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download: Report the progress of HTTP downloads. 

* guix/build/download.scm (http-fetch): Rename `bv' to `bv-or-port'.
  Use `http-get*' followed by `dump-port' when the former is available,
  and pass a progress procedure to `dump-port'.
This commit is contained in:
Ludovic Courtès 2013-01-06 18:36:50 +01:00
parent e47bac7902
commit e66ca1a5a8
1 changed files with 20 additions and 6 deletions
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26
guix/build/download.scm
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@ -126,20 +126,34 @@ which is not available during bootstrap."
(define (http-fetch uri file)
"Fetch data from URI and write it to FILE. Return FILE on success."
;; FIXME: Use a variant of `http-get' that returns a port instead of
;; loading everything in memory.
(let*-values (((connection)
(open-connection-for-uri uri))
((resp bv)
(http-get uri #:port connection #:decode-body? #f))
((resp bv-or-port)
;; XXX: `http-get*' was introduced in 2.0.7. We know
;; we're using it within the chroot, but
;; `guix-download' might be using a different version.
;; So keep this compatibility hack for now.
(if (module-defined? (resolve-interface '(web client))
'http-get*)
(http-get* uri #:port connection #:decode-body? #f)
(http-get uri #:port connection #:decode-body? #f)))
((code)
(response-code resp)))
(response-code resp))
((size)
(response-content-length resp)))
(case code
((200) ; OK
(begin
(call-with-output-file file
(lambda (p)
(put-bytevector p bv)))
(if (port? bv-or-port)
(begin
(dump-port bv-or-port p
#:buffer-size 65536 ; don't flood the log
#:progress (progress-proc (uri->string uri)
size))
(newline))
(put-bytevector p bv-or-port))))
file))
((302) ; found (redirection)
(let ((uri (response-location resp)))