場景： 我需要在nodejs中調(diào)用一個處理時間較長的接口嗎，可能會超過120s。

  nodejs 默認(rèn)的 http 請求超時時間超過120s,則會返回超時。

問題：

如何修改默認(rèn)的超時時間呢？
最好是針對某個請求修改，不要影響到其他請求。

Koa示例：

// 這里虛擬一個處理時間較長的 接口
    const timeoutService = function (time) {
    time = time || 5000
    return new Promise((resolve, reject) => {
        try {
            setTimeout(function () {
                let data = [{
                                name: 'Tommy',
                                age: 10
                            }, {
                                name: 'Jupiter',
                                age: 18
                            }];
                resolve(data)
            }, time)
        } catch (e) {
            reject(e)
        }
    }).then(res => {
        return res
    }).catch(e => {
        return e
    })
}

router.get('/list', async (ctx) => {
    // 設(shè)置處理過程超過120s
    let data = await timeoutService(121000)
    ctx.status = 200;
    ctx.body = {
        success: true,
        data: data
    };
});

使用nodejs調(diào)用

// nodejs 調(diào)用
const GetList = (data) => {
  return new Promise((resolve, reject) => {
    let bs = JSON.stringify(data)
    console.log(bs)
    let encode = new Buffer(bs).toString('base64')
    let postData = JSON.stringify({ data: encode})
    var opt = {
        method: 'GET',
        host: 'localhost',
        port: 3100,
        path: '/list',
        headers: {
            'Content-Type': 'application/json',
            'Content-Length': Buffer.byteLength(postData),
            'Accept': 'application/json; charset=utf-8'
        }
    }
    let req = http.request(opt)
    req.on('response', (res) => {
        console.log('狀態(tài)碼:' + res.statusCode)
        console.log('響應(yīng)頭: ' + JSON.stringify(res.headers))
        let body = ''
        res.on('data', (data) => {
          body += data
        })
        res.on('end', () => {
          resolve(body)
        })
    })

    req.on('error', (e) => {
      console.log(e)
      console.error('請求遇到問題:' + e.message)
      reject(e.message)
    })
    req.setNoDelay(0)
    req.write(postData)
    req.end()
  })
}

function getTimeLast(label, startTime) {
    let finishTime = Date.now()
    let last = (finishTime - startTime) / 1000
    console.log(`${label} ${last}`)
}

let startTime = Date.now()
GetList({a: 1}).then(res => {
    console.log(res)
    getTimeLast('成功返回用時：', startTime)
}).catch(e => {
    console.log(e)
    getTimeLast('失敗返回用時：', startTime)
}) 

結(jié)果返回如下：

{"a":1}
{ Error: socket hang up
    at createHangUpError (_http_client.js:331:15)
    at Socket.socketOnEnd (_http_client.js:423:23)
    at emitNone (events.js:111:20)
    at Socket.emit (events.js:208:7)
    at endReadableNT (_stream_readable.js:1055:12)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)
    at process._tickCallback (internal/process/next_tick.js:180:9) code: 'ECONNRESET' }
請求遇到問題:socket hang up
socket hang up
失敗返回用時： 120.018