[OpenLayers-Users] Possible pink tile fix

[Ben Brehmer]

Eric Lemoine wrote:

>On Jan 11, 2008 7:12 PM, Ben Brehmer <bbrehmer at refractions.net> wrote:
>  
>
>>Hello all,
>>
>>I just wanted to throw this out there as it might be useful to others;
>>We'd been having some problems with pink tiles, even with
>>IMAGE_RELOAD_ATTEMPTS set to a large number (10). The tile reload would
>>max out and the tile still wouldn't load properly in IE6 & 7. But adding
>>a dynamic dummy parameter to the problem images' URL seems to have
>>solved the problem.
>>
>>In the Util.js::onImageLoadError() function we simply modify the src of
>>the tile:
>>
>>var tmp_src = this.src;
>>this.src = tmp_src+"&retry="+this._attempts;
>>
>>This allows you to monitor how many times an image fails to load from
>>your server logs as well.
>>    
>>
>
>Ben,
>
>Thanks for sharing this thing. Was your problem related to some cache
>effect in IE?
>
>--
>Eric
>  
>
Eric,

I can't say for certain, but I have a suspicion that IE is caching 
failed images and not reloading them properly. Changing the URL seems to 
cause IE to register that this is a new image. But the key seems to be 
the dynamic URL. I've modified the 'alt' attribute in the past which 
seemed to work, but less effectively.

Ben