android - 当我在拦截器中抛出异常时改造崩溃

Question

我有一个拦截器来处理一些身份验证的事情。如果身份验证失败，则会抛出异常。根据我能找到的抛出异常应该导致 onFailure 在我处理异常的地方被调用。不幸的是，这并没有发生，应用程序完全崩溃了。我确定我一定错过了一些东西，但我似乎无法弄清楚。希望这里有人可以提供帮助:)

下面的代码和堆栈跟踪:

val client = OkHttpClient.Builder()
     // Add interceptor that throws
     .addInterceptor { chain ->
         throw Exception("test")
     }
     .build()

retrofit = Retrofit.Builder()
                .baseUrl(baseURL)
                .client(client)
                .build()

api = retrofit.create(ApiInterface::class.java)


// Create api call...

apicall.enqueue(object : Callback<T> {
    override fun onResponse(call: Call<T>?, response: retrofit2.Response<T>?) {
        // ....
    }

    override fun onFailure(call: Call<T>?, t: Throwable?) {
        // Expect to go here to handle the Exception. But the app crashes
    }
})

堆栈跟踪:

E/AndroidRuntime: FATAL EXCEPTION: OkHttp Dispatcher
                  Process: com.testapp.test.debug, PID: 28891
                  java.lang.Error: java.lang.Exception: test
                      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1168)
                      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
                      at java.lang.Thread.run(Thread.java:764)
                   Caused by: java.lang.Exception: test
                      at com.testapp.test.data.networking.RetrofitWebApi$client$1.intercept(RetrofitWebApi.kt:90)
                      at com.testapp.test.data.networking.RetrofitWebApi$client$1.intercept(RetrofitWebApi.kt:76)
                      at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
                      at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
                      at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185)
                      at okhttp3.RealCall$AsyncCall.execute(RealCall.java:135)
                      at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
                      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
                      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
                      at java.lang.Thread.run(Thread.java:764) 

Answer 1

OkHttp 只会捕获 Interceptor 中发生的异常(如果它是 IOException)。您可以查看执行此操作的代码 here ，相关部分(简化)如下:

try {
  Response response = getResponseWithInterceptorChain();
} catch (IOException e) {
  responseCallback.onFailure(RealCall.this, e);
}

因此，如果您将代码更改为以下内容，您将按预期在 onFailure 方法中获得回调:

val client = OkHttpClient.Builder()
     // Add interceptor that throws
     .addInterceptor { chain ->
         throw IOException("test")
     }
     .build()