How to download a CRX file from the Chrome web store for a given ID?

Question

I\'d like to download the .crx file of an extension from webstore, I use fiddler to analyze the network request when I install an extension from webstore and got it.
For

Answer 1

For one of my extensions I had to download other CRXs automatically knowing only extension ID. I solved this by opening the following URL:

http://clients2.google.com/service/update2/crx?response=redirect&x=id%3D%26uc%26lang%3Den-US&prod=chrome

this page will forward you to that https://clients2.googleusercontent.com/crx/download/ address.

I don't remember already how I came up with that URL (it was either in page source somewhere or I used network sniffer), but it has been working great for me since last December, so it looks reliable.