require 'rack/showexceptions' module Sinatra # 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. class ShowExceptions < Rack::ShowExceptions @@eats_errors = Object.new def @@eats_errors.flush(*) end def @@eats_errors.puts(*) end def initialize(app) @app = app @template = ERB.new(TEMPLATE) end 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" 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 private 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 def frame_class(frame) if frame.filename =~ /lib\/sinatra.*\.rb/ "framework" elsif (defined?(Gem) && frame.filename.include?(Gem.dir)) || frame.filename =~ /\/bin\/(\w+)$/ "system" else "app" end end TEMPLATE = <<-HTML # :nodoc: <%=h exception.class %> at <%=h path %>

BACKTRACE

(expand)

GET

<% if req.GET and not req.GET.empty? %> <% req.GET.sort_by { |k, v| k.to_s }.each { |key, val| %> <% } %>
Variable Value
<%=h key %>
<%=h val.inspect %>
<% else %>

No GET data.

<% end %>

POST

<% if req.POST and not req.POST.empty? %> <% req.POST.sort_by { |k, v| k.to_s }.each { |key, val| %> <% } %>
Variable Value
<%=h key %>
<%=h val.inspect %>
<% else %>

No POST data.

<% end %>
<% unless req.cookies.empty? %> <% req.cookies.each { |key, val| %> <% } %>
Variable Value
<%=h key %>
<%=h val.inspect %>
<% else %>

No cookie data.

<% end %>

Rack ENV

<% env.sort_by { |k, v| k.to_s }.each { |key, val| %> <% } %>
Variable Value
<%=h key %>
<%=h val %>

You're seeing this error because you have enabled the show_exceptions setting.

HTML end end