1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
# frozen_string_literal: true
require "action_dispatch/http/request"
require "action_dispatch/middleware/exception_wrapper"
require "action_dispatch/routing/inspector"
require "action_view"
require "action_view/base"
module ActionDispatch
# This middleware is responsible for logging exceptions and
# showing a debugging page in case the request is local.
class DebugExceptions
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)
request = ActionDispatch::Request.new env
_, headers, body = response = @app.call(env)
if headers["X-Cascade"] == "pass"
body.close if body.respond_to?(:close)
raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
end
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|
interceptor.call(request, exception)
rescue Exception
log_error(request, wrapper)
end
end
def render_exception(request, exception)
backtrace_cleaner = request.get_header("action_dispatch.backtrace_cleaner")
wrapper = ExceptionWrapper.new(backtrace_cleaner, exception)
log_error(request, wrapper)
if request.get_header("action_dispatch.show_detailed_exceptions")
begin
content_type = request.formats.first
rescue Mime::Type::InvalidMimeType
render_for_api_request(Mime[:text], wrapper)
end
if api_request?(content_type)
render_for_api_request(content_type, wrapper)
else
render_for_browser_request(request, wrapper)
end
else
raise exception
end
end
def render_for_browser_request(request, wrapper)
template = create_template(request, wrapper)
file = "rescues/#{wrapper.rescue_template}"
if request.xhr?
body = template.render(template: file, layout: false, formats: [:text])
format = "text/plain"
else
body = template.render(template: file, layout: "rescues/layout")
format = "text/html"
end
render(wrapper.status_code, body, format)
end
def render_for_api_request(content_type, wrapper)
body = {
status: wrapper.status_code,
error: Rack::Utils::HTTP_STATUS_CODES.fetch(
wrapper.status_code,
Rack::Utils::HTTP_STATUS_CODES[500]
),
exception: wrapper.exception.inspect,
traces: wrapper.traces
}
to_format = "to_#{content_type.to_sym}"
if content_type && body.respond_to?(to_format)
formatted_body = body.public_send(to_format)
format = content_type
else
formatted_body = body.to_json
format = Mime[:json]
end
render(wrapper.status_code, formatted_body, format)
end
def create_template(request, wrapper)
DebugView.new(
request: request,
exception_wrapper: wrapper,
exception: wrapper.exception,
traces: wrapper.traces,
show_source_idx: wrapper.source_to_show_id,
trace_to_show: wrapper.trace_to_show,
routes_inspector: routes_inspector(wrapper.exception),
source_extracts: wrapper.source_extracts,
line_number: wrapper.line_number,
file: wrapper.file
)
end
def render(status, body, format)
[status, { "Content-Type" => "#{format}; charset=#{Response.default_charset}", "Content-Length" => body.bytesize.to_s }, [body]]
end
def log_error(request, wrapper)
logger = logger(request)
return unless logger
exception = wrapper.exception
trace = wrapper.application_trace
trace = wrapper.framework_trace if trace.empty?
ActiveSupport::Deprecation.silence do
message = []
message << " "
message << "#{exception.class} (#{exception.message}):"
message.concat(exception.annoted_source_code) if exception.respond_to?(:annoted_source_code)
message << " "
message.concat(trace)
log_array(logger, message)
end
end
def log_array(logger, array)
if logger.formatter && logger.formatter.respond_to?(:tags_text)
logger.fatal array.join("\n#{logger.formatter.tags_text}")
else
logger.fatal array.join("\n")
end
end
def logger(request)
request.logger || ActionView::Base.logger || stderr_logger
end
def stderr_logger
@stderr_logger ||= ActiveSupport::Logger.new($stderr)
end
def routes_inspector(exception)
if @routes_app.respond_to?(:routes) && (exception.is_a?(ActionController::RoutingError) || exception.is_a?(ActionView::Template::Error))
ActionDispatch::Routing::RoutesInspector.new(@routes_app.routes.routes)
end
end
def api_request?(content_type)
@response_format == :api && !content_type.html?
end
end
end
|
