54 lines
1.9 KiB
Plaintext
54 lines
1.9 KiB
Plaintext
# async-retry
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[](https://github.com/airbnb/javascript)
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[](https://spectrum.chat/zeit)
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Retrying made simple, easy, and async.
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## Usage
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```js
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// Packages
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const retry = require('async-retry')
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const fetch = require('node-fetch')
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await retry(async bail => {
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// if anything throws, we retry
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const res = await fetch('https://google.com')
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if (403 === res.status) {
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// don't retry upon 403
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bail(new Error('Unauthorized'))
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return
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}
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const data = await res.text()
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return data.substr(0, 500)
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}, {
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retries: 5
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})
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```
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### API
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```js
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retry(retrier : Function, opts : Object) => Promise
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```
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- The supplied function can be `async` or not. In other words, it can be a function that returns a `Promise` or a value.
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- The supplied function receives two parameters
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1. A `Function` you can invoke to abort the retrying (bail)
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2. A `Number` identifying the attempt. The absolute first attempt (before any retries) is `1`.
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- The `opts` are passed to `node-retry`. Read [its docs](https://github.com/tim-kos/node-retry)
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* `retries`: The maximum amount of times to retry the operation. Default is `10`.
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* `factor`: The exponential factor to use. Default is `2`.
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* `minTimeout`: The number of milliseconds before starting the first retry. Default is `1000`.
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* `maxTimeout`: The maximum number of milliseconds between two retries. Default is `Infinity`.
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* `randomize`: Randomizes the timeouts by multiplying with a factor between `1` to `2`. Default is `true`.
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* `onRetry`: an optional `Function` that is invoked after a new retry is performed. It's passed the `Error` that triggered it as a parameter.
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## Authors
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- Guillermo Rauch ([@rauchg](https://twitter.com/rauchg)) - [ZEIT](https://zeit.co)
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- Leo Lamprecht ([@notquiteleo](https://twitter.com/notquiteleo)) - [ZEIT](https://zeit.co)
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