@graphql-mesh/plugin-http2/cjs/index.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/* eslint-disable import/no-nodejs-modules */
const http2_1 = require("http2");
const stream_1 = require("stream");
const utils_1 = require("@graphql-mesh/utils");
const fetch_1 = require("@whatwg-node/fetch");
function useHTTP2(opts) {
    const sessionsByOrigin = (0, utils_1.createLruCache)();
    function getSessionByOrigin(origin) {
        let session = sessionsByOrigin.get(origin);
        if (!session) {
            session = (0, http2_1.connect)(origin);
            sessionsByOrigin.set(origin, session);
        }
        return session;
    }
    opts.pubsub.subscribe('destroy', () => {
        sessionsByOrigin.keys().forEach(origin => {
            const session = sessionsByOrigin.get(origin);
            if (session) {
                session.destroy();
            }
        });
    });
    return {
        onFetch({ setFetchFn }) {
            setFetchFn(function fetchForOrigin(url, options) {
                const { origin, pathname, search } = new URL(url);
                const session = getSessionByOrigin(origin);
                const stream = session.request({
                    ...(0, utils_1.getHeadersObj)(options.headers),
                    ':method': options.method,
                    ':path': pathname + search,
                }, {
                    signal: options.signal,
                });
                if (options.body) {
                    stream_1.Readable.from(options.body).pipe(stream);
                }
                else {
                    stream.end();
                }
                return new Promise(resolve => {
                    let status = 200;
                    const responseHeaders = {};
                    stream.once('response', headers => {
                        for (const key in headers) {
                            if (key === ':status') {
                                status = headers[key];
                            }
                            else {
                                responseHeaders[key] = headers[key];
                            }
                        }
                        resolve(new fetch_1.Response(stream, {
                            headers: responseHeaders,
                            status,
                        }));
                    });
                });
            });
        },
    };
}
exports.default = useHTTP2;