├── .gitignore ├── LICENSE ├── README.md ├── index.html ├── package.json └── server.js /.gitignore: -------------------------------------------------------------------------------- 1 | # Logs 2 | logs 3 | *.log 4 | npm-debug.log* 5 | 6 | # Runtime data 7 | pids 8 | *.pid 9 | *.seed 10 | 11 | # Directory for instrumented libs generated by jscoverage/JSCover 12 | lib-cov 13 | 14 | # Coverage directory used by tools like istanbul 15 | coverage 16 | 17 | # nyc test coverage 18 | .nyc_output 19 | 20 | # Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files) 21 | .grunt 22 | 23 | # node-waf configuration 24 | .lock-wscript 25 | 26 | # Compiled binary addons (http://nodejs.org/api/addons.html) 27 | build/Release 28 | 29 | # Dependency directories 30 | node_modules 31 | jspm_packages 32 | 33 | # Optional npm cache directory 34 | .npm 35 | 36 | # Optional REPL history 37 | .node_repl_history 38 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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In such case, this License incorporates 235 | the limitation as if written in the body of this License. 236 | 237 | 9. The Free Software Foundation may publish revised and/or new versions 238 | of the General Public License from time to time. Such new versions will 239 | be similar in spirit to the present version, but may differ in detail to 240 | address new problems or concerns. 241 | 242 | Each version is given a distinguishing version number. If the Program 243 | specifies a version number of this License which applies to it and "any 244 | later version", you have the option of following the terms and conditions 245 | either of that version or of any later version published by the Free 246 | Software Foundation. If the Program does not specify a version number of 247 | this License, you may choose any version ever published by the Free Software 248 | Foundation. 249 | 250 | 10. If you wish to incorporate parts of the Program into other free 251 | programs whose distribution conditions are different, write to the author 252 | to ask for permission. For software which is copyrighted by the Free 253 | Software Foundation, write to the Free Software Foundation; we sometimes 254 | make exceptions for this. Our decision will be guided by the two goals 255 | of preserving the free status of all derivatives of our free software and 256 | of promoting the sharing and reuse of software generally. 257 | 258 | NO WARRANTY 259 | 260 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 261 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 262 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 263 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 264 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 265 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 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It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | {description} 294 | Copyright (C) {year} {fullname} 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | {signature of Ty Coon}, 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # cors-demo 2 | Demo server/client for CORS cookies, preflights and redirects. 3 | 4 | ## Get Running 5 | 6 | 1. `npm run install` 7 | 2. `npm start` 8 | 3. Open the given URL. 9 | 10 | ## Tutorials 11 | 12 | 1. 13 | 2. 14 | 3. 15 | -------------------------------------------------------------------------------- /index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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Fails if Access-Control-Allow-Origin Not Set

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Success if Access-Control-Allow-Origin Set to Wildcard

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Non-Simple Request

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Fails to Send Cookie when Access-Control-Allow-Origin set to Wildcard

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30 |

Fails when Access-Control-Allow-Credentials Not Set

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Success to Send Cookie when Access-Control-Allow-Origin set specificly

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Redirect Simple Request

41 | 42 |
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Redirect Simple Request Twice

