How can I wait for a promise result in a HttpActionResult method? about c-sharp-promise HOT 3 CLOSED

Does the 3rd party API give you some sort of callback?

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@ashleydavis Wonderful library but I am also caught up in this same situation. Third party API performs some data manipulation and returns an updated response or fails with reasons where required. How does one wait for the then/done/catch callbacks before dispatching an IHttpActionResult response to the calling client?

Thanks

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Old question I know but I figured I should write a response in case anyone else comes across this. It all boils down to how the 3rd party API you're using works, so there is no single solution that will always work without seeing more info.

It depends how the 3rd party API you're

If the API gives you a way to pass a function called when the request is completed, you can create a new Promise<T>() when you first send the request and then call .Resolve(data) on it once you have a result.

IPromise<string> HttpGet(string url)
{
    var promise = new Promise<string>();
    ThirdPartyAPI.Get(url, data => promise.Resolve(data));
    return promise;
}

Similarly, if there is an event triggered when the request completes you can connect that to a function that resolves your promise.

If you want to convert an async/await API to use Promises you should be able to use similar code but call ContinueWith on the async task and resolve your new promise inside the ContinueWith callback. I haven't tested this method though, since async/await already has most of the functionality of Promises built-in anyway.

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