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Image with cache busting query string won't load from FTP site in IE11

Posted on 2014-11-13
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Last Modified: 2014-11-20
My web site displays real-time instrumentation using an iFrame that takes content from an FTP server.  That content comprises a web page which references two images (which are also on the FTP server).

I have to pull the content from the FTP server - I have no control over its location and cannot easily copy it to a web server as it is updated every 20secs.

The web page loads into the iFrame fine and refreshes OK (it contains a JavaScript function to reload itself every 20secs).

The problem is with the two images that the page references. The application that generates those images (over which I have no control) adds a cache-busting query string to their URL (in the form image.jpg?dd/mm/yy). This obviously makes sense as the images change every 20secs but their size may not necessarily change so the cache-buster makes sure they are reloaded.

However, while the images load and reload in Firefox they don't in IE11 - IE11 doesn't seem to like query strings in FTP URLs.

Is this a known issue, and is there a work-around?

Thanks

Nigel
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Question by:NAKBrooks
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Expert Comment

by:dgrafx
ID: 40442946
I'm not specifically familiar with your issue but was reading somewhere that IE 11 changed the character encoding for URLs.
I am also not knowledgeable as to if this is what is affecting you.

Here is a link to read through about some of the IE 11 changes - does it fix your problem??? I don't know ...
http://singleconcept.wordpress.com/2013/12/10/internet-explorer-11-dont-call-me-ie/

What you could do is re-write the script_name gotten from the URL leaving off the query_string - then feed that URL to the browser - and if you need a cache-buster then add in your own but this time one that IE 11 and others will all work with.
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Author Comment

by:NAKBrooks
ID: 40444589
Sorry that's not relevant to my issue. I've managed to sort out a workaround so I'll close this question.
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Accepted Solution

by:
NAKBrooks earned 0 total points
ID: 40444592
Didn't resolve the issue but managed to persuade the data owner to load the data onto a website so I could link to it there, rather than from the ftp site.  This resolved my issue.
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Expert Comment

by:dgrafx
ID: 40444594
What is your workaround?
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Author Comment

by:NAKBrooks
ID: 40444596
Data now on web site so no need to link to ftp site therefore issue doesn't arise.
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Expert Comment

by:dgrafx
ID: 40444598
You beat me posting the last comment ...
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Author Closing Comment

by:NAKBrooks
ID: 40454627
Issue resolved by workaround.
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