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I had a discussion with a colleague today around using query strings in REST URLs. Take these 2 examples:
1. http://localhost/findbyproductcode/4xxheua
2. http://localhost/findbyproductcode?productcode=4xxheua
My stance was the URLs should be designed as in example 1. This is cleaner and what I think is correct within REST. In my eyes you would be completely correct to return a 404 error from example 1 if the product code did not exist whereas with example 2 returning a 404 would be wrong as the page should exist. His stance was it didn't really matter and that they both do the same thing.
As neither of us were able to find concrete evidence (admittedly my search was not extensive) I would like to know other people's opinions on this.