version 6.07 does not work with IO::Socket::INET6 [rt.cpan.org #98306]

Migrated from rt.cpan.org#98306 (status was 'new')

Requestors:

• Thomas.Eckardt@thockar.com

From thomas.eckardt@thockar.com on 2014-08-25 09:05:24:

- Perl version independend
- OS independend

This happens 100% on systems which supports IPv6 but has not a bound IPv6 
address except localhost (::1) and on systems without any IPv6 support.
This was not verfied on a system with fully configured IPv6.
If IO::Socket::INET6 is installed but IO::Socket::IP is not - even the 
make tests are failing and the module is no longer working anymore.
If IO::Socket::INET6 is uninstalled, the module is working fine in any 
case.

This is related to the changes 6.06 -> 6.07

$VERSION = "6.07";
unless ($SOCKET_CLASS) {
    # Try several, in order of capability and preference
    if (eval { require IO::Socket::IP }) {
       $SOCKET_CLASS = "IO::Socket::IP";    # IPv4+IPv6
    } elsif (eval { require IO::Socket::INET6 }) {
       $SOCKET_CLASS = "IO::Socket::INET6"; # IPv4+IPv6
    } elsif (eval { require IO::Socket::INET }) {
       $SOCKET_CLASS = "IO::Socket::INET";  # IPv4 only
    } else {
       require IO::Socket;
       $SOCKET_CLASS = "IO::Socket::INET";
    }
} 


This is the dmake output from windows

c:\Perl\cpan\build\Net-HTTP-6.07>dmake test
C:\Perl\bin\perl.exe "-MExtUtils::Command::MM" "-MTest::Harness" "-e" 
"undef *Test::Harness::Switches; test_harness(0,blib\lib', 'blib\arch')" 
t/*.tt/apache-https.t .. print() on unopened filehandle GEN1 at 
C:/Perl/lib/IO/Handle.pm line 472.
sysread() on unopened filehandle GEN1 at C:/Perl/lib/IO/Handle.pm line 
465.
Status read failed: Bad file descriptor at 
C:\Perl\cpan\build\Net-HTTP-6.07\blib\lib/Net/HTTP/Methods.pm line 276.
t/apache-https.t .. Dubious, test returned 9 (wstat 2304, 0x900)
Failed 8/8 subtests
t/apache.t ........ print() on unopened filehandle GEN1 at 
C:/Perl/lib/IO/Handle.pm line 417.
sysread() on unopened filehandle GEN1 at C:/Perl/lib/IO/Handle.pm line 
465.
Status read failed: Bad file descriptor at 
C:\Perl\cpan\build\Net-HTTP-6.07\blib\lib/Net/HTTP/Methods.pm line 276.
t/apache.t ........ Dubious, test returned 9 (wstat 2304, 0x900)
Failed 8/8 subtests
t/http-nb.t ....... skipped: This test doesn't work on Windows
t/http.t .......... ok

Test Summary Report
-------------------
t/apache-https.t (Wstat: 2304 Tests: 0 Failed: 0)
  Non-zero exit status: 9
  Parse errors: Bad plan.  You planned 8 tests but ran 0.
t/apache.t      (Wstat: 2304 Tests: 0 Failed: 0)
  Non-zero exit status: 9
  Parse errors: Bad plan.  You planned 8 tests but ran 0.
Files=4, Tests=37,  4 wallclock secs ( 0.09 usr +  0.06 sys =  0.16 CPU)
Result: FAIL
Failed 2/4 test programs. 0/37 subtests failed.
dmake.exe:  Error code 255, while making 'test_dynamic'


It would be nice to have an option to preselect the $SOCKET_CLASS to use 
at module load time, at least before the call to Net::HTTP->new() or as an 
option in this call.
Now, setting $Net::HTTP::SOCKET_CLASS to any value before 'use Net::HTTP' 
or 'require Net::HTTP' is useless, changing it after 'use' or 'require' 
does not change @Net::HTTP::ISA - these variables are all not exported.

Thomas


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Start with the socket-selection logic in Net::HTTP and the failure reported at Net/HTTP/Methods.pm line 276. Run t/apache.t and t/apache-https.t with IO::Socket::INET6 installed but IO::Socket::IP absent, including the Windows failure context. Done means the affected configurations no longer fail and the requested socket-class selection behavior is addressed.