How can I find out if Heroku is sending gzip answers?

Question

I am making an iPhone application that requests JSON from Heroku.

• Am I getting a gzip response? And, does the iPhone automatically unzip gzip answers, or do you need to program this? I use NSURLConnectionasynchronously (with the delegate protocol) as described in the Xcode docs.

  When I do this:

  curl -I http://acani.heroku.com/users/4c96ee4f1467281352000049/1234/50/50
  

  I get:

  HTTP/1.1 200 OK
  Server: nginx/0.7.67
  Date: Sun, 17 Oct 2010 16:27:25 GMT
  Content-Type: application/json
  Connection: keep-alive
  Content-Length: 11532
  X-Varnish: 2314841869
  Age: 0
  Via: 1.1 varnish
  

• I also use Zimt WebSocket code with AsyncSocket for chat. Chat Server - Node.js. Do I gzipping every chat message? Or is this done automatically?

• Interestingly, to reduce bandwidth, gzip your tweets on Twitter (using JavaScript on the Internet or Objective-C on iPhone) before they are sent to Twitter?

Thank!

Matt

Answer 1

, , Content-Encoding. gzip, compress, deflate. . RFC 2616. 3.5 .