src/esi/Assign.h

   1 /*
   2  * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 86    ESI processing */
  10
  11 #ifndef SQUID_SRC_ESI_ASSIGN_H
  12 #define SQUID_SRC_ESI_ASSIGN_H
  13
  14 #include "esi/Element.h"
  15 #include "esi/VarState.h"
  16 #include "SquidString.h"
  17
  18 /** This is a variable that is itself an expression */
  19 class ESIVariableExpression : public ESIVarState::Variable
  20 {
  21 public:
  22     ~ESIVariableExpression() override;
  23     ESIVariableExpression (String const &value);
  24     void eval (ESIVarState &state, char const *, char const *) const override;
  25
  26 private:
  27     String expression;
  28 };
  29
  30 class ESIContext;
  31
  32 class ESIAssign : public ESIElement
  33 {
  34     MEMPROXY_CLASS(ESIAssign);
  35
  36 public:
  37     ESIAssign (esiTreeParentPtr, int, const char **, ESIContext *);
  38     ESIAssign (ESIAssign const &);
  39     ESIAssign &operator=(ESIAssign const &);
  40     ~ESIAssign() override;
  41     esiProcessResult_t process (int dovars) override;
  42     void render(ESISegment::Pointer) override;
  43     bool addElement(ESIElement::Pointer) override;
  44     void provideData (ESISegment::Pointer data, ESIElement * source) override;
  45     Pointer makeCacheable() const override;
  46     Pointer makeUsable(esiTreeParentPtr, ESIVarState &) const override;
  47     void finish() override;
  48
  49 private:
  50     void evaluateVariable();
  51     esiTreeParentPtr parent;
  52     ESIVarState *varState;
  53     String name;
  54     ESIVariableExpression * value;
  55     ESIElement::Pointer variable;
  56     String unevaluatedVariable;
  57 };
  58
  59 #endif /* SQUID_SRC_ESI_ASSIGN_H */
  60