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Redirect Non-Simple Request

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53 | 54 | 137 | 138 | 139 | 140 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "cors-demo", 3 | "version": "1.0.0", 4 | "description": "", 5 | "main": "index.js", 6 | "scripts": { 7 | "start": "node server.js", 8 | "test": "echo \"Error: no test specified\" && exit 1" 9 | }, 10 | "repository": { 11 | "type": "git", 12 | "url": "git+https://github.com/harttle/cors-demo.git" 13 | }, 14 | "author": "harttle ", 15 | "license": "GPLv2", 16 | "bugs": { 17 | "url": "https://github.com/harttle/cors-demo/issues" 18 | }, 19 | "homepage": "https://github.com/harttle/cors-demo#readme", 20 | "dependencies": { 21 | "express": "^4.14.0", 22 | "on-headers": "^1.0.1" 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /server.js: -------------------------------------------------------------------------------- 1 | const express = require('express'); 2 | const fs = require('fs'); 3 | const onHeaders = require('on-headers'); 4 | 5 | var app = express(); 6 | 7 | // logger 8 | app.use((req, res, next) => { 9 | console.log('Request:'); 10 | console.log(req.method, req.originalUrl, req.get('host')); 11 | console.log(req.headers); 12 | console.log(); 13 | onHeaders(res, x => { 14 | console.log('Response:'); 15 | console.log(res.statusCode); 16 | console.log(res._headers); 17 | console.log(); 18 | }); 19 | next(); 20 | }); 21 | 22 | app.get('/', (req, res) => { 23 | fs.readFile('index.html', (err, content) => { 24 | res.status(200).end(content); 25 | }); 26 | }); 27 | 28 | app.get('/access-control-allow-origin-not-set', (req, res) => { 29 | res.status(200).end('you can never retrieve this'); 30 | }); 31 | 32 | app.get('/access-control-allow-origin-wildcard', (req, res) => { 33 | res.set({ 34 | 'Access-Control-Allow-Origin': '*' 35 | }); 36 | res.status(200).end('contents here'); 37 | }); 38 | 39 | app.options('/access-control-allow-origin-wildcard', (req, res) => { 40 | res.set({ 41 | 'Access-Control-Allow-Origin': '*', 42 | 'Access-Control-Allow-Headers': req.get('access-control-request-headers') 43 | }); 44 | res.status(200).end(); 45 | }); 46 | 47 | app.get('/wildcard-allow-origin-with-credentials', (req, res) => { 48 | res.set({ 49 | 'Access-Control-Allow-Origin': '*', 50 | 'Access-Control-Allow-Credentials': true 51 | }); 52 | res.status(200).end('you can never retrieve this'); 53 | }); 54 | 55 | app.get('/allow-credentials-not-set', (req, res) => { 56 | res.set({ 57 | 'Access-Control-Allow-Origin': '*' //req.get('origin') 58 | }); 59 | res.status(200).end('you can never retrieve this'); 60 | }); 61 | 62 | app.get('/specific-allow-origin-with-credentials', (req, res) => { 63 | res.set({ 64 | 'Access-Control-Allow-Origin': 'http://localhost:4001', 65 | 'Access-Control-Allow-Credentials': true 66 | }); 67 | res.status(200).end('I got your cookie: ' + req.headers.cookie); 68 | }); 69 | 70 | app.get('/redirect-to-redirect', (req, res) => { 71 | res.set({ 72 | 'Access-Control-Allow-Origin': 'http://localhost:4001', 73 | 'Location': 'http://localhost:4001/redirect' 74 | }); 75 | res.status(303).end(); 76 | }); 77 | 78 | app.get('/redirect', (req, res) => { 79 | res.set({ 80 | 'Access-Control-Allow-Origin': '*', 81 | 'Location': 'http://localhost:4001/access-control-allow-origin-wildcard', 82 | 'Access-Control-Allow-Headers': 'x-foo, DNT' 83 | }); 84 | res.status(303).end(); 85 | }); 86 | 87 | app.options('/redirect', (req, res) => { 88 | res.set({ 89 | 'Access-Control-Allow-Origin': '*', 90 | 'Access-Control-Allow-Headers': 'x-foo, DNT' 91 | }); 92 | res.status(200).end(); 93 | }); 94 | 95 | app.listen(4001, () => console.log('listening to 4001')); 96 | app.listen(4002, () => console.log('listening to 4002')); 97 | app.listen(4003, () => console.log('listening to 4003')); 98 | 99 | console.log('Open http://localhost:4001'); 100 | console.log(); 101 | --------------------------------------------------------------------------------