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(* 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_error", "pfl"),
("stringToInt_error", "pi"),
("urlifyInt", "ts"),
("urlifyFloat", "ts"),
("urlifyString", "uf"),
("recv", "rv"),
("strcat", "cat"),
("intToString", "ts"),
("floatToString", "ts"),
("onError", "onError"),
("onFail", "onFail"),
("onConnectFail", "onConnectFail"),
("onDisconnect", "onDisconnect"),
("onServerError", "onServerError"),
("attrifyString", "escape"),
("attrifyInt", "ts"),
("attrifyFloat", "ts"),
("attrifyBool", "bs")]
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
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