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From Nuno Leitao <>
Subject Re: Computing an md5 of a text field.
Date Tue, 24 Jul 2007 00:22:26 GMT
Thanks Yonik,

Basically, I am indexing a number of items where the unique ID is a  
URL. Because URL's can contain invalid XML characters, and I will be  
doing some XSLT postprocessing, I was thinking that a good way to  
solve the problem would be to store these unique ID's as md5's instead.

I think I found another alternative - it follows the pre-processing  
avenue you suggested.

Best Regards.


On 23 Jul 2007, at 18:25, Yonik Seeley wrote:

> On 7/23/07, Nuno Leitao <> wrote:
>> I would like to be able to compute and store the MD5 sum for a given
>> text in a field (in my case, I am talking about a URL string). For
>> example, if I have a field called 'url' the following would happen:
>> '' -> 'cb4f7e6ca1a0c00b146894b75d9f98dc'
> First, what are you trying to achieve by this?  If you give people the
> higher level problem, they might be able to suggest a better way.
> Since you construct the XML document to send to Solr,
> simply compute the MD5 and add that also:
> <field name="url"></field>
> <field name="urlMD5">cb4f7e6ca1a0c00b146894b75d9f98dc</field>
> Or did you want to store the MD5 instead of the URL?  Did you want it
> searchable somehow?
> -Yonik

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