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(* Copyright (c) 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 ScriptCheck :> SCRIPT_CHECK = struct
open Cjr
structure SS = BinarySetFn(struct
type ord_key = string
val compare = String.compare
end)
structure IS = IntBinarySet
val csBasis = SS.addList (SS.empty,
["new_client_source",
"get_client_source",
"set_client_source",
"new_channel",
"subscribe",
"send",
"recv"])
val scriptWords = ["<script",
" onclick=",
" onload="]
fun classify (ds, ps) =
let
fun inString {needle, haystack} =
let
val (_, suffix) = Substring.position needle (Substring.full haystack)
in
not (Substring.isEmpty suffix)
end
fun hasClient csids =
let
fun hasClient e =
case #1 e of
EPrim (Prim.String s) => List.exists (fn n => inString {needle = n, haystack = s}) scriptWords
| EPrim _ => false
| ERel _ => false
| ENamed n => IS.member (csids, n)
| ECon (_, _, NONE) => false
| ECon (_, _, SOME e) => hasClient e
| ENone _ => false
| ESome (_, e) => hasClient e
| EFfi ("Basis", x) => SS.member (csBasis, x)
| EFfi _ => false
| EFfiApp ("Basis", x, es) => SS.member (csBasis, x)
orelse List.exists hasClient es
| EFfiApp (_, _, es) => List.exists hasClient es
| EApp (e, es) => hasClient e orelse List.exists hasClient es
| EUnop (_, e) => hasClient e
| EBinop (_, e1, e2) => hasClient e1 orelse hasClient e2
| ERecord (_, xes) => List.exists (hasClient o #2) xes
| EField (e, _) => hasClient e
| ECase (e, pes, _) => hasClient e orelse List.exists (hasClient o #2) pes
| EError (e, _) => hasClient e
| EWrite e => hasClient e
| ESeq (e1, e2) => hasClient e1 orelse hasClient e2
| ELet (_, _, e1, e2) => hasClient e1 orelse hasClient e2
| EQuery {query, body, initial, ...} => hasClient query orelse hasClient body
orelse hasClient initial
| EDml {dml, ...} => hasClient dml
| ENextval {seq, ...} => hasClient seq
| EUnurlify (e, _) => hasClient e
in
hasClient
end
fun decl ((d, _), csids) =
let
val hasClient = hasClient csids
in
case d of
DVal (_, n, _, e) => if hasClient e then
IS.add (csids, n)
else
csids
| DFun (_, n, _, _, e) => if hasClient e then
IS.add (csids, n)
else
csids
| DFunRec xes => if List.exists (fn (_, _, _, _, e) => hasClient e) xes then
foldl (fn ((_, n, _, _, _), csids) => IS.add (csids, n))
csids xes
else
csids
| _ => csids
end
val csids = foldl decl IS.empty ds
val ps = map (fn (ek, x, n, ts, t, _) =>
(ek, x, n, ts, t,
if IS.member (csids, n) then
ServerAndClient
else
ServerOnly)) ps
in
(ds, ps)
end
end
|
