@vara/custom-logic-sdk/src/services/protocol-handler.js

Server Side JavaScript SDK for Custom Business Logic

/**
 * Created by stevenchin on 2/2/17.
 */

const CHAR_ENCODINGS = require('../constants/constants').CUSTOM_LOGIC.FUNCTIONS.CHAR_ENCODINGS;

const protocolHandler = {};

const protocolHandlers = {};

/**
 * Encodes body parameter for transport. Returns the encoded body and the encoding used
 * @param body {*} - body to encode, it can be a string, buffer, object, etc.
 * @returns {{encoding, body}}
 */
protocolHandler.getEncodedBody = function getEncodedBody(body) {
  let data = body;
  let encoding = CHAR_ENCODINGS.UTF8;

  if (data instanceof Buffer) {
    encoding = CHAR_ENCODINGS.BASE64;
    data = data.toString(encoding);
  }
  // TODO: handle a stream

  return { encoding, body: data };
};

protocolHandler.getHandler = function getHandler(protocolVersion) {
  return protocolHandlers[protocolVersion];
};

protocolHandler.addHandler = function addHandler(protocolVersion, handler) {
  protocolHandlers[protocolVersion] = handler;
};

module.exports = protocolHandler;