解决Django的request.POST获取不到内容的问题
我通过如下的一段程序发送post请求:
import urllib3 pool = urllib3.connection_from_url('http://127.0.0.1:8090') resp = pool.request('POST', '/polls/', fields={'key1':'value1', 'key2':'value2'}, headers={'Content-Type':'application/json'}, encode_multipart=False)
在服务器端我用request.POST期望能获取到<QueryDict: {u'key2': [u'value2'], u'key1': [u'value1']}>,但是我发现获取到的是一个空的<QueryDict: {}>,用reqyest.body是能获取到原始的请求内容key2=value2&key1=value1的。
这个时候只能去文档中找答案了,但是貌似Django中的文档也没给出我答案,这时候我就只能通过源码来找答案了,下面是class HttpRequest(object)中获取POST QueryDict的函数部分:
def _load_post_and_files(self): """Populate self._post and self._files if the content-type is a form type""" if self.method != 'POST': self._post, self._files = QueryDict(encoding=self._encoding), MultiValueDict() return if self._read_started and not hasattr(self, '_body'): self._mark_post_parse_error() return if self.content_type == 'multipart/form-data': if hasattr(self, '_body'): # Use already read data data = BytesIO(self._body) else: data = self try: self._post, self._files = self.parse_file_upload(self.META, data) except MultiPartParserError: # An error occurred while parsing POST data. Since when # formatting the error the request handler might access # self.POST, set self._post and self._file to prevent # attempts to parse POST data again. # Mark that an error occurred. This allows self.__repr__ to # be explicit about it instead of simply representing an # empty POST self._mark_post_parse_error() raise elif self.content_type == 'application/x-www-form-urlencoded': self._post, self._files = QueryDict(self.body, encoding=self._encoding), MultiValueDict() else: self._post, self._files = QueryDict(encoding=self._encoding), MultiValueDict()
函数看起来有点长,但是我们只要关注后面的if elif else这三个分支即可,从elif self.content_type == 'application/x-www-form-urlencoded':这个分支能看到只有请求header中的'Content-Type':'application/x-www-form-urlencoded'才会填充request.POST,其它情况下只有一个空的<QueryDict: {}>。
从这个问题也看到了Django对'Content-Type':'application/json'没有做任何处理,跟我预想的有一点不一样。
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