Honeybadger for Crystal

Typical installation time: ~2 minutes

Hi there! You’ve found Honeybadger’s guide to Crystal exception and error tracking. Once installed, Honeybadger will automatically report errors in your Crystal application.

Getting started

Source Code

Installation

Update your shard.yml to include honeybadger:

dependencies:
  honeybadger:
    github: honeybadger-io/honeybadger-crystal

Configure your API key (available under Project Settings in Honeybadger):

Honeybadger.configure do |config|
  config.api_key = ENV["HONEYBADGER_API_KEY"]? || "PROJECT_API_KEY"
  config.environment = ENV["HONEYBADGER_ENVIRONMENT"]? || "production"
end

Reporting errors

Reporting errors in web frameworks

If you’re using a web framework, add the Honeybadger::Handler to the HTTP::Server stack:

HTTP::Server.new([Honeybadger::Handler.new]) do |context|
  # ...
end

Details for adding the handler to:

Reporting errors in Lucky Framework

1. Add the shard to shard.yml

2. Add Honeybadger::AuthenticHandler to your middleware stack:

   require "honeybadger"
   require "honeybadger/framework_handlers/authentic_handler.cr"
   
   def middleware : Array(HTTP::Handler)
     [
       # ...
       Lucky::ErrorHandler.new(action: Errors::Show),
       Honeybadger::AuthenticHandler.new,
       # ...
     ] of HTTP::Handler
   end

Read more about HTTP Handlers in Lucky here.

Reporting errors in Amber Framework

Read more about Pipelines in Amber here.

Reporting errors manually

For non-web contexts, or to manually report exceptions to Honeybadger, use Honeybadger.notify:

begin
  # run application code
  raise "OH NO!"
rescue exception
  Honeybadger.notify(exception)
end

Identifying users

Honeybadger can track what users have encountered each error. To identify the current user in error reports, add a user identifier and/or email address to Honeybadger’s context hash:

# Explicit context
Honeybadger.notify(exception, context: {
  "user_id" => user.id,
  "user_email" => "user@example.com"
})

# Managed context
Honeybadger.context(user_id: user.id)

For an example of identifying users in HTTP handlers, see demo/http_context.cr

Learn more about context data in Honeybadger

Sending events to Honeybadger Insights

You can send custom events to Honeybadger Insights to track important business metrics and user actions in your application:

# Send a simple event
Honeybadger.event(name: "user.signup")

# Send an event with properties
Honeybadger.event(
  name: "order.completed",
  total: 99.99,
  items: ["book", "shirt"],
  user_id: 123
)

Events are buffered and sent in batches to optimize performance. The buffer is flushed when either:

• 60 seconds have elapsed
• The buffer size exceeds 5MB

Events are sent asynchronously by default, so they won’t block your application’s execution.

Configuration

To set configuration options, use the Honeybadger.configure method:

Honeybadger.configure do |config|
  config.api_key = "PROJECT_API_KEY"
  config.environment = "production"
end

The following configuration options are available:

Name	Type	Default	Example	Environment Var
api_key	String	""	"badgers"	HONEYBADGER_API_KEY
endpoint	Path|String	"https://api.honeybadger.io"	"https://honeybadger.example.com/"	HONEYBADGER_ENDPOINT
hostname	String	The hostname of the current server.	"badger"	HONEYBADGER_HOSTNAME
project_root	String	The current working directory	"/path/to/project"	HONEYBADGER_PROJECT_ROOT
report_data	bool	true	false	HONEYBADGER_REPORT_DATA
development_environments	Array(String)	[“development”,“test”]		HONEYBADGER_DEVELOPMENT_ENVIRONMENTS
environment	String?	nil	"production"	HONEYBADGER_ENVIRONMENT
merge_log_context	bool	true	false	n/a

Documentation for context variables can be found in the Configuration class

Environment based config

Honeybadger can also be configured from environment variables. Each variable has a correlated environment variable and is prefixed with HONEYBADGER_. For example:

env HONEYBADGER_API_KEY=2468 ./server

All environment variables are documented in the configuration table above.

Version requirements

Crystal > 0.36.1