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Compression json in nodejs

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[前端(javascript) 所属分类 前端(javascript) | 发布者 店小二04 | 时间 2019 | 作者 红领巾 ] 0人收藏点击收藏

I have a server in nodejs written using connect. I am exposing some data as json. I have to compress the data before sending. I used the compress function in connect but I am not sure how to check the data if its compressed or not. Below is my code:

var connect = require('connect') , http = require('http'); var app = connect() .use(connect.compress(console.log("I have compressed data"))) .use(function(req, res){ res.setHeader('Content-Type', 'application/json'); //res.end("store_id: 'S3000981'"); res.end('{"store_id": "S3000990"}'); }); http.createServer(app).listen(3000);

Any idea regarding this will be really helpful.

Problem courtesy of: Amanda G

Solution

Run your server, and try this:

curl -H 'Accept-Encoding: gzip' -v localhost:3000

If you see the following appear, the response is compressed:

< Content-Encoding: gzip

Also, this doesn't do what you think it will, and might have side-effects:

.use(connect.compress(console.log("I have compressed data")))

If you want to log a message from your server when the response data is compressed, try this instead:

.use(connect.compress()) .use(function(req, res, next) { res.on('header', function() { var encoding = res.getHeader('Content-Encoding') || ''; if (encoding.indexOf('gzip') != -1 || encoding.indexOf('deflate') != -1) { console.log("I have compressed data"); } }); next(); })

Solution courtesy of: robertklep

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