in Docker while parsing: XMLSyntaxError: Document is empty

[Ivan Pogrebkov]

This script fails in any docker container i tried (ubuntu, alpine, ol8) but runs fine on mac locally. seems like its libxml2 2.9.14 version issue.

from requests import get
from lxml import etree
r = get('https://printbar.ru/synsfiles/yandex/market/idrr_full.xml')
with open('test.xml', 'wb') as f:
    f.write(r.content)

lines = []
tree = etree.iterparse(source='test.xml', events=('end',))
try:
    for (ev, el) in tree:
        lines.append(el.sourceline)
finally:
    print(max(lines))

===== docker python3.10-slim (ol8) conf:

Python : sys.version_info(major=3, minor=10, micro=0, releaselevel='final', serial=0)
lxml.etree : (4, 9, 1, 0)
libxml used : (2, 9, 14)
libxml compiled : (2, 9, 14)
libxslt used : (1, 1, 35)
libxslt compiled : (1, 1, 35)

===== docker python3.10-slim (ol8) eror:

Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "src/lxml/iterparse.pxi", line 210, in lxml.etree.iterparse.__next__
  File "src/lxml/iterparse.pxi", line 195, in lxml.etree.iterparse.__next__
  File "src/lxml/iterparse.pxi", line 230, in lxml.etree.iterparse._read_more_events
  File "src/lxml/parser.pxi", line 1376, in lxml.etree._FeedParser.feed
  File "src/lxml/parser.pxi", line 606, in lxml.etree._ParserContext._handleParseResult
  File "src/lxml/parser.pxi", line 615, in lxml.etree._ParserContext._handleParseResultDoc
  File "src/lxml/parser.pxi", line 725, in lxml.etree._handleParseResult
  File "src/lxml/parser.pxi", line 654, in lxml.etree._raiseParseError
  File "test.xml", line 1
lxml.etree.XMLSyntaxError: Document is empty, line 1, column 1

===== docker ubuntu:latest conf:

Python : sys.version_info(major=3, minor=10, micro=6, releaselevel='final', serial=0)
lxml.etree : (4, 9, 1, 0)
libxml used : (2, 9, 14)
libxml compiled : (2, 9, 14)
libxslt used : (1, 1, 35)
libxslt compiled : (1, 1, 35)

===== docker ubuntu:latest error:

Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "src/lxml/iterparse.pxi", line 210, in lxml.etree.iterparse.__next__
  File "src/lxml/iterparse.pxi", line 195, in lxml.etree.iterparse.__next__
  File "src/lxml/iterparse.pxi", line 230, in lxml.etree.iterparse._read_more_events
  File "src/lxml/parser.pxi", line 1376, in lxml.etree._FeedParser.feed
  File "src/lxml/parser.pxi", line 606, in lxml.etree._ParserContext._handleParseResult
  File "src/lxml/parser.pxi", line 615, in lxml.etree._ParserContext._handleParseResultDoc
  File "src/lxml/parser.pxi", line 725, in lxml.etree._handleParseResult
  File "src/lxml/parser.pxi", line 654, in lxml.etree._raiseParseError
  File "test.xml", line 1
lxml.etree.XMLSyntaxError: Document is empty, line 1, column 1

===== and finally mac conf that works fine locally:

Python : sys.version_info(major=3, minor=10, micro=8, releaselevel='final', serial=0)
lxml.etree : (4, 9, 1, 0)
libxml used : (2, 9, 13)
libxml compiled : (2, 9, 13)
libxslt used : (1, 1, 35)
libxslt compiled : (1, 1, 35)

maybe i can downgrade libxml2 version somehow?

[Ivan Pogrebkov (van4oza)]

this file only works on my macs somehow, but not in any containers even with libxml2 2.9.13