require "jsonfeed"

url = "https://jsonfeed.org/feed.json"
r = HTTP::Client.get url
r.body

feed = JSONFeed.from_json(r.body)

pp feed

require "jsonfeed"

feed = JSONFeed::Feed.build(version: "https://jsonfeed.org/version/1", title: "Brent Simmons’s Microblog") do |feed|
  feed.user_comment = "This is a microblog feed. You can add this to your feed reader using the following URL: https://example.org/feed.json"
  feed.home_page_url = "https://example.org/"
  feed.feed_url = "https://example.org/feed.json"
  feed.author = JSONFeed::Author.build do |author|
    author.name = "Brent Simmons"
    author.url = "http://example.org/"
    author.avatar = "https://example.org/avatar.png"
  end
  feed.items << JSONFeed::Item.build(id: "2347259", url: "https://example.org/2347259") do |item|
    item.content_text = "Cats are neat. \n\nhttps://example.org/cats"
    item.date_published = "2016-02-09T14:22:00-07:00"
  end
end

puts feed.to_json

require "jsonfeed"

author = JSONFeed::Author.new(name: "Brent Simmons", url: "http://example.org/", avatar: "https://example.org/avatar.png")

feed = JSONFeed::Feed.new(version: "https://jsonfeed.org/version/1", title: "Brent Simmons’s Microblog", user_comment: "This is a microblog feed. You can add this to your feed reader using the following URL: https://example.org/feed.json", home_page_url: "https://example.org/", feed_url: "https://example.org/feed.json", author: author)

item = JSONFeed::Item.new(id: "2347259", url: "https://example.org/2347259", content_text: "Cats are neat. \n\nhttps://example.org/cats", date_published: "2016-02-09T14:22:00-07:00")

feed << item

puts feed.to_json