On 2016-09-03 11:54, Andy Wingo wrote:
> On Sat 03 Sep 2016 09:20, Amirouche Boubekki <amirouche@hypermove.net> 
> writes:
> 
>> Using guile 2.1.3, I have a program that:
>> 
>> - reads urls from a text file
>> - download the urls using curl command via popen
>> - output the result to stdout
>> 
>> Also, it relies on n-for-each-par-map for ice-9 threads.
> 
> Can you reduce it please?  For example, remove the use of threads.
> 

Ok. I removed threads and only download the same url over and over 
again.

Here is the error I get on stdout:

    (23) Failed writing body

The program is:

(use-modules (ice-9 popen))


;;; wrapping curl command

(define (curl url)
   (let* ((port (open-input-pipe (format #f "curl -is \"~a\"" url)))
          (response (read-string port)))
     (close-pipe port)
     response))


(define (maybe-curl url)
   (catch #t
     (lambda ()
       (display "." (current-error-port))
       (write (cons url (curl url))))
     (lambda _ '())))

(define urls (map (lambda _ "http://hyperdev.fr/") (iota 1000)))

(display "started")

(for-each maybe-curl urls)