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 Class Methods
new(app)
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# File lib/sinatra/show_exceptions.rb 15 def initialize(app) 16 @app = app 17 @template = ERB.new(TEMPLATE) 18 end
Public Instance Methods
call(env)
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# File lib/sinatra/show_exceptions.rb 20 def call(env) 21 @app.call(env) 22 rescue Exception => e 23 errors, env["rack.errors"] = env["rack.errors"], @@eats_errors 24 25 if prefers_plain_text?(env) 26 content_type = "text/plain" 27 body = [dump_exception(e)] 28 else 29 content_type = "text/html" 30 body = pretty(env, e) 31 end 32 33 env["rack.errors"] = errors 34 35 [500, 36 {"Content-Type" => content_type, 37 "Content-Length" => Rack::Utils.bytesize(body.join).to_s}, 38 body] 39 end
Private Instance Methods
frame_class(frame)
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# File lib/sinatra/show_exceptions.rb 48 def frame_class(frame) 49 if frame.filename =~ /lib\/sinatra.*\.rb/ 50 "framework" 51 elsif (defined?(Gem) && frame.filename.include?(Gem.dir)) || 52 frame.filename =~ /\/bin\/(\w+)$/ 53 "system" 54 else 55 "app" 56 end 57 end
prefers_plain_text?(env)
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# File lib/sinatra/show_exceptions.rb 43 def prefers_plain_text?(env) 44 !(Request.new(env).preferred_type("text/plain","text/html") == "text/html") && 45 [/curl/].index{|item| item =~ env["HTTP_USER_AGENT"]} 46 end