bpo-36522: Print all values for headers with multiple values. (GH-12681)

2 files changed, 6 insertions, 4 deletions

diff --git a/Lib/http/client.py b/Lib/http/client.py
index 5aa178d..1de151c 100644
--- a/Lib/http/client.py
+++ b/Lib/http/client.py
@@ -320,8 +320,8 @@ class HTTPResponse(io.BufferedIOBase):
         self.headers = self.msg = parse_headers(self.fp)
 
         if self.debuglevel > 0:
-            for hdr in self.headers:
-                print("header:", hdr + ":", self.headers.get(hdr))
+            for hdr, val in self.headers.items():
+                print("header:", hdr + ":", val)
 
         # are we using the chunked-style of transfer encoding?
         tr_enc = self.headers.get("transfer-encoding")
diff --git a/Lib/test/test_httplib.py b/Lib/test/test_httplib.py
index f816eac..4755f8b 100644
--- a/Lib/test/test_httplib.py
+++ b/Lib/test/test_httplib.py
@@ -348,7 +348,8 @@ class HeaderTests(TestCase):
         body = (
             b'HTTP/1.1 200 OK\r\n'
             b'First: val\r\n'
-            b'Second: val\r\n'
+            b'Second: val1\r\n'
+            b'Second: val2\r\n'
         )
         sock = FakeSocket(body)
         resp = client.HTTPResponse(sock, debuglevel=1)
@@ -357,7 +358,8 @@ class HeaderTests(TestCase):
         lines = output.getvalue().splitlines()
         self.assertEqual(lines[0], "reply: 'HTTP/1.1 200 OK\\r\\n'")
         self.assertEqual(lines[1], "header: First: val")
-        self.assertEqual(lines[2], "header: Second: val")
+        self.assertEqual(lines[2], "header: Second: val1")
+        self.assertEqual(lines[3], "header: Second: val2")
 
 
 class TransferEncodingTest(TestCase):