@expo/server
Version:
Server API for Expo Router projects
90 lines • 3.03 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 Express that serves the response using Remix.
*/
function createRequestHandler({ build }, setup) {
const handleRequest = (0, index_1.createRequestHandler)(build, setup);
return async (req, res, next) => {
if (!req?.url || !req.method) {
return next();
}
try {
const request = convertRequest(req, res);
const response = await handleRequest(request);
await respond(res, response);
}
catch (error) {
// Express doesn't support async functions, so we have to pass along the
// error manually using next().
next(error);
}
};
}
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 url = new URL(`${req.protocol}://${req.get('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.status(expoRes.status);
if (typeof res.setHeaders === 'function') {
res.setHeaders(expoRes.headers);
}
else {
for (const [key, value] of expoRes.headers.entries()) {
res.appendHeader(key, value);
}
}
if (expoRes.body) {
await (0, promises_1.pipeline)(node_stream_1.Readable.fromWeb(expoRes.body), res);
}
else {
res.end();
}
}
//# sourceMappingURL=express.js.map
;