request_id

Middleware for generates / pick up a unique request ID for Crystal servers.

This module set response HTTP Header like this:

X-Request-ID: 753a468b-4179-40c4-bb58-ff508cb39d67

Installation

Add this to your application's shard.yml:

dependencies:
  request_id:
    github: SuperPaintman/request-id

Usage

With pure Crystal server

require "request_id"
require "http/server"

server = HTTP::Server.new("0.0.0.0", 8080,
  [
    RequestID::Handler.new
  ]) do |context|
  context.response.content_type = "text/plain"
  context.response.print "Hello request id!"
end

server.listen

With Kemal

require "request_id"
require "kemal"

add_handler RequestID::Handler.new

get "/" do |env|
  "Hello request id!"
end

Kemal.run

Custom Generator

By default: uuid

require "request_id"
require "http/server"

class CustomRequestIDHandler < RequestID::Handler
  def generator
    "custom_request_id_generator"
  end
end

server = HTTP::Server.new("0.0.0.0", 8080,
  [
    CustomRequestIDHandler.new
  ]) do |context|
  context.response.content_type = "text/plain"
  context.response.print "Hello request id!"
end

server.listen

Examples

Random ID

curl -I localhost:8080
# HTTP/1.1 200 OK
# X-Request-ID: 5e3df631-85e6-4eaf-bb1c-68375291332e

Set ID via Header

curl -I -H 'X-Request-ID:4ce4089d-e01e-4c7f-b35c-2ca383c7abf5' localhost:8080
# HTTP/1.1 200 OK
# X-Request-ID: 4ce4089d-e01e-4c7f-b35c-2ca383c7abf5

Test

crystal spec

Contributing

1. Fork it (https://github.com/SuperPaintman/request-id/fork)
2. Create your feature branch (git checkout -b feature/<feature_name>)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin feature/<feature_name>)
5. Create a new Pull Request

Contributors

• SuperPaintman SuperPaintman - creator, maintainer

API

Docs

Changelog

Changelog

License

MIT