scrape ASIN from amazon URL using javascript

Question

Assuming I have an Amazon product URL like so

http://www.amazon.com/Kindle-Wireless-Reading-Display-Generation/dp/B0015T963C/ref=amb_link_86123711_2?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-1&pf_rd_r=0AY9N5GXRYHCADJP5P0V&pf_rd_t=101&pf_rd_p=500528151&pf_rd_i=507846

How could I scrape just the ASIN using javascript?

Answer 1

So normally, they would look like this and the last part of the URL is the ASIN:

http://www.amazon.com/Kindle-Wireless-Reading-Display-Generation/dp/B0015T963C

So, try this code:

var url = "http://www.amazon.com/Kindle-Wireless-Reading-Display-Generation/dp/B0015T963C";

var regex = RegExp("http://www.amazon.com/([\\w-]+/)?(dp|gp/product)/(\\w+/)?(\\w{10})");

m = url.match(regex);

if (m) { 

    alert("ASIN=" + m[4]);

}