Getting json from retrofit's response errorBody

Question

I am struggling with retrofit. When I post a request in my browser i get such a request:

And that's what I expect. However, when I try to parse this in my app I kept getting responses as in this thread. I've found tried to implement this solution, but my errorBody does not even resemble the answer from my browser: How can I get this JSON?

Just in case this is my response handler code:

void handleResponse(Response response){
    TextView textView = (TextView)findViewById(R.id.empty_list_tv);
    if(response.isSuccessful())
        textView.setText(response.toString());
    else {
        Gson gson = new Gson();
        ErrorResponse errorResponse = gson.fromJson(
                response.errorBody().toString(),
                ErrorResponse.class);
        textView.setText(response.errorBody().toString());
    }
}

And my ErrorResponse:

public class ErrorResponse {
    @SerializedName("message")
    private String message;
    @SerializedName("error")
    private Error error;

    public String getMessage() {
        return message;
    }

    public Error getError() {
        return error;
    }
}

No. At least I don't recognize it is: "okhttp3.ResponseBody$1@f0473b9" — gonczor, Mar 06 '17 at 16:09
You are trying to construct `errorResponse` from GSON's fromJson which expects a JSON. Do you see where you are doing wrong? — Coder, Mar 06 '17 at 16:11
Ah. That's what you mean. I see I've used `toString()` instead of `string()`. When I evaluate `response.errorBody().string()` I get `{"error":{"message":"Not Found","error":{"status":404}}}` which is what I want. I'll post your answer to mark problem as solved. Thanks :) — gonczor, Mar 06 '17 at 16:17

score 39 · Accepted Answer · edited Jan 10 '18 at 13:45

39

You are using toString() in GSON's fromJson which is not a JSON content. Replace your toString() as string() which will give you the JSON body. Also make sure to use the string() method only once and save the response in a variable, because it will return empty string if you used it again.

edited Jan 10 '18 at 13:45

Khalid Taha

3,183
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answered Mar 06 '17 at 16:26

Coder

2,153
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1

this worked, but if I called the `string()` method second time it will return empty string – Khalid Taha Dec 20 '17 at 10:36
1

@KhalidTaha What do you exactly mean when you say you are calling the method second time? Can you elaborate a bit – Coder Jan 08 '18 at 20:50
I mean if you call `string()` method for the first time it will return the correct string, but if you called it another once, it will return empty string. – Khalid Taha Jan 09 '18 at 13:59
2

Care to elaborate or update my answer with valid explanation for that? It might help someone else looking for the answer @KhalidTaha – Coder Jan 09 '18 at 17:50
Thanks for the answer. using ```string()``` works but I had to surround it in a try catch. – Denny Nov 12 '20 at 00:12
If you need to use response.errorBody().string() more than once, check this answer out: https://stackoverflow.com/a/73857446/9952567 – Vladimir Kattsyn Sep 26 '22 at 17:42

score 9 · Answer 2 · answered Aug 18 '20 at 09:54

you use string(), not toString()

 ErrorResponse errorResponse = gson.fromJson(
                response.errorBody().toString(),
                ErrorResponse.class);

to

ErrorResponse errorResponse = gson.fromJson(
                response.errorBody().string(),
                ErrorResponse.class);

score 0 · Answer 3 · answered Dec 17 '22 at 16:16

0

In Kotlin

Parse the error body

val errorResponse = Gson().fromJson(response.errorBody()?.charStream(),ErrorResponse::class.java)

answered Dec 17 '22 at 16:16

Eldhopj

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Getting json from retrofit's response errorBody

3 Answers3

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