fixes bug #111951

applies patch #101369 by Moshe Zadke
use explicit list of always safe characters instead of string.letters
add test case

Lib/test/output/test_urllib

@@ -0,0 +1 @@
+test_urllib

Lib/test/test_urllib.py

@@ -0,0 +1,14 @@
+# Minimal test of the quote function
+import urllib
+
+chars = 'abcdefghijklmnopqrstuvwxyz'\
+        '\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356' \
+        '\357\360\361\362\363\364\365\366\370\371\372\373\374\375\376\377' \
+        'ABCDEFGHIJKLMNOPQRSTUVWXYZ' \
+        '\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317' \
+        '\320\321\322\323\324\325\326\330\331\332\333\334\335\336'
+
+expected = 'abcdefghijklmnopqrstuvwxyz%df%e0%e1%e2%e3%e4%e5%e6%e7%e8%e9%ea%eb%ec%ed%ee%ef%f0%f1%f2%f3%f4%f5%f6%f8%f9%fa%fb%fc%fd%fe%ffABCDEFGHIJKLMNOPQRSTUVWXYZ%c0%c1%c2%c3%c4%c5%c6%c7%c8%c9%ca%cb%cc%cd%ce%cf%d0%d1%d2%d3%d4%d5%d6%d8%d9%da%db%dc%dd%de'
+
+test = urllib.quote(chars)
+assert test == expected, "urllib.quote problem"

Lib/urllib.py

@@ -1011,7 +1011,9 @@ def unquote_plus(s):
         s = string.join(string.split(s, '+'), ' ')
     return unquote(s)
 
-always_safe = string.letters + string.digits + '_,.-'
+always_safe = ('ABCDEFGHIJKLMNOPQRSTUVWXYZ' 
+               'abcdefghijklmnopqrstuvwxyz'
+               '0123456789' '_,.-')
 def quote(s, safe = '/'):
     """quote('abc def') -> 'abc%20def'."""
     # XXX Can speed this up an order of magnitude
@@ -1043,7 +1045,6 @@ def urlencode(dict):
         l.append(k + '=' + v)
     return string.join(l, '&')
 
-
 # Proxy handling
 def getproxies_environment():
     """Return a dictionary of scheme -> proxy server URL mappings.