Firebase的Retrofit2身份验证密钥

Question

I need to use the retrofit for consuming firebase json with authentication. I use code by https://futurestud.io/tutorials/retrofit-2-manage-request-headers-in-okhttp-interceptor

OkHttpClient.Builder httpClient = new OkHttpClient.Builder();  
httpClient.addInterceptor(new Interceptor() {  
@Override
public Response intercept(Interceptor.Chain chain) throws IOException {
    Request original = chain.request();

    // Request customization: add request headers
    Request.Builder requestBuilder = original.newBuilder()
            .header("Authorization", "auth-value"); // <-- this is the important line

    Request request = requestBuilder.build();
    return chain.proceed(request);
}
});

OkHttpClient client = httpClient.build(); 

For sure. What auth-value key from firebase console do i use please ?

Answer 1

As per official firebase doc :

To retrieve an access token you need to use a service account. Please see the guide for using Google Service Accounts. You can create a service account credential in your Firebase project from the Service Accounts section of the Firebase console.

GoogleCredential googleCred = GoogleCredential.fromStream(new FileInputStream("service_account.json"));
GoogleCredential scoped = googleCred.createScoped(
    Arrays.asList(
      "https://www.googleapis.com/auth/firebase.database",
      "https://www.googleapis.com/auth/userinfo.email"
    )
);
scoped.refreshToken();
String token = scoped.getAccessToken();

Using the access token

The Database REST API accepts access_token= on the query string or header Authorization: Bearer to authenticate a request with a service account.