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, line 17 def initialize(app) @app = app end
Public Instance Methods
call(env)
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# File lib/sinatra/show_exceptions.rb, line 21 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" => body.join.bytesize.to_s }, body ] end
Private Instance Methods
bad_request?(e)
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# File lib/sinatra/show_exceptions.rb, line 52 def bad_request?(e) Sinatra::BadRequest === e end
frame_class(frame)
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# File lib/sinatra/show_exceptions.rb, line 61 def frame_class(frame) if frame.filename =~ %r{lib/sinatra.*\.rb} "framework" elsif (defined?(Gem) && frame.filename.include?(Gem.dir)) || frame.filename =~ %r{/bin/(\w+)\z} "system" else "app" end end
prefers_plain_text?(env)
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# File lib/sinatra/show_exceptions.rb, line 56 def prefers_plain_text?(env) !(Request.new(env).preferred_type("text/plain","text/html") == "text/html") && [/curl/].index { |item| item =~ env["HTTP_USER_AGENT"] } end