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.
# File lib/sinatra/showexceptions.rb, line 15 def initialize(app) @app = app @template = ERB.new(TEMPLATE) end
# File lib/sinatra/showexceptions.rb, line 20 def call(env) @app.call(env) rescue Exception => e errors, env["rack.errors"] = env["rack.errors"], @@eats_errors if respond_to?(:prefers_plain_text?) and prefers_plain_text?(env) content_type = "text/plain" body = [dump_exception(e)] else content_type = "text/html" body = pretty(env, e) end env["rack.errors"] = errors [500, {"Content-Type" => content_type, "Content-Length" => Rack::Utils.bytesize(body.join).to_s}, body] end