Question

我有一个包含CDATA的XML，其中包含带有＆符号的URL标记。我应该使用lxml来读取这些标签，但我收到一个错误。

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "src\lxml\lxml.etree.pyx", line 3228, in lxml.etree.fromstring (src\lxml\lxml.etree.c:79593)
  File "src\lxml\parser.pxi", line 1848, in lxml.etree._parseMemoryDocument (src\lxml\lxml.etree.c:119112)
  File "src\lxml\parser.pxi", line 1729, in lxml.etree._parseDoc (src\lxml\lxml.etree.c:117670)
  File "src\lxml\parser.pxi", line 1063, in lxml.etree._BaseParser._parseUnicodeDoc (src\lxml\lxml.etree.c:111657)
  File "src\lxml\parser.pxi", line 595, in lxml.etree._ParserContext._handleParseResultDoc (src\lxml\lxml.etree.c:105880)
  File "src\lxml\parser.pxi", line 706, in lxml.etree._handleParseResult (src\lxml\lxml.etree.c:107588)
  File "src\lxml\parser.pxi", line 635, in lxml.etree._raiseParseError (src\lxml\lxml.etree.c:106442)
  File "<string>", line 9
lxml.etree.XMLSyntaxError: EntityRef: expecting ';', line 9, column 98

我怎么能错过这个错误？我在做对吗？我们需要更换＆amp;什么？

代码如下

from lxml import etree
ns0_NAMESPACE = "http://webservices.online.webapp.paperless.cl"
ns0 = "{%s}" % ns0_NAMESPACE
NSMAP = {'ns0':ns0_NAMESPACE}

response="""
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
    <soapenv:Body>
    <ns:OnlineGeneration2Response xmlns:ns="http://webservices.online.webapp.cl">
        <ns:return>
            <![CDATA[<EstadoDoc>
            <Estado>Ok<Estado>
            <RutEmisor>81201000-K</RutEmisor>
            <TipoDte>52</TipoDte>
            <FolioM>117620901</FolioM>
            <Folio>25022</Folio>
            <Glosa>NO INFORMADO</Glosa>
            <UrlDte>http://G500603svGLH:8080/Facturacion/XMLServlet?docId=&uR1v4VhQHvkPrUZDtY6hMg==</UrlDte>
            </EstadoDoc>
            <EstadoLote>
                <UrlPdf>http://G500603svGLH:8080/Facturacion/PDFServlet?docId=uR1v4VhQHvmQJLl22c1DFOLW3c4qbQ47</UrlPdf>
                <UrlCaratula>http://G500603svGLH:8080/Facturacion/XMLServlet?docId=&uR1v4VhQHvmQJLl22c1DFOLW3c4qbQ47</UrlCaratula>
            </EstadoLote>]]>
        </ns:return>
    </ns:OnlineGeneration2Response>
    </soapenv:Body>
</soapenv:Envelope>"""
root=etree.fromstring(response)
sub_element=root.xpath('//ns0:return',namespaces=NSMAP)
print sub_element.text
if sub_element:
    sub_element=sub_element[0]
EstadoDoc_root=etree.fromstring(sub_element.text)

Answer 1

问题是<ns:return>元素的文本（CDATA部分）的内容不是合法的XML。如果您在将&替换为&之前将其etree.fromstring传递给<?php for($i = 1; $i < $days_count; $i++){ $make_date = date("Y-m")."-".$i; $set_attendance_for_day=false; foreach($attend['attendance'] as $att){ if($att['date'] == $make_date){ $set_attendance_for_day=true; ?> <td><?php echo $att['attendance']; ?></td> <?php } ?> <?php } ?> <?php if (!$set_attendance_for_day) { ?> <td>-</td> <?php } else{ ?> <td>P</td> <?php } ?> <?php }?>，则解析应该会成功。
通常，将XML隐藏在CDATA部分并不是一个好主意;这只是它可能导致问题的一个问题。如果您对生成此XML的一方有任何影响，我建议您尝试让它们进行更改。

Answer 2

使用XML解析器的恢复选项：

parser = etree.XMLParser(recover=True)

EstadoDoc_root = etree.fromstring(sub_element.text, parser=parser)

然后抓取URL（或将其更改为您需要的任何内容）：

print [x.text for x in EstadoDoc_root.xpath('//UrlCaratula|//UrlPdf')]

['http://G500603svGLH:8080/Facturacion/PDFServlet?docId=uR1v4VhQHvmQJLl22c1DFOLW3c4qbQ47',
 'http://G500603svGLH:8080/Facturacion/XMLServlet?docId=']

第二个网址缺少＆amp;之后的网址部分。 ......有办法避免这种情况吗？

使用html解析器来规范化和处理违规字符（注意小写标记）

from lxml import html
EstadoDoc_root = html.fromstring(sub_element)

print [x.text for x in EstadoDoc_root.xpath('//urlcaratula|//urlpdf')]

['http://G500603svGLH:8080/Facturacion/PDFServlet?docId=uR1v4VhQHvmQJLl22c1DFOLW3c4qbQ47',
 'http://G500603svGLH:8080/Facturacion/XMLServlet?docId=&uR1v4VhQHvmQJLl22c1DFOLW3c4qbQ47']

lxml和CDATA和＆amp;

2 个答案: