src/esi/Context.cc

   1 /*
   2  * Copyright (C) 1996-2020 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 #include "squid.h"
  12
  13 /* MS Visual Studio Projects are monolithic, so we need the following
  14  * #if to exclude the ESI code from compile process when not needed.
  15  */
  16 #if (USE_SQUID_ESI == 1)
  17
  18 #include "client_side_request.h"
  19 #include "esi/Context.h"
  20 #include "http/Stream.h"
  21 #include "Store.h"
  22
  23 void
  24 ESIContext::updateCachedAST()
  25 {
  26     assert (http);
  27     assert (http->storeEntry());
  28
  29     if (hasCachedAST()) {
  30         debugs(86, 5, "ESIContext::updateCachedAST: not updating AST cache for entry " <<
  31                http->storeEntry() << " from ESI Context " << this <<
  32                " as there is already a cached AST.");
  33
  34         return;
  35     }
  36
  37     ESIElement::Pointer treeToCache = tree->makeCacheable();
  38     debugs(86, 5, "ESIContext::updateCachedAST: Updating AST cache for entry " <<
  39            http->storeEntry() << " with current value " <<
  40            http->storeEntry()->cachedESITree.getRaw() << " to new value " <<
  41            treeToCache.getRaw());
  42
  43     if (http->storeEntry()->cachedESITree.getRaw())
  44         http->storeEntry()->cachedESITree->finish();
  45
  46     http->storeEntry()->cachedESITree = treeToCache;
  47
  48     treeToCache = NULL;
  49 }
  50
  51 bool
  52 ESIContext::hasCachedAST() const
  53 {
  54     assert (http);
  55     assert (http->storeEntry());
  56
  57     if (http->storeEntry()->cachedESITree.getRaw()) {
  58         debugs(86, 5, "ESIContext::hasCachedAST: " << this <<
  59                " - Cached AST present in store entry " << http->storeEntry() << ".");
  60         return true;
  61     } else {
  62         debugs(86, 5, "ESIContext::hasCachedAST: " << this <<
  63                " - Cached AST not present in store entry " << http->storeEntry() << ".");
  64         return false;
  65     }
  66 }
  67
  68 void
  69 ESIContext::getCachedAST()
  70 {
  71     if (cachedASTInUse)
  72         return;
  73
  74     assert (hasCachedAST());
  75
  76     assert (varState);
  77
  78     parserState.popAll();
  79
  80     tree = http->storeEntry()->cachedESITree->makeUsable (this, *varState);
  81
  82     cachedASTInUse = true;
  83 }
  84
  85 void
  86 ESIContext::setErrorMessage(char const *anError)
  87 {
  88     if (!errormessage)
  89         errormessage = xstrdup(anError);
  90 }
  91
  92 #endif /* USE_SQUID_ESI == 1 */
  93