Updated automirror for urllib.request

Summary: Updated automirror for urllib.request

Test Plan:
Verify basic function in US, but then also have non-US users test for functionality, especially paying attention to time.

More specifically, this patch should be able to be applied directly to /usr/lib/(i138-linux-gnu|x86_64-linux-gnu)/calamares/modules/automirror/main.py in a live system, then run the installer and see what happens.

Reviewers: tsimonq2, wxl

Reviewed By: tsimonq2

Differential Revision: https://phab.lubuntu.me/D23

common/modules/automirror/main.py

@@ -19,7 +19,10 @@ import json
 import subprocess
 import libcalamares
 from time import strftime
-from urllib import request
+import urllib.request
+from urllib.error import HTTPError
+from urllib.error import URLError
+from socket import timeout
 from lsb_release import get_distro_information
 
 global sources
@@ -80,23 +83,51 @@ deb URL/ubuntu/ CODENAME-backports main restricted universe multiverse
 # deb http://archive.canonical.com/ubuntu CODENAME partner
 # deb-src http://archive.canonical.com/ubuntu CODENAME partner"""
 
+
 def getcountry():
-    # This is hardcoded for now, but should eventually be put into the config
-    with request.urlopen("https://ipapi.co/json") as url:
-        localedata = json.loads(url.read().decode())
+    # This URI hardcoded for now, but should eventually be put into the config
+    geoipurl = "https://ipapi.co/json"
+    try:
+        with urllib.request.urlopen(geoipurl, timeout=75) as url:
+            localedata = json.loads(url.read().decode())
+    except HTTPError:
+        logging.error("Data of %s not retrieved because %s - URL: %s",
+                      name, error, url)
+    except URLError:
+        if isinstance(error.reason, socket.timeout):
+            logging.error("Socket timed out - URL %s", url)
+        else:
+            logging.error("Non-timeout protocol error.")
+    else:
+        print("Country successfully determined.")
     return localedata["country"]
 
+
 def getmirror(country):
-    with request.urlopen(libcalamares.job.configuration["mirrorList"]) as url:
-        mirrors = json.loads(url.read().decode())
+    mirrorlisturl = libcalamares.job.configuration["mirrorList"]
+    try:
+        with urllib.request.urlopen(mirrorlisturl, timeout=75) as url:
+            mirrors = json.loads(url.read().decode())
+    except HTTPError:
+        logging.error("Data of %s not retrieved because %s - URL: %s",
+                      name, error, url)
+    except URLError:
+        if isinstance(error.reason, socket.timeout):
+            logging.error("Socket timed out - URL %s", url)
+        else:
+            logging.error("Non-timeout protocol error.")
+    else:
+        print("Mirror successfully determined.")
     if country in mirrors.keys():
         return mirrors[country] + "."
     else:
         return ""
 
+
 def getcodename():
     return get_distro_information()["CODENAME"]
 
+
 def changesources(prefix):
     root = libcalamares.globalstorage.value("rootMountPoint")
 
@@ -118,6 +149,7 @@ def changesources(prefix):
                 sourcesfile.write(sources)
                 sourcesfile.truncate()
 
+
 def run():
     """Autoselect a mirror from a list."""
     if libcalamares.globalstorage.value("hasInternet"):

debian/changelog

@@ -8,8 +8,9 @@ calamares-settings-ubuntu (24) cosmic; urgency=medium
 
   [ Walter Lapchynski ]
   * Generalize installation of GRUB for EFI.
+  * Add urlopen() error handling to automirror, thanks to Samuel Banya. 
 
- -- Walter Lapchynski <wxl@ubuntu.com>  Tue, 09 Oct 2018 21:51:55 -0700
+ -- Walter Lapchynski <wxl@ubuntu.com>  Wed, 10 Oct 2018 08:36:52 -0700
 
 calamares-settings-ubuntu (23) cosmic; urgency=medium