What is the best way to design a HTTP request when somewhat complex parameters are needed?

Question

I have some web services that I am writing and I am trying to be as RESTful as possible. I am hosting these web services using a HTTPHandler running inside of IIS/ASP.NET/S

Answer 1

Consider supporting :
- GET requests with short query string
- POST requests with long query string into the body and X-HTTP-Method-Override: GET (https://en.wikipedia.org/wiki/List_of_HTTP_header_fields)

Beware not mixing "POST /orders" that is a bulk creation of new orders and "POST /orders" with a "X-HTTP-Method-Override: GET" that is a search of order.