不支持具有编码声明的XML Unicode字符串 [英] XML Unicode strings with encoding declaration are not supported

问题描述

尝试执行以下操作...

  from lxml import etree 
 from lxml.etree import fromstring 
 
如果request.POST：
 parser = etree.XMLParser（ns_clean = True，recover = True）
h = fromstring（request.POST ['xml']，parser = parser） 
 return HttpResponse（h.cssselect（'itagg_delivery_receipt status'）。text_content（））
  

但是它给出了这个错误：

  [Fri Apr 05 10:27:54 2013] [error] Internal Server Error：/ sms / status_postback / 
 [Fri Apr 05 10:27:54 2013] [error]追溯（最近的电话最后）：
 [Fri Apr 05 10:27:54 2013] [error] File/ usr / local / lib / python2.7 / dist-packages / django / core / handlers / base.py，第115行，get_response 
 [Fri Apr 05 10:27:54 2013] [error] response =回调（请求，* callback_args，** callback_kwargs）
 [Fri Apr 05 10:27:54 2013] [error] File/usr/local/lib/python2.7/dist-packages/django/views/装饰器/ csrf.py，第77行ped_view 
 [Fri Apr 05 10:27:54 2013] [error] return view_func（* args，** kwargs）
 [Fri Apr 05 10:27:54 2013] [error] File/ srv / project / livewireSMS / sms / views.py，第42行，update_delivery_status 
 [Fri Apr 05 10:27:54 2013] [error] h = fromstring（request.POST ['xml']，parser = parser）
 [Fri Apr 05 10:27:54 2013] [error]文件lxml.etree.pyx，第2754行，在lxml.etree.fromstring（src / lxml / lxml.etree.c： 54631）
 [Fri Apr 05 10:27:54 2013] [error]文件parser.pxi，第1569行，lxml.etree._parseMemoryDocument（src / lxml / lxml.etree.c：82659）
 [Fri Apr 05 10:27:54 2013] [error] ValueError：不支持具有编码声明的Unicode字符串。 
  

这是XML

 <？xml version =1.1encoding =ISO-8859-1？> 
< itagg_delivery_receipt> 
< version> 1.0< / version> 
< msisdn> 447889000000< / msisdn> 
< submission_ref> 
 845tgrgsehg394g3hdfhhh56445y7ts6< / 
 submission_ref> 
< status>已传送< / status> 
< reason> 4< / reason> 
< timestamp> 20050709120945< / timestamp> 
< retry> 0< / retry> 
< / itagg_delivery_receipt> 
  

我无法控制来自SMS公司的xml文档。

解决方案

您必须对其进行编码，然后在解析器中强制使用相同的编码：

来自lxml import etree
from lxml.etree import fromstring

如果request.POST：
xml = request.POST [' xml']。编码（'utf-8'）
parser = etree.XMLParser（ns_clean = True，recover = True，encoding ='utf-8'）
h = fromstring（xml，parser = parser ）

return HttpResponse（h.cssselect（'delivery_reciept status'）。text_content（））

Trying to do the following...

from lxml import etree
from lxml.etree import fromstring

if request.POST:
    parser = etree.XMLParser(ns_clean=True, recover=True)
    h = fromstring(request.POST['xml'], parser=parser)
    return HttpResponse(h.cssselect('itagg_delivery_receipt status').text_content())

but it give this error:

[Fri Apr 05 10:27:54 2013] [error] Internal Server Error: /sms/status_postback/
[Fri Apr 05 10:27:54 2013] [error] Traceback (most recent call last):
[Fri Apr 05 10:27:54 2013] [error]   File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 115, in get_response
[Fri Apr 05 10:27:54 2013] [error]     response = callback(request, *callback_args, **callback_kwargs)
[Fri Apr 05 10:27:54 2013] [error]   File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/csrf.py", line 77, in wrapped_view
[Fri Apr 05 10:27:54 2013] [error]     return view_func(*args, **kwargs)
[Fri Apr 05 10:27:54 2013] [error]   File "/srv/project/livewireSMS/sms/views.py", line 42, in update_delivery_status
[Fri Apr 05 10:27:54 2013] [error]     h = fromstring(request.POST['xml'], parser=parser)
[Fri Apr 05 10:27:54 2013] [error]   File "lxml.etree.pyx", line 2754, in lxml.etree.fromstring (src/lxml/lxml.etree.c:54631)
[Fri Apr 05 10:27:54 2013] [error]   File "parser.pxi", line 1569, in lxml.etree._parseMemoryDocument (src/lxml/lxml.etree.c:82659)
[Fri Apr 05 10:27:54 2013] [error] ValueError: Unicode strings with encoding declaration are not supported.

this is the XML

 <?xml version="1.1" encoding="ISO-8859-1"?>
<itagg_delivery_receipt>
<version>1.0</version>
<msisdn>447889000000</msisdn>
<submission_ref>
845tgrgsehg394g3hdfhhh56445y7ts6</
submission_ref>
<status>Delivered</status>
<reason>4</reason>
<timestamp>20050709120945</timestamp>
<retry>0</retry>
</itagg_delivery_receipt> 

I don't have control over the xml document this comes from the SMS company.

解决方案

You'll have to encode it and then force the same encoding in the parser:

from lxml import etree
from lxml.etree import fromstring

if request.POST:
    xml = request.POST['xml'].encode('utf-8')
    parser = etree.XMLParser(ns_clean=True, recover=True, encoding='utf-8')
    h = fromstring(xml, parser=parser)

    return HttpResponse(h.cssselect('delivery_reciept status').text_content())

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