Example of a flexible pattern for making HTTP requests with Ruby Net:HTTP

http_request_spec.rb

require "json"
require "net/http"
require "uri"

# The standard library Net::HTTP module is a bit convoluted, but here is an example of a flexible
# system for making different kinds of HTTP requests. To see some convenience methods you can
# consult the docs: https://ruby-doc.org/stdlib-2.5.5/libdoc/net/http/rdoc/Net/HTTP.html

class HttpConnection
  def get(url, params = nil)
    url = URI.parse(url.to_s)
    url.query = URI.encode_www_form(params) if params

    request = Net::HTTP::Get.new(url.to_s)

    http_request(request)
  end

  def post(url, params = nil)
    request = Net::HTTP::Post.new(url)
    request.body = URI.encode_www_form(params) if params

    http_request(request)
  end

  private def http_request(request)
    uri = URI.parse(request.path)
    Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == "https") { |http|
      http.request(request)
    }
  end
end

require "webmock/rspec"

RSpec.describe HttpConnection do
  describe "#get" do
    it "can make a GET request" do
      get_request = stub_request(:get, "httpbin.org/get").with(query: {"msg" => "Hello, world!"})

      subject.get("http://httpbin.org/get", msg: "Hello, world!")

      expect(get_request).to have_been_requested
    end

    it "returns a response object" do
      stub_request(:get, "httpbin.org/get").to_return(body: "Well, hello there!")

      response = subject.get("http://httpbin.org/get")

      expect(response.code).to eq "200"
      expect(response.body).to eq "Well, hello there!"
    end
  end

  describe "#post" do
    it "can make a POST request" do
      post_request = stub_request(:post, "httpbin.org/post").with(body: "msg=Hello%2C+world%21")

      subject.post("http://httpbin.org/post", msg: "Hello, world!")

      expect(post_request).to have_been_requested
    end
  end
end