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I am trying to send a hashmap to the server. I am able to PUT the contents of the hashmap from Postman but I am unable to do the same from my android project. The callback first executes Onfailure. On second attempt to send the same data, I get a 409 conflict response.

The stacktrace of the failure:

08-21 14:42:19.748 9876-9876/com.example.vishwa.postingdata W/System.err: java.io.EOFException: End of input at line 1 column 1 path $ 08-21 14:42:19.750 9876-9876/com.example.vishwa.postingdata W/System.err: at com.google.gson.stream.JsonReader.nextNonWhitespace(JsonReader.java:1401) at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:549) at com.google.gson.stream.JsonReader.peek(JsonReader.java:425) at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:161) at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:145) 08-21 14:42:19.751 9876-9876/com.example.vishwa.postingdata W/System.err: at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:37) at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:25) at retrofit2.ServiceMethod.toResponse(ServiceMethod.java:119) at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:218) 08-21 14:42:19.752 9876-9876/com.example.vishwa.postingdata W/System.err: at retrofit2.OkHttpCall$1.onResponse(OkHttpCall.java:112) at okhttp3.RealCall$AsyncCall.execute(RealCall.java:141) at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) at java.lang.Thread.run(Thread.java:818)

The interface:

public interface APIService { @POST("/posts") @FormUrlEncoded rx.Observable<Post> savePost(@Field("id") long id, @Field("title") String title, @Field("author") String author); @PUT("/posts/{id}") @FormUrlEncoded Call<Post> updatePost(@Path("id") long id, @Field("title") String title, @Field("author") String author); @DELETE("/posts/{id}") Call<Post> deletePost(@Path("id") long id); @PUT("authenticate/create") Call<HashMap<String,String>> signUpParent(@Body HashMap<String,String> hashMap); }

The function to post:

private void PostData(HashMap<String, String> hashMap) { Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://coreapi.xxxxx.org:8080/v1/") .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .build(); APIService apiService =retrofit.create(APIService.class); apiService.signUpParent(hashMap).enqueue(new retrofit2.Callback<HashMap<String, String>>() { @Override public void onResponse(retrofit2.Call<HashMap<String, String>> call, Response<HashMap<String, String>> response) { Integer code=response.code(); Toast.makeText(getBaseContext(),"checking the response : "+code,Toast.LENGTH_LONG).show(); Log.i("success", "post submitted to API imaginators: "); } @Override public void onFailure(retrofit2.Call<HashMap<String, String>> call, Throwable t) { Log.e("failure", "Unable to submit post to API imaginators."); t.printStackTrace(); } }); }

The request body given in the postman:

{ "clientid":"##########", "email":"IAzMzkaksB8KGT2SLJsol7Xr9Phts/G8", "first_name":"Eswar", "last_name":"", "password":"Dt9keQfZMUY=", "security_answer":"", "security_question":"", "account_type":"learning_pod_app" }

I have found some solutions from these links: one, two, three... But they don't work.

Any help is appreciated.

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  • I think you are sending JSON data, So you need to accept and return JSON from the API as well Commented Aug 21, 2018 at 9:26
  • Use logcat to show JSON response from the server. Commented Aug 21, 2018 at 9:27
  • @sontruongit The code directly executes onfailure, so I am not able to see response in the first attempt itself. In the second it gives, 409 response and the response.body() gives null. Commented Aug 21, 2018 at 9:34
  • 1
    put all your params of requestbody in a pojo class and then send to the server in place of hashmap Commented Aug 21, 2018 at 9:54

2 Answers 2

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2

in onFailure method, capture Throweble with Log.e("failure", t.toString());

Then you can find the exact problem with the respond.

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1

Change your method signature to:

@Headers("Content-Type: application/json") @PUT("authenticate/create") Call<HashMap<String,String>> signUpParent(@Body HashMap<String, String> hashMap);

If the response is empty you can use.

@Headers("Content-Type: application/json") @PUT("authenticate/create") Call<ResponseBody> signUpParent(@Body HashMap<String, String> hashMap);

And give it a try.

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5 Comments

I get this error after trying this approach: "@FieldMap parameters can only be used with form encoding. (parameter #1)". Even with the encoding, I get a 400 response.
Can you capture a screenshot of the request in Postman with body tab highlighted?
In Postman, I get a 200 response code but the body doesn't show anything.
I mean request body not response, before you hit Send button.
Thank you the second one worked, using the responsebody.

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