@expo/server
Version:
Server API for Expo Router projects
124 lines • 4.52 kB
JavaScript
;
/**
* Copyright © 2024 650 Industries.
* Copyright © 2024 dai-shi.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* https://github.com/dai-shi/waku/blob/f9111ed7d96c95d7e128b37e8f7ae2d80122218e/packages/waku/src/lib/middleware/rsc.ts#L1
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.decodeInput = void 0;
exports.getRscMiddleware = getRscMiddleware;
const decodeInput = (encodedInput) => {
if (encodedInput === 'index.txt') {
return '';
}
if (encodedInput?.endsWith('.txt')) {
return encodedInput.slice(0, -'.txt'.length);
}
const err = new Error('Invalid encoded input');
err.statusCode = 400;
throw err;
};
exports.decodeInput = decodeInput;
// Production / Development API Route for handling RSC. Must be applied to the RSC paths, e.g. `/_flight/[...slug]+api.tsx`
function getRscMiddleware(options) {
let rscPathPrefix = options.rscPath;
if (rscPathPrefix !== '/' && !rscPathPrefix.endsWith('/')) {
rscPathPrefix += '/';
}
async function getOrPostAsync(req) {
const url = new URL(req.url);
const { method } = req;
if (method !== 'GET' && method !== 'POST') {
throw new Error(`Unsupported method '${method}'`);
}
const platform = url.searchParams.get('platform') ?? req.headers.get('expo-platform');
if (typeof platform !== 'string' || !platform) {
return new Response('Missing expo-platform header or platform query parameter', {
status: 500,
headers: {
'Content-Type': 'text/plain',
},
});
}
const engine = url.searchParams.get('transform.engine');
// TODO: Will the hermes flag apply in production later?
if (engine && !['hermes'].includes(engine)) {
return new Response(`Query parameter "transform.engine" is an unsupported value: ${engine}`, {
status: 500,
headers: {
'Content-Type': 'text/plain',
},
});
}
let encodedInput = url.pathname.replace(
// TODO: baseUrl support
rscPathPrefix, '');
// First segment should be the target platform.
// This is used for aligning with production exports which are statically exported to a single location at build-time.
encodedInput = encodedInput.replace(new RegExp(`^${platform}/`), '');
try {
encodedInput = (0, exports.decodeInput)(encodedInput);
}
catch {
return new Response(`Invalid encoded input: "${encodedInput}"`, {
status: 400,
headers: {
'Content-Type': 'text/plain',
},
});
}
try {
const args = {
config: options.config,
platform,
engine: engine,
input: encodedInput,
searchParams: url.searchParams,
method,
body: req.body,
contentType: req.headers.get('Content-Type') ?? '',
decodedBody: req.headers.get('X-Expo-Params'),
onError: options.onError,
headers: headersToRecord(req.headers),
};
const readable = await options.renderRsc(args);
return new Response(readable, {
headers: {
// The response is a streamed text file
'Content-Type': 'text/plain',
},
});
}
catch (err) {
if (err instanceof Response) {
return err;
}
if (process.env.NODE_ENV !== 'development') {
throw err;
}
console.error(err);
return new Response(`Unexpected server error rendering RSC: ` + err.message, {
status: 'statusCode' in err ? err.statusCode : 500,
headers: {
'Content-Type': 'text/plain',
},
});
}
}
return {
GET: getOrPostAsync,
POST: getOrPostAsync,
};
}
function headersToRecord(headers) {
const record = {};
for (const [key, value] of headers.entries()) {
record[key] = value;
}
return record;
}
//# sourceMappingURL=rsc.js.map