在Python中解析分块内容类型的响应

Question

我正在尝试用Python读取和解析一种叫做“分块传输”的请求。这种请求的内容类型是“chunked”。当我在浏览器中打开这个网址并查看源代码时，我看到的内容是这样的：

<!-- ---------------------------------------------------------------- http://github.com/Atmosphere ------------------------------------------------------------------------ --> 
<!-- Welcome to the Atmosphere Framework. To work with all the browsers when suspending connection, Atmosphere must output some data to makes WebKit based browser working.--> 
<!-- --------------------------------------------------------------------------------------------------------------------------------------------------------------------- --> 
<!-- EOD -->[{"__publicationName":"dip\/acc\/LHC\/Beam\/Intensity\/Beam2","value":"2.505730663333334E9"},  {"__publicationName":"dip\/acc\/LHC\/Beam\/Intensity\/Beam1","value":"1.5584484E9"},{"__publicationName":"dip\/acc\/LHC\/Beam\/Energy","value":"495"},

我想提取并解析像这样的JSON数据：

{"__publicationName":"dip\/acc\/LHC\/Beam\/Intensity\/Beam2","value":"2.505730663333334E9"}

我该怎么做呢？

谢谢！

Answer 1

"chunked" 不是一个有效的内容类型，虽然它是一个有效的 传输编码。根据你提供的示例，这似乎不是你的问题。这看起来像是应用于普通 jsonp 响应的一个头部。在很多情况下，浏览器会忽略这些 sgml 注释，但你需要手动提取它们以供自己使用。这里有一个处理这个问题的思路：

>>> import json
>>> corpus = '''<!-- ---------------------------------------------------------------- http://github.com/Atmosphere ------------------------------------------------------------------------ --> 
... <!-- Welcome to the Atmosphere Framework. To work with all the browsers when suspending connection, Atmosphere must output some data to makes WebKit based browser working.--> 
... <!-- --------------------------------------------------------------------------------------------------------------------------------------------------------------------- --> 
... <!-- EOD -->[{"__publicationName":"dip\/acc\/LHC\/Beam\/Intensity\/Beam2","value":"2.505730663333334E9"},  {"__publicationName":"dip\/acc\/LHC\/Beam\/Intensity\/Beam1","value":"1.5584484E9"},{"__publicationName":"dip\/acc\/LHC\/Beam\/Energy","value":"495"}]'''
>>> junk, data = corpus.split('<!-- EOD -->', 1)
>>> parsed = json.loads(data)
>>> for item in parsed:
...     print item
... 
{u'__publicationName': u'dip/acc/LHC/Beam/Intensity/Beam2', u'value': u'2.505730663333334E9'}
{u'__publicationName': u'dip/acc/LHC/Beam/Intensity/Beam1', u'value': u'1.5584484E9'}
{u'__publicationName': u'dip/acc/LHC/Beam/Energy', u'value': u'495'}