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.htaccess for missing images with wildcards


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Brian Miller

I have a folder full of product images. And the image file name is something akin to:
 

/images/product_15_small.jpg
/images/product_15_large.jpg
/images/product_201_small.jpg
/images/product_201_large.jpg
/images/product_47502_small.jpg
/images/product_47502_large.jpg

 

If there is an error in the upload process and one of the files doesn't get created, say "/images/product_201_large.jpg", I'd like Apache to replace that file with this file: "/images/missing_0_large.jpg".  And in the case of the smaller image, I want it to be replaced with: "/images/missing_0_small.jpg".

 

I'm not sure how to do conditional RedirectMatch using HT access and a wildcard. Could someone guide me?  Here are the rules that I've tried to experiment with but none of them worked:

 

#TEST 1:
RedirectMatch 404 ^images/product_(\d+)_small.jpg	images/missing_(\d+)_small.jpg
RedirectMatch 404 ^images/product_(\d+)_large.jpg	images/missing_(\d+)_large.jpg


#TEST 2:
RewriteRule ^images/product_(\d+)_small.jpg		images/missing_(\d+)_small.jpg [L]
RewriteRule ^images/product_(\d+)_large.jpg		images/missing_(\d+)_large.jpg [L]

 

From the example above, "TEST 1" doesn't work however it seems to be the most logical format.

"TEST 2" does work, but it always redirects, and I want it to only redirect when the target file is missing (during a 404).

 

Please can an Apache expert help me?

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DaveLegg

If you add

RewriteCond %{REQUEST_FILENAME} -f

above each of your RewriteRule lines from "Test 2", that should do what you're after. It's basically adding a condition to the rule, that makes the rule only apply if the file doesn't exist

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Brian Miller

Thanks Dave,

So I added this to the .htaccess file:

 

<IfModule mod_rewrite.c>
  RewriteCond %{REQUEST_FILENAME} -f
  RewriteRule ^images/product_(\d+)_small.jpg	images/missing_0_small.jpg [L]
  RewriteRule ^images/product_(\d+)_large.jpg	images/missing_0_large.jpg [L]
 </IfModule>

 

But I still get a standard 404 error when I access files such as this missing image:

 

https://localhost/images/product_123_large.jpg

 

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DaveLegg

You need the condition for each rewrite rule, otherwise it only applies to the first

 

  RewriteCond %{REQUEST_FILENAME} -f
  RewriteRule ^images/product_(\d+)_small.jpg	images/missing_0_small.jpg [L]
  RewriteCond %{REQUEST_FILENAME} -f
  RewriteRule ^images/product_(\d+)_large.jpg	images/missing_0_large.jpg [L]

 

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Brian Miller

Thanks Dave, however that version is still loading the missing version of the image when the file is physically present. 

And when the file is not physically present, it doesn't replace it with the missing version.

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DaveLegg

Ah, my mistake, try this

 

RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^images/product_(\d+)_small.jpg	images/missing_0_small.jpg [L]
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^images/product_(\d+)_large.jpg	images/missing_0_large.jpg [L]

 

The ! makes the condition negative

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Brian Miller

Thank you so much, Dave!

Thank worked a treat!!! :0)

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