Initial QSfera import

Server/vendor/github.com/crewjam/saml/samlsp/error.go

@@ -0,0 +1,25 @@
+package samlsp
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/crewjam/saml"
+)
+
+// ErrorFunction is a callback that is invoked to return an error to the
+// web user.
+type ErrorFunction func(w http.ResponseWriter, r *http.Request, err error)
+
+// DefaultOnError is the default ErrorFunction implementation. It prints
+// an message via the standard log package and returns a simple text
+// "Forbidden" message to the user.
+func DefaultOnError(w http.ResponseWriter, _ *http.Request, err error) {
+	if parseErr, ok := err.(*saml.InvalidResponseError); ok {
+		log.Printf("WARNING: received invalid saml response: %s (now: %s) %s",
+			parseErr.Response, parseErr.Now, parseErr.PrivateErr)
+	} else {
+		log.Printf("ERROR: %s", err)
+	}
+	http.Error(w, http.StatusText(http.StatusForbidden), http.StatusForbidden)
+}