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 '' % \ (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 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" 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() self.status_code = 200 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): def __init__(self, redirect_to): HttpResponse.__init__(self) self['Location'] = quote(redirect_to, safe=RESERVED_CHARS) self.status_code = 302 class HttpResponsePermanentRedirect(HttpResponse): def __init__(self, redirect_to): HttpResponse.__init__(self) self['Location'] = quote(redirect_to, safe=RESERVED_CHARS) self.status_code = 301 class HttpResponseNotModified(HttpResponse): def __init__(self): HttpResponse.__init__(self) self.status_code = 304 class HttpResponseNotFound(HttpResponse): def __init__(self, *args, **kwargs): HttpResponse.__init__(self, *args, **kwargs) self.status_code = 404 class HttpResponseForbidden(HttpResponse): def __init__(self, *args, **kwargs): HttpResponse.__init__(self, *args, **kwargs) self.status_code = 403 class HttpResponseNotAllowed(HttpResponse): def __init__(self, permitted_methods): HttpResponse.__init__(self) self['Allow'] = ', '.join(permitted_methods) self.status_code = 405 class HttpResponseGone(HttpResponse): def __init__(self, *args, **kwargs): HttpResponse.__init__(self, *args, **kwargs) self.status_code = 410 class HttpResponseServerError(HttpResponse): def __init__(self, *args, **kwargs): HttpResponse.__init__(self, *args, **kwargs) self.status_code = 500 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