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gnu-maintenance: Adjust `http-fetch' to the various Guile versions.

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* guix/gnu-maintenance.scm (http-fetch): Try #:streaming? #t, or
  'http-get*', or 'http-get' as a last resort.  Check whether DATA is
  #f, a string, or an input port.
This commit is contained in:
Ludovic Courtès 2013-04-01 00:41:55 +02:00
parent fdfd3d5d9c
commit ef8c03407d
1 changed files with 11 additions and 4 deletions
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15
guix/gnu-maintenance.scm
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@ -66,12 +66,18 @@
(define (http-fetch uri)
"Return an input port containing the textual data at URI, a string."
(let*-values (((resp data)
(http-get (string->uri uri)))
(let ((uri (string->uri uri)))
;; Try hard to use the API du jour to get an input port.
(if (version>? "2.0.7" (version))
(if (defined? 'http-get*)
(http-get* uri)
(http-get uri)) ; old Guile, returns a string
(http-get uri #:streaming? #t)))) ; 2.0.8 or later
((code)
(response-code resp)))
(case code
((200)
(cond ((string<=? (version) "2.0.5")
(cond ((not data)
(begin
;; XXX: Guile 2.0.5 and earlier did not support chunked transfer
;; encoding, which is required when fetching %PACKAGE-LIST-URL
@ -85,9 +91,10 @@
(response-transfer-encoding resp))
(error "download failed; use a newer Guile"
uri resp)))
((string<=? (version) "2.0.7")
((string? data) ; old `http-get' returns a string
(open-input-string data))
(else data)))
(else ; input port
data)))
(else
(error "download failed" uri code
(response-reason-phrase resp))))))