使用拦截器获取refreshtoken后如何调用相同的请求？

Question

我正在创建使用改造的 android 应用程序。我用spring作为rest api。我已经使用 JWT 进行身份验证。我在这里使用了两个拦截器RequestInterceptor 和ResponseInterceptor。使用 expire JWT 调用BASE_URL/hello api 的场景如下

1. 客户端调用 /hello 使用 RequestInterceptor 标头中的过期访问令牌

2. 服务器检查令牌和响应代码为 401/403

3. 客户端检查响应代码并使用 ResponseInterceptor 调用 /refresh，并在 header 中使用 refreshtoken

4. 服务器检查刷新令牌并使用新的访问令牌响应

现在的问题是如何再次调用 /hello。对于每个请求，我都想要这个。我如何预测最后发出的请求。

代码如下：

调用 /hello 的部分代码

btnNext.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {


                Call<HelloResponse> call= RetrofitFactoryWithJwt.getRetrofitInstance(getApplicationContext()).helloUser();

                call.enqueue(new Callback<HelloResponse>() {
                    @Override
                    public void onResponse(Call<HelloResponse> call, Response<HelloResponse> response) {
                        Log.d(TAG,"after call in enque");
                        if(response.code()==200)
                        {
                            Log.d(TAG,response.body().getSuccess());
                        }
                        else
                        {
                            Log.d(TAG,"problem in response:"+response.code());

                        }
                    }

                    @Override
                    public void onFailure(Call<HelloResponse> call, Throwable t) {
                        Log.d(TAG,"onfailure"+t.getMessage());
                    }
                });

                Intent intent = new Intent( getApplicationContext(), MainActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
                startActivity(intent);
            }
        });

RequestInterceptor.java

public class RequestInterceptor implements Interceptor {


   Context context;
  String TAG="heyrequest";

    public RequestInterceptor(Context context)
    {
        this.context=context;
    }
    @Override
    public Response intercept(Chain chain) throws IOException {

        Request originalRequest = chain.request();

        //if url is /refresh add refresh token in header instead of accesstoken
        if(originalRequest.url().encodedPath().equalsIgnoreCase("/refresh"))
        {

            SharedPreferences preferences = context.getSharedPreferences("tokens", MODE_PRIVATE);
            String refreshvalue=preferences.getString("refreshtoken","");


            // rewrite the request
            Request newRequest=originalRequest.newBuilder()
                    .addHeader("Authorization","Bearer "+refreshvalue)
                    .build();

            return chain.proceed(newRequest);
        }

      //for context we have use requestinterceptor context construction

        SharedPreferences preferences = context.getSharedPreferences("tokens", MODE_PRIVATE);
        String tokenvalue=preferences.getString("accesstoken","");

        // rewrite the request
        Request newRequest=originalRequest.newBuilder()
                            .addHeader("Authorization","Bearer "+tokenvalue)
                            .build();

        return chain.proceed(newRequest);
    }
}

ResponseInterceptor.java

public class ResponseInterceptor implements Interceptor {

    Context context;
    String TAG="heyresponse";
    String accesstoken=null;
    Response response=null;
    public ResponseInterceptor(Context context)
    {
       this.context=context;
    }

    @Override
    public Response intercept(final Chain chain) throws IOException {

         final Request request=chain.request();
         response = chain.proceed(request);
        if(response.code()==401 || response.code()==403)
        {
           accesstoken=getNewToken();
        }
        return chain.proceed(request);
    }

    public String getNewToken()
    {

        Call<RefreshResponse> call= RetrofitFactoryWithJwt.getRetrofitInstance(context).refreshToken();

        call.enqueue(new Callback<RefreshResponse>() {
            @Override
            public void onResponse(Call<RefreshResponse> call, retrofit2.Response<RefreshResponse> response1) {
                Log.d(TAG,"in refreshtoken call");
                if(response1.code()==200)
                {

                    accesstoken=response1.body().getAccesstoken();
                    Log.d(TAG,accesstoken);

                    SharedPreferences preferences = context.getSharedPreferences("tokens", MODE_PRIVATE);
                    preferences.edit().putString("accesstoken", accesstoken).apply();

                }
                else
                {
                    Log.d(TAG,"problem in response:"+response1.code());
                }
            }

            @Override
            public void onFailure(Call<RefreshResponse> call, Throwable t) {
                Log.d(TAG,"onfailure:"+t.getMessage());
            }
        });

return  accesstoken;
    }

}

Answer 1

我通过使用验证器处理响应和拦截器在请求中添加标头解决了这个问题