1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
(* Copyright (c) 2008-2009, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
structure Settings :> SETTINGS = struct
val urlPrefix = ref "/"
val timeout = ref 0
val headers = ref ([] : string list)
val scripts = ref ([] : string list)
fun getUrlPrefix () = !urlPrefix
fun setUrlPrefix p =
urlPrefix := (if p = "" then
"/"
else if String.sub (p, size p - 1) <> #"/" then
p ^ "/"
else
p)
fun getTimeout () = !timeout
fun setTimeout n = timeout := n
fun getHeaders () = !headers
fun setHeaders ls = headers := ls
fun getScripts () = !scripts
fun setScripts ls = scripts := ls
type ffi = string * string
structure K = struct
type ord_key = ffi
fun compare ((m1, x1), (m2, x2)) =
Order.join (String.compare (m1, m2),
fn () => String.compare (x1, x2))
end
structure S = BinarySetFn(K)
structure M = BinaryMapFn(K)
fun basis x = S.addList (S.empty, map (fn x : string => ("Basis", x)) x)
val clientToServerBase = basis ["int",
"float",
"string",
"time",
"file",
"unit",
"option",
"list",
"bool"]
val clientToServer = ref clientToServerBase
fun setClientToServer ls = clientToServer := S.addList (clientToServerBase, ls)
fun mayClientToServer x = S.member (!clientToServer, x)
val effectfulBase = basis ["dml",
"nextval",
"set_cookie",
"new_client_source",
"get_client_source",
"set_client_source",
"alert",
"new_channel",
"send",
"onError",
"onFail",
"onConnectFail",
"onDisconnect",
"onServerError"]
val effectful = ref effectfulBase
fun setEffectful ls = effectful := S.addList (effectfulBase, ls)
fun isEffectful x = S.member (!effectful, x)
val clientBase = basis ["get",
"set",
"alert",
"recv",
"sleep",
"spawn",
"onError",
"onFail",
"onConnectFail",
"onDisconnect",
"onServerError"]
val client = ref clientBase
fun setClientOnly ls = client := S.addList (clientBase, ls)
fun isClientOnly x = S.member (!client, x)
val serverBase = basis ["requestHeader",
"query",
"dml",
"nextval",
"channel",
"send"]
val server = ref serverBase
fun setServerOnly ls = server := S.addList (serverBase, ls)
fun isServerOnly x = S.member (!server, x)
val basisM = foldl (fn ((k, v : string), m) => M.insert (m, ("Basis", k), v)) M.empty
val jsFuncsBase = basisM [("alert", "alert"),
("get_client_source", "sg"),
("htmlifyBool", "bs"),
("htmlifyFloat", "ts"),
("htmlifyInt", "ts"),
("htmlifyString", "eh"),
("new_client_source", "sc"),
("set_client_source", "sv"),
("stringToFloat", "pflo"),
("stringToInt", "pio"),
("stringToFloat_error", "pfl"),
("stringToInt_error", "pi"),
("urlifyInt", "ts"),
("urlifyFloat", "ts"),
("urlifyString", "uf"),
("recv", "rv"),
("strcat", "cat"),
("intToString", "ts"),
("floatToString", "ts"),
("charToString", "ts"),
("onError", "onError"),
("onFail", "onFail"),
("onConnectFail", "onConnectFail"),
("onDisconnect", "onDisconnect"),
("onServerError", "onServerError"),
("attrifyString", "escape"),
("attrifyInt", "ts"),
("attrifyFloat", "ts"),
("attrifyBool", "bs"),
("boolToString", "ts"),
("strsub", "sub"),
("strsuffix", "suf"),
("strlen", "slen"),
("strindex", "sidx"),
("strchr", "schr"),
("substring", "ssub"),
("strcspn", "sspn")]
val jsFuncs = ref jsFuncsBase
fun setJsFuncs ls = jsFuncs := foldl (fn ((k, v), m) => M.insert (m, k, v)) jsFuncsBase ls
fun jsFunc x = M.find (!jsFuncs, x)
datatype pattern_kind = Exact | Prefix
datatype action = Allow | Deny
type rule = { action : action, kind : pattern_kind, pattern : string }
datatype path_kind = Any | Url | Table | Sequence | View | Relation | Cookie | Style
type rewrite = { pkind : path_kind, kind : pattern_kind, from : string, to : string }
val rewrites = ref ([] : rewrite list)
fun subsume (pk1, pk2) =
pk1 = pk2
orelse pk2 = Any
orelse pk2 = Relation andalso (pk1 = Table orelse pk1 = Sequence orelse pk1 = View)
fun setRewriteRules ls = rewrites := ls
fun rewrite pk s =
let
fun rew (ls : rewrite list) =
case ls of
[] => s
| rewr :: ls =>
let
fun match () =
case #kind rewr of
Exact => if #from rewr = s then
SOME (size s)
else
NONE
| Prefix => if String.isPrefix (#from rewr) s then
SOME (size (#from rewr))
else
NONE
in
if subsume (pk, #pkind rewr) then
case match () of
NONE => rew ls
| SOME suffixStart => #to rewr ^ String.extract (s, suffixStart, NONE)
else
rew ls
end
in
rew (!rewrites)
end
val url = ref ([] : rule list)
val mime = ref ([] : rule list)
fun setUrlRules ls = url := ls
fun setMimeRules ls = mime := ls
fun getUrlRules () = !url
fun getMimeRules () = !mime
fun check f rules s =
let
fun chk (ls : rule list) =
case ls of
[] => false
| rule :: ls =>
let
val matches =
case #kind rule of
Exact => #pattern rule = s
| Prefix => String.isPrefix (#pattern rule) s
in
if matches then
case #action rule of
Allow => true
| Deny => false
else
chk ls
end
in
f s andalso chk (!rules)
end
val checkUrl = check (fn _ => true) url
val checkMime = check
(CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"/" orelse ch = #"-" orelse ch = #"."))
mime
end
|
