mirror of
https://github.com/fluencelabs/fluence-js.git
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36c7619b4a
* Add test server * remove headless * Support for web-cra * Review fixes and bug fixes * Add error message
71 lines
2.1 KiB
TypeScript
71 lines
2.1 KiB
TypeScript
/**
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* Copyright 2023 Fluence Labs Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import fs from "fs";
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import module from "module";
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import path from "path";
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/**
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* @param pkg name of package
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* @param assetPath path of required asset in given package
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* @param root CDN domain in browser or file system root in node
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*/
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export async function fetchResource(
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pkg: string,
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assetPath: string,
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root: string,
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) {
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// TODO: `root` will be handled somehow in the future. For now, we use filesystem root where js-client is running;
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root = "/";
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const require = module.createRequire(import.meta.url);
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const packagePathIndex = require.resolve(pkg);
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// Ensure that windows path is converted to posix path. So we can find a package
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const posixPath = packagePathIndex.split(path.sep).join(path.posix.sep);
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const matches = new RegExp(`(.+${pkg})`).exec(posixPath);
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const packagePath = matches?.[0];
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if (packagePath == null) {
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throw new Error(`Cannot find dependency ${pkg} in path ${posixPath}`);
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}
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const pathToResource = path.join(root, packagePath, assetPath);
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const file = await new Promise<ArrayBuffer>((resolve, reject) => {
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// Cannot use 'fs/promises' with current vite config. This module is not polyfilled by default.
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fs.readFile(pathToResource, (err, data) => {
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if (err != null) {
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reject(err);
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return;
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}
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resolve(data);
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});
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});
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return new Response(file, {
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headers: {
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"Content-type": assetPath.endsWith(".wasm")
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? "application/wasm"
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: assetPath.endsWith(".js")
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? "application/javascript"
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: "application/text",
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},
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});
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}
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