每个路由的节点Express特定超时值

问题描述

我正在使用Express v4.13.4开发Node v4.2.4应用程序.现在，我想增加特定上传路由的超时时间.

I'm developing a Node v4.2.4 application using Express v4.13.4. Now I would like to increase the timeout time for a specific upload route.

根据我所阅读和经历的内容:

From what I've read and experienced:

• 默认的节点服务器超时为2分钟
• 默认情况下，节点套接字没有超时
• Express中有中间件来处理超时

• the default Node server timeout is 2 minutes
• a Node socket has no timeout by default
• there's middleware from Express to handle timeouts

但是，当我尝试为上传路由实现 connect-timeout 中间件时，我迷失了.

However, I'm lost when trying to implement the connect-timeout middleware for the upload route.

应用程序设置

const app = express();
app.use(cors());
app.use(bodyParser.json({ limit: '50mb' }));
app.use(bodyParser.urlencoded({ limit: '50mb', extended: false }));
app.use(passport.initialize());

app.use('/uploads', uploadRoutes);
app.use(errorHandler);

function errorHandler(err, req, res, next) {
  if (err.code && err.code === 'ETIMEDOUT') {
    if (!res.headersSent) {
      res
        .status(408)
        .send({
          success: true,
          message: 'Timeout error'
        });
    }
  }

  next(err);
}

const server = app.listen(config.port);

上传路线定义

router.route('/:uploadId/upload-files')
  .post(timeout('3m'),
    require('./actions/upload-files').prepareHandler,
    require('./actions/upload-files').uploadHandler(),
    require('./actions/upload-files').responseHandler);

但是，当我上传文件时，仅在命令行控制台上3分钟后，我确实从express-timeout看到了错误.该请求仍在进行中，没有返回状态码408.

However, when uploading the files I do see the error from express-timeout after 3 minutes ONLY in the command line's console. The request is still in progress and no status code of 408 is returned.

4分钟后，我终于看到408状态和超时错误"作为响应对象的一部分.

After 4 minutes I finally see the 408 status and 'Timeout error' as part of the response object.

对于其他路线的请求，我在4分钟后收到net::ERR_EMPTY_RESPONSE错误.

For requests to other routes I get the net::ERR_EMPTY_RESPONSE error after 4 minutes.

如果我记录server.timeout的值，则该值为120000(2分钟).

If I log the value for server.timeout, the value is 120000 (2 minutes).

我的问题

• 4分钟可能从哪里来?是因为可能有一个先前的OPTIONS请求吗?
• 服务器和服务器之间有什么区别?套接字超时以及如何为特定路由正确设置它们?

推荐答案

我已使用以下路由配置解决了该问题:

I've solved it using the following route configuration:

'use strict';

const ms = require('ms');
const express = require('express');
const router = express.Router();

router.route('/upload-files')
  .post(
    setConnectionTimeout('12h'),
    require('./actions/upload-files').responseHandler
  );

function setConnectionTimeout(time) {
  var delay = typeof time === 'string'
    ? ms(time)
    : Number(time || 5000);

  return function (req, res, next) {
    res.connection.setTimeout(delay);
    next();
  }
}

exports.router = router;

关键逻辑是以下中间件:

Where the key logic is the following middleware:

  function (req, res, next) {
    res.connection.setTimeout(delay);
    next();
  }

我希望此参考资料对其他人有用.

I hope this reference will come in handy for others.

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