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 __init__(self, env):
  54         self.env = env
  55         self.uriname = env["SCRIPT_NAME"]
  56         self.filename = env.get("SCRIPT_FILENAME")
  57         self.uri = env["REQUEST_URI"]
  58         self.pathinfo = env["PATH_INFO"]
  59         self.query = env["QUERY_STRING"]
  60         self.remoteaddr = env["REMOTE_ADDR"]
  61         self.serverport = env["SERVER_PORT"]
  62         self.https = "HTTPS" in env
  63         self.ihead = headdict()
  64         self.ohead = headdict()
  65         for k, v in env.items():
  66             if k[:5] == "HTTP_":
  67                 self.ihead.add(fixcase(k[5:].replace("_", "-")), v)
  68         self.items = {}
  69         self.statuscode = (200, "OK")
  70         self.ohead["Content-Type"] = "text/html"
  71         self.resources = set()
  72         self.clean = set()
  73         self.commitfuns = []
  74
  75     def status(self, code, msg):
  76         self.statuscode = code, msg
  77
  78     def item(self, id):
  79         if id in self.items:
  80             return self.items[id]
  81         self.items[id] = new = id(self)
  82         if hasattr(new, "__enter__") and hasattr(new, "__exit__"):
  83             self.withres(new)
  84         return new
  85
  86     def withres(self, res):
  87         if res not in self.resources:
  88             done = False
  89             res.__enter__()
  90             try:
  91                 self.resources.add(res)
  92                 self.clean.add(res.__exit__)
  93                 done = True
  94             finally:
  95                 if not done:
  96                     res.__exit__(None, None, None)
  97                     self.resources.discard(res)
  98
  99     def cleanup(self):
 100         def clean1(list):
 101             if len(list) > 0:
 102                 try:
 103                     list[0]()
 104                 finally:
 105                     clean1(list[1:])
 106         clean1(list(self.clean))
 107
 108     def oncommit(self, fn):
 109         if fn not in self.commitfuns:
 110             self.commitfuns.append(fn)
 111
 112     def commit(self, startreq):
 113         for fun in reversed(self.commitfuns):
 114             fun(self)
 115         hdrs = []
 116         for nm in self.ohead:
 117             for val in self.ohead.getlist(nm):
 118                 hdrs.append((nm, val))
 119         startreq("%s %s" % self.statuscode, hdrs)