.Xml.Linq.dll was added to my XAP file, increasing the size from 12 to 58 k, so I checked the box 'Reduce XAP Size by using application library caching'.
Publishing the app to IIS, then loading it with Web Dev Helper enabled, I see that when I open the app, the XAP file at 12k is loaded, then the System.Xml.Linq.zip is loaded at 46k, for a total of 58k. Whenever I refresh the main page of the app, the same files are loaded into the browser. If I uncheck the 'Reduce..." box, then re-publish the app to IIS, one XAP file at 58k is loaded whenever I load the application.
How is one method different from or better than the other? I could see the advantage if the dll were somehow saved on the client computer removing the need to download it each time the app were opened.
Thanks
Mike Thomas
A browser caches by URL, so by splitting your application into a part which changes frequently and a part which will probably stay the same for a long time (the Linq part) and which might be shared between applications even, you save some download.
But it depends on the exact situation (frequency of change, location of 'generic' DLLs, etc.) whether it really helps.
The whole reason for keeping XAP size small is so that your application loads as quickly as possible. This is important: even on a faster connection, a bloated XAP can take extra seconds to load, which can be long enough for your users to leave your site.
While Linq is only accounting for 46KB, there are other cases where this can make a bigger deal. For instance, the SyndicationFeed class makes it really easy to handle RSS and ATOM feeds, but it weighs in at 114KB.
Application library caching helps in two ways:
It allows for sharing common DLL's between applications, so if another application has already pulled down a system DLL, your app can just reference it.
It allows your application updates to be smaller, since the framework DLL's won't change betwen XAP versions.
The difference is that when dll's are outside of the XAP file even though browser asks for those files webserver responds with 304 Not Modified HTTP response.
By default browser will not request for those files to be downloaded again. This obviously saves time especially when project references "heavy" libraries (ie. Telerik ones can be quite large in size)
Hope this helps someone.