-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Btw, forgot to ask, any alternatives that could solve my problem in the short term?
Again, thanks for the attention. On 01/18/2014 02:18 PM, Matthias Felleisen wrote: > > To supplement Matthew's response, see exn style: > > http://plt.eecs.northwestern.edu/snapshots/current/doc/style/Choosing_the_Right_Construct.html#%28part._.Exceptions%29 > > This does not address the problem part. > > On Jan 18, 2014, at 11:04 AM, Matthew Flatt wrote: > >> The `exn?` predicate would catch all exceptions from the base >> libraries.[*] >> >> I think the problem may be that the underlying TCP port is read >> in a separate decoding thread, and so the exception and printing >> happens in that thread. If I'm right, then that seems like a flaw >> in our implementation of decoding. >> >> [*] To avoid interfering with the `exn:break?` exceptions >> triggered by Ctl-C, you almost always want `exn:fail?` instead of >> just `exn?`. >> >> At Sat, 18 Jan 2014 09:50:15 -0200, Eduardo Bellani wrote: > Is there a way to install a handler for the tcp-error exception? I > have a function like this > > (define (get-page link-url (max-tries 5)) (let loop ([current-try > 0]) (with-handlers ([exn? (? (e) (if (> current-try max-tries) > (error 'get-page "failed because it exceeded ~a tries" max-tries) > (begin (sleep 2) (loop (add1 current-try)))))]) (get-pure-port > link-url)))) > > that I'm using to crawl some data, but sometimes it's printing: > > tcp-read: error reading system error: Connection reset by peer; > errno=104 context...: /usr/racket/collects/net/url.rkt:392:3 > > Thanks for the attention. > >>> ____________________ Racket Users list: >>> http://lists.racket-lang.org/users >> ____________________ Racket Users list: >> http://lists.racket-lang.org/users > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlLa+0AACgkQSbLl0kCTjGm2swCfaFcrArWUUWp/4nMXR06wK8bn /yMAniLAl9bWU28Y1FVkrBKtkniFGohS =F4Li -----END PGP SIGNATURE----- ____________________ Racket Users list: http://lists.racket-lang.org/users
