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# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
class RequestHeaders(object):
'''A custom dictionary impementation for headers which ignores the case
of requests, since different HTTP libraries seem to mangle them.
'''
def __init__(self, dict_):
if isinstance(dict_, RequestHeaders):
self._dict = dict_
else:
self._dict = dict((k.lower(), v) for k, v in dict_.iteritems())
def get(self, key, default=None):
return self._dict.get(key.lower(), default)
def __repr__(self):
return repr(self._dict)
def __str__(self):
return repr(self._dict)
class Request(object):
'''Request data.
'''
def __init__(self, path, host, headers, arguments={}):
self.path = path.lstrip('/')
assert not '/' in host, 'Host "%s" should not contain a slash' % host
self.host = host
self.headers = RequestHeaders(headers)
self.arguments = arguments
@staticmethod
def ForTest(path, host=None, headers=None, arguments=None):
return Request(path,
host or 'developer.chrome.com',
headers or {},
arguments or {})
def __repr__(self):
return 'Request(path=%s, host=%s, headers=%s)' % (
self.path, self.host, self.headers)
def __str__(self):
return repr(self)
class _ContentBuilder(object):
'''Builds the response content.
'''
def __init__(self):
self._buf = []
def Append(self, content):
if isinstance(content, unicode):
content = content.encode('utf-8', 'replace')
self._buf.append(content)
def ToString(self):
self._Collapse()
return self._buf[0]
def __str__(self):
return self.ToString()
def __len__(self):
return len(self.ToString())
def _Collapse(self):
self._buf = [''.join(self._buf)]
class Response(object):
'''The response from Get().
'''
def __init__(self, content=None, headers=None, status=None):
self.content = _ContentBuilder()
if content is not None:
self.content.Append(content)
self.headers = {}
if headers is not None:
self.headers.update(headers)
self.status = status
@staticmethod
def Ok(content, headers=None):
'''Returns an OK (200) response.
'''
return Response(content=content, headers=headers, status=200)
@staticmethod
def Redirect(url, permanent=False):
'''Returns a redirect (301 or 302) response.
'''
status = 301 if permanent else 302
return Response(headers={'Location': url}, status=status)
@staticmethod
def BadRequest(content, headers=None):
'''Returns a bad request (400) response.
'''
return Response(content=content, headers=headers, status=400)
@staticmethod
def Unauthorized(content, method, realm, headers={}):
'''Returns an unauthorized (401) response.
'''
new_headers = headers.copy()
new_headers.update({
'WWW-Authentication': '%s realm="%s"' % (method, realm)})
return Response(content=content, headers=headers, status=401)
@staticmethod
def Forbidden(content, headers=None):
'''Returns an forbidden (403) response.
'''
return Response(content=content, headers=headers, status=403)
@staticmethod
def NotFound(content, headers=None):
'''Returns a not found (404) response.
'''
return Response(content=content, headers=headers, status=404)
@staticmethod
def NotModified(content, headers=None):
return Response(content=content, headers=headers, status=304)
@staticmethod
def InternalError(content, headers=None):
'''Returns an internal error (500) response.
'''
return Response(content=content, headers=headers, status=500)
@staticmethod
def ThrottledError(content, headers=None):
'''Returns an HTTP throttle error (429) response.
'''
return Response(content=content, headers=headers, status=429)
def Append(self, content):
'''Appends |content| to the response content.
'''
self.content.append(content)
def AddHeader(self, key, value):
'''Adds a header to the response.
'''
self.headers[key] = value
def AddHeaders(self, headers):
'''Adds several headers to the response.
'''
self.headers.update(headers)
def SetStatus(self, status):
self.status = status
def GetRedirect(self):
if self.headers.get('Location') is None:
return (None, None)
return (self.headers.get('Location'), self.status == 301)
def IsNotFound(self):
return self.status == 404
def __eq__(self, other):
return (isinstance(other, self.__class__) and
str(other.content) == str(self.content) and
other.headers == self.headers and
other.status == self.status)
def __ne__(self, other):
return not (self == other)
def __repr__(self):
return 'Response(content=%s bytes, status=%s, headers=%s)' % (
len(self.content), self.status, self.headers)
def __str__(self):
return repr(self)
class Servlet(object):
def __init__(self, request):
self._request = request
def Get(self):
'''Returns a Response.
'''
raise NotImplemented()
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