On Mon, Oct 8, 2012 at 1:06 PM, ptone <pres...@ptone.com> wrote: > While git may be common, and your problem not unique - this is still a > condition of your dev environment rendering modification dates invalid. > There might be other situations where this is the case (I've run into > scripts that muck with modification dates based on camera/jpeg metadata). > > So after some further discussion on IRC - it was determined that md5, > while somewhat common, was far from a standard, and was likely not to be > available as remote call for network based storage backends. And so the > final resolution is to wontfix the ticket. > > In the end - this lack of a universal fingerprint is just a limitation of > our storage tools. > > -Preston >
Is there a reason this fingerprint must be universal? If you're dealing with a backend like S3, where network latency and expensive writes are a problem, but md5 is a builtin remote call (available on any GET), why not just do an md5 sum in the _save() method? Basically, just buffer the File object you receive, take an md5 in python, and then make a decision whether to upload or not. In the common case of reading from local disk and writing to S3, this is a big win, and doesn't require cooperation from any other backends, or standardizing on md5 as a fingerprint method. Best, Alex Ogier -- You received this message because you are subscribed to the Google Groups "Django developers" group. To post to this group, send email to django-developers@googlegroups.com. To unsubscribe from this group, send email to django-developers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-developers?hl=en.
