Add rudimentary error reporting.

macli.py

@@ -59,6 +59,7 @@ def get_extension(path):
 
 
 def request(url):
+    print("> {}".format(url))
     req = urllib.request.Request(
         url,
         data=None,
@@ -69,6 +70,10 @@ def request(url):
     return urllib.request.urlopen(req)
 
 
+def show_error(e):
+    print("\x1b[41;37m{}\x1b[0m")
+
+
 def archive(content, base_url, selector, directory, attribute):
     os.makedirs(directory, exist_ok=True)
     for part in content.find_all(**selector):
@@ -84,7 +89,12 @@ def archive(content, base_url, selector, directory, attribute):
 
         path = os.path.join(directory, name)
         if not os.path.exists(path):
+            try:
                 content = request(href).read()
+            except Exception as e:
+                show_error(e)
+                continue
+
             with open(path, 'wb') as f:
                 f.write(content)