CODEWITHSUNDEEP
node.jswritefile
imv
imv

Reputation: 446

Node.js how to cancel a WriteFile operation

Is there a way to cancel a WriteFile operation?

example:

     await promises.writeFile(path, data)

Upvotes: 1

Views: 332

Answers (1)

Andrew Gillis
Andrew Gillis

Reputation: 3885

Yes you need to create an AbortController and pass it into your writeFile call:

const fs = require('fs')

// Some stub values
const tempFilePath = () => `/tmp/foo`
data = 'bar'


const myAbortController = new AbortController()
// With callback
fs.writeFile(tempFilePath(), data, { signal: myAbortController.signal }, (err) => {
  if(err) {
    if(err.name === "AbortError") {
      console.warn("write aborted")
      return
    }
    throw err
  }
})
// Or with promises
fs.promises.writeFile(tempFilePath(), data, { signal: myAbortController.signal })
  .catch((err) =>  {
    if(err.name === "AbortError") {
      console.warn("write aborted")
      return
    }
    throw err
  })
// Or Async/Await
;(async () => {
  try {
    await fs.promises.writeFile(tempFilePath(), data, { signal: myAbortController.signal })
  } catch (err) {
    if(err.name === "AbortError") {
      console.warn("write aborted")
      return
    }
      throw err
  }
})()

// Somewhere else...
myAbortController.abort()

The code is tested and runs in v18, v16, and v14 with the --experimental-abortcontroller flag

Upvotes: 1

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