Allow funplex to handle requests to root.

[wrw.git] / wrw / util.py

diff --git a/wrw/util.py b/wrw/util.py
index 4306e9b..7209ae4 100644 (file)
--- a/wrw/util.py
+++ b/wrw/util.py
@@ -1,5 +1,5 @@
 import inspect, math
-import req, dispatch, session, form, resp, proto
+from . import req, dispatch, session, form, resp, proto
 
 def wsgiwrap(callable):
     def wrapper(env, startreq):
@@ -8,32 +8,41 @@ def wsgiwrap(callable):
     return wrapper
 
 def formparams(callable):
+    spec = inspect.getargspec(callable)
     def wrapper(req):
-        data = form.formdata(req)
-        spec = inspect.getargspec(callable)
+        try:
+            data = form.formdata(req)
+        except IOError:
+            raise resp.httperror(400, "Invalid request", "Form data was incomplete")
         args = dict(data.items())
         args["req"] = req
         if not spec.keywords:
             for arg in list(args):
                 if arg not in spec.args:
                     del args[arg]
-        for i in xrange(len(spec.args) - len(spec.defaults)):
+        for i in range(len(spec.args) - (len(spec.defaults) if spec.defaults else 0)):
             if spec.args[i] not in args:
                 raise resp.httperror(400, "Missing parameter", ("The query parameter `", resp.h.code(spec.args[i]), "' is required but not supplied."))
         return callable(**args)
     wrapper.__wrapped__ = callable
     return wrapper
 
-def funplex(*funs, **nfuns):
+class funplex(object):
+    def __init__(self, *funs, **nfuns):
+        self.dir = {}
+        self.dir.update(((self.unwrap(fun).__name__, fun) for fun in funs))
+        self.dir.update(nfuns)
+
+    @staticmethod
     def unwrap(fun):
         while hasattr(fun, "__wrapped__"):
             fun = fun.__wrapped__
         return fun
-    dir = {}
-    dir.update(((unwrap(fun).__name__, fun) for fun in funs))
-    dir.update(nfuns)
-    def handler(req):
+
+    def __call__(self, req):
         if req.pathinfo == "":
+            if "__root__" in self.dir:
+                return self.dir["__root__"](req)
             raise resp.redirect(req.uriname + "/")
         if req.pathinfo[:1] != "/":
             raise resp.notfound()
@@ -44,12 +53,23 @@ def funplex(*funs, **nfuns):
         else:
             p = p.partition("/")[0]
             bi = len(p) + 1
-        if p in dir:
-            return dir[p](req.shift(bi))
+        if p in self.dir:
+            sreq = req.shift(bi)
+            sreq.selfpath = req.pathinfo[1:]
+            return self.dir[p](sreq)
         raise resp.notfound()
-    return handler
 
-def persession(data = None):
+    def add(self, fun):
+        self.dir[self.unwrap(fun).__name__] = fun
+        return fun
+
+    def name(self, name):
+        def dec(fun):
+            self.dir[name] = fun
+            return fun
+        return dec
+
+def persession(data=None):
     def dec(callable):
         def wrapper(req):
             sess = session.get(req)
@@ -72,12 +92,12 @@ class preiter(object):
         self.bk = real
         self.bki = iter(real)
         self._next = None
-        self.next()
+        self.__next__()
 
     def __iter__(self):
         return self
 
-    def next(self):
+    def __next__(self):
         if self._next is self.end:
             raise StopIteration()
         ret = self._next
@@ -97,9 +117,19 @@ def pregen(callable):
     wrapper.__wrapped__ = callable
     return wrapper
 
+def stringwrap(charset):
+    def dec(callable):
+        @pregen
+        def wrapper(*args, **kwargs):
+            for string in callable(*args, **kwargs):
+                yield string.encode(charset)
+        wrapper.__wrapped__ = callable
+        return wrapper
+    return dec
+
 class sessiondata(object):
     @classmethod
-    def get(cls, req, create = True):
+    def get(cls, req, create=True):
         sess = cls.sessdb().get(req)
         with sess.lock:
             try:
@@ -118,7 +148,7 @@ class sessiondata(object):
 class autodirty(sessiondata):
     @classmethod
     def get(cls, req):
-        ret = super(autodirty, cls).get(req)
+        ret = super().get(req)
         if "_is_dirty" not in ret.__dict__:
             ret.__dict__["_is_dirty"] = False
         return ret
@@ -130,18 +160,18 @@ class autodirty(sessiondata):
         return self._is_dirty
 
     def __setattr__(self, name, value):
-        super(autodirty, self).__setattr__(name, value)
+        super().__setattr__(name, value)
         if "_is_dirty" in self.__dict__:
             self.__dict__["_is_dirty"] = True
 
     def __delattr__(self, name):
-        super(autodirty, self).__delattr__(name, value)
+        super().__delattr__(name, value)
         if "_is_dirty" in self.__dict__:
             self.__dict__["_is_dirty"] = True
 
 class manudirty(object):
     def __init__(self, *args, **kwargs):
-        super(manudirty, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.__dirty = False
 
     def sessfrozen(self):
@@ -184,7 +214,7 @@ class specslot(object):
 
 class specclass(type):
     def __init__(self, name, bases, tdict):
-        super(specclass, self).__init__(name, bases, tdict)
+        super().__init__(name, bases, tdict)
         sslots = set()
         dslots = set()
         for cls in self.__mro__:
@@ -196,8 +226,7 @@ class specclass(type):
         for i, slot in enumerate(self.__sslots_a__):
             setattr(self, slot, specslot(slot, i, slot in dslots))
 
-class specdirty(sessiondata):
-    __metaclass__ = specclass
+class specdirty(sessiondata, metaclass=specclass):
     __slots__ = ["session", "__sslots__", "_is_dirty"]
     
     def __specinit__(self):
@@ -205,7 +234,7 @@ class specdirty(sessiondata):
 
     @staticmethod
     def __new__(cls, req, sess):
-        self = super(specdirty, cls).__new__(cls)
+        self = super().__new__(cls)
         self.session = sess
         self.__sslots__ = [specslot.unbound] * len(cls.__sslots_a__)
         self.__specinit__()
@@ -245,6 +274,6 @@ class specdirty(sessiondata):
 def datecheck(req, mtime):
     if "If-Modified-Since" in req.ihead:
         rtime = proto.phttpdate(req.ihead["If-Modified-Since"])
-        if rtime >= math.floor(mtime):
+        if rtime is not None and rtime >= math.floor(mtime):
             raise resp.unmodified()
     req.ohead["Last-Modified"] = proto.httpdate(mtime)