Returning to the location in the file where the redirect function was invoked in the Express framework

Question

Returning to the location in the file where the redirect function was invoked in the Express framework

In my current project, I am working on an Express app and facing a challenge. I need to redirect after collecting data in a function, complete the redirect, return the data, and then resume from where I left off.

For instance:

> res.redirect('my/path' + someVariable);
> Traverse various routes and web pages to gather data
> Return to the point after the initial redirect with new data
> Perform checks with previous and new data before moving forward

Is this a common scenario? Are there straightforward ways to achieve this? Happy to provide further clarification if needed.

Thank you!

javascript express http-redirect

Answer 1

Answer №1

Use querystrings to transfer data between different paths. To see an example in action, run the code locally and go to localhost:4000/path0.

const express = require('express')
const app = express()

app.get('/path0', (req, res, next) => {
  if (!req.query.value) { // no data yet
    res.redirect('/path1?redirect=/path0') // move to another path to obtain data
  } else {
    res.write(`<h1>Value is: ${req.query.value}</h1>`)
    res.end()
  }
})

app.get('/path1', (req, res, next) => {
  let value = Math.random(10) // assuming this is the desired data
  let redirectPath = req.query.redirect || '/path0'
  res.redirect(`/path0?value=${value}`) // return back with data included in querystring
})

app.listen(4000)

Another method to send data back is by utilizing Set-Cookie after the initial redirect, instead of directly passing the data through the querystring of the subsequent redirection. This approach should function properly in most modern browsers even when using a 302 status code, for more information check here.

Answer 2

Use querystrings to transfer data between different paths. To see an example in action, run the code locally and go to localhost:4000/path0.

const express = require('express')
const app = express()

app.get('/path0', (req, res, next) => {
  if (!req.query.value) { // no data yet
    res.redirect('/path1?redirect=/path0') // move to another path to obtain data
  } else {
    res.write(`<h1>Value is: ${req.query.value}</h1>`)
    res.end()
  }
})

app.get('/path1', (req, res, next) => {
  let value = Math.random(10) // assuming this is the desired data
  let redirectPath = req.query.redirect || '/path0'
  res.redirect(`/path0?value=${value}`) // return back with data included in querystring
})

app.listen(4000)

Another method to send data back is by utilizing Set-Cookie after the initial redirect, instead of directly passing the data through the querystring of the subsequent redirection. This approach should function properly in most modern browsers even when using a 302 status code, for more information check here.

Returning to the location in the file where the redirect function was invoked in the Express framework

Answer №1

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