How to handle timeout request in koa?

@herminia_bruen 

To handle timeout requests in Koa, you can use middleware. Here's an example of how you can implement it:

1. First, install the koa-timeout package:

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npm install koa-timeout

1. Import the necessary modules in your Koa application:

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const Koa = require('koa');
const timeout = require('koa-timeout');

1. Set a timeout threshold and apply the middleware to your Koa app:

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const app = new Koa();

// This specifies the maximum time a request can take before timing out
app.use(timeout(5000));

// Your other middleware and routes

In the above example, the timeout is set to 5 seconds (5000 milliseconds). You can adjust this value according to your requirements.

1. Optionally, you can also define a custom timeout handler to handle the request when it times out:

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app.use(function(ctx, next) {
  // Custom timeout handler
  ctx.status = 503; // Service Unavailable
  ctx.body = 'Request timeout';
});

In this example, a 503 status code indicates that the service is temporarily unavailable, and the response body is set to 'Request timeout'.

With this setup, if a request takes longer than the specified timeout period, the timeout middleware will trigger the timeout handler, providing a way to handle the timeout request appropriately.