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Merge pull request #5639 from uploadcare/jpeg-safe-dpi-read

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Add TypeError handling to pass corrupted DPI value in EXIF
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Alexander Karpinsky 2021-08-02 14:34:54 +03:00 committed by GitHub
commit a312b0e9d0
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3 changed files with 11 additions and 2 deletions
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Tests/images/broken_exif_dpi.jpg Normal file
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9
Tests/test_file_jpeg.py
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@ -718,6 +718,15 @@ class TestFileJpeg:
# This should return the default, and not raise a ZeroDivisionError
assert im.info.get("dpi") == (72, 72)
def test_dpi_exif_string(self):
# Arrange
# 0x011A tag in this exif contains string '300300\x02'
with Image.open("Tests/images/broken_exif_dpi.jpg") as im:
# Act / Assert
# This should return the default
assert im.info.get("dpi") == (72, 72)
def test_no_dpi_in_exif(self):
# Arrange
# This is photoshop-200dpi.jpg with resolution removed from EXIF:

4
src/PIL/JpegImagePlugin.py
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@ -168,11 +168,11 @@ def APP(self, marker):
# 1 dpcm = 2.54 dpi
dpi *= 2.54
self.info["dpi"] = dpi, dpi
except (KeyError, SyntaxError, ValueError, ZeroDivisionError):
except (TypeError, KeyError, SyntaxError, ValueError, ZeroDivisionError):
# SyntaxError for invalid/unreadable EXIF
# KeyError for dpi not included
# ZeroDivisionError for invalid dpi rational value
# ValueError for dpi being an invalid float
# ValueError or TypeError for dpi being an invalid float
self.info["dpi"] = 72, 72