| 1 | import inspect |
| 2 | import req, dispatch, session, form, resp |
| 3 | |
| 4 | def wsgiwrap(callable): |
| 5 | def wrapper(env, startreq): |
| 6 | return dispatch.handleenv(env, startreq, callable) |
| 7 | return wrapper |
| 8 | |
| 9 | def formparams(callable): |
| 10 | def wrapper(req): |
| 11 | data = form.formdata(req) |
| 12 | spec = inspect.getargspec(callable) |
| 13 | args = dict(data.items()) |
| 14 | args["req"] = req |
| 15 | if not spec.keywords: |
| 16 | for arg in list(args): |
| 17 | if arg not in spec.args: |
| 18 | del args[arg] |
| 19 | for i in xrange(len(spec.args) - len(spec.defaults)): |
| 20 | if spec.args[i] not in args: |
| 21 | raise resp.httperror(400, "Missing parameter", ("The query parameter `", resp.h.code(spec.args[i]), "' is required but not supplied.")) |
| 22 | return callable(**args) |
| 23 | return wrapper |
| 24 | |
| 25 | def persession(data = None): |
| 26 | def dec(callable): |
| 27 | def wrapper(req): |
| 28 | sess = session.get(req) |
| 29 | if callable not in sess: |
| 30 | if data is None: |
| 31 | sess[callable] = callable() |
| 32 | else: |
| 33 | if data not in sess: |
| 34 | sess[data] = data() |
| 35 | sess[callable] = callable(data) |
| 36 | return sess[callable].handle(req) |
| 37 | return wrapper |
| 38 | return dec |
| 39 | |
| 40 | class preiter(object): |
| 41 | __slots__ = ["bk", "bki", "_next"] |
| 42 | end = object() |
| 43 | def __init__(self, real): |
| 44 | self.bk = real |
| 45 | self.bki = iter(real) |
| 46 | self._next = None |
| 47 | self.next() |
| 48 | |
| 49 | def __iter__(self): |
| 50 | return self |
| 51 | |
| 52 | def next(self): |
| 53 | if self._next is self.end: |
| 54 | raise StopIteration() |
| 55 | ret = self._next |
| 56 | try: |
| 57 | self._next = next(self.bki) |
| 58 | except StopIteration: |
| 59 | self._next = self.end |
| 60 | return ret |
| 61 | |
| 62 | def close(self): |
| 63 | if hasattr(self.bk, "close"): |
| 64 | self.bk.close() |
| 65 | |
| 66 | def pregen(callable): |
| 67 | def wrapper(*args, **kwargs): |
| 68 | return preiter(callable(*args, **kwargs)) |
| 69 | return wrapper |
| 70 | |
| 71 | class sessiondata(object): |
| 72 | @classmethod |
| 73 | def get(cls, req, create = True): |
| 74 | sess = cls.sessdb().get(req) |
| 75 | with sess.lock: |
| 76 | try: |
| 77 | return sess[cls] |
| 78 | except KeyError: |
| 79 | if not create: |
| 80 | return None |
| 81 | ret = cls(req, sess) |
| 82 | sess[cls] = ret |
| 83 | return ret |
| 84 | |
| 85 | @classmethod |
| 86 | def sessdb(cls): |
| 87 | return session.default.val |
| 88 | |
| 89 | class autodirty(sessiondata): |
| 90 | @classmethod |
| 91 | def get(cls, req): |
| 92 | ret = super(autodirty, cls).get(req) |
| 93 | if "_is_dirty" not in ret.__dict__: |
| 94 | ret.__dict__["_is_dirty"] = False |
| 95 | return ret |
| 96 | |
| 97 | def sessfrozen(self): |
| 98 | self.__dict__["_is_dirty"] = False |
| 99 | |
| 100 | def sessdirty(self): |
| 101 | return self._is_dirty |
| 102 | |
| 103 | def __setattr__(self, name, value): |
| 104 | super(autodirty, self).__setattr__(name, value) |
| 105 | if "_is_dirty" in self.__dict__: |
| 106 | self.__dict__["_is_dirty"] = True |
| 107 | |
| 108 | def __delattr__(self, name): |
| 109 | super(autodirty, self).__delattr__(name, value) |
| 110 | if "_is_dirty" in self.__dict__: |
