write 如何在Python中針對DTD文件驗證xml




xml etree elementtree write xml (2)

來自libxml2 python綁定中的examples目錄:

#!/usr/bin/python -u
import libxml2
import sys

# Memory debug specific
libxml2.debugMemory(1)

dtd="""<!ELEMENT foo EMPTY>"""
instance="""<?xml version="1.0"?>
<foo></foo>"""

dtd = libxml2.parseDTD(None, 'test.dtd')
ctxt = libxml2.newValidCtxt()
doc = libxml2.parseDoc(instance)
ret = doc.validateDtd(ctxt, dtd)
if ret != 1:
    print "error doing DTD validation"
    sys.exit(1)

doc.freeDoc()
dtd.freeDtd()
del dtd
del ctxt

我需要針對DTD描述文件驗證XML字符串(而不是文件)。

怎麼能在python完成?


另一個不錯的選擇是lxml的驗證 ,我發現它非常令人愉快。

從lxml站點獲取的一個簡單示例:

from StringIO import StringIO

from lxml import etree

dtd = etree.DTD(StringIO("""<!ELEMENT foo EMPTY>"""))
root = etree.XML("<foo/>")
print(dtd.validate(root))
# True

root = etree.XML("<foo>bar</foo>")
print(dtd.validate(root))
# False
print(dtd.error_log.filter_from_errors())
# <string>:1:0:ERROR:VALID:DTD_NOT_EMPTY: Element foo was declared EMPTY this one has content




dtd