Created
August 28, 2024 17:35
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| #!/usr/bin/env python3 | |
| import io | |
| import libxml2 | |
| import xml.sax.xmlreader | |
| from drv_libxml2 import LibXml2Reader | |
| def parse_binary(): | |
| source = xml.sax.xmlreader.InputSource() | |
| source.setByteStream(io.BytesIO(b'<?xml version="1.0" encoding="UTF-8"?>\n<root />\n')) | |
| return LibXml2Reader().parse(source) | |
| def parse_text(): | |
| source = xml.sax.xmlreader.InputSource() | |
| source.setCharacterStream(io.StringIO('<?xml version="1.0"?>\n<root />\n')) | |
| return LibXml2Reader().parse(source) | |
| # Succeeds (prints "None") | |
| print(parse_binary()) | |
| # Fails, and prints: | |
| # | |
| # xmlPythonFileRead: result is not a String | |
| # <unknown>:1:-1: Unknown IO error | |
| # | |
| # None | |
| # | |
| print(parse_text()) | |
| # Root cause is that LibXml2Reader.parse() does [1]: | |
| # | |
| # input = libxml2.inputBuffer(source.getByteStream()) | |
| # | |
| # but since source.getByteStraem() returns None, this creates an ioWrapper that | |
| # only ever returns -1 [2], triggering the "result is not a String" errror [3]. | |
| # | |
| # 1. https://github.com/GNOME/libxml2/blob/master/python/drv_libxml2.py#L149 | |
| # 2. https://github.com/GNOME/libxml2/blob/67ff748c3eba93745a09157e11759d09f864492f/python/libxml.py#L73-L74 | |
| # 3. https://github.com/GNOME/libxml2/blob/67ff748c3eba93745a09157e11759d09f864492f/python/libxml.c#L333 |
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