Kotlin协同程序和SecurityException

Question

我正在使用Retrofit的coroutines适配器，我看到，如果网络调用失败，因为URL不正确，try / catch块将捕获它，但如果我删除Internet权限以便我们获得SecurityException，则应用程序崩溃。

这是处理改造响应的代码：

override suspend fun execute(): Result<IpAddress> = try {
    val result = dataRepository.getIpAddress().await()
    Result.Success(result)
} catch (throwable: Throwable) {
    if (throwable is JobCancellationException) {
        throw throwable
    }
    Result.Error(throwable)
}

存储库很简单

override suspend fun getIpAddress(): Deferred<IpAddress> = dataService.getIpAddress()

同

interface DataService {
    @GET("/?format=json")
    fun getIpAddress(): Deferred<IpAddress>
}

为什么像UnknownHostException这样的异常会被捕获但是SecurityException会使应用程序崩溃？

这是崩溃日志

09-09 12:27:25.467 12465 12495 E AndroidRuntime: FATAL EXCEPTION: OkHttp Dispatcher
09-09 12:27:25.467 12465 12495 E AndroidRuntime: Process: com.example.coroutines, PID: 12465
09-09 12:27:25.467 12465 12495 E AndroidRuntime: java.lang.SecurityException: Permission denied (missing INTERNET permission?)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:151)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:105)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at java.net.InetAddress.getAllByName(InetAddress.java:1154)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.Dns$1.lookup(Dns.java:40)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:185)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:149)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:84)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:214)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:135)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:114)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:126)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.RealCall$AsyncCall.execute(RealCall.java:147)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at java.lang.Thread.run(Thread.java:764)
09-09 12:27:25.467 12465 12495 E AndroidRuntime: Caused by: android.system.GaiException: android_getaddrinfo failed: EAI_NODATA (No address associated with hostname)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at libcore.io.Linux.android_getaddrinfo(Native Method)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at libcore.io.BlockGuardOs.android_getaddrinfo(BlockGuardOs.java:172)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:137)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    ... 26 more
09-09 12:27:25.467 12465 12495 E AndroidRuntime: Caused by: android.system.ErrnoException: android_getaddrinfo failed: EACCES (Permission denied)
09-09 12:27:25.467 12465 12495 E AndroidRuntime:    ... 29 more

Answer 1

因为在一种情况下，Retrofit会在内部捕获它并将其作为错误传回，知道您可能希望处理它。在另一种情况下，它不会捕获它，它会崩溃应用程序。没有办法改变这种在他们的内部线程上发生的分支Retrofit的缺点，只是保留互联网权限。