If we read nothing (EOF) after sending a request on a...

net/base/ssl_client_socket.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/base/ssl_client_socket.h"
 
 #include <schnlsp.h>
 
 #include "base/singleton.h"
 #include "base/string_util.h"
@@ skipping 141 matching lines @@
   }
   if (server_cert_)
     CertFreeCertificateContext(server_cert_);
 
   // TODO(wtc): reset more members?
   bytes_decrypted_ = 0;
   bytes_received_ = 0;
 }
 
 bool SSLClientSocket::IsConnected() const {
+  // Ideally, we should also check if we have received the close_notify alert
+  // message from the server, and return false in that case.  We're not doing
+  // that, so this function may return a false positive.  Since the upper
+  // layer (HttpNetworkTransaction) needs to handle a persistent connection
+  // closed by the server when we send a request anyway, a false positive in
+  // exchange for simpler code is a good trade-off.
   return completed_handshake_ && transport_->IsConnected();
 }
 
 int SSLClientSocket::Read(char* buf, int buf_len,
                           CompletionCallback* callback) {
   DCHECK(completed_handshake_);
   DCHECK(next_state_ == STATE_NONE);
   DCHECK(!user_callback_);
 
   // If we have surplus decrypted plaintext, satisfy the Read with it without
@@ skipping 693 matching lines @@
   if (policy_status.dwError)
     return MapSecurityError(policy_status.dwError);
 
   CertFreeCertificateChain(chain_context);
 
   return OK;
 }
 
 }  // namespace net