web2py renames the uploaded filenames as tablename+code+hash.extension The total len(tablename+code+hash+extension)<=512 This means len(hash) <= 512 - len(tablename+code+extension) The hash is a base64 encoded of the original filename. If this hash exceeds 512 - len(tablename+code+extension) the file is truncated. Mind this is still a lot of characters.
Massimo On Monday, 20 July 2015 20:36:50 UTC-5, Scott Hunter wrote: > > Is this an oversight or a conscious decision? If I understand you, if > one's filesystem allowed filenames greater than 512 characters, long-enough > but still legal names will still be truncated, and thus thwart the ability > to extract the original file name. That could be a nasty surprise. > > P.S. As I understand it, it is a permanent filename. > > On Monday, July 20, 2015 at 8:47:36 AM UTC-4, Massimo Di Pierro wrote: >> >> Nowhere. We only state that Field(..., lenght=....) is a parameter. We do >> not say that for "upload" fields this is also the length of the tmp >> filename. >> >> On Monday, 20 July 2015 05:28:02 UTC-5, Scott Hunter wrote: >>> >>> Where is this spelled out in the documentation? I could not find it. >>> >>> - Scott >>> >>> On Monday, July 20, 2015 at 2:24:24 AM UTC-4, Massimo Di Pierro wrote: >>>> >>>> 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) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
