From a86e7cf5a7b0670d5ebffc44ad9641e6b5d90c81 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Wed, 8 Feb 2017 01:12:45 +0300
Subject: [PATCH] upip: Report host name resolve error in user friendly manner.

---
 upip/upip.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/upip/upip.py b/upip/upip.py
index 93644d59..67624f7d 100644
--- a/upip/upip.py
+++ b/upip/upip.py
@@ -105,7 +105,10 @@ warn_ussl = True
 def url_open(url):
     global warn_ussl
     proto, _, host, urlpath = url.split('/', 3)
-    ai = usocket.getaddrinfo(host, 443)
+    try:
+        ai = usocket.getaddrinfo(host, 443)
+    except OSError as e:
+        fatal("Unable to resolve %s (no Internet?)" % host, e)
     #print("Address infos:", ai)
     addr = ai[0][4]