yog-ral/lib/ext/converter/mcpackConverter.js

node-ral with mcpack and nshead

/*
 * fis
 * http://fis.baidu.com/
 * 2014/8/14
 */

'use strict';

var Converter = require('node-ral').Converter;
var logger = require('node-ral').Logger('McPackConverter');
var util = require('util');
var mcpack;
var iconv = require('iconv-lite');

try {
    mcpack = require('@baidu/mcpack');
}
catch (e) {
    logger.warning('mcpack module load failed');
}

function McPackConverter() {
    Converter.call(this);
}

util.inherits(McPackConverter, Converter);

McPackConverter.prototype.unpack = function (config, data) {
    try {
        if (!mcpack) {
            throw new Error('mcpack is not ready');
        }
        if (!data) {
            throw new Error('invalid data data=' + data);
        }
        var obj = mcpack.decode(data, {
            encoding: config.encoding
        });
        logger.trace('unpack mcpack data succ ServiceID=' + config.serviceID);
        return obj;
    }
    catch (ex) {
        logger.notice('unpack mcpack data failed ServiceID=' + config.serviceID);
        throw ex;
    }
};

McPackConverter.prototype.pack = function (config, data) {
    data = data || {};
    var buffer;
    try {
        if (!mcpack) {
            throw new Error('mcpack is not ready');
        }
        //check if encoding is supported
        iconv.getCodec(config.encoding);
        buffer = mcpack.encode(data, {
            encoding: config.encoding
        });
    }
    catch (e) {
        logger.notice('pack json data failed data=' + data + ' ServiceID=' + config.serviceID);
        throw e;
    }
    logger.trace('pack json data succ ServiceID=' + config.serviceID);
    return buffer;
};

McPackConverter.prototype.getName = function () {
    return 'mcpack2';
};

module.exports = McPackConverter;