Request Headers

HTTP headers are name/value pairs that describe a request.

request_headers.rb

accept = 
headers = {
  "Host" => "example.com",
  "Accept" => accept,
  "User-Agent" => "egtry-demo"
}

normalized = headers.transform_keys { |key| key.downcase }
wants_json = normalized.fetch("accept").include?("json")
host = normalized.fetch("host")

puts "host=#{host}"
puts "accept=#{accept}"
puts "wants_json=#{wants_json}"
puts "header_count=#{headers.length}"

accept = 
headers = {
  "Host" => "example.com",
  "Accept" => accept,
  "User-Agent" => "egtry-demo"
}

normalized = headers.transform_keys { |key| key.downcase }
wants_json = normalized.fetch("accept").include?("json")
host = normalized.fetch("host")

puts "host=#{host}"
puts "accept=#{accept}"
puts "wants_json=#{wants_json}"
puts "header_count=#{headers.length}"

accept = 
headers = {
  "Host" => "example.com",
  "Accept" => accept,
  "User-Agent" => "egtry-demo"
}

normalized = headers.transform_keys { |key| key.downcase }
wants_json = normalized.fetch("accept").include?("json")
host = normalized.fetch("host")

puts "host=#{host}"
puts "accept=#{accept}"
puts "wants_json=#{wants_json}"
puts "header_count=#{headers.length}"

headers Normalizing header names makes lookup predictable even when callers use different capitalization.