Hi im trying to send data from my titanium app to my Apache Web Service. The snippet of titanium code works as the output to the console is success. Now what im trying to do is when the post is sent, display the contents of the post on the web service page. Is my doPost correct?
Titanium Snippet
button.addEventListener('click', function(e) {
var params = {
"places" : {
Country : textCountry.getValue(),
Capital : textCapital.getValue()
}
};
var xhr = Ti.Network.createHTTPClient({});
// function to deal with errors
xhr.onerror = function() {
Ti.API.info('error, HTTP status = ' + this.status);
alert('Error Sending Data');
};
// function to deal with response
xhr.onload = function() {
console.log('success, HTTP status = ' + this.status);
};
xhr.open("POST", 'http://130.206.127.43:8080/Test');
//set enconding
xhr.setRequestHeader("Content-Type", "application/json; charset=utf-8");
xhr.send(JSON.stringify(params));
});
Java Servlet/Apache Tomcat Snippet
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
String jsonData = request.getParameter("json");
response.setContentType("applicaiton/json");
PrintWriter out= response.getWriter();
out.println(jsonData);
out.close();
}
18/02/205
// function to deal with response
xhr.onload = function() {
console.log('success, HTTP status = ' + this.status);
Ti.API.info('json' + this.responseText);
};
[INFO] : success, HTTP status = 200
[INFO] : json = null
Set a breakpoint in the xhr.onload and look at the variables that are present before your write your log.
You are looking for the this.responseText, which will have the response from your call to the Java servlet. I mainly use WCF and C# and if I don't setup the WCF service specifically to clean-up the output, it will add the function name to the response.
Generally, my onload looks like this.
xhr.onload = function(){
var result = JSON.parse(this.responseText);
Ti.API.log(result);
}
* Look closer at your Java Servlet return type. It is a VOID return type so no data will be returned to the http call. *
http://docs.appcelerator.com/titanium/3.0/#!/api/Titanium.Network.HTTPClient
Related
i have angular controller which triggered with ng-click:
app.controller('showAllWorkersContoller', function($scope, $http){
$http.get("/SafetyManager/workers").success(function(response){
$scope.workers = response;
$scope.workerInfo = function(id){
$http({
url: '/SafetyManager/workers',
method: "POST",
data: { 'ID' : id },
}).success(function(response){
$scope.info = response;
});
};
});
});
and when i check on chrome debug it sends in form data: {'ID':"1"} (or any other id num according to the worker i click on)
but when the Servlet get the request:
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("post request to Workers (get worker by id )");
String id = request.getParameter("ID");
System.out.println("this id is: " + id);
}
its print :
post request to Workers (get worker by id )
this id is: null
how can i get the ID value in the servlet?
The data that you post will not be available as a request parameter, it is in the request body.
You can use a reader to read content from body.
Refer: Getting request payload from POST request in Java servlet
You have to use req.getAttribute(name) to get body content.
Refer this blog:
Difference between getAttribute() and getParameter()
For my application I am writing a POST request to send array of parameters from a checkbox list. Its working for get request but not working for post request. What is the error in my code.
My code on the client side for sending ajax request to the server.
$(".add").click(function(){
monitoring.length=0;
nonMonitoring.length=0;
$('.modal-body input:checked').each(function() {
monitoring.push($(this).val());
});
$('.addkeywords input:checked').each(function() {
nonMonitoring.push($(this).val());
});
// alert(monitoring[2]+ " " + nonMonitoring[2]);
var monitoringLength=monitoring.length;
var nonMonitoringLength=nonMonitoring.length;
$.ajax({
type : "POST",
url : '/rest/channelstats/my/rest/controller',
data : {
// monitoring : monitoring,
// nonMonitoring: nonMonitoring,
monitoringLength: monitoringLength,
nonMonitoringLength: nonMonitoringLength,
},
success : function(data) {
// var keywordsList=data
//console.log(keywordsList);
// htm = "" ;
}
});
})
My java code on the server side.
#RequestMapping(value="/rest/channelstats/my/rest/controller",method = RequestMethod.POST)
public void monitorKeywords(#RequestParam(value="monitoringLength",required=true)int monitoringLength,#RequestParam(value="nonMonitoringLength",required=true)int nonMonitoringLength){
System.out.println("MonitoringLength =>" +monitoringLength);
System.out.println("NonMonitoringLength=>" +nonMonitoringLength);
}
}
Its working for HTTP GET requests but not working for POST requests.How should I solve this problem?
According to your jquery post request, you should use DAO(Data Access Object) to parse the request data. So you should add class Request
public class Request {
private int monitoringLength;
private int nonMonitoringLength;
//getters and setters
}
And change controller to
#RequestMapping(value="/rest/channelstats/my/rest/controller",method = RequestMethod.POST)
public void monitorKeywords(#RequestBody Request request){
System.out.println("MonitoringLength =>"+request.getMonitoringLength());
System.out.println("NonMonitoringLength=>"+request.getNonMonitoringLength());
}
I created InformationServlet that whenever I need some details I can send it what I want (with AJAX) and it will return me the information.
I searched how to do it on Ajax and according to:
How to send parameter to a servlet using Ajax Call
I used: url: "InformationServlet?param=numberOfPlayers"
But on the servlet the request's attributes doesn't contain the parameter I sent so I suppose I am not doing it correctly:
you can see that the attributes size is zero
Servlet:
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
Gson gson = new Gson();
Engine engine = (Engine)getServletContext().getAttribute("engine");
String responseJson = "";
if(request.getAttribute("numberOfPlayers") != null)
{
String numberOfPlayers = "";
numberOfPlayers = gson.toJson(String.valueOf(engine.GetNumOfPlayers()));
responseJson = numberOfPlayers;
}
out.print(responseJson);
} finally {
out.close();
}
}
JavaScript (AJAX request):
function getNumberOfPlayersAndPrintSoldiers()
{
$.ajax({
url: "InformationServlet?param=numberOfPlayers",
timeout: 2000,
error: function() {
console.log("Failed to send ajax");
},
success: function(numberOfPlayers) {
var r = numberOfPlayers;
}
});
}
Edit:
you probably want to use getParameter and not getAttribute
Moreover, please pay attention to the order of parameter name and his value:
request.getParameter("param");
instad of:
request.getParameter("numberOfPlayers");
because the url form contains parameter name first and then the parameter value. for example:
myurl.html?param=17
and if more parameters needed then use the separator & sign
myurl.html?firstName=bob&age=5
I am using Jquerys Ajax method to talk to my web service. The code seems OK, but I just monitored HTTP traffic using HTTPFox firefox plugin and I noticed unexpected results. To begin with, I am setting the ContentType as application/json and my web service is also producing JSON data but HTTPFox indicates Content Type for my HTTP requests as application/vnd.sun.wadl+xml (NS_ERROR_DOM_BAD_URI).
The Request Method is GET as set in my Ajax request, but HTTPFox indicates my Request method as OPTIONS. And while the Request succeeds and data is returned, the onSuccess method of my Ajax request is not called. Instead, the onError method is called. HTTP Fox is able to capture the data from my web service as response. See the image for HTTP Fox.
Finally, all other request from other processes in my browser seem OK but my HTTP requests are flagged 'RED' by HTTP Fox. The request from other pages and processes seem OK.( GREEN or WHITE).
I have attached screenshot of HTTPFox highlighted on one of my Request. The flagged ones are also from my application.
Image:
I have also pasted the Ajax code I am using to make the HTTP Requests.
window.onload = function() {
var seq_no = getParameterByName("seq_no");
var mileage = getParameterByName("mileage");
document.getElementById("seq_no").value = seq_no;
document.getElementById("mileage").value = mileage;
var param = 'vehReg='+encodeURIComponent(document.getElementById('vehReg').value);
// alert(param);
loadVehicleInfo(param);
};
function loadVehicleInfo(params) {
$("#message").html('<p><font color="green">Loading...</font></p>');
$.ajax({
type: "GET",
url: "http://localhost:8080/stockcloud/rest/vehicles/info",
data: params,
contentType: "application/json; charset=utf-8",
dataType: "json",
success:
function(data,status) {
$("#message").empty();
$("#message").html('<p>'+getAsUriParameters(data)+'</p>');
},
error :
function(XMLHttpRequest, textStatus, errorThrown) {
$("#message").html("<p> <font color='red'>The following error occurred: " +textStatus+ ': '+errorThrown+ "</font>");
}
});
};
function getAsUriParameters (data) {
return Object.keys(data).map(function (k) {
if (_.isArray(data[k])) {
var keyE = encodeURIComponent(k + '[]');
return data[k].map(function (subData) {
return keyE + '=' + encodeURIComponent(subData);
}).join('&');
} else {
return encodeURIComponent(k) + '=' + encodeURIComponent(data[k]);
}
}).join('&');
};
function getParameterByName(name) {
name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
results = regex.exec(location.search);
return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}
Server side Code for the request:
#Path("/vehicles")
public class VehiclesService {
#GET
#Path("info")
#Produces("application/json")
public Response getVehicleInfo(#DefaultValue("__DEFAULT__") #QueryParam("vehReg") String vehReg) {
// Send SOAP Message to SOAP Server
ServerResponse resp = new ServerResponse();
if("__DEFAULT__".equals(vehReg)) {
resp.setError("Vehicle registration must be supplied as a query parameter: ?vehReg=<THE REG NO>");
resp.setResult(false);
Response.status(Response.Status.BAD_REQUEST).entity(resp).build();
}
try {
// actual code to return the car info and return XML string with the info.
connection.disconnect();
String xml = URLDecoder.decode(s.toString(),"UTF-8");
xml = xml.replace("<", "<").replace(">", ">").replace("<?xml version='1.0' standalone='yes' ?>", "");
System.out.println(xml);
resp.setVehicle(new VehicleParse().parse(xml));
resp.setResult(true);
} catch(Exception e) {
resp.setResult(false);
resp.setError(e.getMessage());
e.printStackTrace();
Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(resp).build();
}
return Response.status(Response.Status.OK).entity(resp).build();
}
}
Is there something I am not doing right?
Thanks.
I have a servlet that adds a user to a file on the server side.
I invoke it with a jqueries ajax call.
I can see on the server that the method is being called correctly and my user is added, but the error callback is being invoked on the jquery call. All the status text says is error.
Using firebug the response seems to be empty. Why can I not get a success jquery callback?
//Servlet Code
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String action = request.getParameter("action");
String responseStr = "";
if(action.equals("addUser"))
{
responseStr = addUser(request);
}
System.out.println("Reponse:" + responseStr);
response.setContentType("application/json");
response.setCharacterEncoding("utf-8");
response.getWriter().println(responseStr);
}
private String addUser(HttpServletRequest request) throws IOException
{
Storage s;
s = Storage.load();
String name = request.getParameter("name");
String imageUrl = request.getParameter("imageUrl");
User u = new User();
u.setName(name);
u.setImageUrl(imageUrl);
s.addUser(u);
s.save();
return "success";
}
.
//javascript code
function addUser() {
var name = $('#name').val();
var imageUrl = $('#imageUrl').val();
var url = "http://ws06525:8080/QCHounds/QCHoundServlet?action=addUser&name=${name}&imageUrl=${imageUrl}";
url = url.replace("${name}", name);
url = url.replace("${imageUrl}", imageUrl);
$('#result').html(url);
$.ajax({
url: url,
success: function( data ) {
$('#result').html(data);
},
error: function(jqXHR, textStatus, errorThrown)
{
alert("error: " + textStatus);
alert("error: " + errorThrown);
}
});
}
Aaargh! Feel like an idiot. It's a cross site scripting issue.
I was testing the call to the server from the html file on disk so my browser address was
file://projects/myproject/content/Users.html <<< Fail
instead of:
http://myboxname:8080/appname/Users.html <<< Works
The actual code is fine...
use this for learn what is the problem, it will be better for get solution i think
error: function(e){
alert(JSON.stringify(e))
}
For one thing the string "success" isn't valid json. If your ajax query is expecting json, that would fail it.
What if you returned "{ \"success\": true }" ?
EDIT
It looks like from your ajax call that the response shouldn't be json, why is your return content type json?
If it is true that firebug shows no response, your problem must be in the java code that writes the response.