├── .cargo-ok ├── .gitignore ├── .prettierrc ├── LICENSE_APACHE ├── LICENSE_MIT ├── README.md ├── package-lock.json ├── package.json ├── src ├── handler.ts └── index.ts ├── test ├── _setup.ts ├── handler.ts └── tsconfig.json ├── tsconfig.json ├── webpack.config.js └── wrangler.toml /.cargo-ok: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/alsotang/cf_workers__file/f2a81dcda59b191ea8e510eef11af30d99c15f6e/.cargo-ok -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | dist 2 | node_modules 3 | transpiled 4 | worker -------------------------------------------------------------------------------- /.prettierrc: -------------------------------------------------------------------------------- 1 | { 2 | "singleQuote": true, 3 | "semi": false, 4 | "trailingComma": "all", 5 | "tabWidth": 2, 6 | "printWidth": 80 7 | } -------------------------------------------------------------------------------- /LICENSE_APACHE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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IN NO EVENT 21 | SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 22 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 24 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 | DEALINGS IN THE SOFTWARE. -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # description 2 | 3 | Generate arbitrary size file on [Cloudflare Workers](https://workers.cloudflare.com/). 4 | 5 | You can use this service to test your network download speed. 6 | 7 | # usage 8 | 9 | 10 | ```bash 11 | wget https://file.ringring.workers.dev/100m 12 | wget https://file.ringring.workers.dev/1g 13 | wget https://file.ringring.workers.dev/500k 14 | ``` 15 | 16 | # limits 17 | 18 | * No transfer speed limit, since it is based on Cloudflare Workers worldwide. 19 | * No file size limit. The service use stream to generate file internally. 20 | * Download time should under 30s, otherwise the worker may abort. -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "pname", 3 | "version": "1.0.0", 4 | "description": "Cloudflare worker TypeScript template", 5 | "main": "index.js", 6 | "scripts": { 7 | "build": "webpack", 8 | "dev": "NODE_ENV=development npm run build", 9 | "format": "prettier --write '**/*.{ts,js,css,json,md}'", 10 | "test:clean": "rimraf ./transpiled/src ./transpiled/test", 11 | "test": "npm run test:clean && npm run transpile && mocha --require source-map-support/register --recursive transpiled/test", 12 | "transpile": "tsc --project ./test" 13 | }, 14 | "author": "author", 15 | "license": "MIT OR Apache-2.0", 16 | "devDependencies": { 17 | "@cloudflare/workers-types": "^2.0.0", 18 | "@types/chai": "^4.2.11", 19 | "@types/filesize-parser": "^1.5.0", 20 | "@types/mocha": "^7.0.2", 21 | "chai": "^4.2.0", 22 | "mocha": "^8.0.1", 23 | "prettier": "^2.0.5", 24 | "rimraf": "^3.0.2", 25 | "service-worker-mock": "^2.0.5", 26 | "ts-loader": "^7.0.5", 27 | "typescript": "^3.9.5", 28 | "webpack": "^4.43.0", 29 | "webpack-cli": "^3.3.12" 30 | }, 31 | "dependencies": { 32 | "filesize-parser": "^1.5.0" 33 | } 34 | } 35 | -------------------------------------------------------------------------------- /src/handler.ts: -------------------------------------------------------------------------------- 1 | import filesizeParser from 'filesize-parser' 2 | 3 | // per chunk size should not reach worker's memory limit 4 | // https://developers.cloudflare.com/workers/platform/limits 5 | const MAX_CHUNK_SIZE = 1024 * 1024 * 10; // 10MB 6 | 7 | export async function handleRequest(request: Request): Promise { 8 | const url = new URL(request.url); 9 | 10 | if (url.pathname === '/') { 11 | return Response.redirect('https://github.com/alsotang/cf_workers__file', 302) 12 | } 13 | 14 | const desiredSize = getDesiredSize(url.pathname); 15 | let sendedSize = 0; 16 | 17 | let { readable, writable } = new TransformStream() 18 | 19 | // return the readable first, then write to it 20 | setTimeout(async () => { 21 | const MAX_CHUNK = new Uint8Array(MAX_CHUNK_SIZE) 22 | const writer = writable.getWriter() 23 | 24 | // use stream to keep memory usage small enough 25 | while (sendedSize < desiredSize) { 26 | const chunkSize = Math.min(desiredSize - sendedSize, MAX_CHUNK_SIZE); 27 | if (chunkSize === MAX_CHUNK_SIZE) { 28 | await writer.write(MAX_CHUNK) 29 | } else { 30 | await writer.write(new Uint8Array(chunkSize)) 31 | } 32 | sendedSize += chunkSize; 33 | } 34 | 35 | writer.close() 36 | }, 0); 37 | 38 | return new Response(readable, { 39 | headers: { 40 | 'Content-Disposition': 'attachment; filename="file.bin"' 41 | } 42 | }) 43 | } 44 | 45 | function getDesiredSize(pathname: string) { 46 | return filesizeParser(pathname.slice(1)); 47 | } 48 | -------------------------------------------------------------------------------- /src/index.ts: -------------------------------------------------------------------------------- 1 | import { handleRequest } from './handler' 2 | 3 | addEventListener('fetch', (event) => { 4 | event.respondWith(handleRequest(event.request)) 5 | }) 6 | -------------------------------------------------------------------------------- /test/_setup.ts: -------------------------------------------------------------------------------- 1 | // set up global namespace for worker environment 2 | import * as makeServiceWorkerEnv from 'service-worker-mock' 3 | declare var global: any 4 | Object.assign(global, makeServiceWorkerEnv()) 5 | -------------------------------------------------------------------------------- /test/handler.ts: -------------------------------------------------------------------------------- 1 | import { expect } from 'chai' 2 | import { handleRequest } from '../src/handler' 3 | 4 | describe('handler returns response with request method', () => { 5 | const methods = [ 6 | 'GET', 7 | 'HEAD', 8 | 'POST', 9 | 'PUT', 10 | 'DELETE', 11 | 'CONNECT', 12 | 'OPTIONS', 13 | 'TRACE', 14 | 'PATCH', 15 | ] 16 | methods.forEach((method) => { 17 | it(method, async () => { 18 | const result = await handleRequest(new Request('/', { method })) 19 | const text = await result.text() 20 | expect(text).to.include(method) 21 | }) 22 | }) 23 | }) 24 | -------------------------------------------------------------------------------- /test/tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | "outDir": "../transpiled", 4 | "target": "esnext", 5 | "module": "commonjs", 6 | "sourceMap": true, 7 | "experimentalDecorators": true, 8 | "lib": ["esnext", "webworker"] 9 | }, 10 | "include": ["./*.ts", "../node_modules/@cloudflare/workers-types/index.d.ts"] 11 | } 12 | -------------------------------------------------------------------------------- /tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | "outDir": "./dist", 4 | "module": "commonjs", 5 | "target": "esnext", 6 | "lib": ["esnext", "webworker"], 7 | "alwaysStrict": true, 8 | "strict": true, 9 | "preserveConstEnums": true, 10 | "moduleResolution": "node", 11 | "sourceMap": true, 12 | "esModuleInterop": true, 13 | "types": ["@cloudflare/workers-types"] 14 | }, 15 | "include": [ 16 | "./src/*.ts", 17 | "./test/*.ts", 18 | "./src/**/*.ts", 19 | "./test/**/*.ts", 20 | "./node_modules/@cloudflare/workers-types/index.d.ts" 21 | ], 22 | "exclude": ["node_modules/", "dist/"] 23 | } 24 | -------------------------------------------------------------------------------- /webpack.config.js: -------------------------------------------------------------------------------- 1 | const path = require('path') 2 | const webpack = require('webpack') 3 | 4 | const mode = process.env.NODE_ENV || 'production' 5 | 6 | module.exports = { 7 | output: { 8 | filename: `worker.${mode}.js`, 9 | path: path.join(__dirname, 'dist'), 10 | }, 11 | mode, 12 | resolve: { 13 | extensions: ['.ts', '.tsx', '.js'], 14 | plugins: [], 15 | }, 16 | module: { 17 | rules: [ 18 | { 19 | test: /\.tsx?$/, 20 | loader: 'ts-loader', 21 | options: { 22 | transpileOnly: true, 23 | }, 24 | }, 25 | ], 26 | }, 27 | } 28 | -------------------------------------------------------------------------------- /wrangler.toml: -------------------------------------------------------------------------------- 1 | name = "file" 2 | type = "webpack" 3 | account_id = "" 4 | workers_dev = true 5 | route = "" 6 | zone_id = "" 7 | webpack_config = "webpack.config.js" 8 | --------------------------------------------------------------------------------