From d25fba89d49bf741de6d7dfa857afcc61468b815 Mon Sep 17 00:00:00 2001 From: Genadi Samokovarov Date: Wed, 24 Feb 2016 23:19:57 +0200 Subject: Introduce ActionDispatch::DebugExceptions interceptors Plugins interacting with the exceptions caught and displayed by ActionDispatch::DebugExceptions currently have to monkey patch it to get the much needed exception for their calculation. With DebugExceptions.register_interceptor, plugin authors can hook into DebugExceptions and process the exception, before being rendered. They can store it into the request and process it on the way back of the middleware chain execution or act on it straight in the interceptor. The interceptors can be play blocks, procs, lambdas or any object that responds to `#call`. --- .../action_dispatch/middleware/debug_exceptions.rb | 24 +++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) (limited to 'actionpack/lib/action_dispatch') diff --git a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb index 511306eb0e..33edad8bd9 100644 --- a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb +++ b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb @@ -50,10 +50,18 @@ module ActionDispatch end end - def initialize(app, routes_app = nil, response_format = :default) + cattr_reader :interceptors, instance_accessor: false, default: [] + + def self.register_interceptor(object = nil, &block) + interceptor = object || block + interceptors << interceptor + end + + def initialize(app, routes_app = nil, response_format = :default, interceptors = self.class.interceptors) @app = app @routes_app = routes_app @response_format = response_format + @interceptors = interceptors end def call(env) @@ -67,12 +75,26 @@ module ActionDispatch response rescue Exception => exception + invoke_interceptors(request, exception) raise exception unless request.show_exceptions? render_exception(request, exception) end private + def invoke_interceptors(request, exception) + backtrace_cleaner = request.get_header("action_dispatch.backtrace_cleaner") + wrapper = ExceptionWrapper.new(backtrace_cleaner, exception) + + @interceptors.each do |interceptor| + begin + interceptor.call(request, exception) + rescue Exception + log_error(request, wrapper) + end + end + end + def render_exception(request, exception) backtrace_cleaner = request.get_header("action_dispatch.backtrace_cleaner") wrapper = ExceptionWrapper.new(backtrace_cleaner, exception) -- cgit v1.2.3