Request URI too long via POST request - ruby-on-rails

Question

I'm sending a POST request via Net as such:
http = Net::HTTP.new(mixpanel_endpoint.host, mixpanel_endpoint.port)
request = Net::HTTP::Post.new(mixpanel_endpoint.request_uri)
http.request(request)
The issue is that the request_uri is over the max limit. It's a BASE64 encoded string.
Does anybody know what to do about this?
<Net::HTTPRequestURITooLong 414 Request URI Too Long readbody=true>

Answer 1

Net::HTTPRequestURITooLong is a 414 HTTP code from the server, you will need to change the request to conform to what the endpoint allows.
10.4.15 414 Request-URI Too Long
The server is refusing to service the request because the Request-URI
is longer than the server is willing to interpret. This rare condition
is only likely to occur when a client has improperly converted a POST
request to a GET request with long query information, when the client
has descended into a URI "black hole" of redirection (e.g., a
redirected URI prefix that points to a suffix of itself), or when the
server is under attack by a client attempting to exploit security
holes present in some servers using fixed-length buffers for reading
or manipulating the Request-URI.
reference: https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

Answer 2

Are you adding the data directly to the URL?
Try splitting out the endpoint URL from the data. For example:
Net::HTTP::Post.new(request_endpoint, "whatever_param_value=#{base64_encoded_data}")