diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/middleware/exception_wrapper.rb')
| -rw-r--r-- | actionpack/lib/action_dispatch/middleware/exception_wrapper.rb | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb new file mode 100644 index 0000000000..fb2b2bd3b0 --- /dev/null +++ b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb @@ -0,0 +1,176 @@ +# frozen_string_literal: true + +require "active_support/core_ext/module/attribute_accessors" +require "rack/utils" + +module ActionDispatch + class ExceptionWrapper + cattr_accessor :rescue_responses, default: Hash.new(:internal_server_error).merge!( + "ActionController::RoutingError" => :not_found, + "AbstractController::ActionNotFound" => :not_found, + "ActionController::MethodNotAllowed" => :method_not_allowed, + "ActionController::UnknownHttpMethod" => :method_not_allowed, + "ActionController::NotImplemented" => :not_implemented, + "ActionController::UnknownFormat" => :not_acceptable, + "ActionController::MissingExactTemplate" => :not_acceptable, + "ActionController::InvalidAuthenticityToken" => :unprocessable_entity, + "ActionController::InvalidCrossOriginRequest" => :unprocessable_entity, + "ActionDispatch::Http::Parameters::ParseError" => :bad_request, + "ActionController::BadRequest" => :bad_request, + "ActionController::ParameterMissing" => :bad_request, + "Rack::QueryParser::ParameterTypeError" => :bad_request, + "Rack::QueryParser::InvalidParameterError" => :bad_request + ) + + cattr_accessor :rescue_templates, default: Hash.new("diagnostics").merge!( + "ActionView::MissingTemplate" => "missing_template", + "ActionController::RoutingError" => "routing_error", + "AbstractController::ActionNotFound" => "unknown_action", + "ActiveRecord::StatementInvalid" => "invalid_statement", + "ActionView::Template::Error" => "template_error", + "ActionController::MissingExactTemplate" => "missing_exact_template", + ) + + attr_reader :backtrace_cleaner, :exception, :wrapped_causes, :line_number, :file + + def initialize(backtrace_cleaner, exception) + @backtrace_cleaner = backtrace_cleaner + @exception = original_exception(exception) + @wrapped_causes = wrapped_causes_for(exception, backtrace_cleaner) + + expand_backtrace if exception.is_a?(SyntaxError) || exception.cause.is_a?(SyntaxError) + end + + def rescue_template + @@rescue_templates[@exception.class.name] + end + + def status_code + self.class.status_code_for_exception(@exception.class.name) + end + + def application_trace + clean_backtrace(:silent) + end + + def framework_trace + clean_backtrace(:noise) + end + + def full_trace + clean_backtrace(:all) + end + + def traces + application_trace_with_ids = [] + framework_trace_with_ids = [] + full_trace_with_ids = [] + + full_trace.each_with_index do |trace, idx| + trace_with_id = { + exception_object_id: @exception.object_id, + id: idx, + trace: trace + } + + if application_trace.include?(trace) + application_trace_with_ids << trace_with_id + else + framework_trace_with_ids << trace_with_id + end + + full_trace_with_ids << trace_with_id + end + + { + "Application Trace" => application_trace_with_ids, + "Framework Trace" => framework_trace_with_ids, + "Full Trace" => full_trace_with_ids + } + end + + def self.status_code_for_exception(class_name) + Rack::Utils.status_code(@@rescue_responses[class_name]) + end + + def source_extracts + backtrace.map do |trace| + file, line_number = extract_file_and_line_number(trace) + + { + code: source_fragment(file, line_number), + line_number: line_number + } + end + end + + def trace_to_show + if traces["Application Trace"].empty? && rescue_template != "routing_error" + "Full Trace" + else + "Application Trace" + end + end + + def source_to_show_id + (traces[trace_to_show].first || {})[:id] + end + + private + + def backtrace + Array(@exception.backtrace) + end + + def original_exception(exception) + if @@rescue_responses.has_key?(exception.cause.class.name) + exception.cause + else + exception + end + end + + def causes_for(exception) + return enum_for(__method__, exception) unless block_given? + + yield exception while exception = exception.cause + end + + def wrapped_causes_for(exception, backtrace_cleaner) + causes_for(exception).map { |cause| self.class.new(backtrace_cleaner, cause) } + end + + def clean_backtrace(*args) + if backtrace_cleaner + backtrace_cleaner.clean(backtrace, *args) + else + backtrace + end + end + + def source_fragment(path, line) + return unless Rails.respond_to?(:root) && Rails.root + full_path = Rails.root.join(path) + if File.exist?(full_path) + File.open(full_path, "r") do |file| + start = [line - 3, 0].max + lines = file.each_line.drop(start).take(6) + Hash[*(start + 1..(lines.count + start)).zip(lines).flatten] + end + end + end + + def extract_file_and_line_number(trace) + # Split by the first colon followed by some digits, which works for both + # Windows and Unix path styles. + file, line = trace.match(/^(.+?):(\d+).*$/, &:captures) || trace + [file, line.to_i] + end + + def expand_backtrace + @exception.backtrace.unshift( + @exception.to_s.split("\n") + ).flatten! + end + end +end |