Re: mechanize timeout errors

rescue
execution expired
(Timeout::Error)
from /usr/local/lib/ruby/1.8/timeout.rb:56:in timeout' from /usr/local/lib/ruby/1.8/timeout.rb:76:intimeout’

begin
page = agent.get(url)
rescue Timeout::Error
puts “Timeout!”
raise
rescue
puts “Some other error!”
raise
end

If you want control over the timeout value I think you’ll need to
re-wrap the call to agent.get in your own timeout block:

require ‘timeout’

begin
Timeout.timeout(5){ agent.get(url) }

If you’re wondering why your rescue didn’t handle the exception, it’s
because Timeout::Error is a subclass of Interrupt, not StandardError.

Regards,

Dan

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Berger, Daniel wrote:

rescue
execution expired
rescue
puts “Some other error!”
raise
end

If you want control over the timeout value I think you’ll need to
re-wrap the call to agent.get in your own timeout block:
Not so: WWW::Mechanize#read_timeout= is your friend.

could you plz elaborate a little on that or point me to an example.

akanksha wrote:

To: ruby-talk ML
catches invalid urls etc. , but how to I handle timeout

If you want control over the timeout value I think you’ll need to
re-wrap the call to agent.get in your own timeout block:

Not so: WWW::Mechanize#read_timeout= is your friend.


A;ex

Sure:

irb(main):001:0> require ‘mechanize’
=> true
irb(main):002:0> agent = WWW::Mechanize.new;
irb(main):003:0> agent.read_timeout = 0.1 # set a 0.1sec timeout
=> 0.1
irb(main):004:0> begin
irb(main):005:1* agent.get(“http://www.ruby-doc.org”)
irb(main):006:1> rescue Timeout::Error
irb(main):007:1> puts “Timeout!”
irb(main):008:1> end
Timeout!
=> nil
irb(main):009:0>

Timeout errors can be caught like this:

require ‘timeout’

timeout(5) do
do_something()
end
rescue Timeout::Error
puts “Hey timeout error”
end

So I did what you said…

  agent.read_timeout = 10
   begin
     page = agent.get(url)
   rescue Timeout::Error
     puts "Timeout error"
   rescue
     puts "Normal error"
   end

but am still getting the following error. Any idea what might be
causing it?

GET: http://xyz.com
request-header: accept => /
request-header: user-agent => WWW-Mechanize/0.5.1
(http://rubyforge.org/projects/mechanize/)
header: cache-control : private
header: connection : close, close
header: expires : Thu, 30 Sep 1999 01:29:07 GMT
header: content-type : text/html
header: x-powered-by : ASP.NET
header: date : Tue, 08 Aug 2006 21:43:28 GMT
header: x-server : CF0471
header: server : Microsoft-IIS/6.0
header: page-completion-status : Normal, Normal
header: pragma : no-cache
status: 200
GET: http://xyz.com
request-header: accept => /
request-header: user-agent => WWW-Mechanize/0.5.1
(http://rubyforge.org/projects/mechanize/)
request-header: referer => http://xyz.com
/usr/local/lib/ruby/1.8/timeout.rb:54:in rbuf_fill': execution expired (Timeout::Error) from /usr/local/lib/ruby/1.8/timeout.rb:56:intimeout’
from /usr/local/lib/ruby/1.8/timeout.rb:76:in timeout' from /usr/local/lib/ruby/1.8/net/protocol.rb:132:inrbuf_fill’
from /usr/local/lib/ruby/1.8/net/protocol.rb:116:in readuntil' from /usr/local/lib/ruby/1.8/net/protocol.rb:126:inreadline’
from /usr/local/lib/ruby/1.8/net/http.rb:1988:in
read_status_line' from /usr/local/lib/ruby/1.8/net/http.rb:1977:inread_new’
from /usr/local/lib/ruby/1.8/net/http.rb:1046:in `request’
… 8 levels…

Also, you may like to read this:

http://blog.segment7.net/articles/2006/04/11/care-and-feeding-of-timeout-tim
eout

by our own, Eric H…

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