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127 lines
4.6 KiB
Plaintext
127 lines
4.6 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 return a `Response`.
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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 http from 'http';
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* import { createServerAdapter } from '@whatwg-node/server'; // yarn add @whatwg-node/server
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* import { parseRequestParams } from 'graphql-http/lib/use/fetch';
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*
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* // Use this adapter in _any_ environment.
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* const adapter = createServerAdapter({
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* handleRequest: async (req) => {
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* try {
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* const paramsOrResponse = await parseRequestParams(req);
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* if (paramsOrResponse instanceof Response) {
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* // not a well-formatted GraphQL over HTTP request,
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* // parser created a response object to use
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* return paramsOrResponse;
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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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* return new Response(JSON.stringify(paramsOrResponse, null, ' '), {
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* status: 200,
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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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* return new Response(err.message, { status: 400 });
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* }
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* },
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* });
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*
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* const server = http.createServer(adapter);
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*
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* server.listen(4000);
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* console.log('Listening to port 4000');
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* ```
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*
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* @category Server/fetch
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*/
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async function parseRequestParams(req, api = {}) {
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const rawReq = toRequest(req, api);
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const paramsOrRes = await (0, handler_1.parseRequestParams)(rawReq);
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if (!('query' in paramsOrRes)) {
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const [body, init] = paramsOrRes;
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return new (api.Response || Response)(body, init);
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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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* a fetch environment like Deno, Bun, CloudFlare Workers, Lambdas, etc.
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*
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* You can use [@whatwg-node/server](https://github.com/ardatan/whatwg-node/tree/master/packages/server) to create a server adapter and
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* isomorphically use it in _any_ environment. See an example:
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*
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* ```js
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* import http from 'http';
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* import { createServerAdapter } from '@whatwg-node/server'; // yarn add @whatwg-node/server
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* import { createHandler } from 'graphql-http/lib/use/fetch';
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* import { schema } from './my-graphql-schema';
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*
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* // Use this adapter in _any_ environment.
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* const adapter = createServerAdapter({
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* handleRequest: createHandler({ schema }),
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* });
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*
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* const server = http.createServer(adapter);
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*
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* server.listen(4000);
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* console.log('Listening to port 4000');
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* ```
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*
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* @param reqCtx - Custom fetch API engine, will use from global scope if left undefined.
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*
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* @category Server/fetch
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*/
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function createHandler(options, reqCtx = {}) {
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const api = {
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Response: reqCtx.Response || Response,
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TextEncoder: reqCtx.TextEncoder || TextEncoder,
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ReadableStream: reqCtx.ReadableStream || ReadableStream,
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};
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const handler = (0, handler_1.createHandler)(options);
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return async function handleRequest(req) {
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try {
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const [body, init] = await handler(toRequest(req, api));
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return new api.Response(body, init);
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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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return new api.Response(null, { status: 500 });
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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, api = {}) {
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return {
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method: req.method,
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url: req.url,
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headers: req.headers,
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body: () => req.text(),
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raw: req,
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context: {
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Response: api.Response || Response,
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TextEncoder: api.TextEncoder || TextEncoder,
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ReadableStream: api.ReadableStream || ReadableStream,
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},
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};
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}
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