src/esi/ExpatParser.cc

   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 #include "squid.h"
  12
  13 #if USE_SQUID_ESI && HAVE_LIBEXPAT
  14
  15 #include "base/RunnersRegistry.h"
  16 #include "esi/ExpatParser.h"
  17
  18 #include <memory>
  19
  20 namespace Esi
  21 {
  22
  23 class ExpatRr : public RegisteredRunner
  24 {
  25 public:
  26     void finalizeConfig() override
  27     {
  28         registration.reset(new ESIParser::Register("expat", &ESIExpatParser::NewParser));
  29     }
  30
  31 private:
  32     std::unique_ptr<ESIParser::Register> registration;
  33 };
  34
  35 }
  36
  37 DefineRunnerRegistratorIn(Esi, ExpatRr);
  38
  39 EsiParserDefinition(ESIExpatParser);
  40
  41 ESIExpatParser::ESIExpatParser(ESIParserClient *aClient) : theClient (aClient)
  42 {
  43     /* TODO: grab the document encoding from the headers */
  44     p = XML_ParserCreateNS(nullptr,'|');
  45     XML_SetUserData (myParser(), static_cast<void *>(this));
  46     XML_SetElementHandler(myParser(), Start, End);
  47     XML_SetDefaultHandler(myParser(), Default);
  48     XML_SetCommentHandler(myParser(), Comment);
  49     XML_UseParserAsHandlerArg(myParser());
  50 }
  51
  52 ESIExpatParser::~ESIExpatParser()
  53 {
  54     XML_ParserFree (myParser());
  55     p = nullptr;
  56 }
  57
  58 void
  59 ESIExpatParser::Start(void *data,const XML_Char *el, const char **attr)
  60 {
  61     XML_Parser parser = static_cast<XML_Parser>(data);
  62     ESIExpatParser *me = (ESIExpatParser *)XML_GetUserData(parser);
  63     me->theClient->start (el, attr, XML_GetSpecifiedAttributeCount (parser));
  64 }
  65
  66 void
  67 ESIExpatParser::End(void *data,const XML_Char *el)
  68 {
  69     XML_Parser parser = static_cast<XML_Parser>(data);
  70     ESIExpatParser *me = (ESIExpatParser *)XML_GetUserData(parser);
  71     me->theClient->end (el);
  72 }
  73
  74 void
  75 ESIExpatParser::Default(void *data, const XML_Char *s, int len)
  76 {
  77     XML_Parser parser = static_cast<XML_Parser>(data);
  78     ESIExpatParser *me = (ESIExpatParser *)XML_GetUserData(parser);
  79     me->theClient->parserDefault (s, len);
  80 }
  81
  82 void
  83 ESIExpatParser::Comment(void *data, const XML_Char *s)
  84 {
  85     XML_Parser parser = static_cast<XML_Parser>(data);
  86     ESIExpatParser *me = (ESIExpatParser *)XML_GetUserData(parser);
  87     me->theClient->parserComment (s);
  88 }
  89
  90 bool
  91 ESIExpatParser::parse(char const *dataToParse, size_t const lengthOfData, bool const endOfStream)
  92 {
  93     return XML_Parse(myParser(), dataToParse, lengthOfData, endOfStream);
  94 }
  95
  96 long int
  97 ESIExpatParser::lineNumber() const
  98 {
  99     return (long int)XML_GetCurrentLineNumber(myParser());
 100 }
 101
 102 char const *
 103 ESIExpatParser::errorString() const
 104 {
 105     return XML_ErrorString(XML_GetErrorCode(myParser()));
 106 }
 107
 108 #endif /* USE_SQUID_ESI */
 109