How to use string_decoder - 10 common examples

/*
 * This is an example of a Node.js program to subscribe to publications
 * made through IBM MQ.
 *
 * The topic and queue manager name can be given as parameters on the
 * command line. Defaults are coded in the program.
 *
 */

// Import the MQ package
var mq = require('ibmmq');
var MQC = mq.MQC; // Want to refer to this export directly for simplicity

// Import any other packages needed
var StringDecoder = require('string_decoder').StringDecoder;
var decoder = new StringDecoder('utf8');

// The queue manager and queue to be used
var qMgr = "QM1";
var topicString = "dev/JSTopic";

// Global variables
var ok = true;


// Define some functions that will be used from the main flow
function getMessages(hObj) {
  while (ok) {
    getMessage(hObj);
  }
}

self._ttyWrite(s, key);
  }

  function onresize() {
    self._refreshLine();
  }

  if (!this.terminal) {
    input.on('data', ondata);
    input.on('end', onend);
    self.once('close', function() {
      input.removeListener('data', ondata);
      input.removeListener('end', onend);
    });
    var StringDecoder = require('string_decoder').StringDecoder; // lazy load
    this._decoder = new StringDecoder('utf8');

  } else {

    exports.emitKeypressEvents(input);

    // input usually refers to stdin
    input.on('keypress', onkeypress);

    // Current line
    this.line = '';

    this._setRawMode(true);
    this.terminal = true;

    // Cursor position on the line.
    this.cursor = 0;

InternalCodec.prototype.decoder = InternalDecoder;

//------------------------------------------------------------------------------

// We use node.js internal decoder. Its signature is the same as ours.
var StringDecoder = require('string_decoder').StringDecoder;

if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
    StringDecoder.prototype.end = function() {};


function InternalDecoder(options, codec) {
    StringDecoder.call(this, codec.enc);
}

InternalDecoder.prototype = StringDecoder.prototype;


//------------------------------------------------------------------------------
// Encoder is mostly trivial

function InternalEncoder(options, codec) {
    this.enc = codec.enc;
}

InternalEncoder.prototype.write = function(str) {
    return Buffer.from(str, this.enc);
}

InternalEncoder.prototype.end = function() {
}

InternalCodec.prototype.decoder = InternalDecoder;

//------------------------------------------------------------------------------

// We use node.js internal decoder. Its signature is the same as ours.
var StringDecoder = require('string_decoder').StringDecoder;

if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
    StringDecoder.prototype.end = function() {};


function InternalDecoder(options, codec) {
    StringDecoder.call(this, codec.enc);
}

InternalDecoder.prototype = StringDecoder.prototype;


//------------------------------------------------------------------------------
// Encoder is mostly trivial

function InternalEncoder(options, codec) {
    this.enc = codec.enc;
}

InternalEncoder.prototype.write = function(str) {
    return Buffer.from(str, this.enc);
}

InternalEncoder.prototype.end = function() {
}

this.decoder = InternalDecoderCesu8;
            this.defaultCharUnicode = iconv.defaultCharUnicode;
        }
    }
}

InternalCodec.prototype.encoder = InternalEncoder;
InternalCodec.prototype.decoder = InternalDecoder;

//------------------------------------------------------------------------------

// We use node.js internal decoder. Its signature is the same as ours.
var StringDecoder = require('string_decoder').StringDecoder;

if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
    StringDecoder.prototype.end = function() {};


function InternalDecoder(options, codec) {
    StringDecoder.call(this, codec.enc);
}

InternalDecoder.prototype = StringDecoder.prototype;


//------------------------------------------------------------------------------
// Encoder is mostly trivial

function InternalEncoder(options, codec) {
    this.enc = codec.enc;
}

if (new Buffer('eda0bdedb2a9', 'hex').toString() !== '💩') {
            this.decoder = InternalDecoderCesu8;
            this.defaultCharUnicode = iconv.defaultCharUnicode;
        }
    }
}

InternalCodec.prototype.encoder = InternalEncoder;
InternalCodec.prototype.decoder = InternalDecoder;

//------------------------------------------------------------------------------

// We use node.js internal decoder. Its signature is the same as ours.
var StringDecoder = require('string_decoder').StringDecoder;

if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
    StringDecoder.prototype.end = function() {};


function InternalDecoder(options, codec) {
    StringDecoder.call(this, codec.enc);
}

InternalDecoder.prototype = StringDecoder.prototype;


//------------------------------------------------------------------------------
// Encoder is mostly trivial

function InternalEncoder(options, codec) {
    this.enc = codec.enc;
}

//------------------------------------------------------------------------------

// We use node.js internal decoder. It's signature is the same as ours.
var StringDecoder = require('string_decoder').StringDecoder;

if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
    StringDecoder.prototype.end = function () {
    };


function InternalDecoder(options, codec) {
    StringDecoder.call(this, codec.enc);
}

InternalDecoder.prototype = StringDecoder.prototype;


//------------------------------------------------------------------------------
// Encoder is mostly trivial

function InternalEncoder(options, codec) {
    this.enc = codec.enc;
}

InternalEncoder.prototype.write = function (str) {
    return new Buffer(str, this.enc);
}

InternalEncoder.prototype.end = function () {
}

if (new Buffer("eda080", 'hex').toString().length == 3) {
            this.decoder = InternalDecoderCesu8;
            this.defaultCharUnicode = iconv.defaultCharUnicode;
        }
    }
}

InternalCodec.prototype.encoder = InternalEncoder;
InternalCodec.prototype.decoder = InternalDecoder;

//------------------------------------------------------------------------------

// We use node.js internal decoder. Its signature is the same as ours.
var StringDecoder = require('string_decoder').StringDecoder;

if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
    StringDecoder.prototype.end = function() {};


function InternalDecoder(options, codec) {
    StringDecoder.call(this, codec.enc);
}

InternalDecoder.prototype = StringDecoder.prototype;


//------------------------------------------------------------------------------
// Encoder is mostly trivial

function InternalEncoder(options, codec) {
    this.enc = codec.enc;
}

if (new Buffer("eda080", 'hex').toString().length == 3) {
            this.decoder = InternalDecoderCesu8;
            this.defaultCharUnicode = iconv.defaultCharUnicode;
        }
    }
}

InternalCodec.prototype.encoder = InternalEncoder;
InternalCodec.prototype.decoder = InternalDecoder;

//------------------------------------------------------------------------------

// We use node.js internal decoder. Its signature is the same as ours.
var StringDecoder = require('string_decoder').StringDecoder;

if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
    StringDecoder.prototype.end = function() {};


function InternalDecoder(options, codec) {
    StringDecoder.call(this, codec.enc);
}

InternalDecoder.prototype = StringDecoder.prototype;


//------------------------------------------------------------------------------
// Encoder is mostly trivial

function InternalEncoder(options, codec) {
    this.enc = codec.enc;
}

InternalCodec.prototype.decoder = InternalDecoder;

//------------------------------------------------------------------------------

// We use node.js internal decoder. It's signature is the same as ours.
var StringDecoder = require('string_decoder').StringDecoder;

if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
    StringDecoder.prototype.end = function() {};


function InternalDecoder(options, codec) {
    StringDecoder.call(this, codec.enc);
}

InternalDecoder.prototype = StringDecoder.prototype;


//------------------------------------------------------------------------------
// Encoder is mostly trivial

function InternalEncoder(options, codec) {
    this.enc = codec.enc;
}

InternalEncoder.prototype.write = function(str) {
    return new Buffer(str, this.enc);
}

InternalEncoder.prototype.end = function() {
}