├── .gitignore ├── package.json ├── vercel.json ├── LICENSE ├── README.md ├── api └── rating.ts └── yarn.lock /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | .vercel 3 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "codeforces-rating", 3 | "author": "Baoshuo ", 4 | "license": "MIT", 5 | "dependencies": { 6 | "@vercel/node": "^1.14.0", 7 | "node-fetch": "2" 8 | }, 9 | "devDependencies": { 10 | "typescript": "^4.6.3" 11 | } 12 | } 13 | -------------------------------------------------------------------------------- /vercel.json: -------------------------------------------------------------------------------- 1 | { 2 | "routes": [ 3 | { 4 | "src": "/rating", 5 | "dest": "/api/rating.ts" 6 | }, 7 | { 8 | "src": "/", 9 | "status": 302, 10 | "headers": { 11 | "Location": "https://baoshuo.ren/services/codeforces-rating-badge/" 12 | } 13 | } 14 | ] 15 | } 16 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2022 Baoshuo 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Codeforces Rating Badge 2 | 3 | ## Demo 4 | 5 | ![](https://cfrating.baoshuo.dev/rating?username=baoshuo) 6 | 7 | ## Deploy 8 | 9 | [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Frenbaoshuo%2Fcodeforces-rating) 10 | 11 | ## Usage 12 | 13 | Just insert the link into your website as an image, like this: `` 14 | 15 | Do not forget to replace the default configuration with your own! 16 | 17 | --- 18 | 19 | Parameter list: 20 | 21 | | Name | Value | Required | Description | 22 | | -------- | ----------------------------------------------- | -------- | -------------------------------------------------- | 23 | | username | string | Yes | Your Codeforces username | 24 | | style | [shields.io styles](https://shields.io/#styles) | No | The style of the badge, default is `for-the-badge` | 25 | 26 | ## Author 27 | 28 | **Codeforces Rating Badge** © [Baoshuo](https://github.com/renbaoshuo), Released under the [MIT](./LICENSE) License.
29 | Authored and maintained by Baoshuo with help from contributors ([list](https://github.com/renbaoshuo/codeforces-rating/graphs/contributors)). 30 | 31 | > [Personal Website](https://baoshuo.ren) · [Blog](https://blog.baoshuo.ren) · GitHub [@renbaoshuo](https://github.com/renbaoshuo) · Twitter [@renbaoshuo](https://twitter.com/renbaoshuo) 32 | -------------------------------------------------------------------------------- /api/rating.ts: -------------------------------------------------------------------------------- 1 | import fetch from 'node-fetch'; 2 | import type { VercelRequest, VercelResponse } from '@vercel/node'; 3 | 4 | interface UserRatingInfo { 5 | rating: number; 6 | text: string; 7 | } 8 | 9 | function escape(username: string) { 10 | return encodeURIComponent(username.replace(/-/g, '--').replace(/_/g, '__')); 11 | } 12 | 13 | function getRatingColor(rating: number) { 14 | if (rating >= 2400) return 'ff0000'; 15 | if (rating >= 2100) return 'ff8c00'; 16 | if (rating >= 1900) return 'aa00aa'; 17 | if (rating >= 1600) return '0000ff'; 18 | if (rating >= 1400) return '03a89e'; 19 | if (rating >= 1200) return '008000'; 20 | return '808080'; 21 | } 22 | 23 | async function fetchData(username: string): Promise { 24 | const res = await fetch(`https://codeforces.com/api/user.info?handles=${username}`); 25 | 26 | if (!res.ok) return { rating: 0, text: 'N/A' }; 27 | 28 | const data = await res.json(); 29 | const { rank, rating } = data.result[0]; 30 | const text = rank && rating ? `${rank} ${rating}` : 'Unrated'; 31 | 32 | return { rating, text }; 33 | } 34 | 35 | async function getBadgeImage(username: string, data: UserRatingInfo, style: string) { 36 | const color = getRatingColor(data.rating); 37 | const escapedUsername = escape(username); 38 | const escapedRatingText = escape(data.text); 39 | 40 | const params = new URLSearchParams({ 41 | longCache: 'true', 42 | style, 43 | logo: 'codeforces', 44 | link: `https://codeforces.com/profile/${username}`, 45 | }); 46 | 47 | const res = await fetch( 48 | `https://img.shields.io/badge/${escapedUsername}-${escapedRatingText}-${color}.svg?${params.toString()}` 49 | ); 50 | 51 | if (!res.ok) throw 'error'; 52 | return await res.text(); 53 | } 54 | 55 | export default async (request: VercelRequest, response: VercelResponse) => { 56 | let { username = 'baoshuo', style = 'for-the-badge' } = request.query; 57 | 58 | if (Array.isArray(username)) username = username[0]; 59 | if (Array.isArray(style)) style = style[0]; 60 | 61 | const data = await fetchData(username as string).catch(() => ({ rating: 0, text: 'N/A' })); 62 | getBadgeImage(username as string, data, style as string) 63 | .then((data) => { 64 | response 65 | .status(200) 66 | .setHeader('Content-Type', 'image/svg+xml;charset=utf-8') 67 | .setHeader('Cache-Control', 'public, max-age=43200') // 43200s（12h） cache 68 | .send(data); 69 | }) 70 | .catch(() => { 71 | response.status(500).send('error'); 72 | }); 73 | }; 74 | -------------------------------------------------------------------------------- /yarn.lock: -------------------------------------------------------------------------------- 1 | # THIS IS AN AUTOGENERATED FILE. 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