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engine.cc
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/
engine.cc
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#include <nan.h>
#include <clamav.h>
using v8::Exception;
using v8::Function;
using v8::FunctionTemplate;
using v8::Handle;
using v8::Local;
using v8::Number;
using v8::Object;
using v8::String;
using v8::Value;
using Nan::AsyncQueueWorker;
using Nan::AsyncWorker;
using Nan::Callback;
using Nan::Error;
using Nan::HandleScope;
using Nan::MakeCallback;
using Nan::Null;
using Nan::ObjectWrap;
using Nan::Persistent;
using Nan::Undefined;
using Nan::Utf8String;
static Persistent<FunctionTemplate> constructor;
class ClamScanWorker : public AsyncWorker {
struct cl_engine *engine;
int ret;
const char *filename;
const char *virname;
unsigned long int size;
public:
ClamScanWorker(Callback *callback, struct cl_engine *engine, Local<String> name)
: AsyncWorker(callback), engine(engine), size(0) {
filename = strdup(*Utf8String(name));
}
~ClamScanWorker() {
delete filename;
}
void Execute() {
ret = cl_scanfile(filename, &virname, &size, engine, CL_SCAN_STDOPT);
}
void HandleOKCallback() {
HandleScope();
v8::Local<Value>argv[2];
switch (ret) {
case CL_CLEAN:
argv[0] = Null();
argv[1] = Null();
break;
case CL_VIRUS:
argv[0] = Null();
argv[1] = Nan::New<String>(virname).ToLocalChecked();
break;
default:
argv[0] = Error(cl_strerror(ret));
argv[1] = Null();
break;
}
callback->Call(2, argv, async_resource);
}
};
class ClamEngine : public ObjectWrap {
struct cl_engine *engine;
explicit ClamEngine() {
engine = cl_engine_new();
}
public:
static void Init() {
Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(ClamEngine::New);
constructor.Reset(tpl);
tpl->SetClassName(Nan::New<String>("ClamEngine").ToLocalChecked());
tpl->InstanceTemplate()->SetInternalFieldCount(1);
SetPrototypeMethod(tpl, "init", ClamEngine::InitAsync);
SetPrototypeMethod(tpl, "scanFile", ClamEngine::ScanFileAsync);
}
static void New(Nan::NAN_METHOD_ARGS_TYPE info) {
HandleScope();
ClamEngine* self = new ClamEngine();
self->Wrap(info.This());
info.This()->Set(Nan::New<String>("version").ToLocalChecked(), Nan::New<String>(cl_retver()).ToLocalChecked());
info.GetReturnValue().Set(info.This());
}
static void InitAsync(Nan::NAN_METHOD_ARGS_TYPE info) {
HandleScope();
ClamEngine* self = ObjectWrap::Unwrap<ClamEngine>(info.This());
Callback *callback = new Callback(info[0].As<Function>());
AsyncQueueWorker(new ClamInitWorker(callback, self->engine));
}
static void ScanFileAsync(Nan::NAN_METHOD_ARGS_TYPE info) {
HandleScope();
ClamEngine* self = ObjectWrap::Unwrap<ClamEngine>(info.This());
Local<String> filename = info[0].As<String>();
Callback *callback = new Callback(info[1].As<Function>());
AsyncQueueWorker(new ClamScanWorker(callback, self->engine, filename));
}
virtual ~ClamEngine() {
cl_engine_free(engine);
}
class ClamInitWorker : public AsyncWorker {
int ret;
struct cl_engine *engine;
unsigned int sigs;
public:
ClamInitWorker(Callback *callback, struct cl_engine *engine)
: AsyncWorker(callback), engine(engine), sigs(0) {}
~ClamInitWorker() {}
void Execute() {
ret = cl_load(cl_retdbdir(), engine, &sigs, CL_DB_STDOPT);
if (ret != CL_SUCCESS) {
return;
}
ret = cl_engine_compile(engine);
}
void HandleOKCallback() {
HandleScope();
Local<Value>argv[2];
if (ret != CL_SUCCESS) {
argv[0] = Error(cl_strerror(ret));
argv[1] = Null();
} else {
argv[0] = Null();
argv[1] = Nan::New<Number>(sigs);
}
callback->Call(2, argv, async_resource);
}
};
};
void Init(Handle<Object> exports, Handle<Object> module) {
assert(cl_init(CL_INIT_DEFAULT) == CL_SUCCESS);
ClamEngine::Init();
Local<FunctionTemplate> constructorHandle = New(constructor);
module->Set(Nan::New<String>("exports").ToLocalChecked(), constructorHandle->GetFunction());
}
NODE_MODULE(engine, Init)