| 111 | self.__dict__["_is_dirty"] = True |
| 112 | |
| 113 | class manudirty(object): |
| 114 | def __init__(self, *args, **kwargs): |
| 115 | super(manudirty, self).__init__(*args, **kwargs) |
| 116 | self.__dirty = False |
| 117 | |
| 118 | def sessfrozen(self): |
| 119 | self.__dirty = False |
| 120 | |
| 121 | def sessdirty(self): |
| 122 | return self.__dirty |
| 123 | |
| 124 | def dirty(self): |
| 125 | self.__dirty = True |
| 126 | |
| 127 | class specslot(object): |
| 128 | __slots__ = ["nm", "idx", "dirty"] |
| 129 | unbound = object() |
| 130 | |
| 131 | def __init__(self, nm, idx, dirty): |
| 132 | self.nm = nm |
| 133 | self.idx = idx |
| 134 | self.dirty = dirty |
| 135 | |
| 136 | @staticmethod |
| 137 | def slist(ins): |
| 138 | # Avoid calling __getattribute__ |
| 139 | return specdirty.__sslots__.__get__(ins, type(ins)) |
| 140 | |
| 141 | def __get__(self, ins, cls): |
| 142 | val = self.slist(ins)[self.idx] |
| 143 | if val is specslot.unbound: |
| 144 | raise AttributeError("specslot %r is unbound" % self.nm) |
| 145 | return val |
| 146 | |
| 147 | def __set__(self, ins, val): |
| 148 | self.slist(ins)[self.idx] = val |
| 149 | if self.dirty: |
| 150 | ins.dirty() |
| 151 | |
| 152 | def __delete__(self, ins): |
| 153 | self.slist(ins)[self.idx] = specslot.unbound |
| 154 | ins.dirty() |
| 155 | |
| 156 | class specclass(type): |
| 157 | def __init__(self, name, bases, tdict): |
| 158 | super(specclass, self).__init__(name, bases, tdict) |
| 159 | sslots = set() |
| 160 | dslots = set() |
| 161 | for cls in self.__mro__: |
| 162 | css = cls.__dict__.get("__saveslots__", ()) |
| 163 | sslots.update(css) |
| 164 | dslots.update(cls.__dict__.get("__dirtyslots__", css)) |
| 165 | self.__sslots_l__ = list(sslots) |
| 166 | self.__sslots_a__ = list(sslots | dslots) |
| 167 | for i, slot in enumerate(self.__sslots_a__): |
| 168 | setattr(self, slot, specslot(slot, i, slot in dslots)) |
| 169 | |
| 170 | class specdirty(sessiondata): |
| 171 | __metaclass__ = specclass |
| 172 | __slots__ = ["session", "__sslots__", "_is_dirty"] |
| 173 | |
| 174 | def __specinit__(self): |
| 175 | pass |
| 176 | |
| 177 | @staticmethod |
| 178 | def __new__(cls, req, sess): |
| 179 | self = super(specdirty, cls).__new__(cls) |
| 180 | self.session = sess |
| 181 | self.__sslots__ = [specslot.unbound] * len(cls.__sslots_a__) |
| 182 | self.__specinit__() |
| 183 | self._is_dirty = False |
| 184 | return self |
| 185 | |
| 186 | def __getnewargs__(self): |
| 187 | return (None, self.session) |
| 188 | |
| 189 | def dirty(self): |
| 190 | self._is_dirty = True |
| 191 | |
| 192 | def sessfrozen(self): |
| 193 | self._is_dirty = False |
| 194 | |
| 195 | def sessdirty(self): |
| 196 | return self._is_dirty |
| 197 | |
| 198 | def __getstate__(self): |
| 199 | ret = {} |
| 200 | for nm, val in zip(type(self).__sslots_a__, specslot.slist(self)): |
| 201 | if val is specslot.unbound: |
| 202 | ret[nm] = False, None |
| 203 | else: |
| 204 | ret[nm] = True, val |
| 205 | return ret |
| 206 | |
| 207 | def __setstate__(self, st): |
| 208 | ss = specslot.slist(self) |
| 209 | for i, nm in enumerate(type(self).__sslots_a__): |
| 210 | bound, val = st.pop(nm, (False, None)) |
| 211 | if not bound: |
| 212 | ss[i] = specslot.unbound |
| 213 | else: |
| 214 | ss[i] = val |