Renier Renier - 2 months ago 19
Android Question

How to get malformed JSON in Retrofit 2

I am sending a request, but I am getting an exception, even though the request is successful(The API I am interacting with, sends an OTP on success).

The exception is:

com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 2 path $
at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1573)
at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1423)
at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:575)
at com.google.gson.stream.JsonReader.peek(JsonReader.java:429)
at com.google.gson.internal.bind.TypeAdapters$13.read(TypeAdapters.java:349)
at com.google.gson.internal.bind.TypeAdapters$13.read(TypeAdapters.java:346)
at com.google.gson.TypeAdapter.fromJson(TypeAdapter.java:256)
at retrofit.GsonConverter.fromBody(GsonConverter.java:42)
at retrofit.OkHttpCall.parseResponse(OkHttpCall.java:144)
at retrofit.OkHttpCall.access$000(OkHttpCall.java:25)
at retrofit.OkHttpCall$1.onResponse(OkHttpCall.java:90)
at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:168)
at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:856)


Now how would I see that malformed JSON? In order to know if what Json object is malformed, if it is the object being returned(which I am expecting to be a string) , or is it the object That I am sending.

Forgive me if this is a trivial question, I only started with Android development, as of this week.

Here is the service:

public static EnrollmentApiInterface getApiClient(){
if (EnrollmentRequest == null) {
OkHttpClient client = new OkHttpClient();
client.interceptors().add(new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Response response = chain.proceed(chain.request());

Request request = chain.request();
Buffer buffer = new Buffer();
request.body().writeTo(buffer);
String body = buffer.readUtf8();
Log.println(10, TAG, body);
Log.i(TAG, "hello: " + response);

String bodyString = response.body().string();
Log.i(TAG, bodyString);
response = response.newBuilder()
.body(ResponseBody.create(response.body().contentType(), bodyString))
.build();
return response;
}
});

Gson gson = new GsonBuilder()
.setDateFormat("yyyy-MM-dd'T'HH:mm:ssZ")
.create();

Retrofit retrofit = new Retrofit.Builder()
// .baseUrl("http://10.0.2.2:6543/") // On AVD
.baseUrl("http://192.168.0.106:6543") // On device
.addConverterFactory(GsonConverterFactory.create(gson))
.build();

EnrollmentRequest = retrofit.create(EnrollmentApiInterface.class);
}
return EnrollmentRequest;
}


Interface:

public interface EnrollmentApiInterface {

@Headers({
"Accept: application/json",
"Content-Type: application/json"
})
@POST("auth/enroll")
Call<String> RequestEnrollment(@Body JsonObject EnrollmentDetails);

@Headers({
"Accept: application/json",
"Content-Type: application/json"
})
@POST("auth/enroll/auth")
Call<String> AuthoriseEnrollment(@Body JsonObject LoginDetails);


}
}


and here is the call:

EnrollmentRequest request = new EnrollmentRequest();
request.setMsisdn(MsisdnTxt.getText().toString());
request.setId_number(IdNumberTxt.getText().toString());
EnrollmentApiClient.EnrollmentApiInterface service = EnrollmentApiClient.getApiClient();
Log.i(TAG, "REQUEST: " + request.toJson());
Call<String> call = service.RequestEnrollment(request.toJson());
call.enqueue(new Callback<String>() {
@Override
public void onResponse(Response<String> response) {
Log.i(TAG, "ON RESPONSE" + response);
Log.i(TAG, "ON RESPONSE BODY" + response.body());
// Create object of SharedPreferences.
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(that);
//now get Editor
SharedPreferences.Editor editor = sharedPref.edit();
//put your value
editor.putString("IDnumber", IdNumberTxt.getText().toString());
editor.putString("Msisdn", MsisdnTxt.getText().toString());

//commits your edits
editor.commit();
Log.i(TAG, "onClick-AFTER");
Intent intent = new Intent(getApplicationContext(), AuthoriseActivity.class);
startActivity(intent);

}

@Override
public void onFailure(Throwable t) {
// It always comes in here
Log.i(TAG, "NOTHERE", t);
Log.d("CallBack", " Throwable is " + t.toString());

Toast.makeText(EnrollActivity.this, "Request Failed", Toast.LENGTH_LONG).show();
}

});

Answer

Just log your network responses, so you will see what's wrong.

@Override
public Response intercept(Chain chain) throws IOException {
    Response response = chain.proceed(chain.request());
    Log.w("Retrofit@Response", response.body().string());
    return response;
}