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Mingwei Samuel 74eb5fa045 Update example proxy for v2, use workspaces. - `example/proxy` is new folder for `example_proxy`. - `riven` is new folder for the main riven lib. - Updated metadata to be an array and include HTTP method.		2021-09-09 14:31:39 -07:00
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inflight.js	Update example proxy for v2, use workspaces.	2021-09-09 14:31:39 -07:00
LICENSE	Update example proxy for v2, use workspaces.	2021-09-09 14:31:39 -07:00
package.json	Update example proxy for v2, use workspaces.	2021-09-09 14:31:39 -07:00
README.md	Update example proxy for v2, use workspaces.	2021-09-09 14:31:39 -07:00

README.md

inflight

Add callbacks to requests in flight to avoid async duplication

USAGE

var inflight = require('inflight')

// some request that does some stuff
function req(key, callback) {
  // key is any random string.  like a url or filename or whatever.
  //
  // will return either a falsey value, indicating that the
  // request for this key is already in flight, or a new callback
  // which when called will call all callbacks passed to inflightk
  // with the same key
  callback = inflight(key, callback)

  // If we got a falsey value back, then there's already a req going
  if (!callback) return

  // this is where you'd fetch the url or whatever
  // callback is also once()-ified, so it can safely be assigned
  // to multiple events etc.  First call wins.
  setTimeout(function() {
    callback(null, key)
  }, 100)
}

// only assigns a single setTimeout
// when it dings, all cbs get called
req('foo', cb1)
req('foo', cb2)
req('foo', cb3)
req('foo', cb4)