django1/django/http/__init__.py

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import os
from Cookie import SimpleCookie
from pprint import pformat
from urllib import urlencode, quote
from django.utils.datastructures import MultiValueDict
RESERVED_CHARS="!*'();:@&=+$,/?%#[]"
try:
# The mod_python version is more efficient, so try importing it first.
from mod_python.util import parse_qsl
except ImportError:
from cgi import parse_qsl
class Http404(Exception):
pass
class HttpRequest(object):
"A basic HTTP request"
def __init__(self):
self.GET, self.POST, self.COOKIES, self.META, self.FILES = {}, {}, {}, {}, {}
self.path = ''
self.method = None
def __repr__(self):
return '<HttpRequest\nGET:%s,\nPOST:%s,\nCOOKIES:%s,\nMETA:%s>' % \
(pformat(self.GET), pformat(self.POST), pformat(self.COOKIES),
pformat(self.META))
def __getitem__(self, key):
for d in (self.POST, self.GET):
if d.has_key(key):
return d[key]
raise KeyError, "%s not found in either POST or GET" % key
def has_key(self, key):
return self.GET.has_key(key) or self.POST.has_key(key)
def get_full_path(self):
return ''
def is_secure(self):
return os.environ.get("HTTPS") == "on"
def parse_file_upload(header_dict, post_data):
"Returns a tuple of (POST MultiValueDict, FILES MultiValueDict)"
import email, email.Message
from cgi import parse_header
raw_message = '\r\n'.join(['%s:%s' % pair for pair in header_dict.items()])
raw_message += '\r\n\r\n' + post_data
msg = email.message_from_string(raw_message)
POST = MultiValueDict()
FILES = MultiValueDict()
for submessage in msg.get_payload():
if submessage and isinstance(submessage, email.Message.Message):
name_dict = parse_header(submessage['Content-Disposition'])[1]
# name_dict is something like {'name': 'file', 'filename': 'test.txt'} for file uploads
# or {'name': 'blah'} for POST fields
# We assume all uploaded files have a 'filename' set.
if name_dict.has_key('filename'):
assert type([]) != type(submessage.get_payload()), "Nested MIME messages are not supported"
if not name_dict['filename'].strip():
continue
# IE submits the full path, so trim everything but the basename.
# (We can't use os.path.basename because it expects Linux paths.)
filename = name_dict['filename'][name_dict['filename'].rfind("\\")+1:]
FILES.appendlist(name_dict['name'], {
'filename': filename,
'content-type': (submessage.has_key('Content-Type') and submessage['Content-Type'] or None),
'content': submessage.get_payload(),
})
else:
POST.appendlist(name_dict['name'], submessage.get_payload())
return POST, FILES
class QueryDict(MultiValueDict):
"""A specialized MultiValueDict that takes a query string when initialized.
This is immutable unless you create a copy of it."""
def __init__(self, query_string, mutable=False):
MultiValueDict.__init__(self)
self._mutable = True
for key, value in parse_qsl((query_string or ''), True): # keep_blank_values=True
self.appendlist(key, value)
self._mutable = mutable
def _assert_mutable(self):
if not self._mutable:
raise AttributeError, "This QueryDict instance is immutable"
def __setitem__(self, key, value):
self._assert_mutable()
MultiValueDict.__setitem__(self, key, value)
def __copy__(self):
result = self.__class__('', mutable=True)
for key, value in dict.items(self):
dict.__setitem__(result, key, value)
return result
def __deepcopy__(self, memo={}):
import copy
result = self.__class__('', mutable=True)
memo[id(self)] = result
for key, value in dict.items(self):
dict.__setitem__(result, copy.deepcopy(key, memo), copy.deepcopy(value, memo))
return result
def setlist(self, key, list_):
self._assert_mutable()
MultiValueDict.setlist(self, key, list_)
def appendlist(self, key, value):
self._assert_mutable()
MultiValueDict.appendlist(self, key, value)
def update(self, other_dict):
self._assert_mutable()
MultiValueDict.update(self, other_dict)
def pop(self, key):
self._assert_mutable()
return MultiValueDict.pop(self, key)
def popitem(self):
self._assert_mutable()
return MultiValueDict.popitem(self)
def clear(self):
self._assert_mutable()
MultiValueDict.clear(self)
def setdefault(self, *args):
self._assert_mutable()
return MultiValueDict.setdefault(self, *args)
def copy(self):
"Returns a mutable copy of this object."
