class Sinatra::ShowExceptions

Sinatra::ShowExceptions catches all exceptions raised from the app it wraps. It shows a useful backtrace with the sourcefile and clickable context, the whole Rack environment and the request data.

Be careful when you use this on public-facing sites as it could reveal information helpful to attackers.

Public Instance Methods

call(env) click to toggle source
# File lib/sinatra/show_exceptions.rb, line 24
def call(env)
  @app.call(env)
rescue Exception => e
  errors, env["rack.errors"] = env["rack.errors"], @@eats_errors

  if prefers_plain_text?(env)
    content_type = "text/plain"
    exception = dump_exception(e)
  else
    content_type = "text/html"
    exception = pretty(env, e)
  end

  env["rack.errors"] = errors

  # Post 893a2c50 in rack/rack, the #pretty method above, implemented in
  # Rack::ShowExceptions, returns a String instead of an array.
  body = Array(exception)

  [
    500,
    {
      "Content-Type" => content_type,
      "Content-Length" => Rack::Utils.bytesize(body.join).to_s
    },
    body
  ]
end

Public Class Methods

new(app) click to toggle source
# File lib/sinatra/show_exceptions.rb, line 19
def initialize(app)
  @app      = app
  @template = ERB.new(TEMPLATE)
end