mirror of https://github.com/scrapy/scrapy.git
82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
"""
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This module implements the Response class which is used to represent HTTP
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responses in Scrapy.
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See documentation in docs/ref/request-response.rst
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"""
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import copy
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from scrapy.http.headers import Headers
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from scrapy.utils.trackref import object_ref
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class Response(object_ref):
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__slots__ = ['url', 'headers', 'status', '_body', 'request', '_meta', \
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'flags', '_cache', '__weakref__']
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def __init__(self, url, status=200, headers=None, body='', meta=None, flags=None):
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self.url = url
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self.headers = Headers(headers or {})
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self.status = int(status)
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self._set_body(body)
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self.request = None
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self.flags = [] if flags is None else list(flags)
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self._meta = dict(meta) if meta else None
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self._cache = None
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@property
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def meta(self):
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if self._meta is None:
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self._meta = {}
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return self._meta
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@property
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def cache(self):
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if self._cache is None:
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self._cache = {}
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return self._cache
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def _get_body(self):
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return self._body
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def _set_body(self, body):
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if isinstance(body, str):
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self._body = body
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elif isinstance(body, unicode):
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raise TypeError("Cannot assign a unicode body to a raw Response. Use TextResponse, HtmlResponse, etc")
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elif body is None:
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self._body = ''
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else:
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raise TypeError("Response body must either str or unicode. Got: '%s'" % type(body).__name__)
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body = property(_get_body, _set_body)
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def __repr__(self):
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return "%s(url=%s, headers=%s, status=%s, body=%s)" % \
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(type(self).__name__, repr(self.url), repr(self.headers), repr(self.status), repr(self.body))
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def __str__(self):
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flags = "(%s) " % ",".join(self.flags) if self.flags else ""
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status = "%d " % self.status + " " if self.status != 200 else ""
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return "%s<%s%s>" % (flags, status, self.url)
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def copy(self):
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"""Return a copy of this Response"""
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return self.replace()
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def replace(self, url=None, status=None, headers=None, body=None, meta=None, flags=None, cls=None, **kwargs):
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"""Create a new Response with the same attributes except for those
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given new values.
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"""
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if cls is None:
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cls = self.__class__
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new = cls(url=self.url if url is None else url,
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status=self.status if status is None else status,
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headers=copy.deepcopy(self.headers) if headers is None else headers,
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body=self.body if body is None else body,
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meta=self.meta if meta is None else meta,
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flags=self.flags if flags is None else flags,
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**kwargs)
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return new
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