lr_response_xml_to_json

xml_to_json.js

"use strict";
var xml2js = require('xml2js'),
       vsm = require('lrs/virtualServerModule');

// callback function that implements the xml-to-json gateway
function xml2json_converter(servReq, servRes, cliReq) {
   
  cliReq.on('response', function(response) {
    var body = [],
    body_len = 0;
    // condition for performing the conversion ...
    if ( ! ('Content-Type' in response.headers) ||
      ('Content-Type' in response.headers &&
        response.headers['Content-Type'].indexOf('/xml')  == -1) ) {
      response.bindHeaders(servRes);
      response.fastPipe(servRes);
      return;
    }
    response.on('data', function(chunk) {
      body.push(chunk);
      body_len += chunk.length;
    });
    response.on('end', function() {
      body = Buffer.concat(body, body_len);
      response.bindHeaders(servRes);
      xml2js.parseString(body, function(err, result) {
        if (err || ! result) {
          console.log('Parse error converting XML to json: '+err);
          servRes.end(body);
        }
        else {
          servRes.setHeader('Content-Type', 'application/json');
          servRes.end(JSON.stringify(result));
        }
      });
    });
    response.on('error', function(err) {
      //console.log("error seen on response: "+err);
    });
  });
  cliReq();
}

vsm.on('exist', 'xml2json_gateway', function(vs) {
  vs.on('request', xml2json_converter);
});