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Merge pull request #26 from GoogleCloudPlatform/fix-memcached
Cleaned up memcached example and added tests.
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@@ -34,6 +34,7 @@ cache: | |
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| services: | ||
| - redis-server | ||
| - memcached | ||
| - docker | ||
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| env: | ||
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| # Express + Memcached Sessions -> Google App Engine | ||
| ## Express.js + Memcached Sessions on Google App Engine | ||
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| This is a simple guide to using memcached for session state while running [expressjs](http://expressjs.com/) on Google App Engine. Each Google App Engine application comes with a memcached service instance, which can be reached with a standard memcached driver at `memcache:11211`. | ||
| This is a simple guide to using memcached for session state while running | ||
| [Express.js](http://expressjs.com/) on Google App Engine. Each Google App Engine | ||
| application comes with a memcached service instance, which can be reached with a | ||
| standard memcached driver at `memcache:11211`. This sample uses the | ||
| [connect-memcached](https://github.com/balor/connect-memcached) module to store | ||
| session data in memcached. | ||
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| 1. [Create a new Express app](http://expressjs.com/starter/generator.html) | ||
| ## Clone the Express.js + Memcached Sessions app | ||
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| 2. Create an `app.yaml` in the root of your application with the following contents: | ||
| If you haven't already, copy the repository to your local machine by entering | ||
| the following command in your terminal window: | ||
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| ```yaml | ||
| runtime: nodejs | ||
| vm: true | ||
| env_variables: | ||
| PORT: 8080 | ||
| MEMCACHE_URL: memcache:11211 | ||
| ``` | ||
| ``` | ||
| $ git clone https://github.com/GoogleCloudPlatform/nodejs-docs-samples.git | ||
| $ cd nodejs-docs-samples/appengine/express-memcached-session | ||
| ``` | ||
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| Alternatively, you can [download the sample][download] as a zip and extract it. | ||
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| ## Run the app on your local computer | ||
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| 1. Install dependencies. Enter the following command: | ||
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| Notice the MEMCACHE_URL environment variable - this is where you can reach your standard memcached cluster across instances. | ||
| 3. Use the [connect-memcached](https://github.com/balor/connect-memcached) module. Run `npm install --save connect-memcached`, and add the following to your server.js or app.js: | ||
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| ```js | ||
| var MemcachedStore = require('connect-memcached')(session); | ||
| ... | ||
| app.use(session({ | ||
| secret: 'appengineFTW', | ||
| key: 'test', | ||
| proxy: 'true', | ||
| store: new MemcachedStore({ | ||
| hosts: [process.env.MEMCACHE_URL || '127.0.0.1:11211'] | ||
| }) | ||
| })); | ||
| ``` | ||
| 4. In your express route handlers, you can now safely use `req.session.*` across multiple nodejs instances: | ||
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| ```js | ||
| app.get('/', function(req, res){ | ||
| publicIp.v4(function (err, ip) { | ||
| res.write("<div>" + ip + "</div>"); | ||
| if(req.session.views) { | ||
| ++req.session.views; | ||
| } else { | ||
| req.session.views = 1; | ||
| } | ||
| res.end('Viewed <strong>' + req.session.views + '</strong> times.'); | ||
| }); | ||
| }); | ||
| $ npm install | ||
| ``` | ||
| 5. To test the sample locally, you can install memcached. | ||
| - OSX + [Brew](http://brew.sh/): `brew install memcached` | ||
| - Windows + [Chocolatey](https://chocolatey.org/packages/memcached): `choco install memcached` | ||
| 2. Run the start script. | ||
| Run memcached on localhost:11211 by running `memcached` | ||
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| ```` | ||
| $ npm start | ||
| ``` | ||
| 6. Deploy your app. For convenience, you can use an npm script to run the command. Modify your `package.json` to include: | ||
| 3. In your web browser, enter the following address: | ||
| ```js | ||
| "scripts": { | ||
| "start": "node server.js", | ||
| "deploy": "gcloud preview app deploy app.yaml --set-default --project [project id]" | ||
| } | ||
| ``` | ||
| $ http://localhost:8080 | ||
| ``` | ||
| You can see the sample app displayed in the page. This page was delivered by the | ||
| Express.js web server running on your computer. | ||
| In your terminal window, press Ctrl+C to exit the web server. | ||
| ## Deploy the app to Google Cloud Platform | ||
| In your terminal window, enter the following command to deploy the sample: | ||
| ``` | ||
| $ gcloud preview app deploy app.yaml --promote | ||
| ``` | ||
| ### See the app run in the cloud | ||
| In your web browser, enter the following address: | ||
| ``` | ||
| https://<your-project-id>.appspot.com | ||
| ``` | ||
| For convenience, you can use an npm script to run the gcloud command. Add these lines to your package.json file: | ||
| ``` | ||
| "scripts": { | ||
| "start": "node server.js", | ||
| "deploy": "gcloud preview app deploy app.yaml --promote --project <your-project-id>" | ||
| } | ||
| ``` | ||
| At the terminal you can now run the following command to deploy your application: | ||
| ``` | ||
| $ npm run deploy | ||
| ``` | ||
| ## Configuration | ||
| Every Managed VMs application requires an app.yaml file to describe its deployment configuration. | ||
| ```yaml | ||
| runtime: nodejs | ||
| vm: true | ||
| env_variables: | ||
| PORT: 8080 | ||
| MEMCACHE_URL: memcache:11211 | ||
| ``` | ||
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| Notice the `MEMCACHE_URL` environment variable–this is where you can reach your | ||
| standard memcached cluster across instances. | ||
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| At the terminal you can now run `npm run deploy` to deploy your application. | ||
| [download]: https://github.com/GoogleCloudPlatform/nodejs-docs-samples/archive/master.zip |
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| # limitations under the License. | ||
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| runtime: nodejs | ||
| api_version: 1 | ||
| vm: true | ||
| env_variables: | ||
| PORT: 8080 | ||
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| // Copyright 2015, Google, Inc. | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| 'use strict'; | ||
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| var request = require('supertest'); | ||
| var app = require('../../appengine/express-memcached-session/server.js'); | ||
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| describe('express-memcached-session', function () { | ||
| it('should return 200', function (done) { | ||
| request(app) | ||
| .get('/') | ||
| .expect(200) | ||
| .end(done); | ||
| }); | ||
| }); |