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gmane.lisp.guile.bugs |
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Hello,
I installed gnutls for guile and checked the gnutls module with this
simple code:
;;Guile version 3.0 and gnutls from git
,show version
GNU Guile 3.0.0.15-ff14b7
(gnutls-version)
$6 = "3.6.12"
;;Now, submitting this simple https request, you get an exception
(http-request "https://www.google.com")
ice-9/boot-9.scm:1669:16: In procedure raise-exception:
Throw to key `gnutls-error' with args `(#<gnutls-error-enum La
connessione TLS non è stata terminata in modo corretto.>
read_from_session_record_port)'.
;;instead, without https there are no errors
(http-request "http://www.google.com") ;;works fine.
The error happens only on https://www.google.com and does not throw with
a lot of other https web sites.
Furthermore the error is not throw if the method is HEAD, so it is
related to the data part of the https answer.
I tried to enter in the internal implementation of the http web client
but after some tests I decided to do some simple tests at application level.
I rewrote the get-bytevector-all, with a loop that reads one byte per
time and the error was thrown anyway.
I catched the error and I've got the complete answer from the google web
server.
In the following there is my applicative solution, where I rewrote the
get-bytevector-all by adding the error checking and specifiyng to
http-request that the data has to be returned as a port (#:streaming? #t).
;;A macro to catch errors
(define-syntax my-noerr
(syntax-rules ()
((_ __error-return exp ...)
(let
((__st #f))
(catch #t
(lambda() exp ...)
(lambda (k . p) __error-return))))))
;;The rewriting of get-bytevector-all
(defun get-bytevector-all (port)
(u8-list->bytevector (let loop ((port port))
(let ((v (my-noerr (eof-object) (get-u8 port))))
(if (eof-object? v)
#nil
(cons v (loop port)))))))
;;the piece of code that now gives the correct result
(let-values (((a b)(http-request "https://www.google.com"
#:streaming? #t)))
(bytevector->string (get-bytevector-all b) "ISO-8859-1"))
As conclusion I can say that web modules read correctly the http answers
and, with some (one for me, the google web site) https sites there is a
misinterpretation of EOF in the layer between http and https.
Franco.