@expo/server
Version:
Server API for Expo Router projects
74 lines • 2.68 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.createRequestHandler = createRequestHandler;
exports.convertHeaders = convertHeaders;
exports.convertRequest = convertRequest;
exports.respond = respond;
const node_stream_1 = require("node:stream");
const promises_1 = require("node:stream/promises");
const index_1 = require("../index");
/**
* Returns a request handler for Vercel's Node.js runtime that serves the
* response using Remix.
*/
function createRequestHandler({ build }) {
const handleRequest = (0, index_1.createRequestHandler)(build);
return async (req, res) => {
return respond(res, await handleRequest(convertRequest(req, res)));
};
}
function convertHeaders(requestHeaders) {
const headers = new Headers();
for (const [key, values] of Object.entries(requestHeaders)) {
if (values) {
if (Array.isArray(values)) {
for (const value of values) {
headers.append(key, value);
}
}
else {
headers.set(key, values);
}
}
}
return headers;
}
function convertRawHeaders(requestHeaders) {
const headers = new Headers();
for (let index = 0; index < requestHeaders.length; index += 2) {
headers.append(requestHeaders[index], requestHeaders[index + 1]);
}
return headers;
}
function convertRequest(req, res) {
const host = req.headers['x-forwarded-host'] || req.headers['host'];
// doesn't seem to be available on their req object!
const protocol = req.headers['x-forwarded-proto'] || 'https';
const url = new URL(`${protocol}://${host}${req.url}`);
// Abort action/loaders once we can no longer write a response
const controller = new AbortController();
res.on('close', () => controller.abort());
const init = {
method: req.method,
headers: convertRawHeaders(req.rawHeaders),
// Cast until reason/throwIfAborted added
// https://github.com/mysticatea/abort-controller/issues/36
signal: controller.signal,
};
if (req.method !== 'GET' && req.method !== 'HEAD') {
init.body = node_stream_1.Readable.toWeb(req);
init.duplex = 'half';
}
return new Request(url.href, init);
}
async function respond(res, expoRes) {
res.statusMessage = expoRes.statusText;
res.writeHead(expoRes.status, expoRes.statusText, [...expoRes.headers.entries()].flat());
if (expoRes.body) {
await (0, promises_1.pipeline)(node_stream_1.Readable.fromWeb(expoRes.body), res);
}
else {
res.end();
}
}
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