Issue #20007: HTTPResponse.read(0) no more prematurely closes connection.

Original patch by Simon Sapin.

Lib/httplib.py

@@ -565,7 +565,7 @@ class HTTPResponse:
         # connection, and the user is reading more bytes than will be provided
         # (for example, reading in 1k chunks)
         s = self.fp.read(amt)
-        if not s:
+        if not s and amt:
             # Ideally, we would raise IncompleteRead if the content-length
             # wasn't satisfied, but it might break compatibility.
             self.close()

Lib/test/test_httplib.py

@@ -153,6 +153,8 @@ class BasicTest(TestCase):
         sock = FakeSocket(body)
         resp = httplib.HTTPResponse(sock)
         resp.begin()
+        self.assertEqual(resp.read(0), '')  # Issue #20007
+        self.assertFalse(resp.isclosed())
         self.assertEqual(resp.read(), 'Text')
         self.assertTrue(resp.isclosed())
 

Misc/ACKS

@@ -904,6 +904,7 @@ George Sakkis
 Rich Salz
 Kevin Samborn
 Ilya Sandler
+Simon Sapin
 Mark Sapiro
 Ty Sarna
 Hugh Sasse

Misc/NEWS

@@ -27,6 +27,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #20007: HTTPResponse.read(0) no more prematurely closes connection.
+  Original patch by Simon Sapin.
+
 - Issue #19912: Fixed numerous bugs in ntpath.splitunc().
 
 - Issue #19623: Fixed writing to unseekable files in the aifc module.