altair-graphql-core/build/request/handlers/sse.js

Several of the core logic for altair graphql client

import { Observable } from 'rxjs';
import { createClient } from 'graphql-sse';
import { simpleResponseObserver } from '../utils';
export class SSERequestHandler {
    handle(request) {
        return new Observable((subscriber) => {
            this.client = createClient({
                url: request.url,
                credentials: request.withCredentials ? 'include' : 'same-origin',
                headers: request.headers?.reduce((acc, { key, value }) => {
                    acc[key] = value;
                    return acc;
                }, {}),
            });
            if (!this.client) {
                throw new Error('Could not create SSE client!');
            }
            const requestStartTimestamp = Date.now();
            this.cleanup = this.client.subscribe({
                query: request.query,
                variables: request.variables,
                operationName: request.selectedOperation ?? undefined,
                extensions: request.extensions,
            }, simpleResponseObserver(subscriber, request.url, requestStartTimestamp));
            return () => {
                this.destroy();
            };
        });
    }
    async destroy() {
        try {
            this.cleanup?.();
            this.cleanup = undefined;
            await this.client?.dispose();
            this.client = undefined;
        }
        catch (err) {
            console.error(err);
        }
    }
}
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