return self.__deepcopy__()
def urlencode(self):
output = []
for k, list_ in self.lists():
output.extend([urlencode({k: v}) for v in list_])
return '&'.join(output)
def parse_cookie(cookie):
if cookie == '':
return {}
c = SimpleCookie()
c.load(cookie)
cookiedict = {}
for key in c.keys():
cookiedict[key] = c.get(key).value
return cookiedict
class HttpResponse(object):
"A basic HTTP response, with content and dictionary-accessed headers"
status_code = 200
def __init__(self, content='', mimetype=None):
from django.conf import settings
self._charset = settings.DEFAULT_CHARSET
if not mimetype:
mimetype = "%s; charset=%s" % (settings.DEFAULT_CONTENT_TYPE, settings.DEFAULT_CHARSET)
if not isinstance(content, basestring) and hasattr(content, '__iter__'):
self._container = content
self._is_string = False
else:
self._container = [content]
self._is_string = True
self.headers = {'Content-Type': mimetype}
self.cookies = SimpleCookie()
def __str__(self):
"Full HTTP message, including headers"
return '\n'.join(['%s: %s' % (key, value)
for key, value in self.headers.items()]) \
+ '\n\n' + self.content
def __setitem__(self, header, value):
self.headers[header] = value
def __delitem__(self, header):
try:
del self.headers[header]
except KeyError:
pass
def __getitem__(self, header):
return self.headers[header]
def has_header(self, header):
"Case-insensitive check for a header"
header = header.lower()
for key in self.headers.keys():
if key.lower() == header:
return True
return False
def set_cookie(self, key, value='', max_age=None, expires=None, path='/', domain=None, secure=None):
self.cookies[key] = value
for var in ('max_age', 'path', 'domain', 'secure', 'expires'):
val = locals()[var]
if val is not None:
self.cookies[key][var.replace('_', '-')] = val
def delete_cookie(self, key, path='/', domain=None):
self.cookies[key] = ''
if path is not None:
self.cookies[key]['path'] = path
if domain is not None:
self.cookies[key]['domain'] = domain
self.cookies[key]['expires'] = 0
self.cookies[key]['max-age'] = 0
def _get_content(self):
content = ''.join(self._container)
if isinstance(content, unicode):
content = content.encode(self._charset)
return content
def _set_content(self, value):
self._container = [value]
self._is_string = True
content = property(_get_content, _set_content)
def __iter__(self):
self._iterator = self._container.__iter__()
return self
def next(self):
chunk = self._iterator.next()
if isinstance(chunk, unicode):
chunk = chunk.encode(self._charset)
return chunk
def close(self):
if hasattr(self._container, 'close'):
self._container.close()
# The remaining methods partially implement the file-like object interface.
# See http://docs.python.org/lib/bltin-file-objects.html
def write(self, content):
if not self._is_string:
raise Exception, "This %s instance is not writable" % self.__class__
self._container.append(content)
def flush(self):
pass
def tell(self):
if not self._is_string:
raise Exception, "This %s instance cannot tell its position" % self.__class__
return sum([len(chunk) for chunk in self._container])
class HttpResponseRedirect(HttpResponse):
status_code = 302
def __init__(self, redirect_to):
HttpResponse.__init__(self)
self['Location'] = quote(redirect_to, safe=RESERVED_CHARS)
class HttpResponsePermanentRedirect(HttpResponse):
status_code = 301
def __init__(self, redirect_to):
HttpResponse.__init__(self)
self['Location'] = quote(redirect_to, safe=RESERVED_CHARS)
class HttpResponseNotModified(HttpResponse):
status_code = 304
class HttpResponseBadRequest(HttpResponse):
status_code = 400
class HttpResponseNotFound(HttpResponse):
status_code = 404
class HttpResponseForbidden(HttpResponse):
status_code = 403
class HttpResponseNotAllowed(HttpResponse):
status_code = 405
def __init__(self, permitted_methods):
HttpResponse.__init__(self)
self['Allow'] = ', '.join(permitted_methods)
class HttpResponseGone(HttpResponse):
status_code = 410
def __init__(self, *args, **kwargs):
HttpResponse.__init__(self, *args, **kwargs)
class HttpResponseServerError(HttpResponse):
status_code = 500
def __init__(self, *args, **kwargs):
HttpResponse.__init__(self, *args, **kwargs)
def get_host(request):
"Gets the HTTP host from the environment or request headers."
host = request.META.get('HTTP_X_FORWARDED_HOST', '')
if not host:
host = request.META.get('HTTP_HOST', '')
return host