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1 (* Copyright (c) 2009, Adam Chlipala
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2 * All rights reserved.
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3 *
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4 * Redistribution and use in source and binary forms, with or without
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5 * modification, are permitted provided that the following conditions are met:
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6 *
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7 * - Redistributions of source code must retain the above copyright notice,
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8 * this list of conditions and the following disclaimer.
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9 * - Redistributions in binary form must reproduce the above copyright notice,
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10 * this list of conditions and the following disclaimer in the documentation
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11 * and/or other materials provided with the distribution.
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12 * - The names of contributors may not be used to endorse or promote products
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13 * derived from this software without specific prior written permission.
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14 *
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15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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25 * POSSIBILITY OF SUCH DAMAGE.
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26 *)
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27
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28 structure ScriptCheck :> SCRIPT_CHECK = struct
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29
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30 open Cjr
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31
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32 structure SS = BinarySetFn(struct
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33 type ord_key = string
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34 val compare = String.compare
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35 end)
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36 structure IS = IntBinarySet
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37
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38 val csBasis = SS.addList (SS.empty,
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39 ["new_client_source",
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40 "get_client_source",
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41 "set_client_source"])
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42
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43 val scriptWords = ["<script",
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44 " onclick="]
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45
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46 fun classify (ds, ps) =
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47 let
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48 fun inString {needle, haystack} =
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49 let
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50 val (_, suffix) = Substring.position needle (Substring.full haystack)
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51 in
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52 not (Substring.isEmpty suffix)
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53 end
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54
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55 fun hasClient csids =
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56 let
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57 fun hasClient e =
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58 case #1 e of
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59 EPrim (Prim.String s) => List.exists (fn n => inString {needle = n, haystack = s}) scriptWords
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60 | EPrim _ => false
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61 | ERel _ => false
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62 | ENamed n => IS.member (csids, n)
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63 | ECon (_, _, NONE) => false
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64 | ECon (_, _, SOME e) => hasClient e
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65 | ENone _ => false
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66 | ESome (_, e) => hasClient e
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67 | EFfi ("Basis", x) => SS.member (csBasis, x)
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68 | EFfi _ => false
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69 | EFfiApp ("Basis", x, es) => SS.member (csBasis, x)
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70 orelse List.exists hasClient es
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71 | EFfiApp (_, _, es) => List.exists hasClient es
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72 | EApp (e, es) => hasClient e orelse List.exists hasClient es
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73 | EUnop (_, e) => hasClient e
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74 | EBinop (_, e1, e2) => hasClient e1 orelse hasClient e2
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75 | ERecord (_, xes) => List.exists (hasClient o #2) xes
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76 | EField (e, _) => hasClient e
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77 | ECase (e, pes, _) => hasClient e orelse List.exists (hasClient o #2) pes
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78 | EError (e, _) => hasClient e
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79 | EWrite e => hasClient e
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80 | ESeq (e1, e2) => hasClient e1 orelse hasClient e2
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81 | ELet (_, _, e1, e2) => hasClient e1 orelse hasClient e2
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82 | EQuery {query, body, initial, ...} => hasClient query orelse hasClient body
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83 orelse hasClient initial
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84 | EDml {dml, ...} => hasClient dml
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85 | ENextval {seq, ...} => hasClient seq
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86 | EUnurlify (e, _) => hasClient e
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87 in
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88 hasClient
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89 end
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90
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91 fun decl ((d, _), csids) =
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92 let
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93 val hasClient = hasClient csids
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94 in
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95 case d of
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96 DVal (_, n, _, e) => if hasClient e then
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97 IS.add (csids, n)
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98 else
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99 csids
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100 | DFun (_, n, _, _, e) => if hasClient e then
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101 IS.add (csids, n)
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102 else
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103 csids
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104 | DFunRec xes => if List.exists (fn (_, _, _, _, e) => hasClient e) xes then
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105 foldl (fn ((_, n, _, _, _), csids) => IS.add (csids, n))
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106 csids xes
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107 else
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108 csids
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109 | _ => csids
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110 end
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111
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112 val csids = foldl decl IS.empty ds
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113
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114 val ps = map (fn (ek, x, n, ts, t, _) =>
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115 (ek, x, n, ts, t,
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116 if IS.member (csids, n) then
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117 ServerAndClient
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118 else
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119 ServerOnly)) ps
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120 in
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121 (ds, ps)
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122 end
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123
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124 end
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125
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