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163 lines
5.7 KiB
Plaintext
163 lines
5.7 KiB
Plaintext
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.createHandler = exports.parseRequestParams = void 0;
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const handler_1 = require("../handler");
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/**
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* The GraphQL over HTTP spec compliant request parser for an incoming GraphQL request.
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*
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* It is important to pass in the `abortedRef` so that the parser does not perform any
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* operations on a disposed request (see example).
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*
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* If the HTTP request _is not_ a [well-formatted GraphQL over HTTP request](https://graphql.github.io/graphql-over-http/draft/#sec-Request), the function will respond
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* on the `HttpResponse` argument and return `null`.
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*
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* If the HTTP request _is_ a [well-formatted GraphQL over HTTP request](https://graphql.github.io/graphql-over-http/draft/#sec-Request), but is invalid or malformed,
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* the function will throw an error and it is up to the user to handle and respond as they see fit.
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*
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* ```js
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* import uWS from 'uWebSockets.js'; // yarn add uWebSockets.js@uNetworking/uWebSockets.js#<version>
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* import { parseRequestParams } from 'graphql-http/lib/use/uWebSockets';
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*
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* uWS
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* .App()
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* .any('/graphql', async (res, req) => {
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* const abortedRef = { current: false };
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* res.onAborted(() => (abortedRef.current = true));
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* try {
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* const maybeParams = await parseRequestParams(req, res, abortedRef);
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* if (!maybeParams) {
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* // not a well-formatted GraphQL over HTTP request,
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* // parser responded and there's nothing else to do
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* return;
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* }
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*
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* // well-formatted GraphQL over HTTP request,
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* // with valid parameters
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* if (!abortedRef.current) {
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* res.writeStatus('200 OK');
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* res.end(JSON.stringify(maybeParams, null, ' '));
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* }
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* } catch (err) {
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* // well-formatted GraphQL over HTTP request,
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* // but with invalid parameters
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* if (!abortedRef.current) {
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* res.writeStatus('400 Bad Request');
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* res.end(err.message);
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* }
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* }
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* })
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* .listen(4000, () => {
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* console.log('Listening to port 4000');
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* });
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* ```
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*
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* @category Server/uWebSockets
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*/
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async function parseRequestParams(req, res, abortedRef) {
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const rawReq = toRequest(req, res, abortedRef);
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const paramsOrRes = await (0, handler_1.parseRequestParams)(rawReq);
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if (!('query' in paramsOrRes)) {
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if (!abortedRef.current) {
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const [body, init] = paramsOrRes;
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res.cork(() => {
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res.writeStatus(`${init.status} ${init.statusText}`);
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for (const [key, val] of Object.entries(init.headers || {})) {
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res.writeHeader(key, val);
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}
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if (body) {
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res.end(body);
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}
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else {
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res.endWithoutBody();
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}
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});
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}
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return null;
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}
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return paramsOrRes;
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}
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exports.parseRequestParams = parseRequestParams;
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/**
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* Create a GraphQL over HTTP spec compliant request handler for
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* the Node environment [uWebSockets.js module](https://github.com/uNetworking/uWebSockets.js/).
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*
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* ```js
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* import uWS from 'uWebSockets.js'; // yarn add uWebSockets.js@uNetworking/uWebSockets.js#<version>
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* import { createHandler } from 'graphql-http/lib/use/uWebSockets';
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* import { schema } from './my-graphql-schema';
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*
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* uWS
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* .App()
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* .any('/graphql', createHandler({ schema }))
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* .listen(4000, () => {
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* console.log('Listening to port 4000');
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* });
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* ```
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*
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* @category Server/uWebSockets
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*/
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function createHandler(options) {
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const handle = (0, handler_1.createHandler)(options);
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return async function requestListener(res, req) {
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const abortedRef = { current: false };
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res.onAborted(() => (abortedRef.current = true));
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try {
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const [body, init] = await handle(toRequest(req, res, abortedRef));
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if (!abortedRef.current) {
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res.cork(() => {
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res.writeStatus(`${init.status} ${init.statusText}`);
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for (const [key, val] of Object.entries(init.headers || {})) {
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res.writeHeader(key, val);
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}
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if (body) {
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res.end(body);
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}
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else {
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res.endWithoutBody();
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}
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});
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}
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}
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catch (err) {
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// The handler shouldnt throw errors.
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// If you wish to handle them differently, consider implementing your own request handler.
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console.error('Internal error occurred during request handling. ' +
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'Please check your implementation.', err);
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if (!abortedRef.current) {
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res.cork(() => {
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res.writeStatus('500 Internal Server Error').endWithoutBody();
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});
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}
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}
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};
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}
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exports.createHandler = createHandler;
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function toRequest(req, res, abortedRef) {
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let url = req.getUrl();
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const query = req.getQuery();
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if (query) {
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url += '?' + query;
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}
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return {
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url,
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method: req.getMethod().toUpperCase(),
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headers: { get: (key) => req.getHeader(key) },
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body: () => new Promise((resolve) => {
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let body = '';
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if (abortedRef.current) {
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resolve(body);
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}
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else {
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res.onData((chunk, isLast) => {
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body += Buffer.from(chunk, 0, chunk.byteLength).toString();
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if (isLast) {
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resolve(body);
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}
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});
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}
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}),
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raw: req,
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context: { res },
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};
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}
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