# Net::imap exceptions **URL:** \ **Category:** Ruby\ **Created:** [January 24, 2006, 4:56am UTC](https://www.ruby-forum.com/t/net-imap-exceptions/96428 "2006-01-24T04:56:04Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![russellf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/7bcc69/32.png) [@russellf](https://www.ruby-forum.com/u/russellf)\ **Post date:** [January 24, 2006, 4:56am UTC](https://www.ruby-forum.com/t/net-imap-exceptions/96428/1 "2006-01-24T04:56:04Z")
Hi, I have a program that I am using to do password auditing on various IMAP servers. It defines this method: def tryIMAP (host, usessl, user, pass) ``` proto = usessl ? "IMAPS" : "IMAP" ``` begin imap = Net::IMAP.new(host, usessl ? 993 : 143, usessl) rescue =\> e imap.disconnect if imap STDERR.print “#{host} #{proto} #{e.to\_s}\n”; raise RuntimeError, “#{proto} failed” end begin imap.login( user, pass) imap.logout imap.disconnect ‘success’ rescue Net::IMAP::NoResponseError ‘failure’ end end But the rescue clause does not catch all errors: (Net::IMAP::ByeResponseError)948:in `receive_responses': * BYE Autologout; idle for too long from /usr/lib/ruby/1.8/net/imap.rb:932:in`synchronize’ from /usr/lib/ruby/1.8/net/imap.rb:932:in `receive_responses' from /usr/lib/ruby/1.8/net/imap.rb:917:in`initialize’ from /usr/lib/ruby/1.8/net/imap.rb:916:in `start' from /usr/lib/ruby/1.8/net/imap.rb:916:in`initialize’ from test.rb:11:in `new' from test.rb:11:in`tryIMAP’ from test.rb:143 from test.rb:100:in `each' from test.rb:100 from test.rb:89:in`each’ from test.rb:89 from test.rb:88:in `open’ from test.rb:88 How can I catch these errors? ---
**Author:** ![russellf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/7bcc69/32.png) [@russellf](https://www.ruby-forum.com/u/russellf)\ **Post date:** [January 24, 2006, 8:13am UTC](https://www.ruby-forum.com/t/net-imap-exceptions/96428/2 "2006-01-24T08:13:22Z")
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Russell F. wrote: > ``` > imap.disconnect if imap > > ``` > > end > > end > > But the rescue clause does not catch all errors: > > (Net::IMAP::ByeResponseError)948:in `receive\_responses’: \* BYE > Autologout; idle for too long [snip] > How can I catch these errors? Change the rescue-line to: > rescue Net::IMAP::NoResponseError, Net::IMAP::ByeResponseError, Net::IMAP::BadResponseError and so on. Maybe it helps to rescue Net::IMAP::Error only, but can’t have a look at the implementation of the other exceptions at the moment. HTH Stefan -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (MingW32) iD8DBQFD1dLM9S2Eui6zfdQRAiiRAJ9CMxchp2129sP5srKNpFHhEUIIgQCfU+ov 4bEy3i+wvmei5HvOR8RYDKk= =Y0JS -----END PGP SIGNATURE----- ---
**Author:** ![russellf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/7bcc69/32.png) [@russellf](https://www.ruby-forum.com/u/russellf)\ **Post date:** [January 24, 2006, 8:05pm UTC](https://www.ruby-forum.com/t/net-imap-exceptions/96428/3 "2006-01-24T20:05:11Z")
Stefan M. wrote: Thanks for your response Stefan! > > How can I catch these errors? > > Change the rescue-line to: > > > rescue Net::IMAP::NoResponseError, Net::IMAP::ByeResponseError, Net::IMAP::BadResponseError That was going to be my next try. Hmmm… last time I tried putting more than one exception on a rescue statement I got a syntax error?? I’ll try again – must have been some other issue. > and so on. Maybe it helps to rescue Net::IMAP::Error only, but can’t > have a look at the implementation of the other exceptions at the moment. Just a check on my understanding of how things _should_ work: I thought that an unadorned “rescue” _should_ catch _all_ exceptions. Is this correct? Should I file a bug report? Where to? Russell ---
**Author:** ![russellf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/7bcc69/32.png) [@russellf](https://www.ruby-forum.com/u/russellf)\ **Post date:** [January 26, 2006, 8:43pm UTC](https://www.ruby-forum.com/t/net-imap-exceptions/96428/4 "2006-01-26T20:43:45Z")
Russell F. wrote: > more than one exception on a rescue statement I got a syntax error?? > I’ll try again – must have been some other issue. > > > and so on. Maybe it helps to rescue Net::IMAP::Error only, but can’t > > have a look at the implementation of the other exceptions at the moment. > > Just a check on my understanding of how things _should_ work: > > I thought that an unadorned “rescue” _should_ catch _all_ exceptions. > Is this correct? Should I file a bug report? Where to? No, it will only catch all Exceptions that are derived from StandardError (as I read Pickaxe II, page 108). Figure 8.1 on page 109 could be helpful. The exception gets thrown in > imap = Net::IMAP.new(host, usessl ? 993 : 143, usessl) as the backtrace tells: > … > from /usr/lib/ruby/1.8/net/imap.rb:916:in `initialize' from test.rb:11:in`new’ > from test.rb:11:in `tryIMAP’ > … and on line 12 is only the standard rescue > rescue =\> e If you add the IMAP-Exceptions there it should work (and raise a RuntimeException). ---
**Author:** ![russellf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/7bcc69/32.png) [@russellf](https://www.ruby-forum.com/u/russellf)\ **Post date:** [January 26, 2006, 9:34pm UTC](https://www.ruby-forum.com/t/net-imap-exceptions/96428/5 "2006-01-26T21:34:55Z")
Stefan M. wrote: > No, it will only catch all Exceptions that are derived from > StandardError (as I read Pickaxe II, page 108). Ah! missed that, my bad! Thanks Stefan! ---
**Author:** ![russellf](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/7bcc69/32.png) [@russellf](https://www.ruby-forum.com/u/russellf)\ **Post date:** [January 25, 2006, 12:52am UTC](https://www.ruby-forum.com/t/net-imap-exceptions/96428/6 "2006-01-25T00:52:58Z")
Russell F. wrote: > Stefan M. wrote: > > Thanks for your response Stefan! > > > > How can I catch these errors? > > > > Change the rescue-line to: > > > > > rescue Net::IMAP::NoResponseError, Net::IMAP::ByeResponseError, Net::IMAP::BadResponseError > > That was going to be my next try. I have now tried this and it still throws the exception with an explicit rescue for that error. Russell