221 lines
7.7 KiB
Python
221 lines
7.7 KiB
Python
from Cookie import SimpleCookie
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from pprint import pformat
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import datastructures
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DEFAULT_MIME_TYPE = 'text/html'
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class HttpRequest(object): # needs to be new-style class because subclasses define "property"s
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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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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 get_full_path(self):
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return ''
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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 = datastructures.MultiValueDict()
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FILES = datastructures.MultiValueDict()
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for submessage in msg.get_payload():
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if 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(datastructures.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):
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try:
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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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if not query_string:
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self.data = {}
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self._keys = []
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else:
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self.data = {}
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self._keys = []
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for name, value in parse_qsl(query_string, True): # keep_blank_values=True
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if name in self.data:
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self.data[name].append(value)
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else:
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self.data[name] = [value]
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if name not in self._keys:
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self._keys.append(name)
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self._mutable = False
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def __setitem__(self, key, value):
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if not self._mutable:
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raise AttributeError, "This QueryDict instance is immutable"
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else:
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self.data[key] = [value]
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if not key in self._keys:
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self._keys.append(key)
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def setlist(self, key, list_):
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if not self._mutable:
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raise AttributeError, "This QueryDict instance is immutable"
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else:
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self.data[key] = list_
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if not key in self._keys:
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self._keys.append(key)
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def copy(self):
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"Returns a mutable copy of this object"
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cp = datastructures.MultiValueDict.copy(self)
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cp._mutable = True
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return cp
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def assert_synchronized(self):
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assert(len(self._keys) == len(self.data.keys())), \
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"QueryDict data structure is out of sync: %s %s" % (str(self._keys), str(self.data))
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def items(self):
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"Respect order preserved by self._keys"
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self.assert_synchronized()
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items = []
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for key in self._keys:
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if key in self.data:
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items.append((key, self.data[key][0]))
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return items
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def keys(self):
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self.assert_synchronized()
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return self._keys
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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:
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"A basic HTTP response, with content and dictionary-accessed headers"
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def __init__(self, content='', mimetype=DEFAULT_MIME_TYPE):
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self.content = content
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self.headers = {'Content-Type':mimetype}
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self.cookies = SimpleCookie()
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self.status_code = 200
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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, 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'):
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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 get_content_as_string(self, encoding):
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"""
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Returns the content as a string, encoding it from a Unicode object if
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necessary.
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"""
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if isinstance(self.content, unicode):
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return self.content.encode(encoding)
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return self.content
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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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self.content += content
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def flush(self):
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pass
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def tell(self):
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return len(self.content)
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class HttpResponseRedirect(HttpResponse):
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def __init__(self, redirect_to):
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HttpResponse.__init__(self)
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self['Location'] = redirect_to
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self.status_code = 302
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class HttpResponseNotModified(HttpResponse):
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def __init__(self):
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HttpResponse.__init__(self)
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self.status_code = 304
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class HttpResponseNotFound(HttpResponse):
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def __init__(self, content='', mimetype=DEFAULT_MIME_TYPE):
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HttpResponse.__init__(self, content, mimetype)
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self.status_code = 404
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class HttpResponseForbidden(HttpResponse):
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def __init__(self, content='', mimetype=DEFAULT_MIME_TYPE):
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HttpResponse.__init__(self, content, mimetype)
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self.status_code = 403
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class HttpResponseGone(HttpResponse):
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def __init__(self, content='', mimetype=DEFAULT_MIME_TYPE):
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HttpResponse.__init__(self, content, mimetype)
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self.status_code = 410
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class HttpResponseServerError(HttpResponse):
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def __init__(self, content='', mimetype=DEFAULT_MIME_TYPE):
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HttpResponse.__init__(self, content, mimetype)
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self.status_code = 500
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