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/* This file is part of Strigi Desktop Search
*
* Copyright (C) 2007 Jos van den Oever <jos@vandenoever.info>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "SHA1.h"
#include <strigi/streameventanalyzer.h>
#include <strigi/analyzerplugin.h>
#include <strigi/analysisresult.h>
#include <strigi/fieldtypes.h>
#include <list>
using namespace std;
using namespace Strigi;
class DigestEventAnalyzerFactory;
class DigestEventAnalyzer : public Strigi::StreamEventAnalyzer {
private:
CSHA1 sha1;
string hash;
Strigi::AnalysisResult* analysisresult;
const DigestEventAnalyzerFactory* const factory;
public:
DigestEventAnalyzer(const DigestEventAnalyzerFactory*);
~DigestEventAnalyzer();
const char* name() const { return "DigestEventAnalyzer"; }
void startAnalysis(Strigi::AnalysisResult*);
void endAnalysis(bool complete);
void handleData(const char* data, uint32_t length);
bool isReadyWithStream();
};
class DigestEventAnalyzerFactory
: public Strigi::StreamEventAnalyzerFactory {
public:
const Strigi::RegisteredField* shafield;
private:
const char* name() const {
return "DigestEventAnalyzer";
}
void registerFields(Strigi::FieldRegister&);
Strigi::StreamEventAnalyzer* newInstance() const {
return new DigestEventAnalyzer(this);
}
};
DigestEventAnalyzer::DigestEventAnalyzer(const DigestEventAnalyzerFactory* f)
:factory(f) {
analysisresult = 0;
hash.resize(40);
}
DigestEventAnalyzer::~DigestEventAnalyzer() {
}
void
DigestEventAnalyzer::startAnalysis(AnalysisResult* ar) {
analysisresult = ar;
sha1.Reset();
}
void
DigestEventAnalyzer::handleData(const char* data, uint32_t length) {
sha1.Update((unsigned char*)data, length);
}
namespace {
const string type("http://www.w3.org/1999/02/22-rdf-syntax-ns#type");
const string nfoFileHash(
"http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#FileHash");
const string nfohashAlgorithm(
"http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#hashAlgorithm");
const string SHA1("SHA1");
const string hashValue(
"http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#hashValue");
}
void
DigestEventAnalyzer::endAnalysis(bool complete) {
if (!complete) {
return;
}
unsigned char digest[20];
char d[41];
sha1.Final();
sha1.GetHash(digest);
for (int i = 0; i < 20; ++i) {
sprintf(d + 2 * i, "%02x", digest[i]);
}
hash.assign(d);
const string hashUri = analysisresult->newAnonymousUri();
analysisresult->addValue(factory->shafield, hashUri);
analysisresult->addTriplet(hashUri, type, nfoFileHash);
analysisresult->addTriplet(hashUri, nfohashAlgorithm, SHA1);
analysisresult->addTriplet(hashUri, hashValue, hash);
analysisresult = 0;
}
bool
DigestEventAnalyzer::isReadyWithStream() {
return false;
}
void
DigestEventAnalyzerFactory::registerFields(FieldRegister& reg) {
shafield = reg.registerField(
"http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#hasHash");
addField(shafield);
}
// Analyzer
//Factory
class Factory : public AnalyzerFactoryFactory {
public:
list<StreamEventAnalyzerFactory*>
streamEventAnalyzerFactories() const {
list<StreamEventAnalyzerFactory*> af;
af.push_back(new DigestEventAnalyzerFactory());
return af;
}
};
STRIGI_ANALYZER_FACTORY(Factory)
#include "SHA1.cpp"
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