Ejemplo n.º 1
0
static int V8ToVPack(BuilderContext& context,
                     v8::Handle<v8::Value> const parameter,
                     std::string const& attributeName, bool inObject) {
  
  if (parameter->IsNull() || parameter->IsUndefined()) {
    AddValue(context, attributeName, inObject,
             VPackValue(VPackValueType::Null));
    return TRI_ERROR_NO_ERROR;
  }

  if (parameter->IsBoolean()) {
    AddValue(context, attributeName, inObject,
             VPackValue(parameter->ToBoolean()->Value()));
    return TRI_ERROR_NO_ERROR;
  }
  
  if (parameter->IsNumber()) {
    if (parameter->IsInt32()) {
      AddValue(context, attributeName, inObject,
               VPackValue(parameter->ToInt32()->Value()));
      return TRI_ERROR_NO_ERROR;
    }
  
    if (parameter->IsUint32()) {
      AddValue(context, attributeName, inObject,
               VPackValue(parameter->ToUint32()->Value()));
      return TRI_ERROR_NO_ERROR;
    }

    AddValue(context, attributeName, inObject,
             VPackValue(parameter->ToNumber()->Value()));
    return TRI_ERROR_NO_ERROR;
  }

  if (parameter->IsString()) {
    v8::String::Utf8Value str(parameter->ToString());

    if (*str == nullptr) {
      return TRI_ERROR_OUT_OF_MEMORY;
    }

    AddValuePair(context, attributeName, inObject, VPackValuePair(*str, str.length(), VPackValueType::String));
    return TRI_ERROR_NO_ERROR;
  }

  if (parameter->IsArray()) {
    v8::Handle<v8::Array> array = v8::Handle<v8::Array>::Cast(parameter);

    AddValue(context, attributeName, inObject,
             VPackValue(VPackValueType::Array));
    uint32_t const n = array->Length();

    for (uint32_t i = 0; i < n; ++i) {
      v8::Handle<v8::Value> value = array->Get(i);
      if (value->IsUndefined()) {
        // ignore array values which are undefined
        continue;
      }

      if (++context.level > MaxLevels) {
        // too much recursion
        return TRI_ERROR_BAD_PARAMETER;
      }

      int res = V8ToVPack<performAllChecks>(context, value, NoAttribute, false);
      
      --context.level;

      if (res != TRI_ERROR_NO_ERROR) {
        return res;
      }
    }

    if (!context.keepTopLevelOpen || context.level > 0) {
      context.builder.close();
    }
    return TRI_ERROR_NO_ERROR;
  }

  if (parameter->IsObject()) {
    if (performAllChecks) {
      if (parameter->IsBooleanObject()) {
        AddValue(context, attributeName, inObject,
                VPackValue(v8::Handle<v8::BooleanObject>::Cast(parameter)
                                ->BooleanValue()));
        return TRI_ERROR_NO_ERROR;
      }

      if (parameter->IsNumberObject()) {
        AddValue(context, attributeName, inObject,
                VPackValue(v8::Handle<v8::NumberObject>::Cast(parameter)
                                ->NumberValue()));
        return TRI_ERROR_NO_ERROR;
      }

      if (parameter->IsStringObject()) {
        v8::String::Utf8Value str(parameter->ToString());

        if (*str == nullptr) {
          return TRI_ERROR_OUT_OF_MEMORY;
        }

        AddValuePair(context, attributeName, inObject, VPackValuePair(*str, str.length(), VPackValueType::String));
        return TRI_ERROR_NO_ERROR;
      }

      if (parameter->IsRegExp() || parameter->IsFunction() ||
          parameter->IsExternal()) {
        return TRI_ERROR_BAD_PARAMETER;
      }
    }

    v8::Handle<v8::Object> o = parameter->ToObject();

    if (performAllChecks) {
      // first check if the object has a "toJSON" function
      if (o->Has(context.toJsonKey)) {
        // call it if yes
        v8::Handle<v8::Value> func = o->Get(context.toJsonKey);
        if (func->IsFunction()) {
          v8::Handle<v8::Function> toJson = v8::Handle<v8::Function>::Cast(func);

          v8::Handle<v8::Value> args;
          v8::Handle<v8::Value> converted = toJson->Call(o, 0, &args);

          if (!converted.IsEmpty()) {
            // return whatever toJSON returned
            v8::String::Utf8Value str(converted->ToString());

            if (*str == nullptr) {
              return TRI_ERROR_OUT_OF_MEMORY;
            }

