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-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 @@ def send(self, str):
         #       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 @@ def endheaders(self, message_body=None):
 
     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 @@ def _set_content_length(self, body):
         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 @@ def _set_content_length(self, body):
             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 @@ def __init__(self, host, port=None, key_file=None, cert_file=None,
         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

@@ -1,3 +1,4 @@
+import errno
 from http import client
 import io
 import socket
@@ -24,6 +25,21 @@ def makefile(self, mode, bufsize=None):
             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 @@ def test_incomplete_read(self):
         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):