rest-framework解析器

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解析器1.json解析器

發一個json格式的post請求。
後台列印：request_data---> {‘title‘: ‘北京摺疊‘}request.POST---> <QueryDict: {}>

2.urlencode解析器

request_data---> <QueryDict: {‘title‘: [‘北京‘], ‘price‘: [‘122‘]}>request.POST---> <QueryDict: {‘title‘: [‘北京‘], ‘price‘: [‘122‘]}>

rest-framework預設支援的有3種解析器，json，form,檔案上傳。而Django原生只支援form的解析，不支援json的解析。

源碼：

JSON解析器類：

class JSONParser(BaseParser):    """    Parses JSON-serialized data.    """    media_type = ‘application/json‘    renderer_class = renderers.JSONRenderer    strict = api_settings.STRICT_JSON    def parse(self, stream, media_type=None, parser_context=None):        """        Parses the incoming bytestream as JSON and returns the resulting data.        """        parser_context = parser_context or {}        encoding = parser_context.get(‘encoding‘, settings.DEFAULT_CHARSET)        try:            decoded_stream = codecs.getreader(encoding)(stream)            parse_constant = json.strict_constant if self.strict else None            return json.load(decoded_stream, parse_constant=parse_constant)        except ValueError as exc:            raise ParseError(‘JSON parse error - %s‘ % six.text_type(exc))

form解析器類：

class FormParser(BaseParser):    """    Parser for form data.    """    media_type = ‘application/x-www-form-urlencoded‘    def parse(self, stream, media_type=None, parser_context=None):        """        Parses the incoming bytestream as a URL encoded form,        and returns the resulting QueryDict.        """        parser_context = parser_context or {}        encoding = parser_context.get(‘encoding‘, settings.DEFAULT_CHARSET)        data = QueryDict(stream.read(), encoding=encoding)        return data        

檔案上傳類：

class MultiPartParser(BaseParser):    """    Parser for multipart form data, which may include file data.    """    media_type = ‘multipart/form-data‘    def parse(self, stream, media_type=None, parser_context=None):        """        Parses the incoming bytestream as a multipart encoded form,        and returns a DataAndFiles object.        `.data` will be a `QueryDict` containing all the form parameters.        `.files` will be a `QueryDict` containing all the form files.        """        parser_context = parser_context or {}        request = parser_context[‘request‘]        encoding = parser_context.get(‘encoding‘, settings.DEFAULT_CHARSET)        meta = request.META.copy()        meta[‘CONTENT_TYPE‘] = media_type        upload_handlers = request.upload_handlers        try:            parser = DjangoMultiPartParser(meta, stream, upload_handlers, encoding)            data, files = parser.parse()            return DataAndFiles(data, files)        except MultiPartParserError as exc:            raise ParseError(‘Multipart form parse error - %s‘ % six.text_type(exc))

 URL控制

1.因為每次url都需要寫下面的2條線，導致代碼冗餘。

 # url(r‘authors/$‘, views.AuthorModelView.as_view({"get":"list","post":"create"}),name="authors"), # url(r‘authors/(?P<pk>\d+)/$‘, views.AuthorModelView.as_view({"get":"retrieve","put":"update","delete":"destroy"}),name="authordetail"),

2.使用rest-framework提供的：

from django.conf.urls import url,includefrom app01 import viewsfrom rest_framework import routersrouters=routers.DefaultRouter()routers.register("authors",views.AuthorModelView)

url中需要加這一句即可：

url(r‘‘,include(routers.urls)),

以後每一個表，註冊一下即可，前面的是url的首碼，後面是對應的視圖類。

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rest-framework解析器