Store initial method in issuers (#595)

lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Issuer/SAML.pm

@@ -102,7 +102,7 @@ sub run {
     # Get HTTP request informations to know
     # if we are receving SAML request or response
     my $url                     = $req->uri;
-    my $request_method          = $req->method();
+    my $request_method          = $req->param('issuerMethod') || $req->method;
     my $content_type            = $req->contentType();
     my $idp_initiated           = $req->param('IDPInitiated');
     my $idp_initiated_sp        = $req->param('sp');

lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Main/Issuer.pm

@@ -53,6 +53,7 @@ sub _redirect {
     foreach my $k ( keys %$prms ) {
         $self->p->setHiddenFormValue( $req, $k, $prms->{$k}, '', 0 );
     }
+    $self->p->setHiddenFormValue( $req, 'issuerMethod', $req->method, '', 0);
     $req->{urldc} =
         $self->conf->{portal}
       . $req->path