            // this passes ownership for the utf8 string to the JSON object
            AddValuePair(context, attributeName, inObject, VPackValuePair(*str, str.length(), VPackValueType::String));
            return TRI_ERROR_NO_ERROR;
          }
        }

        // fall-through intentional
      }
    }

    v8::Handle<v8::Array> names = o->GetOwnPropertyNames();
    uint32_t const n = names->Length();

    AddValue(context, attributeName, inObject,
             VPackValue(VPackValueType::Object));

    for (uint32_t i = 0; i < n; ++i) {
      // process attribute name
      v8::Handle<v8::Value> key = names->Get(i);
      v8::String::Utf8Value str(key);

      if (*str == nullptr) {
        return TRI_ERROR_OUT_OF_MEMORY;
      }

      v8::Handle<v8::Value> value = o->Get(key);
      if (value->IsUndefined()) {
        // ignore object values which are undefined
        continue;
      }

      if (++context.level > MaxLevels) {
        // too much recursion
        return TRI_ERROR_BAD_PARAMETER;
      }

      int res = V8ToVPack<performAllChecks>(context, value, *str, true);
      
      --context.level;

      if (res != TRI_ERROR_NO_ERROR) {
        return res;
      }
    }

    if (!context.keepTopLevelOpen || context.level > 0) {
      context.builder.close();
    }
    return TRI_ERROR_NO_ERROR;
  }

  return TRI_ERROR_BAD_PARAMETER;
}
Ejemplo n.º 2
0
void QV8Worker::serialize(QByteArray &data, v8::Handle<v8::Value> v, QV8Engine *engine)
{
    if (v.IsEmpty()) {
    } else if (v->IsUndefined()) {
        push(data, valueheader(WorkerUndefined));
    } else if (v->IsNull()) {
        push(data, valueheader(WorkerNull));
    } else if (v->IsTrue()) {
        push(data, valueheader(WorkerTrue));
    } else if (v->IsFalse()) {
        push(data, valueheader(WorkerFalse));
    } else if (v->IsString()) {
        v8::Handle<v8::String> string = v->ToString();
        int length = string->Length() + 1;
        if (length > 0xFFFFFF) {
            push(data, valueheader(WorkerUndefined));
            return;
        }
        int utf16size = ALIGN(length * sizeof(uint16_t));

        reserve(data, utf16size + sizeof(quint32));
        push(data, valueheader(WorkerString, length));
        
        int offset = data.size();
        data.resize(data.size() + utf16size);
        char *buffer = data.data() + offset;

        string->Write((uint16_t*)buffer);
    } else if (v->IsFunction()) {
        // XXX TODO: Implement passing function objects between the main and
        // worker scripts
        push(data, valueheader(WorkerUndefined));
    } else if (v->IsArray()) {
        v8::Handle<v8::Array> array = v8::Handle<v8::Array>::Cast(v);
        uint32_t length = array->Length();
        if (length > 0xFFFFFF) {
            push(data, valueheader(WorkerUndefined));
            return;
        }
        reserve(data, sizeof(quint32) + length * sizeof(quint32));
        push(data, valueheader(WorkerArray, length));
        for (uint32_t ii = 0; ii < length; ++ii)
            serialize(data, array->Get(ii), engine);
    } else if (v->IsInt32()) {
        reserve(data, 2 * sizeof(quint32));
        push(data, valueheader(WorkerInt32));
        push(data, (quint32)v->Int32Value());
    } else if (v->IsUint32()) {
        reserve(data, 2 * sizeof(quint32));
        push(data, valueheader(WorkerUint32));
        push(data, v->Uint32Value());
    } else if (v->IsNumber()) {
        reserve(data, sizeof(quint32) + sizeof(double));
        push(data, valueheader(WorkerNumber));
        push(data, v->NumberValue());
    } else if (v->IsDate()) {
        reserve(data, sizeof(quint32) + sizeof(double));
        push(data, valueheader(WorkerDate));
        push(data, v8::Handle<v8::Date>::Cast(v)->NumberValue());
    } else if (v->IsRegExp()) {
        v8::Handle<v8::RegExp> regexp = v8::Handle<v8::RegExp>::Cast(v);
        quint32 flags = regexp->GetFlags();
        v8::Local<v8::String> source = regexp->GetSource();

