OkHttp3 SocketTimeoutException (in Android app) -- 如何设置异步请求的读取超时时间？

Question

我在尝试 OkHttp3 异步获取时不断收到 java.net.SocketTimeoutException。这表明我没有将读取超时值设置得足够高（我认为默认值为 10 秒）。

更大的问题是 "How to prevent this exception?" 但是，除非有人有更好的初始策略，否则我的直接问题是 "How to set a read timeout value for the request?"

在我的代码中，我使用了来自 Okttp 食谱页面的信息 here

注意我的 try-catch 的前两行被注释掉了。那是因为我无法使用我需要的那种构建器（能够设置超时值，OkHttpClient.Builder）来添加 header 信息 (Request.Builder) .

我的代码如下所示：

    m_client = new OkHttpClient();


    try
    {
        //OkHttpClient.Builder bldr = m_client.newBuilder();
        //bldr.readTimeout(0, TimeUnit.SECONDS);

        Request.Builder reqBuilder = new Request.Builder();

        reqBuilder.addHeader("authorization", getToken());

        Request request = reqBuilder.url("http://plusdev.kooklah.com/api/v2_1/items/get").build();

        m_client.newCall(request).enqueue(new Callback()
        {
            @Override
            public void onFailure(Call call, IOException e)
            {
                Log.i("Logit", "Inside onFailure() -- IOException: " + e.getMessage() + " ----- stack trace: " + UtilGen.exceptionToString(e));

                runOnUiThread(new Runnable()
                {
                    @Override
                    public void run()
                    {
                       // do stuff on UI thread
                    }
                });
            }

            @Override
            public void onResponse(Call call, final Response responseIn)
            {
                try
                {
                    m_sServerResponse = responseIn.body().string();
                }
                catch (Exception ex)
                {
                    Log.i("LogIt", "          ---Inside onResponse() -- Exception occurred. ex: " + ex.toString());
                }

                runOnUiThread(new Runnable()
                {
                    @Override
                    public void run()
                    {
                        Log.i("LogIt", "          ---Inside onResponse() -- inside run().");
                        if (!m_sServerResponse.isEmpty())
                        {
                            Log.i("LogIt", "          ---Inside onResponse() -- inside run() -- Success");
                            processDownloadedAssessments(m_sServerResponse);
                        }
                    }
                });
            }
        });
    }
    catch (Exception ex)
    {
        Log.i("LogIt", "ex: " + ex.getMessage());
    }

我在 okhttp github 站点上发现了一个似乎直接相关的已报告问题 here。甚至还有一个设置读取超时的建议，如上所述，它已被注释掉，因为我不知道如何让那种构建器承担 Recipe 页面上描述的异步请求。

我的异常的堆栈跟踪如下，但请注意，大多数时候我没有得到异常。堆栈跟踪：

01-19 14:04:52.192: I/LogIt(25650): Inside onFailure() -- IOException: null ----- stack trace: java.net.SocketTimeoutException
01-19 14:04:52.192: I/LogIt(25650):     at java.net.PlainSocketImpl.read(PlainSocketImpl.java:488)
01-19 14:04:52.192: I/LogIt(25650):     at java.net.PlainSocketImpl.access[=12=]0(PlainSocketImpl.java:37)
01-19 14:04:52.192: I/LogIt(25650):     at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:237)
01-19 14:04:52.192: I/LogIt(25650):     at okio.Okio.read(Okio.java:138)
01-19 14:04:52.192: I/LogIt(25650):     at okio.AsyncTimeout.read(AsyncTimeout.java:236)
01-19 14:04:52.192: I/LogIt(25650):     at okio.RealBufferedSource.indexOf(RealBufferedSource.java:325)
01-19 14:04:52.192: I/LogIt(25650):     at okio.RealBufferedSource.indexOf(RealBufferedSource.java:314)
01-19 14:04:52.192: I/LogIt(25650):     at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:210)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http1.Http1Codec.readResponse(Http1Codec.java:191)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http1.Http1Codec.readResponseHeaders(Http1Codec.java:132)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:54)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:179)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.RealCall$AsyncCall.execute(RealCall.java:129)
01-19 14:04:52.192: I/LogIt(25650):     at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
01-19 14:04:52.192: I/LogIt(25650):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
01-19 14:04:52.192: I/LogIt(25650):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
01-19 14:04:52.192: I/LogIt(25650):     at java.lang.Thread.run(Thread.java:818)

Answer 1

而不是

m_client = new OkHttpClient();

您应该使用如下构建器创建客户端：

m_client = new OkHttpClient.Builder()
        .connectTimeout(10, TimeUnit.SECONDS)
        .writeTimeout(10, TimeUnit.SECONDS)
        .readTimeout(30, TimeUnit.SECONDS)
        .build();

当您像这样创建客户端时，每个 Request 执行此客户端（使用 m_client.newCall(...)）将使用构建器中指定的超时。

OkHttp3 SocketTimeoutException (in Android app) -- 如何设置异步请求的读取超时时间？

OkHttp3 SocketTimeoutException (in Android app) -- How to set read timeout for asynchronous request?

java

android

asynchronous

okhttp3

socket-timeout-exception