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use express-cluster for drop-in cluster support

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Jeffrey Sun 2017-05-02 14:05:02 -07:00
parent 1a42d9dbc1
commit 7c34463cc4
2 changed files with 24 additions and 19 deletions
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1
package.json
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@ -20,6 +20,7 @@
"canvas": "^1.6.2", "canvas": "^1.6.2",
"chance": "^1.0.4", "chance": "^1.0.4",
"express": "^4.14.0", "express": "^4.14.0",
"express-cluster": "0.0.4",
"newrelic": "^1.35.1", "newrelic": "^1.35.1",
"node-gyp": "^3.4.0", "node-gyp": "^3.4.0",
"sanitize-filename": "^1.6.1", "sanitize-filename": "^1.6.1",

42
server.js
View file

@ -5,6 +5,7 @@ try {
} }
const express = require('express'); const express = require('express');
const cluster = require('express-cluster');
const uuid = require('uuid/v4'); const uuid = require('uuid/v4');
const sanitize = require('sanitize-filename'); const sanitize = require('sanitize-filename');
const Canvas = require('canvas'); const Canvas = require('canvas');
@ -20,26 +21,29 @@ function composeImage(width, height, seed) {
return canvas; return canvas;
}; };
const app = express();
const cacheTimeout = 60 * 60 * 24 * 30; const cacheTimeout = 60 * 60 * 24 * 30;
app.get('/healthcheck', (req, res) => { cluster((worker) => {
res.status(200).end(); const app = express();
});
app.get('/:width/:seed', (req, res) => { app.get('/healthcheck', (req, res) => {
let width = parseInt(req.params.width) || 400; res.status(200).end();
if (width > 400) width = 400; });
const seed = sanitize(req.params.seed) || uuid();
const canvas = composeImage(width, width, seed);
const buffer = canvas.toBuffer();
res.set('Cache-Control', 'max-age=' + cacheTimeout);
res.set('Content-length', buffer.length);
res.type('png');
res.end(buffer, 'binary');
});
app.listen(process.env.PORT || 3000, () => { app.get('/:width/:seed', (req, res) => {
console.log('listening on http://localhost:3000'); let width = parseInt(req.params.width) || 400;
}); if (width > 400) width = 400;
const seed = sanitize(req.params.seed) || uuid();
const canvas = composeImage(width, width, seed);
const buffer = canvas.toBuffer();
res.set('Cache-Control', 'max-age=' + cacheTimeout);
res.set('Content-length', buffer.length);
res.type('png');
res.end(buffer, 'binary');
});
activePort = process.env.PORT || 3000;
app.listen(activePort, () => {
console.log('worker ' + worker.id + ' is listening on port ' + activePort);
});
})