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