Ignoring timeouts in Drakma

Patrick May patrick.may at mac.com
Wed Jun 12 22:23:36 UTC 2013

On Jun 12, 2013, at 3:58 PM, Hans Hübner <hans.huebner at gmail.com> wrote:
> This is not Drakma specific:
> (defun try-request-from-multiple-urls (&rest urls)
>   (loop
>     (with-simple-restart (try-next "Try next URL")
>       (handler-case
>           (let ((url (first urls)))
>             (format t "requesting ~A~%" url)
>             (return (drakma:http-request url)))
>         (usocket:timeout-error ()
>           (setf urls (rest urls))
>           (unless urls
>             (format t "no more urls, returning~%")
>             (return))
>           (format t "timeout, trying next url~%")
>           (invoke-restart 'try-next))))))
> Tune as desired.  If you want to have the last timeout error percolate to the caller, you'll want handler-bind instead.

	Thanks, Hans (and Drew C).  I figured out my problem on the train home (debugging by public embarrassment), but your use of with-simple-restart makes the code more understandable so I'll incorporate that.

	Sorry for being too quick to post.


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