On 03/08/2012 02:11 PM, Dave Angel wrote: > On 03/08/2012 04:55 PM, Tobiah wrote: >> I'm pulling image data from a database blob, and serving >> it from a web2py app. I have to send the correct >> Content-Type header, so I need to detect the image type. >> >> Everything that I've found on the web so far, needs a file >> name on the disk, but I only have the data. >> >> It looks like the 'magic' package might be of use, but >> I can't find any documentation for it. >> >> Also, it seems like image/png works for other types >> of image data, while image/foo does not, yet I'm afraid >> that not every browser will play along as nicely. >> >> Thanks! >> >> Tobiah > > First step, ask the authors of the database what format of data this > blob is in. > > Failing that, write the same data locally as a binary file, and see what > application can open it. Or if you're on a Linux system, run file on > it. "file" can identify most data formats (not just images) just by > looking at the data. > > That assumes, of course, that there's any consistency in the data coming > out of the database. What happens if next time this blob is an Excel > spreadsheet? >
I should simplify my question. Let's say I have a string that contains image data called 'mystring'. I want to do mime_type = some_magic(mystring) and get back 'image/jpg' or 'image/png' or whatever is appropriate for the image data. Thanks! Tobiah -- http://mail.python.org/mailman/listinfo/python-list
