在不发送Ruby的情况下输出原始HTTP请求

Question

I am trying to setup a POST request to a rest api using ruby. What I want to do is to output the raw HTTP request without actually sending the request. I have looked at HTTParty and Net:HTTP, but it seems the only way to output the request is only once you send the request. So basically I want a convenient way for creating an HTTP request string without actually having to send it.

Answer 1

The HTTParty.get and similar methods methods are helper functions that wraps a lot of the internal complexity; you should just peek inside the method to find that HTTParty.get to find that inside it it just makes a call to perform_request :

def get(path, options={}, &block)
  perform_request Net::HTTP::Get, path, options, &block
end

and peeking into perform_request, we get that it just constructs a Request object and call perform on it :

def perform_request(http_method, path, options, &block) #:nodoc:
  options = default_options.merge(options)
  process_headers(options)
  process_cookies(options)
  Request.new(http_method, path, options).perform(&block)
end

You should take a look into the Request class.

Answer 2

Take a look at Typhoeus

request = Typhoeus::Request.new(
  "www.example.com",
  method: :post,
  body: "this is a request body",
  params: { field1: "a field" },
  headers: { Accept: "text/html" }
)

It allows you to create the request and then you can run it or not with

 request.run