python post 遇到的问题

我会带着你远行 2022-05-13 06:54 225阅读 0赞

# python post 方法总结 #

通常情况下提交数据一般有两种方式:Ajax和Form表单的方式,一般接收参数可以用request.POST 或者request.Body 。 
     一般当header 传参类型为Contype-type:application/json 时request.POST 得到的数据为空字典或者None，所以可以用request.Body 来获取 
    数据。 
    django Httpresponse 源码如下：

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()

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