Node platform api crud

<source lang='javascript'> var async = require('async');

var url, result, options; var payload = {'resource':[{'name':'test','complete':false}]};

options = {

   'headers': {
       'X-DreamFactory-Api-Key': platform.session.api_key,
       'X-DreamFactory-Session-Token': platform.session.session_token,
       'Content-Type': 'application/json'
   }

};

var id1, id2;

function createInternal(callback) {

   // create a record using internal URL
   url = 'db/_table/todo';
   platform.api.post(url, payload, null, function(body, response) {
       result = JSON.parse(body);
       if (!result) {
           callback('Unexpected response from url = ' + url);
       } else if (result.error) {
           callback(result.error.message);
       } else if (!result.resource || result.resource.length !== 1) {
           callback('Unexpected response from url = ' + url);
       } else {
           id1 = result.resource[0].id;
           console.log('internal URL created ' + result.resource.length +  ' records');
           callback();
       }
   });

}

function createExternal(callback) {

   // create a record using external URL
   url = 'http://localhost:8080/api/v2/db/_table/todo';
   platform.api.post(url, payload, options, function(body, response) {
       result = JSON.parse(body);
       if (!result) {
           callback('Unexpected response from url = ' + url);
       } else if (result.error) {
           callback(result.error.message);
       } else if (!result.resource || result.resource.length !== 1) {
           callback('Unexpected response from url = ' + url);
       } else {
           id2 = result.resource[0].id;
           console.log('external URL created ' + result.resource.length +  ' records');
           callback();
       }
   });

}

function getInternal(callback) {

   // get records using internal URL
   url = 'db/_table/todo';
   platform.api.get(url, null, function(body, response) {
       result = JSON.parse(body);
       if (!result) {
           callback('Unexpected response from url = ' + url);
       } else if (result.error) {
           callback(result.error.message);
       } else if (!result.resource) {
           callback('Unexpected response from url = ' + url);
       } else {
           console.log('internal URL found ' + result.resource.length +  ' records');
           callback();
       }
   });

}

function getExternal(callback) {

   // get records using external URL
   url = 'http://localhost:8080/api/v2/db/_table/todo';
   platform.api.get(url, options, function(body, response) {
       result = JSON.parse(body);
       if (!result) {
           callback('Unexpected response from url = ' + url);
       } else if (result.error) {
           callback(result.error.message);
       } else if (!result.resource) {
           callback('Unexpected response from url = ' + url);
       } else {
           console.log('external URL found ' + result.resource.length +  ' records');
           callback();
       }
   });

}

function updateInternal(callback) {

   // update a record using internal URL
   url = 'db/_table/todo/' + id1;
   platform.api.patch(url, payload, null, function(body, response) {
       result = JSON.parse(body);
       if (!result) {
           callback('Unexpected response from url = ' + url);
       } else if (result.error) {
           callback(result.error.message);
       } else {
           console.log('internal URL updated 1 record');
           callback();
       }
   });

}

function updateExternal(callback) {

   // update a record using external URL
   url = 'http://localhost:8080/api/v2/db/_table/todo/' + id2;
   platform.api.patch(url, payload, options, function(body, response) {
       result = JSON.parse(body);
       if (!result) {
           callback('Unexpected response from url = ' + url);
       } else if (result.error) {
           callback(result.error.message);
       } else {
           console.log('external URL updated 1 record');
           callback();
       }
   });

}

function deleteInternal(callback) {

   // delete a record using internal URL
   url = 'db/_table/todo/' + id1;
   platform.api.delete(url, null, null, function(body, response) {
       result = JSON.parse(body);
       if (!result) {
           callback('Unexpected response from url = ' + url);
       } else if (result.error) {
           callback(result.error.message);
       } else {
           console.log('internal URL deleted 1 record');
           callback();
       }
   });

}

function deleteExternal(callback) {

   // delete a record using external URL
   url = 'http://localhost:8080/api/v2/db/_table/todo/' + id2;
   platform.api.delete(url, null, options, function(body, response) {
       result = JSON.parse(body);
       if (!result) {
           callback('Unexpected response from url = ' + url);
       } else if (result.error) {
           callback(result.error.message);
       } else {
           console.log('external URL deleted 1 record');
           callback();
       }
   });

}

async.series([

       function (callback) {
           createInternal(callback)
       },
       function (callback) {
           createExternal(callback)
       },
       function (callback) {
           getInternal(callback)
       },
       function (callback) {
           getExternal(callback)
       },
       function (callback) {
           updateInternal(callback)
       },
       function (callback) {
           updateExternal(callback)
       },
       function (callback) {
           deleteInternal(callback)
       },
       function (callback) {
           deleteExternal(callback)
       }
   ],
   function(err) {
       if (err) {
           throw new Error(err);
       } else {
           event.setResponse({'result': 'ok'}, 200, 'application/json');
       }
   });

</source>