RxAndroid + Retrofit callTimeout 不会触发 onError

RxAndroid + Retrofit callTimeout doesn't trigger onError

我正在使用 RxAndroid + Retrofit 来发出 http 请求。代码如下所示:

Interceptor headerInterceptor = getHeaderInterceptor();
        HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();
        httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        OkHttpClient client = new OkHttpClient.Builder()
                .connectTimeout(60, TimeUnit.SECONDS)
                .writeTimeout(60, TimeUnit.SECONDS)
                .readTimeout(60, TimeUnit.SECONDS)
                .callTimeout(5, TimeUnit.SECONDS)
                .addInterceptor(headerInterceptor)
                .addInterceptor(httpLoggingInterceptor)
                .build();

        Gson gson = new GsonBuilder()
                .setLenient()
                .create();

        sRetrofit = new Retrofit.Builder()
                .baseUrl(BASE_URL)
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .addConverterFactory(GsonConverterFactory.create(gson))
                .client(client)
                .build();

这样使用:

ApiProvider.provideApi(MyApi.class)
                .submit(id, mRequest)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(
                        response -> {
                            Log.w("tag", "success");
                        },
                        throwable -> {
                            Log.w("tag", "error");
                        }
                );

我设置connectTimeout / readTimeout / writeTimeout为60秒,设置callTimeout为5秒

我知道这个配置可能不合理,但我只想在5秒后得到一个超时异常,然后Log.w("tag", "error");可以被调用。

但是,我发现我的测试永远不会调用这条线。如果我将 connectionTimeout 设置为 1 秒,那么将立即调用该行。

那我想让callTimeout触发日志错误行怎么办呢?

至于我所看到的,我认为您的问题可能不在于您为 callTimeout(5, TimeUnit.SECONDS) 设置了多少秒,我认为您的 Rx 流可能已经抛出一些错误,所以流会破坏您可以从这里得到任何回应。但是,您将时间秒数重置为 1 秒,然后重新启动应用程序,这次流不会中断并且您会收到错误消息。 如此简单,再次重新测试它以确保您的流在进入此订阅之前不会中断。

我已经用一些愚蠢的实现进行了测试:

class MainActivity : AppCompatActivity() {

    val delayInterceptor = object : Interceptor {
        override fun intercept(chain: Interceptor.Chain): okhttp3.Response {
            Thread.sleep(6000L)
            return chain.proceed(chain.request())
        }

    }
    val client: OkHttpClient = OkHttpClient.Builder()
            .connectTimeout(60, TimeUnit.SECONDS)
            .writeTimeout(60, TimeUnit.SECONDS)
            .readTimeout(60, TimeUnit.SECONDS)
            .callTimeout(5, TimeUnit.SECONDS)
            .addInterceptor(delayInterceptor)
            .build()

    val retrofit: Retrofit = Retrofit.Builder()
            .baseUrl("https://en.wikipedia.org/")
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .addConverterFactory(GsonConverterFactory.create())
            .client(client)
            .build();

    data class Wiki(
            @SerializedName("type")
            val type: String
    )

    interface WikiService {
        @GET("api/rest_v1/page/random/summary")
        fun getRandomSummary(): Single<Wiki>
    }

    @SuppressLint("CheckResult")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        retrofit.create(WikiService::class.java)
                .getRandomSummary()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe({
                    Log.d("tag", "success")
                }, {
                    Log.e("tag", "error")
                })
    }
}

终于找到原因了

我使用的是 com.jakewharton.retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory,根据其自述文件已弃用:https://github.com/JakeWharton/retrofit2-rxjava2-adapter

This is now DEPRECATED!

Retrofit 2.2 and newer have a first-party call adapter for RxJava 2: https://github.com/square/retrofit/tree/master/retrofit-adapters/rxjava2

切换到 retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory 后,一切都开始正常工作了。

顺便说一句,对于任何可能对他们两者之间的区别感兴趣的人来说?附上我在下面找到的关键信息: