id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 19457 ImageField size detection fails for some files even when PIL could succeed Stephen Burrows Anton Baklanov "Some PNG files can't have their size detected by django because the clever method of size detection Django employs (I suspect in order to be somewhat more efficient?) fails horribly in these cases. {{{ >>> import Image >>> with open('/path/to/file.png') as f: ... im = Image.open(f) ... >>> im.size (480, 362) >>> from django.core.files.images import get_image_dimensions >>> with open('/path/to/file.png') as f: ... get_image_dimensions(f) ... Traceback (most recent call last): File """", line 2, in File ""django/core/files/images.py"", line 58, in get_image_dimensions p.feed(data) File ""PIL/ImageFile.py"", line 402, in feed im = Image.open(fp) File ""PIL/Image.py"", line 1965, in open return factory(fp, filename) File ""PIL/ImageFile.py"", line 91, in __init__ self._open() File ""PIL/PngImagePlugin.py"", line 331, in _open s = self.png.call(cid, pos, len) File ""PIL/PngImagePlugin.py"", line 115, in call return getattr(self, ""chunk_"" + cid)(pos, len) File ""PIL/PngImagePlugin.py"", line 296, in chunk_zTXt self.im_info[k] = self.im_text[k] = zlib.decompress(v[1:]) error: Error -5 while decompressing data: incomplete or truncated stream }}}" Bug closed File uploads/storage 1.4 Normal fixed image antonbaklanov@… Accepted 1 0 0 0 0 0