This is handled by web2py. The filenames are truncated according to the 
size of the uploadfield. This defaults to 512. In new versions of windows 
the make file length has been reduced so you have to do

Field(name, 'upload', size=200)

and all filenames will be limited to 200 bytes.

On Sunday, 19 July 2015 21:06:42 UTC-5, Scott Hunter wrote:
>
> This is not only an issue with Windows; any filesystem with a filename 
> limit (however big) can hit this problem.  As this is all being handled by 
> web2py, and the user is selecting the file to upload, where would this 
> "logic" go, and why isn't web2py handling it?
>
> - Scott
>
> On Saturday, March 16, 2013 at 1:04:28 PM UTC-4, Niphlod wrote:
>>
>> I was wrong. the first part of the "hash" is a uuid, the second is a 
>> base16 encoding of the original filename.
>>
>> Seems that you need some logic to cut down long files if you plan to host 
>> on Windows.
>>
>> http://web2py.com/books/default/chapter/29/07?search=uploads#Storing-the-original-filename
>>  
>> <http://www.google.com/url?q=http%3A%2F%2Fweb2py.com%2Fbooks%2Fdefault%2Fchapter%2F29%2F07%3Fsearch%3Duploads%23Storing-the-original-filename&sa=D&sntz=1&usg=AFQjCNHoAJ_7v4pFTQfLJ7w7itNYEBhoPw>
>>
>

-- 
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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