src/ESIAssign.h

   1 /*
   2  * $Id$
   3  *
   4  * DEBUG: section 86    ESI processing
   5  * AUTHOR: Robert Collins
   6  *
   7  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   8  * ----------------------------------------------------------
   9  *
  10  *  Squid is the result of efforts by numerous individuals from
  11  *  the Internet community; see the CONTRIBUTORS file for full
  12  *  details.   Many organizations have provided support for Squid's
  13  *  development; see the SPONSORS file for full details.  Squid is
  14  *  Copyrighted (C) 2001 by the Regents of the University of
  15  *  California; see the COPYRIGHT file for full details.  Squid
  16  *  incorporates software developed and/or copyrighted by other
  17  *  sources; see the CREDITS file for full details.
  18  *
  19  *  This program is free software; you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License as published by
  21  *  the Free Software Foundation; either version 2 of the License, or
  22  *  (at your option) any later version.
  23  *
  24  *  This program is distributed in the hope that it will be useful,
  25  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  *  GNU General Public License for more details.
  28  *
  29  *  You should have received a copy of the GNU General Public License
  30  *  along with this program; if not, write to the Free Software
  31  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  32  *
  33  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  34  */
  35
  36 #ifndef SQUID_ESIASSIGN_H
  37 #define SQUID_ESIASSIGN_H
  38
  39 #include "squid.h"
  40 #include "ESIElement.h"
  41 #include "SquidString.h"
  42 #include "ESIVarState.h"
  43
  44 /* ESIVariableExpression */
  45 /* This is a variable that is itself and expression */
  46
  47 class ESIVariableExpression : public ESIVarState::Variable
  48 {
  49
  50 public:
  51     ~ESIVariableExpression();
  52     ESIVariableExpression (String const &value);
  53     virtual void eval (ESIVarState &state, char const *, char const *) const;
  54
  55 private:
  56     String expression;
  57 };
  58
  59 /* ESIAssign */
  60
  61 class ESIContext;
  62
  63 class ESIAssign : public ESIElement
  64 {
  65
  66 public:
  67     MEMPROXY_CLASS(ESIAssign);
  68     ESIAssign (esiTreeParentPtr, int, const char **, ESIContext *);
  69     ESIAssign (ESIAssign const &);
  70     ESIAssign &operator=(ESIAssign const &);
  71     ~ESIAssign();
  72     esiProcessResult_t process (int dovars);
  73     void render(ESISegment::Pointer);
  74     bool addElement(ESIElement::Pointer);
  75     void provideData (ESISegment::Pointer data, ESIElement * source);
  76     Pointer makeCacheable() const;
  77     Pointer makeUsable(esiTreeParentPtr, ESIVarState &) const;
  78     void finish();
  79
  80 private:
  81     void evaluateVariable();
  82     esiTreeParentPtr parent;
  83     ESIVarState *varState;
  84     String name;
  85     ESIVariableExpression * value;
  86     ESIElement::Pointer variable;
  87     String unevaluatedVariable;
  88 };
  89
  90 MEMPROXY_CLASS_INLINE(ESIAssign)          /**DOCS_NOSEMI*/
  91
  92 #endif /* SQUID_ESIASSIGN_H */