Reputation: 483
Using Retrofit 1.6.0, OkHTTP 2.0.0, and OkHTTP-UrlConnection 2.0.0.
I am doing a POST to a service using Retrofit to a URL that does not exist. The failure callback is called, as expected. However, the RetrofitError parameter does not have a response. I would really like to grab the HTTP status code that was returned by using
error.getResponse().getStatus()
but since getResponse() returns null, I can't.
Why is getResponse() null and how can I get the status?
Thanks.
Also, the error I am receiving is UnknownHostException, as expected. Repeat: I am expecting this error. I want to know how to get the HTTP status code or why error.getResponse() returns null.
Edit: Here's some code:
RestAdapterBuilderClass.java
RestAdapter restAdapter = new RestAdapter.Builder()
.setEndpoint("http://badURL.DoesntMatter/");
.setRequestInterceptor(sRequestInterceptor)
.setLogLevel(RestAdapter.LogLevel.FULL)
.build();
sService = restAdapter.create(ServiceInterface.class);
ServiceInterface.java
@POST("/Login")
void login(@Body JsonObject body, Callback<String> callback);
CallbackClass.java
@Override
public void failure(RetrofitError error) {
if (error.getResponse() == null) {
// error.getResponse() is null when I need to get the status code
// from it.
return;
}
}
Upvotes: 16
Views: 15003
Reputation: 1116
Just to expand on @lyio's answer, I found from Fabric logging that getKind() sometimes returns UNEXPECTED and then if you parse the message you get timeouts and connection issues so I wrote the utility class below.
public class NetworkUtils {
// Compiled from Fabric events
private static final List<String> networkErrorStrings = new ArrayList<>(Arrays.asList(
"Unable to resolve host",
"Connection closed by peer",
"Failed to connect",
"timeout",
"Connection timed out"));
public static boolean isNetworkError(@Nullable RetrofitError retrofitError) {
if (retrofitError != null) {
if (retrofitError.getKind() != RetrofitError.Kind.NETWORK) {
for (String error : networkErrorStrings) {
if (retrofitError.getMessage().contains(error)) {
return true;
}
}
} else {
return true;
}
}
return false;
}
}
Upvotes: 1
Reputation: 969
I am using Retrofit 2. When endpoint url end with "/" as in your case and again in your interface it starts with "/" [@POST("/Login")] causes this problem. Remove the "/" from .setEndpoint() method
Upvotes: 0
Reputation: 7482
RetrofitError
has a method called isNetworkError()
that you can use to detect a failed request due to network problems. I usually add a small helper method like this:
public int getStatusCode(RetrofitError error) {
if (error.isNetworkError()) {
return 503; // Use another code if you'd prefer
}
return error.getResponse().getStatus();
}
and then use that result to handle any additional failure logic (logout on 401, display error message on 500, etc).
Upvotes: 7
Reputation: 1427
When you get an UnknownHostException it means, that you were not able to establish a connection to the server. You cannot, in fact, expect a HTTP status in that case.
Naturally you only get a Http response (and with that a status) when you can connect to a server.
Even when you get a 404 status code, you made a connection to the server. That is not the same as a UnknownHostException.
The getResponse() can return null if you didn't get a response.
Upvotes: 10