Okhttp超时时间设置和相关问题解决

okhttp超时相关问题

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• 设置了超时时间，但是超时时间还是很长，因为在DNS异常处理时花费了大量时间，我们需要给DNS解析设置超时时间
• UnknownHostException异常处理
• 日志拦截器打印请求和回传消息

超时时间设置

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//okhttp3超时时间设置
mOkHttpClient = OkHttpClient.Builder()
                    .retryOnConnectionFailure(false)//取消重试
                    .addInterceptor(OkHttpLogInterceptor())//日志拦截器
                    .dns(OkHttpDns(3L))
                    .connectTimeout(CONNECT_TIMEOUT, TimeUnit.SECONDS)//设置连接超时时间
                    .readTimeout(READ_TIMEOUT, TimeUnit.SECONDS)
                    .writeTimeout(WRITE_TIMEOUT, TimeUnit.SECONDS)
                    .build()

日志拦截器

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import com.tencent.wecast.utils.Logger
import java.io.IOException
import java.nio.charset.Charset
import java.nio.charset.UnsupportedCharsetException
import java.util.concurrent.TimeUnit
import okhttp3.Interceptor
import okhttp3.Response
import okio.Buffer


/**
 * okhttp 拦截器
 */

class OkHttpLogInterceptor : Interceptor {
    companion object {
        private const val TAG = "OkHttpLogInterceptor"
        private val UTF8 = Charset.forName("UTF-8")
    }


    @Throws(IOException::class)
    override fun intercept(chain: Interceptor.Chain): Response {
        val request = chain.request()
        val requestBody = request.body
        var body: String? = null
        if (requestBody != null) {
            val buffer = Buffer()
            requestBody.writeTo(buffer)
            var charset: Charset? = UTF8
            val contentType = requestBody.contentType()
            if (contentType != null) {
                charset = contentType.charset(UTF8)
            }
            body = buffer.readString(charset!!)
        }

        Logger.t(TAG).d(
                "Send: method：" + request.method
                        + "\nurl：" + request.url
                        + "\nHeader：" + request.headers
                        + "\nParams: " + body)

        val startNs = System.nanoTime()
        val response = chain.proceed(request)
        val tookMs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs)

        val responseBody = response.body
        val rBody: String

        val source = responseBody!!.source()
        source.request(java.lang.Long.MAX_VALUE)
        val buffer = source.buffer()

        var charset: Charset? = UTF8
        val contentType = responseBody.contentType()
        if (contentType != null) {
            try {
                charset = contentType.charset(UTF8)
            } catch (e: UnsupportedCharsetException) {
                e.printStackTrace()
            }

        }
        rBody = buffer.clone().readString(charset!!)

        Logger.t(TAG).d(
                ("Receiver: code:" + response.code
                        + "\nurl：" + response.request.url
                        + "\nbody：" + body
                        + "\nResponse: " + rBody))

        return response
    }
}

java.net.UnknownHostException异常

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解决办法：（1）添加以下网络相关权限 （2）设置DNS解析异常处理

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET" />

DNS解析异常拦截

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import okhttp3.Dns
import java.net.InetAddress
import java.net.UnknownHostException
import java.util.concurrent.Callable
import java.util.concurrent.FutureTask
import java.util.concurrent.TimeUnit

class OkHttpDns constructor(private val timeout:Long):Dns {

    override fun lookup(hostname: String): List<InetAddress> {
        return if (hostname == null) {
            throw UnknownHostException("hostname == null")
        } else {
            try {
                val task = FutureTask(
                        Callable { listOf(*InetAddress.getAllByName(hostname)) })
                Thread(task).start()
                task.get(timeout, TimeUnit.SECONDS)
            } catch (var4: Exception) {
                val unknownHostException = UnknownHostException("Broken system behaviour for dns lookup of $hostname")
                unknownHostException.initCause(var4)
                throw unknownHostException
            }

        }
    }
}