def getImageInfo(data): data = str(data) size = len(data) height = -1 width = -1 content_type = ''

# handle GIFs if (size >= 10) and data[:6] in ('GIF87a', 'GIF89a'): # Check to see if content_type is correct content_type = 'image/gif' w, h = struct.unpack("<HH", data[6:10]) width = int(w) height = int(h)

# See PNG 2. Edition spec (http://www.w3.org/TR/PNG/) # Bytes 0-7 are below, 4-byte chunk length, then 'IHDR' # and finally the 4-byte width, height elif ((size >= 24) and data.startswith('\211PNG\r\n\032\n') and (data[12:16] == 'IHDR')): content_type = 'image/png' w, h = struct.unpack(">LL", data[16:24]) width = int(w) height = int(h)

# Maybe this is for an older PNG version. elif (size >= 16) and data.startswith('\211PNG\r\n\032\n'): # Check to see if we have the right content type content_type = 'image/png' w, h = struct.unpack(">LL", data[8:16]) width = int(w) height = int(h)

# handle JPEGs elif (size >= 2) and data.startswith('\377\330'): content_type = 'image/jpeg' jpeg = StringIO(data) jpeg.read(2) b = jpeg.read(1) try: while (b and ord(b) != 0xDA): while (ord(b) != 0xFF): b = jpeg.read while (ord(b) == 0xFF): b = jpeg.read(1) if (ord(b) >= 0xC0 and ord(b) <= 0xC3): jpeg.read(3) h, w = struct.unpack(">HH", jpeg.read(4)) break else: jpeg.read(int(struct.unpack(">H", jpeg.read(2)) [0])-2) b = jpeg.read(1) width = int(w) height = int(h) except struct.error: pass except ValueError: pass

return content_type, width, height

On May 29, 9:49 am, Mike <mgi...@gmail.com> wrote: