Net::HTTP error sending GET request with parameters

If you're getting trouble with Net::HTTP#send_request when sending a GET request with parameters, one possible cause is that parameters must be part of path as a query string, and not as data (3rd parameter of #send_request).

For example (assuming that parameters is not empty), instead of

http = Net::HTTP.new('server.com')
http.send_request('GET', path, parameters, headers)

try:

http = Net::HTTP.new('server.com')
http.send_request('GET', path + '?' + parameters, '', headers)