        int length = source->Length() + 1;
        if (length > 0xFFFFFF) {
            push(data, valueheader(WorkerUndefined));
            return;
        }
        int utf16size = ALIGN(length * sizeof(uint16_t));

        reserve(data, sizeof(quint32) + utf16size);
        push(data, valueheader(WorkerRegexp, flags));
        push(data, (quint32)length);
        int offset = data.size();
        data.resize(data.size() + utf16size);
        char *buffer = data.data() + offset;

        source->Write((uint16_t*)buffer);
    } else if (v->IsObject() && !v->ToObject()->GetExternalResource()) {
        v8::Handle<v8::Object> object = v->ToObject();
        v8::Local<v8::Array> properties = engine->getOwnPropertyNames(object);
        quint32 length = properties->Length();
        if (length > 0xFFFFFF) {
            push(data, valueheader(WorkerUndefined));
            return;
        }
        push(data, valueheader(WorkerObject, length));
        v8::TryCatch tc;
        for (quint32 ii = 0; ii < length; ++ii) {
            v8::Local<v8::String> str = properties->Get(ii)->ToString();
            serialize(data, str, engine);

            v8::Local<v8::Value> val = object->Get(str);
            if (tc.HasCaught()) {
                serialize(data, v8::Undefined(), engine);
                tc.Reset();
            } else {
                serialize(data, val, engine);
            }
        }
    } else if (engine->isQObject(v)) {
        // XXX TODO: Generalize passing objects between the main thread and worker scripts so 
        // that others can trivially plug in their elements.
        QDeclarativeListModel *lm = qobject_cast<QDeclarativeListModel *>(engine->toQObject(v));
        if (lm && lm->agent()) {
            QDeclarativeListModelWorkerAgent *agent = lm->agent();
            agent->addref();
            push(data, valueheader(WorkerListModel));
            push(data, (void *)agent);
            return;
        } 
        // No other QObject's are allowed to be sent
        push(data, valueheader(WorkerUndefined));
    } else {
        push(data, valueheader(WorkerUndefined));
    }
}
Ejemplo n.º 3
0
static int FillShapeValueJson (v8::Isolate* isolate,
                               VocShaper* shaper,
                               TRI_shape_value_t* dst,
                               v8::Handle<v8::Value> const json,
                               size_t level,
                               set<int>& seenHashes,
                               vector<v8::Handle<v8::Object>>& seenObjects,
                               bool create) {
  v8::HandleScope scope(isolate);

  if (json->IsRegExp() || json->IsFunction() || json->IsExternal()) {
    LOG_TRACE("shaper failed because regexp/function/external/date object cannot be converted");
    return TRI_ERROR_BAD_PARAMETER;
  }
  
  if (json->IsNull() || json->IsUndefined()) {
    return FillShapeValueNull(shaper, dst);
  }

  if (json->IsBoolean()) {
    return FillShapeValueBoolean(shaper, dst, json->ToBoolean());
  }

  if (json->IsBooleanObject()) {
    return FillShapeValueBoolean(shaper, dst, v8::Handle<v8::BooleanObject>::Cast(json));
  }

  if (json->IsNumber()) {
    return FillShapeValueNumber(shaper, dst, json->ToNumber());
  }

  if (json->IsNumberObject()) {
    return FillShapeValueNumber(shaper, dst, v8::Handle<v8::NumberObject>::Cast(json));
  }

  if (json->IsString()) {
    return FillShapeValueString(shaper, dst, json->ToString());
  }

  if (json->IsStringObject()) {
    return FillShapeValueString(shaper, dst, v8::Handle<v8::StringObject>::Cast(json)->ValueOf());
  }

  else if (json->IsArray()) {
    return FillShapeValueList(isolate, shaper, dst, v8::Handle<v8::Array>::Cast(json), level, seenHashes, seenObjects, create);
  }

  if (json->IsObject()) {
    v8::Handle<v8::Object> o = json->ToObject();
    v8::Handle<v8::String> toJsonString = TRI_V8_PAIR_STRING("toJSON", 6);
    if (o->Has(toJsonString)) {
      v8::Handle<v8::Value> func = o->Get(toJsonString);
      if (func->IsFunction()) {
        v8::Handle<v8::Function> toJson = v8::Handle<v8::Function>::Cast(func);

        v8::Handle<v8::Value> args;
        v8::Handle<v8::Value> result = toJson->Call(o, 0, &args);

        if (! result.IsEmpty()) {
          return FillShapeValueString(shaper, dst, result->ToString());
        }
      }
    }

