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Daniel LeeandGitHub
6ab1e32756
The new .stream() API allows the client to consume streaming responses from the WIP streaming callable functions in Firebase Functions Node.js SDK.
When client makes a request to the callable function w/ header Accept: text/event-stream, the callable function responds with response chunks in Server-Sent Event format.
The sdk changes here abstracts over the wire-protocol by parsing the response chunks and returning an instance of a AsyncIterable to consume to data:
import { getFunctions, httpsCallable } from "firebase/functions";
const functions = getFunctions();
const generateText = httpsCallable(functions, 'generateText');
const resp = await generateText.stream(
{ text: 'What is your favorite Firebase service and why?' },
{ signal: AbortSignal.timeout(60_000) },
);
try {
for await (const message of resp.stream) {
console.log(message); // prints "foo", "bar"
}
console.log(await resp.data) // prints "foo bar"
} catch (e) {
// FirebaseError(code='cancelled', message='Request was cancelled.');
console.error(e)
}
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Project: /docs/reference/js/_project.yaml Book: /docs/reference/_book.yaml page_type: reference
{% comment %} DO NOT EDIT THIS FILE! This is generated by the JS SDK team, and any local changes will be overwritten. Changes should be made in the source code at https://github.com/firebase/firebase-js-sdk {% endcomment %}
HttpsCallable interface
A reference to a "callable" HTTP trigger in Cloud Functions.
Signature:
export interface HttpsCallable<RequestData = unknown, ResponseData = unknown, StreamData = unknown>
Properties
| Property | Type | Description |
|---|---|---|
| stream | (data?: RequestData | null, options?: HttpsCallableStreamOptions) => Promise<HttpsCallableStreamResult<ResponseData, StreamData>> |
HttpsCallable.stream
Signature:
stream: (data?: RequestData | null, options?: HttpsCallableStreamOptions) => Promise<HttpsCallableStreamResult<ResponseData, StreamData>>;