fast_curl

gem 'fast_curl'

results = FastCurl.get([
  { url: "https://api.example.com/users" },
  { url: "https://api.example.com/posts" }
], connections: 20, timeout: 30)

results.each do |index, response|
  puts "#{index}: #{response[:status]} — #{response[:body]}"
end

FastCurl.post([
  {
    url: "https://api.example.com/users",
    headers: { "Authorization" => "Bearer token" },
    body: { name: "John" }
  }
])

result = FastCurl.first_get([
  { url: "https://mirror1.example.com/file" },
  { url: "https://mirror2.example.com/file" },
  { url: "https://mirror3.example.com/file" }
], count: 1)

FastCurl.stream_get(urls, connections: 50) do |index, response|
  puts "Got response #{index}: #{response[:status]}"
end

require "async"

Async do
  # fast_curl detects the fiber scheduler and yields
  # to other fibers during I/O instead of blocking
  results = FastCurl.get(urls, connections: 20)
end

[index, {
  status: 200,             # HTTP status code (0 on error)
  headers: { "Key" => "Value" },
  body: "response body"
}]