Fix Issue15701 - HTTPError info method call raises AttributeError. Fix that to return headers correctly

Lib/test/test_urllib2.py

@@ -1336,7 +1336,7 @@ class RequestTests(unittest.TestCase):
         req = Request(url)
         self.assertEqual(req.get_full_url(), url)
 
-def test_HTTPError_interface():
+    def test_HTTPError_interface(self):
         """
         Issue 13211 reveals that HTTPError didn't implement the URLError
         interface even though HTTPError is a subclass of URLError.
@@ -1347,6 +1347,22 @@ def test_HTTPError_interface():
         'something bad happened'
         """
 
+    def test_HTTPError_interface_call(self):
+        """
+        Issue 15701= - HTTPError interface has info method available from URLError.
+        """
+        err = urllib2.HTTPError(msg='something bad happened', url=None,
+                                code=None, hdrs='Content-Length:42', fp=None)
+        self.assertTrue(hasattr(err, 'reason'))
+        assert hasattr(err, 'reason')
+        assert hasattr(err, 'info')
+        assert callable(err.info)
+        try:
+            err.info()
+        except AttributeError:
+            self.fail("err.info() failed")
+        self.assertEqual(err.info(), "Content-Length:42")
+
 def test_main(verbose=None):
     from test import test_urllib2
     test_support.run_doctest(test_urllib2, verbose)

Lib/urllib2.py

@@ -173,6 +173,9 @@ class HTTPError(URLError, addinfourl):
     def reason(self):
         return self.msg
 
+    def info(self):
+        return self.hdrs
+
 # copied from cookielib.py
 _cut_port_re = re.compile(r":\d+$")
 def request_host(request):

Misc/NEWS

@@ -165,6 +165,8 @@ Library
 - Issue #16597: In buffered and text IO, call close() on the underlying stream
   if invoking flush() fails.
 
+- Issue #15701: Fix HTTPError info method call to return the headers information.
+
 - Issue #16646: ftplib.FTP.makeport() might lose socket error details.
   (patch by Serhiy Storchaka)