On 27-Aug-2010, at 1:57 AM, MRAB wrote: > On 26/08/2010 21:14, Navkirat Singh wrote: >> >> On 27-Aug-2010, at 1:32 AM, Dave Angel wrote: >> >>> Navkirat Singh wrote: >>>> Hey guys, >>>> >>>> I am programming a webserver, I receive a jpeg file with the POST >>>> method.The file (.jpeg) is encoded in bytes, I parse the bytes by >>>> decoding them to a string. I wanted to know how i could write the >>>> file (now a string) as a jpeg image on disk. When I try to encode the >>>> same string to a bytes and write them in binary format to disk, the >>>> file is not recognized as jpeg. I would be grateful if someone could >>>> help me with this. >>>> >>>> >>>> Regards, >>>> Nav >>> If by "decoding them to a string" you mean converting to Unicode, then >>> you've already trashed the data. That's only valid if the bytes had >>> been encoded from valid Unicode characters, and then only if you use >>> the corresponding decoding technique. >>> >>> If you mean some other decoding, then the question is meaningless >>> without telling us just what the decoding is, preferably with some code. >>> >>> It also might be useful to know what version of Python you're using, >>> when you post the code. >>> >>> DaveA >>> >> >> Dave, >> >> I am using Python3 and I receive a byte stream with a jpeg attached sent >> by the web browser over a socket, which looks like this: >> >> b': image/jpeg\r\nAccept: text/*\r\nReferer: >> http://127.0.0.1:8001/\r\nAccept-Language: en-us\r\nAccept-Encoding: >> gzip, deflate\r\nContent-Length: 91783\r\nConnection: >> keep-alive\r\n\r\n\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x00\x00\x01\x00\x01\x00\x00\xff\xdb\x00\x84\x00\x03\x02\x02\x03\x02\x02\x03\x03\x03\x03\x04\x03\x03\x04\x05\x08\x05\x05\x04\x04\x05\n\x07\x07\x06\x08\x0c\n\x0c\x0c\x0b\n\x0b\x0b\r\x0e\x12\x10\r\x0e\x11\x0e\x0b\x0b\x10\x16\x10\x11\x13\x14\x15\x15\x15\x0c\x0f >> >> From the above, I need to: >> >> a) Split the header content from the image content, which comes after >> the keep-alive\r\n\r\n part >> >> b) Then write the image content to file for further use as a jpeg. >> > Try: > > image = header.split(b'keep-alive\r\n\r\n', 1)[-1] > open(image_path, 'wb').write(image) > -- > http://mail.python.org/mailman/listinfo/python-list
I think I forgot to mention that the original is a stream of bytes decoded using ISO-8859-1 as utf-8 trhrew errors (lack of knowlegdge again). @MRAB - the split() method in python 3 works only on strings and throws an error if I try to use bytes -- http://mail.python.org/mailman/listinfo/python-list