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