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=ATVP         


        

Answer 1

Since the ASIN is always a sequence of 10 letters and/or numbers immediately after a slash, try this:

url.match("/([a-zA-Z0-9]{10})(?:[/?]|$)")

The additional (?:[/?]|$) after the ASIN is to ensure that only a full path segment is taken.