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Merge pull request #44 from radarhere/fix-im-long-name

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Trim end of name, keeping ext
This commit is contained in:
Hugo van Kemenade 2020-02-26 12:57:06 +02:00 committed by GitHub
commit 853e2f25be
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3 changed files with 16 additions and 2 deletions
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Tests/images/hopper_long_name.im Normal file
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9
Tests/test_file_im.py
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@ -1,3 +1,5 @@
import filecmp
import pytest
from PIL import Image, ImImagePlugin
@ -15,6 +17,13 @@ def test_sanity():
assert im.format == "IM"
def test_name_limit(tmp_path):
out = str(tmp_path / ("name_limit_test" * 7 + ".im"))
with Image.open(TEST_IM) as im:
im.save(out)
assert filecmp.cmp(out, "Tests/images/hopper_long_name.im")
@pytest.mark.skipif(is_pypy(), reason="Requires CPython")
def test_unclosed_file():
def open():

9
src/PIL/ImImagePlugin.py
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@ -348,9 +348,14 @@ def _save(im, fp, filename):
fp.write(("Image type: %s image\r\n" % image_type).encode("ascii"))
if filename:
# Each line must be under length 100, or: SyntaxError("not an IM file")
# Each line must be 100 characters or less,
# or: SyntaxError("not an IM file")
# 8 characters are used for "Name: " and "\r\n"
# Keep just the filename, ditch the potentially overlong path
fp.write(("Name: %s\r\n" % os.path.basename(filename)).encode("ascii"))
name, ext = os.path.splitext(os.path.basename(filename))
name = "".join([name[: 92 - len(ext)], ext])
fp.write(("Name: %s\r\n" % name).encode("ascii"))
fp.write(("Image size (x*y): %d*%d\r\n" % im.size).encode("ascii"))
fp.write(("File size (no of images): %d\r\n" % frames).encode("ascii"))
if im.mode in ["P", "PA"]: