I was able to call an HTTP endpoint using Postman and these parameters:
{
"name":"Val",
"subject":"Test"
}
However I am unable to do the same with Volley through Android: Here is trying to use JSONRequest:
HashMap<String, String> params2 = new HashMap<String, String>();
params.put("name", "Val");
params.put("subject", "Test Subject");
JsonObjectRequest jsObjRequest = new JsonObjectRequest
(Request.Method.POST, Constants.CLOUD_URL, new JSONObject(params2), new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
mView.showMessage("Response: " + response.toString());
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
mView.showMessage(error.getMessage());
}
});
// Access the RequestQueue through your singleton class.
VolleySingleton.getInstance(mContext).addToRequestQueue(jsObjRequest);
And here is trying StringRequest
private void postMessage(Context context, final String name, final String subject ){
RequestQueue queue = Volley.newRequestQueue(context);
StringRequest sr = new StringRequest(Request.Method.POST, Constants.CLOUD_URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
mView.showMessage(response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}){
#Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put("name", name);
params.put("subject", subject);
return params;
}
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String,String> params = new HashMap<String, String>();
params.put("Content-Type","application/x-www-form-urlencoded");
return params;
}
};
queue.add(sr);
}
When I use JSONRequest, the call POSTs but no parameter is passed and when I use StringRequest I get the error below? How can I pass JSON data to Volley call?
E/Volley: [13053] BasicNetwork.performRequest: Unexpected response code 400 for
Here is the server code that handles the request
public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
var helloRequest = await req.Content.ReadAsAsync<HelloRequest>();
var name = helloRequest?.Name ?? "world";
var responseMessage = $"Hello {personToGreet}!";
log.Info($"Message: {responseMessage}");
return req.CreateResponse(HttpStatusCode.OK, $"All went well.");
}
public class HelloRequest
{
public string Name { get; set; }
public string Subject { get; set; }
}
The server code is expecting a JSON object is returning string or rather Json string.
JsonObjectRequest
JSONRequest sends a JSON object in the request body and expects a JSON object in the response. Since the server returns a string it ends up throwing ParseError
StringRequest
StringRequest sends a request with body type x-www-form-urlencoded but since the server is expecting a JSON object. You end up getting 400 Bad Request
The Solution
The Solution is to change the content-type in the string request to JSON and also pass a JSON object in the body. Since it already expects a string you response you are good there. Code for that should be as follows.
StringRequest sr = new StringRequest(Request.Method.POST, Constants.CLOUD_URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
mView.showMessage(response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
mView.showMessage(error.getMessage());
}
}) {
#Override
public byte[] getBody() throws AuthFailureError {
HashMap<String, String> params2 = new HashMap<String, String>();
params2.put("name", "Val");
params2.put("subject", "Test Subject");
return new JSONObject(params2).toString().getBytes();
}
#Override
public String getBodyContentType() {
return "application/json";
}
};
Also there is a bug here in the server code
var responseMessage = $"Hello {personToGreet}!";
Should be
var responseMessage = $"Hello {name}!";
Add the content type in the header
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
You are using params.put instead of params2.put in your hash map while passing parameters.
because your object name is params2
Related
I want to send three parameters "guestEmail", "latitude" and "longitude" to backend and get a message of success from backend if it is successful.
I have tried doing this:
public void myGetFunc()
{
final String url = "....";
// prepare the Request
JsonObjectRequest getRequest = new JsonObjectRequest(Request.Method.GET, url, null,
new Response.Listener<JSONObject>()
{
#Override
public void onResponse(JSONObject response) {
// display response
Log.d("Response", response.toString());
Toast.makeText(getApplicationContext(), response.toString(), Toast.LENGTH_SHORT).show();
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
Log.d("Error.Response", response);
}
}
)
{
#Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<String, String> ();
params.put("guestEmail", "abc#xyz.com");
params.put("latitude", "12");
params.put("longitude", "12");
return params;
}
};
// add it to the RequestQueue
queue.add(getRequest);
}
This method is invoked when the 'SOS' button is clicked.
But right now, nothing happens on clicking the 'SOS' button.
Please help!
If you are going to use GET you query parameters and build the string yourself
private static final String URL = "http://www.test.com?value1={val1}&value2={val2}";
String requestString = URL;
requestString.replace("{val1}", "1");
requestString.replace("{val2}", "Bob");
StringRequest strreq = new StringRequest(Request.Method.GET,
requestString,
new Response.Listener<String>() {
#Override
public void onResponse(String Response) {
// get response
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError e) {
e.printStackTrace();
}
});
Volley.getInstance(this).addToRequestQueue(strreq);
If you are going to use POST us a body
public class LoginRequest extends Request<String> {
// ... other methods go here
private Map<String, String> mParams;
public LoginRequest(String param1, String param2, Listener<String> listener, ErrorListener errorListener) {
super(Method.POST, "http://test.url", errorListener);
mListener = listener;
mParams = new HashMap<String, String>();
mParams.put("paramOne", param1);
mParams.put("paramTwo", param2);
}
#Override
public Map<String, String> getParams() {
return mParams;
}
}
If you want to pass parameters than you need to use POST method otherwise for GET , just pass values in URL itself.
I am looking to do as per the image says:
Following is the code I am trying to implement from that image:
RequestQueue queue = Volley.newRequestQueue(this);
String url ="https://api.kairos.com/enroll";
StringRequest stringRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
// Display the first 500 characters of the response string.
Log.i("Response is: " , response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// mTextView.setText("That didn't work!");
}
})
{
#Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<String, String>();
params.put("app_id", "4985f625");
params.put("app_key", "aa9e5d2ec3b00306b2d9588c3a25d68e");
return params;
}
};
// Add the request to the RequestQueue.
queue.add(stringRequest);
Now I do not get how to add that JSONObject part into my POST Request, and also how to add the Content-Type Header.
I found a similar question here. See the code below. You have to override the getBodyContentType method.
public String getBodyContentType()
{
return "application/json";
}
for content type header you can do the following
StringRequest request = new StringRequest(Request.Method.PUT,
url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
listener.onResponse(response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(#NonNull VolleyError error) {
if (error.networkResponse != null) {
errorListener.onErrorResponse(error.networkResponse.statusCode, null);
} else {
Log.e(TAG, "An error occurred while trying to verify sms: ", error);
errorListener.onErrorResponse(500, null);
}
}
}) {
#NonNull
#Override
protected Map<String, String> getParams() {
return data;
}
#NonNull
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<>();
headers.put("Content-Type",
"application/x-www-form-urlencoded");
return headers;
}
};
And for send Json object I suggest create Json object like this
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("11", 3);
jsonObject.put("12", 4);
jsonObject.put("13", 5);
} catch (JSONException e) {
e.printStackTrace();
}
Then you can pass this object as string by jsonObject.toString() and pass it in parameters like pass any string like the following
#NonNull
#Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("json", jsonObject.toString();
return params;
}
I'm trying to use KairosAPI's enroll POST request using Android Volley. However I keep getting Error 1002, image one or more required parameters are missing. I've tried two ways to add the parameters into the body of the JSON, which I've outlined in the code.
This is my code-
public class MainActivity extends AppCompatActivity {
RequestQueue requestQueue;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
postRequestToEnrollPersonInGallery();
}
public void postRequestToEnrollPersonInGallery() {
final String appId = "3e12****";
final String appKey = "156e06fd782a3304f085f***********";
String mainUrl = "https://api.kairos.com/";
String enrollRequestUrl = "enroll";
requestQueue = Volley.newRequestQueue(this);
StringRequest stringRequest = new StringRequest(Request.Method.POST, mainUrl + enrollRequestUrl, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d("Volley", response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley", error.toString());
}
}) {
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("Content-Type", "application/json");
params.put("app_id", appId);
params.put("app_key", appKey);
return params;
}
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("image", "https://s-media-cache-ak0.pinimg.com/originals/c6/c0/04/c6c004ec669d92faa36d8ff447884293.jpg");
params.put("subject_id", "12345");
params.put("gallery_name", "FirstGallery");
/*params.put("image", "\"url\":\"https://s-media-cache-ak0.pinimg.com/originals/c6/c0/04/c6c004ec669d92faa36d8ff447884293.jpg\"");
params.put("subject_id", "\"subject_id\":\"12345\"");
params.put("gallery_name", "\"gallery_name\":\"FirstGallery\""); -- i tried this too*/
return params;
}
};
requestQueue.add(stringRequest);
}
}
You aren't posting JSON.
You can either
1) Learn to use JsonObjectRequest
final JSONObject body = new JSONObject();
body.put(... , ...);
Request request = new JsonObjectRequest(url, body, ...);
2) Actually post a JSON String.
StringRequest request = new StringRequest(...) {
#Override
public byte[] getBody() throws AuthFailureError {
JSONObject params = new JSONObject();
params.put("image", "https://s-media-cache-ak0.pinimg.com/originals/c6/c0/04/c6c004ec669d92faa36d8ff447884293.jpg");
params.put("subject_id", "12345");
params.put("gallery_name", "FirstGallery");
return params.toString().getBytes();
}
#Override
public String getBodyContentType() {
return "application/json";
}
};
I am sending POST query along with String data from android device using Volley library.
The server however, is receiving only null values for the params. My code goes like this:
final String param1 = "one";
final String param2 = "124843";
final String param3 = "878942";
final String param4 = "885942";
String url = getIPAddr()+":"+getPort()+"/com.va.jersey.helloworld/hello";
RequestQueue queue = Volley.newRequestQueue(getBaseContext());
StringRequest stringRequest = new StringRequest(Request.Method.POST,url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
showOutput(response);
}
},new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
showOutput(error.toString());
}
}){
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("param1", param1);
params.put("param2", param2);
params.put("param3", param3);
params.put("param3", param4);
return params;
} //attaching POST params
};
queue.add(stringRequest);
I believe there is some error in StringRequest, please correct...
Use the code given below and let me know if you are facing any issue
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
url, null,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d(TAG, response.toString());
pDialog.hide();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
pDialog.hide();
}
}) {
/**
* Passing some request headers
* */
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json");
headers.put("apiKey", "xxxxxxxxxxxxxxx");
return headers;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq, tag_json_obj);
I'm trying to use Volley library to communicate with my RESTful API.
I have to POST string in the body, when I'm asking for the bearer Token. String should look like this:
grant_type=password&username=Alice&password=password123
And header:
Content-Type: application/x-www-form-urlencoded
More info about WebApi Individual Accounts:
http://www.asp.net/web-api/overview/security/individual-accounts-in-web-api
Unfortunately I can't figure out how can I solve it..
I'm trying something like this:
StringRequest req = new StringRequest(Request.Method.POST, URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
VolleyLog.v("Response:%n %s", response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.e("Error: ", error.getMessage());
}
}){
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("grant_type", "password");
params.put("username", "User0");
params.put("password", "Password0");
return params;
}
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/x-www-form-urlencoded");
return headers;
}
};
I'm getting 400 Bad Request all the time.
I think that I'm actually sending request like this:
grant_type:password, username:User0, password:Password0
instead of:
grant_type=password&username=Alice&password=password123
I would be very grateful if anyone has any ideas or an advice..
To send a normal POST request (no JSON) with parameters like username and password, you'd usually override getParams() and pass a Map of parameters:
public void HttpPOSTRequestWithParameters() {
RequestQueue queue = Volley.newRequestQueue(this);
String url = "http://www.somewebsite.com/login.asp";
StringRequest postRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>()
{
#Override
public void onResponse(String response) {
Log.d("Response", response);
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
Log.d("ERROR","error => "+error.toString());
}
}
) {
// this is the relevant method
#Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<String, String>();
params.put("grant_type", "password");
// volley will escape this for you
params.put("randomFieldFilledWithAwkwardCharacters", "{{%stuffToBe Escaped/");
params.put("username", "Alice");
params.put("password", "password123");
return params;
}
};
queue.add(postRequest);
}
And to send an arbitary string as POST body data in a Volley StringRequest, you override getBody()
public void HttpPOSTRequestWithArbitaryStringBody() {
RequestQueue queue = Volley.newRequestQueue(this);
String url = "http://www.somewebsite.com/login.asp";
StringRequest postRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>()
{
#Override
public void onResponse(String response) {
Log.d("Response", response);
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
Log.d("ERROR","error => "+error.toString());
}
}
) {
// this is the relevant method
#Override
public byte[] getBody() throws AuthFailureError {
String httpPostBody="grant_type=password&username=Alice&password=password123";
// usually you'd have a field with some values you'd want to escape, you need to do it yourself if overriding getBody. here's how you do it
try {
httpPostBody=httpPostBody+"&randomFieldFilledWithAwkwardCharacters="+URLEncoder.encode("{{%stuffToBe Escaped/","UTF-8");
} catch (UnsupportedEncodingException exception) {
Log.e("ERROR", "exception", exception);
// return null and don't pass any POST string if you encounter encoding error
return null;
}
return httpPostBody.getBytes();
}
};
queue.add(postRequest);
}
As an aside, Volley documentation is non-existent and quality of StackOverflow answers is pretty bad. Can't believe an answer with an example like this wasn't here already.
First thing, I advise you to see exactly what you're sending by either printing to the log or using a network sniffer like wireshark or fiddler.
How about trying to put the params in the body? If you still want a StringRequest you'll need to extend it and override the getBody() method (similarly to JsonObjectRequest)
I know this is old, but I ran into this same problem and there is a much cleaner solution imo found here: How to send a POST request using volley with string body?