Retrieving of Restful web service values in android for Titanium - appcelerator

Question

We are using the same restful web service code from serviceutility.js for both android and ios. But the service is getting hit and values are retrieved only in ios. The same code is not working in android and we are getting the following error:
[ERROR] : TiExceptionHandler: (main) [2,821093] - In alloy/controllers/home.js:25,32
[ERROR] : TiExceptionHandler: (main) [0,821093] - Message: Uncaught TypeError: Cannot read property 'status' of null
[ERROR] : TiExceptionHandler: (main) [0,821093] - Source: if ("1" == response.status) alert(response.message); else if ("0"
[ERROR] : V8Exception: Exception occurred at alloy/controllers/home.js:25: Uncaught TypeError: Cannot read property 'status' of null.
Titanium SDK is 5.1.2 GA
exports.login = function(user, cb) {
var response = null;
if (Ti.Network.online) {
var xhr = Ti.Network.createHTTPClient({
timeout : 10000,
validatesSecureCertificate : false
});
xhr.onload = function() {// Onload
var responseTxt = this.responseText == '' ? '{}' : this.responseText;
try {
response = JSON.parse(responseTxt);
cb(response, 'SUCCESS');
} catch(e) {
cb(response, 'ERROR');
}
};
xhr.onerror = function(e) {
if (xhr.status === 0) {
cb(response, 'TIMEDOUT');
} else {
cb(response, 'ERROR');
}
};
url = "https://";
var postData = {
employeeId : user.employeeId,
password : user.password
};
xhr.open('POST', url);
xhr.setTimeout(10000);
xhr.setRequestHeader('employeeId', user.employeeId);
xhr.setRequestHeader('password', user.password);
xhr.send();} else {
cb(response, 'NO_NETWORK');
}};
The below code is for index.js file where the actual retrieval of values happen.
if (Ti.Network.online) {
loginUtil.login(user, function(response, status) {
Ti.API.info("status----" + status);
if (response.status == "0") {
Ti.API.info("status== " + response.status);
Ti.App.role = response.role;
Alloy.createController('home', {employeeId:$.userTextField.value,password:$.passwordTextField.value,from:"index"}).getView().open();
} else if (response.status == '1') {
alert(response.message);
} else {
alert("Please enter the correct credentials");
}
});
}
Please help us on this.

Answer 1

Looks like you are ONLY returning a string value instead of the entire response object. Then in your controller you attempt to access the .status property of the response object.
//this line returns the string responseTxt
response = JSON.parse(responseTxt);
Try returning the entire response object instead.
response = JSON.parse(this);
Then in your index.js controller use/ display the status property
alert(response.status);

Answer 2

Your index.js expected response to be an object, but that is only the case where you call callback like this:
response = JSON.parse(responseTxt);
cb(response, 'SUCCESS');
All other places where you call callback the response variable is null, since that is what you initialise it with on the second line.

Answer 3

Your callback returns two parameters, response & status, the second param is never used.
From reading the login function code, you only get to access the response object if status == "SUCCESS"
if(status === "SUCCESS"){
if (response.status == "0") {
Ti.API.info("status== " + response.status);
Ti.App.role = response.role;
Alloy.createController('home', {employeeId:$.userTextField.value,password:$.passwordTextField.value,from:"index"}).getView().open();
} else if (response.status == '1') {
alert(response.message);
} else {
alert("Please enter the correct credentials");
}
}
else {
alert("whoops, please try again !"); // a more generic message.
}