I am working with a VS Code client that sends requests to a server using the following code:
client.sendRequest(req, cursor).then((answer)=> {
processing...
})
If for some valid reason the server does not send any response, what will happen?
Is there a way for me to handle this scenario and display a message accordingly?
When utilizing the code from https://github.com/microsoft/vscode-languageserver-node/blob/main/client/src/common/client.ts, my suggestion would be to race the returned promise with another promise that resolves after a setTimeout function completes. In the signature of sendRequest, include a parameter for passing a cancellation token which can be utilized whenever necessary (e.g. if the promise race resolves with the setTimeout promise). If the sendRequest promise wins the race, proceed to clear the timeout ID from the setTimeout promise.
The following code is speculative and might not work due to lack of testing:
const millis = // TODO
let timeoutID;
const cancelTokenSrc = new CancellationTokenSource();
const timeout = new Promise((resolve)=>{timeoutID=setTimeout(resolve,millis,cancelTokenSrc)});
const winner = await Promise.race(timeout, client.sendRequest(/**blah blah, */cancelTokenSrc.token));
if (winner === cancelTokenSrc) {
cancelTokenSrc.cancel();
// timed out.
} else {
clearTimeout(timeoutID);
// do stuff with winner
}
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