wrw/req.py

   1 __all__ = ["request"]
   2
   3 class headdict(object):
   4     def __init__(self):
   5         self.dict = {}
   6
   7     def __getitem__(self, key):
   8         return self.dict[key.lower()][1]
   9
  10     def __setitem__(self, key, val):
  11         self.dict[key.lower()] = [key, val]
  12
  13     def __contains__(self, key):
  14         return key.lower() in self.dict
  15
  16     def __delitem__(self, key):
  17         del self.dict[key.lower()]
  18
  19     def __iter__(self):
  20         return iter((list[0] for list in self.dict.itervalues()))
  21
  22     def get(self, key, default = ""):
  23         if key.lower() in self.dict:
  24             return self.dict[key.lower()][1]
  25         return default
  26
  27     def getlist(self, key):
  28         return self.dict.setdefault(key.lower(), [key])[1:]
  29
  30     def add(self, key, val):
  31         self.dict.setdefault(key.lower(), [key]).append(val)
  32
  33     def __repr__(self):
  34         return repr(self.dict)
  35
  36     def __str__(self):
  37         return str(self.dict)
  38
  39 def fixcase(str):
  40     str = str.lower()
  41     i = 0
  42     b = True
  43     while i < len(str):
  44         if b:
  45             str = str[:i] + str[i].upper() + str[i + 1:]
  46         b = False
  47         if str[i] == '-':
  48             b = True
  49         i += 1
  50     return str
  51
  52 class request(object):
  53     def copy(self):
  54         return copyrequest(self)
  55
  56     def shift(self, n):
  57         new = self.copy()
  58         new.uriname = self.uriname + self.pathinfo[:n]
  59         new.pathinfo = self.pathinfo[n:]
  60         return new
  61
  62 class origrequest(request):
  63     def __init__(self, env):
  64         self.env = env
  65         self.method = env["REQUEST_METHOD"]
  66         self.uriname = env["SCRIPT_NAME"]
  67         self.filename = env.get("SCRIPT_FILENAME")
  68         self.uri = env["REQUEST_URI"]
  69         self.pathinfo = env["PATH_INFO"]
  70         self.query = env["QUERY_STRING"]
  71         self.remoteaddr = env["REMOTE_ADDR"]
  72         self.serverport = env["SERVER_PORT"]
  73         self.https = "HTTPS" in env
  74         self.ihead = headdict()
  75         self.ohead = headdict()
  76         for k, v in env.items():
  77             if k[:5] == "HTTP_":
  78                 self.ihead.add(fixcase(k[5:].replace("_", "-")), v)
  79         self.items = {}
  80         self.statuscode = (200, "OK")
  81         self.ohead["Content-Type"] = "text/html"
  82         self.resources = set()
  83         self.clean = set()
  84         self.commitfuns = []
  85
  86     def status(self, code, msg):
  87         self.statuscode = code, msg
  88
  89     def item(self, id):
  90         if id in self.items:
  91             return self.items[id]
  92         self.items[id] = new = id(self)
  93         if hasattr(new, "__enter__") and hasattr(new, "__exit__"):
  94             self.withres(new)
  95         return new
  96
  97     def withres(self, res):
  98         if res not in self.resources:
  99             done = False
 100             res.__enter__()
 101             try:
 102                 self.resources.add(res)
 103                 self.clean.add(res.__exit__)
 104                 done = True
 105             finally:
 106                 if not done:
 107                     res.__exit__(None, None, None)
 108                     self.resources.discard(res)
 109
 110     def cleanup(self):
 111         def clean1(list):
 112             if len(list) > 0:
 113                 try:
 114                     list[0]()
 115                 finally:
 116                     clean1(list[1:])
 117         clean1(list(self.clean))
 118
 119     def oncommit(self, fn):
 120         if fn not in self.commitfuns:
 121             self.commitfuns.append(fn)
 122
 123     def commit(self, startreq):
 124         for fun in reversed(self.commitfuns):
 125             fun(self)
 126         hdrs = []
 127         for nm in self.ohead:
 128             for val in self.ohead.getlist(nm):
 129                 hdrs.append((nm, val))
 130         startreq("%s %s" % self.statuscode, hdrs)
 131
 132     def topreq(self):
 133         return self
 134
 135 class copyrequest(request):
 136     def __init__(self, p):
 137         self.parent = p
 138         self.top = p.topreq()
 139         self.env = p.env
 140         self.uriname = p.uriname
 141         self.filename = p.filename
 142         self.uri = p.uri
 143         self.pathinfo = p.pathinfo
 144         self.query = p.query
 145         self.remoteaddr = p.remoteaddr
 146         self.serverport = p.serverport
 147         self.https = p.https
 148         self.ihead = p.ihead
 149         self.ohead = p.ohead
 150
 151     def status(self, code, msg):
 152         return self.parent.status(code, msg)
 153
 154     def item(self, id):
 155         return self.top.item(id)
 156
 157     def withres(self, res):
 158         return self.top.withres(res)
 159
 160     def oncommit(self, fn):
 161         return self.top.oncommit(fn)
 162
 163     def topreq(self):
 164         return self.parent.topreq()