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 17 def initialize(app) 18 @app = app 19 end
Public Instance Methods
call(env)
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# File lib/sinatra/show_exceptions.rb 21 def call(env) 22 @app.call(env) 23 rescue Exception => e 24 errors, env["rack.errors"] = env["rack.errors"], @@eats_errors 25 26 if prefers_plain_text?(env) 27 content_type = "text/plain" 28 body = dump_exception(e) 29 else 30 content_type = "text/html" 31 body = pretty(env, e) 32 end 33 34 env["rack.errors"] = errors 35 36 [ 37 500, 38 { 39 "Content-Type" => content_type, 40 "Content-Length" => body.bytesize.to_s 41 }, 42 [body] 43 ] 44 end
template()
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# File lib/sinatra/show_exceptions.rb 46 def template 47 TEMPLATE 48 end
Private Instance Methods
bad_request?(e)
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# File lib/sinatra/show_exceptions.rb 52 def bad_request?(e) 53 Sinatra::BadRequest === e 54 end
frame_class(frame)
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# File lib/sinatra/show_exceptions.rb 61 def frame_class(frame) 62 if frame.filename =~ %r{lib/sinatra.*\.rb} 63 "framework" 64 elsif (defined?(Gem) && frame.filename.include?(Gem.dir)) || 65 frame.filename =~ %r{/bin/(\w+)\z} 66 "system" 67 else 68 "app" 69 end 70 end
prefers_plain_text?(env)
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# File lib/sinatra/show_exceptions.rb 56 def prefers_plain_text?(env) 57 !(Request.new(env).preferred_type("text/plain","text/html") == "text/html") && 58 [/curl/].index { |item| item =~ env["HTTP_USER_AGENT"] } 59 end