django rest framework之解析器的源码流程剖析

在初始化Request的时候：

 1     def initialize_request(self, request, *args, **kwargs):
 2         """
 3         Returns the initial request object.
 4         """
 5         parser_context = self.get_parser_context(request)
 6 
 7         return Request(
 8             request,
 9             parsers=self.get_parsers(), #添加解析器
10             authenticators=self.get_authenticators(),
11             negotiator=self.get_content_negotiator(),
12             parser_context=parser_context
13         )

内置的json解析器可以在视图类中添加：如parser_classes = [JSONParser,]

 1 class JSONParser(BaseParser):
 2     """
 3     Parses JSON-serialized data.
 4     """
 5     media_type = 'application/json'
 6     renderer_class = renderers.JSONRenderer
 7     strict = api_settings.STRICT_JSON
 8 
 9     def parse(self, stream, media_type=None, parser_context=None):
10         """
11         Parses the incoming bytestream as JSON and returns the resulting data.
12         """
13         parser_context = parser_context or {}
14         encoding = parser_context.get('encoding', settings.DEFAULT_CHARSET)
15 
16         try:
17             decoded_stream = codecs.getreader(encoding)(stream)
18             parse_constant = json.strict_constant if self.strict else None
19             return json.load(decoded_stream, parse_constant=parse_constant)
20         except ValueError as exc:
21             raise ParseError('JSON parse error - %s' % six.text_type(exc))