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: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> 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. >> >> -----BEGIN PGP SIGNATURE----- >> Version: GnuPG v1.4.14 (GNU/Linux) >> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ >> >> iEYEARECAAYFAlLaanUACgkQSbLl0kCTjGkm+ACbBSMyUuY4NOYjdLMgba/OJAFc >> 8OYAn0NkLMKLLma/MxAeEFMLtnrMekOY >> =aAUJ >> -----END PGP SIGNATURE----- >> ____________________ >> Racket Users list: >> http://lists.racket-lang.org/users > ____________________ > Racket Users list: > http://lists.racket-lang.org/users ____________________ Racket Users list: http://lists.racket-lang.org/users