    // fall-through intentional
  
    // check for cycles
    int hash = o->GetIdentityHash();

    if (seenHashes.find(hash) != seenHashes.end()) {
      for (auto it = seenObjects.begin();  it != seenObjects.end();  ++it) {
        if (json->StrictEquals(*it)) {
          return TRI_ERROR_ARANGO_SHAPER_FAILED;
        }
      }
    }
    else {
      seenHashes.insert(hash);
    }

    seenObjects.push_back(o);
    int res = FillShapeValueArray(isolate, shaper, dst, json->ToObject(), level, seenHashes, seenObjects, create);
    seenObjects.pop_back();
    // cannot remove hash value from seenHashes because multiple objects might have the same
    // hash values (collisions)
    return res;
  }

  LOG_TRACE("shaper failed to convert object");
  return TRI_ERROR_BAD_PARAMETER;
}
Ejemplo n.º 4
0
/**
 *  Cast an ecmascript value to a PHP runtime value
 *
 *  @note   The value cannot be const, as retrieving properties
 *          from arrays and objects cannot be done on const values
 *
 *  @param  input   the value to cast
 *  @return Php::Value
 */
Php::Value value(v8::Handle<v8::Value> input)
{
    // if we received an invalid input we simply return an empty PHP value
    if (input.IsEmpty())            return nullptr;

    // as is typical in javascript, a value can be of many types
    // check the type of value that we have received so we can cast
    if (input->IsBoolean())         return input->BooleanValue();
    if (input->IsBooleanObject())   return input->BooleanValue();
    if (input->IsInt32())           return input->Int32Value();
    if (input->IsNumber())          return input->NumberValue();
    if (input->IsNumberObject())    return input->NumberValue();
    if (input->IsNull())            return nullptr;
    if (input->IsUndefined())       return nullptr;

    // special treatment for string-like types
    // TODO: javascript dates might possibly be cast to a DateTime object
    if (input->IsString() || input->IsStringObject() || input->IsRegExp())
    {
        // create the utf8 value (the only way to retrieve the content)
        v8::String::Utf8Value   utf8(input->ToString());

        // and create the value to return
        return {*utf8, utf8.length()};
    }

    // it could be callable too
    if (input->IsFunction())
    {
        // create the function as a pointer that can be captured
        auto function = std::make_shared<Stack<v8::Function>>(input.As<v8::Function>());

        // the result to return
        Php::Function result([function](Php::Parameters &params) {
            // create a "scope", so variables get destructed, retrieve the context and "enter" it
            v8::HandleScope                     scope(Isolate::get());
            v8::Local<v8::Context>              context((*function)->CreationContext());
            v8::Context::Scope                  contextScope(context);

            // catch any errors that occur while either compiling or running the script
            v8::TryCatch                        catcher;

            // create a new array with parameters
            std::vector<v8::Local<v8::Value>>   array;
            array.reserve(params.size());

            // iterate over all the given parameters and add them to the arrau
            for (auto &param: params) array.push_back(value(param));

            // now we can actually call the function
            v8::Local<v8::Value> result((*function)->Call(context->Global(), array.size(), array.data()));

            // did we catch an exception?
            if (catcher.HasCaught())
            {
                // retrieve the message describing the problem
                v8::Local<v8::Message>  message(catcher.Message());
                v8::Local<v8::String>   description(message->Get());

                // convert the description to utf so we can dump it
                v8::String::Utf8Value   string(description);

                // pass this exception on to PHP userspace
                throw Php::Exception(std::string(*string, string.length()));
            }

            // convert the result to a PHP value and return it
            return value(result);
        });

        // now return the result
        return result;
    }

    // or perhaps an object
    if (input->IsObject())
    {
        // retrieve the object and the first internal field
        auto object = input.As<v8::Object>();

        // does the object have internal fields?
        if (object->InternalFieldCount())
        {
            // retrieve the field
            auto field  = object->GetInternalField(0);

            // does it have an internal field and is it external? we are converting back
            // an original PHP object, just retrieve the original thing that came from PHP
            if (!field.IsEmpty() && field->IsExternal())
            {
                // the PHP value is stored in the first internal field,
                // retrieve it and create the handle around it
                Handle handle(field);

                // dereference and return it
                return *handle;
            }
        }

        // create a new js object and convert it to userspace
        return Php::Object("JS\\Object", new JSObject(object));
    }

    // we sadly don't support this type of value
    return nullptr;
}