Remove special logic that closes HTTPConnection socket on EPIPE.

http://bugs.python.org/issue5542

If the socket is closed, the client has no chance to read the response
from the server.  EPIPE means that it isn't possible to write more
data from the socket, but not that it is impossible to read.

Also, various formatting changes.

Lib/http/client.py

@@ -66,10 +66,11 @@ Req-started-unread-response    _CS_REQ_STARTED    <response_class>
 Req-sent-unread-response       _CS_REQ_SENT       <response_class>
 """
 
-import io
-import socket
 import email.parser
 import email.message
+import io
+import os
+import socket
 from urllib.parse import urlsplit
 import warnings
 
@@ -673,29 +674,24 @@ class HTTPConnection:
         #       ignore the error... the caller will know if they can retry.
         if self.debuglevel > 0:
             print("send:", repr(str))
-        try:
-            blocksize = 8192
-            if hasattr(str, "read") :
+        blocksize = 8192
+        if hasattr(str, "read") :
+            if self.debuglevel > 0:
+                print("sendIng a read()able")
+            encode = False
+            if "b" not in str.mode:
+                encode = True
                 if self.debuglevel > 0:
-                    print("sendIng a read()able")
-                encode = False
-                if "b" not in str.mode:
-                    encode = True
-                    if self.debuglevel > 0:
-                        print("encoding file using iso-8859-1")
-                while 1:
-                    data = str.read(blocksize)
-                    if not data:
-                        break
-                    if encode:
-                        data = data.encode("iso-8859-1")
-                    self.sock.sendall(data)
-            else:
-                self.sock.sendall(str)
-        except socket.error as v:
-            if v.args[0] == 32:      # Broken pipe
-                self.close()
-            raise
+                    print("encoding file using iso-8859-1")
+            while 1:
+                data = str.read(blocksize)
+                if not data:
+                    break
+                if encode:
+                    data = data.encode("iso-8859-1")
+                self.sock.sendall(data)
+        else:
+            self.sock.sendall(str)
 
     def _output(self, s):
         """Add a line of output to the current request buffer.
@@ -869,14 +865,7 @@ class HTTPConnection:
 
     def request(self, method, url, body=None, headers={}):
         """Send a complete request to the server."""
-        try:
-            self._send_request(method, url, body, headers)
-        except socket.error as v:
-            # trap 'Broken pipe' if we're allowed to automatically reconnect
-            if v.args[0] != 32 or not self.auto_open:
-                raise
-            # try one more time
-            self._send_request(method, url, body, headers)
+        self._send_request(method, url, body, headers)
 
     def _set_content_length(self, body):
         # Set the content-length based on the body.
@@ -886,7 +875,6 @@ class HTTPConnection:
         except TypeError as te:
             # If this is a file-like object, try to
             # fstat its file descriptor
-            import os
             try:
                 thelen = str(os.fstat(body.fileno()).st_size)
             except (AttributeError, OSError):
@@ -897,7 +885,7 @@ class HTTPConnection:
             self.putheader('Content-Length', thelen)
 
     def _send_request(self, method, url, body, headers):
-        # honour explicitly requested Host: and Accept-Encoding headers
+        # Honor explicitly requested Host: and Accept-Encoding: headers.
         header_names = dict.fromkeys([k.lower() for k in headers])
         skips = {}
         if 'host' in header_names:
@@ -983,7 +971,8 @@ else:
         def connect(self):
             "Connect to a host on a given (SSL) port."
 
-            sock = socket.create_connection((self.host, self.port), self.timeout)
+            sock = socket.create_connection((self.host, self.port),
+                                            self.timeout)
             self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file)
 
 

Lib/test/test_httplib.py

+import errno
 from http import client
 import io
 import socket
@@ -24,6 +25,21 @@ class FakeSocket:
             raise client.UnimplementedFileMode()
         return self.fileclass(self.text)
 
+class EPipeSocket(FakeSocket):
+
+    def __init__(self, text, pipe_trigger):
+        # When sendall() is called with pipe_trigger, raise EPIPE.
+        FakeSocket.__init__(self, text)
+        self.pipe_trigger = pipe_trigger
+
+    def sendall(self, data):
+        if self.pipe_trigger in data:
+            raise socket.error(errno.EPIPE, "gotcha")
+        self.data += data
+
+    def close(self):
+        pass
+
 class NoEOFStringIO(io.BytesIO):
     """Like StringIO, but raises AssertionError on EOF.
 
@@ -213,6 +229,20 @@ class BasicTest(TestCase):
         finally:
             resp.close()
 
+    def test_epipe(self):
+        sock = EPipeSocket(
+            "HTTP/1.0 401 Authorization Required\r\n"
+            "Content-type: text/html\r\n"
+            "WWW-Authenticate: Basic realm=\"example\"\r\n",
+            b"Content-Length")
+        conn = client.HTTPConnection("example.com")
+        conn.sock = sock
+        self.assertRaises(socket.error,
+                          lambda: conn.request("PUT", "/url", "body"))
+        resp = conn.getresponse()
+        self.assertEqual(401, resp.status)
+        self.assertEqual("Basic realm=\"example\"",
+                         resp.getheader("www-authenticate"))
 
 class OfflineTest(TestCase):
     def test_responses(self):
@@ -277,7 +307,7 @@ class RequestBodyTest(TestCase):
 
     def setUp(self):
         self.conn = client.HTTPConnection('example.com')
-        self.sock = FakeSocket("")
+        self.conn.sock = self.sock = FakeSocket("")
         self.conn.sock = self.sock
 
     def get_headers_and_fp(self):