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.uriname = env["SCRIPT_NAME"]
  66         self.filename = env.get("SCRIPT_FILENAME")
  67         self.uri = env["REQUEST_URI"]
  68         self.pathinfo = env["PATH_INFO"]
  69         self.query = env["QUERY_STRING"]
  70         self.remoteaddr = env["REMOTE_ADDR"]
  71         self.serverport = env["SERVER_PORT"]
  72         self.https = "HTTPS" in env
  73         self.ihead = headdict()
  74         self.ohead = headdict()
  75         for k, v in env.items():
  76             if k[:5] == "HTTP_":
  77                 self.ihead.add(fixcase(k[5:].replace("_", "-")), v)
  78         self.items = {}
  79         self.statuscode = (200, "OK")
  80         self.ohead["Content-Type"] = "text/html"
  81         self.resources = set()
  82         self.clean = set()
  83         self.commitfuns = []
  84
  85     def status(self, code, msg):
  86         self.statuscode = code, msg
  87
  88     def item(self, id):
  89         if id in self.items:
  90             return self.items[id]
  91         self.items[id] = new = id(self)
  92         if hasattr(new, "__enter__") and hasattr(new, "__exit__"):
  93             self.withres(new)
  94         return new
  95
  96     def withres(self, res):
  97         if res not in self.resources:
  98             done = False
  99             res.__enter__()
 100             try:
 101                 self.resources.add(res)
 102                 self.clean.add(res.__exit__)
 103                 done = True
 104             finally:
 105                 if not done:
 106                     res.__exit__(None, None, None)
 107                     self.resources.discard(res)
 108
 109     def cleanup(self):
 110         def clean1(list):
 111             if len(list) > 0:
 112                 try:
 113                     list[0]()
 114                 finally:
 115                     clean1(list[1:])
 116         clean1(list(self.clean))
 117
 118     def oncommit(self, fn):
 119         if fn not in self.commitfuns:
 120             self.commitfuns.append(fn)
 121
 122     def commit(self, startreq):
 123         for fun in reversed(self.commitfuns):
 124             fun(self)
 125         hdrs = []
 126         for nm in self.ohead:
 127             for val in self.ohead.getlist(nm):
 128                 hdrs.append((nm, val))
 129         startreq("%s %s" % self.statuscode, hdrs)
 130
 131     def topreq(self):
 132         return self
 133
 134 class copyrequest(request):
 135     def __init__(self, p):
 136         self.parent = p
 137         self.top = p.topreq()
 138         self.env = p.env
 139         self.uriname = p.uriname
 140         self.filename = p.filename
 141         self.uri = p.uri
 142         self.pathinfo = p.pathinfo
 143         self.query = p.query
 144         self.remoteaddr = p.remoteaddr
 145         self.serverport = p.serverport
 146         self.https = p.https
 147         self.ihead = p.ihead
 148         self.ohead = p.ohead
 149
 150     def status(self, code, msg):
 151         return self.parent.status(code, msg)
 152
 153     def item(self, id):
 154         return self.top.item(id)
 155
 156     def withres(self, res):
 157         return self.top.withres(res)
 158
 159     def oncommit(self, fn):
 160         return self.top.oncommit(fn)
 161
 162     def topreq(self):
 163         return self.parent.topreq()