Ruby send JSON request

Question

How do I send a JSON request in ruby? I have a JSON object but I dont think I can just do .send. Do I have to have javascript send the form?

Or can I use the net/http class in ruby?

With header - content type = json and body the json object?

Answer 1

I like this light weight http request client called `unirest'

gem install unirest

usage:

response = Unirest.post "http://httpbin.org/post", 
                        headers:{ "Accept" => "application/json" }, 
                        parameters:{ :age => 23, :foo => "bar" }

response.code # Status code
response.headers # Response headers
response.body # Parsed body
response.raw_body # Unparsed body

Answer 2

It's 2020 - nobody should be using Net::HTTP any more and all answers seem to be saying so, use a more high level gem such as Faraday - Github

---

That said, what I like to do is a wrapper around the HTTP api call,something that's called like

rv = Transporter::FaradayHttp[url, options]

because this allows me to fake HTTP calls without additional dependencies, ie:

  if InfoSig.env?(:test) && !(url.to_s =~ /localhost/)
    response_body = FakerForTests[url: url, options: options]

  else
    conn = Faraday::Connection.new url, connection_options

Where the faker looks something like this

I know there are HTTP mocking/stubbing frameworks, but at least when I researched last time they didn't allow me to validate requests efficiently and they were just for HTTP, not for example for raw TCP exchanges, this system allows me to have a unified framework for all API communication.

---

Assuming you just want to quick&dirty convert a hash to json, send the json to a remote host to test an API and parse response to ruby this is probably fastest way without involving additional gems:

JSON.load `curl -H 'Content-Type:application/json' -H 'Accept:application/json' -X POST localhost:3000/simple_api -d '#{message.to_json}'`

Hopefully this goes without saying, but don't use this in production.

Answer 3

uri = URI('https://myapp.com/api/v1/resource')
req = Net::HTTP::Post.new(uri, 'Content-Type' => 'application/json')
req.body = {param1: 'some value', param2: 'some other value'}.to_json
res = Net::HTTP.start(uri.hostname, uri.port) do |http|
  http.request(req)
end

Answer 4

HTTParty makes this a bit easier I think (and works with nested json etc, which didn't seem to work in other examples I've seen.

require 'httparty'
HTTParty.post("http://localhost:3000/api/v1/users", body: {user: {email: '[e-mail]', password: 'secret'}}).body