Limit to how many errors can be rescued? - ruby

Question

I have a program that I'm using as a pentesting tool, I'm in the process of discovering if websites are SQL vulnerable and came across a Timeout::Error now I have tried to rescue the error but there's also a few other errors that need to be rescued as well. So my question is, is there a limit to how many errors can be rescued within a rescue block? And if not why is this Timeout not getting rescued?
Source:
def get_urls
info("Searching for possible SQL vulnerable sites.")
#agent = Mechanize.new
page = #agent.get('http://www.google.com/')
google_form = page.form('f')
google_form.q = "#{SEARCH}"
url = #agent.submit(google_form, google_form.buttons.first)
url.links.each do |link|
if link.href.to_s =~ /url.q/
str = link.href.to_s
str_list = str.split(%r{=|&})
urls = str_list[1]
next if str_list[1].split('/')[2] == "webcache.googleusercontent.com"
urls_to_log = urls.gsub("%3F", '?').gsub("%3D", '=')
success("Site found: #{urls_to_log}")
File.open("#{PATH}/temp/SQL_sites_to_check.txt", "a+") {|s| s.puts("#{urls_to_log}'")}
end
end
info("Possible vulnerable sites dumped into #{PATH}/temp/SQL_sites.txt")
end
def check_if_vulnerable
info("Checking if sites are vulnerable.")
IO.read("#{PATH}/temp/SQL_sites_to_check.txt").each_line do |parse|
Timeout::timeout(5) do
begin
#parsing = Nokogiri::HTML(RestClient.get("#{parse.chomp}"))
rescue Timeout::Error, RestClient::ResourceNotFound, RestClient::SSLCertificateNotVerified
if RestClient::ResourceNotFound
warn("URL: #{parse.chomp} returned 404 error, URL dumped into 404 bin")
File.open("#{PATH}/lib/404_bin.txt", "a+"){|s| s.puts(parse)}
elsif RestClient::SSLCertificateNotVerified
err("URL: #{parse.chomp} requires SSL cert, url dumped into SSL bin")
File.open("#{PATH}/lib/SSL_bin.txt", "a+"){|s| s.puts(parse)}
elsif Timeout::Error
warn("URL: #{parse.chomp} failed to load resulting in time out after 10 seconds. URL dumped into TIMEOUT bin")
File.open("#{PATH}/lib/TIMEOUT_bin.txt", "a+"){|s| s.puts(parse)}
end
end
end
end
end
Error:
C:/Ruby22/lib/ruby/2.2.0/net/http.rb:892:in `new': execution expired (Timeout::E
rror)
from C:/Ruby22/lib/ruby/2.2.0/net/http.rb:892:in `connect'
from C:/Ruby22/lib/ruby/2.2.0/net/http.rb:863:in `do_start'
from C:/Ruby22/lib/ruby/2.2.0/net/http.rb:852:in `start'
from C:/Ruby22/lib/ruby/gems/2.2.0/gems/rest-client-1.8.0-x86-mingw32/li
b/restclient/request.rb:413:in `transmit'
from C:/Ruby22/lib/ruby/gems/2.2.0/gems/rest-client-1.8.0-x86-mingw32/li
b/restclient/request.rb:176:in `execute'
from C:/Ruby22/lib/ruby/gems/2.2.0/gems/rest-client-1.8.0-x86-mingw32/li
b/restclient/request.rb:41:in `execute'
from C:/Ruby22/lib/ruby/gems/2.2.0/gems/rest-client-1.8.0-x86-mingw32/li
b/restclient.rb:65:in `get'
from whitewidow.rb:94:in `block (2 levels) in check_if_vulnerable'
from C:/Ruby22/lib/ruby/2.2.0/timeout.rb:88:in `block in timeout'
from C:/Ruby22/lib/ruby/2.2.0/timeout.rb:32:in `block in catch'
from C:/Ruby22/lib/ruby/2.2.0/timeout.rb:32:in `catch'
from C:/Ruby22/lib/ruby/2.2.0/timeout.rb:32:in `catch'
from C:/Ruby22/lib/ruby/2.2.0/timeout.rb:103:in `timeout'
from whitewidow.rb:92:in `block in check_if_vulnerable'
from whitewidow.rb:91:in `each_line'
from whitewidow.rb:91:in `check_if_vulnerable'
from whitewidow.rb:113:in `<main>'
As you can see in the check_vulns method I have the Timeout::Error rescued. So what is causing this to timeout without moving to the next URL? I've tried adding a next to the rescue but it still doesn't work, help please?

Answer 1

By simply moving the Timeout I can rescue the error
def check_if_vulnerable
info("Checking if sites are vulnerable.")
IO.read("#{PATH}/temp/SQL_sites_to_check.txt").each_line do |parse|
begin
Timeout::timeout(5) do
#parsing = Nokogiri::HTML(RestClient.get("#{parse.chomp}"))
end
rescue Timeout::Error, RestClient::ResourceNotFound, RestClient::SSLCertificateNotVerified
if RestClient::ResourceNotFound
warn("URL: #{parse.chomp} returned 404 error, URL dumped into 404 bin")
File.open("#{PATH}/lib/404_bin.txt", "a+"){|s| s.puts(parse)}
elsif RestClient::SSLCertificateNotVerified
err("URL: #{parse.chomp} requires SSL cert, url dumped into SSL bin")
File.open("#{PATH}/lib/SSL_bin.txt", "a+"){|s| s.puts(parse)}
elsif Timeout::Error
warn("URL: #{parse.chomp} failed to load resulting in time out after 10 seconds. URL dumped into TIMEOUT bin")
File.open("#{PATH}/lib/TIMEOUT_bin.txt", "a+"){|s| s.puts(parse)}
end
end
end
end
end