Correctly handle FTP servers which unexpectedly close the control connection.

net/ftp/ftp_network_transaction_unittest.cc

 // Copyright (c) 2009 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/ftp/ftp_network_transaction.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <ws2tcpip.h>
@@ skipping 484 matching lines @@
     }
   }
 
  private:
   const char* expected_user_;
   const char* expected_password_;
 
   DISALLOW_COPY_AND_ASSIGN(FtpMockControlSocketEvilLogin);
 };
 
+class FtpMockControlSocketCloseConnection : public FtpMockControlSocket {
+ public:
+  FtpMockControlSocketCloseConnection() {
+  }
+  
+  virtual MockWriteResult OnWrite(const std::string& data) {
+    if (InjectFault())
+      return MockWriteResult(true, data.length());
+    switch (state()) {
+      case PRE_USER:
+        return Verify("USER anonymous\r\n", data,
+                      PRE_QUIT, "");
+      default:
+        return FtpMockControlSocket::OnWrite(data);
+    }
+  }
+  
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FtpMockControlSocketCloseConnection);
+};
+
 class FtpNetworkTransactionTest : public PlatformTest {
  public:
   FtpNetworkTransactionTest()
       : host_resolver_(new MockHostResolver),
         session_(new FtpNetworkSession(host_resolver_)),
         transaction_(session_.get(), &mock_socket_factory_) {
   }
 
  protected:
   FtpRequestInfo GetRequestInfo(const std::string& url) {
@@ skipping 327 matching lines @@
                                                          &callback_));
   EXPECT_EQ(ERR_MALFORMED_IDENTITY, callback_.WaitForResult());
 }
 
 TEST_F(FtpNetworkTransactionTest, Escaping) {
   FtpMockControlSocketEscaping ctrl_socket;
   ExecuteTransaction(&ctrl_socket, "ftp://host/%20%21%22%23%24%25%79%80%81",
                      OK);
 }
 
+// Regression test for http://crbug.com/25023.
+TEST_F(FtpNetworkTransactionTest, CloseConnection) {
+  FtpMockControlSocketCloseConnection ctrl_socket;
+  ExecuteTransaction(&ctrl_socket, "ftp://host", ERR_EMPTY_RESPONSE);
+}
+
 TEST_F(FtpNetworkTransactionTest, DirectoryTransactionFailUser) {
   FtpMockControlSocketDirectoryListing ctrl_socket;
   TransactionFailHelper(&ctrl_socket,
                         "ftp://host",
                         FtpMockControlSocket::PRE_USER,
                         FtpMockControlSocket::PRE_QUIT,
                         "500 no such user\r\n",
                         ERR_FAILED);
 }
 
@@ skipping 191 matching lines @@
   FtpMockControlSocketFileDownloadRetrFail ctrl_socket;
   TransactionFailHelper(&ctrl_socket,
                         "ftp://host/file",
                         FtpMockControlSocket::PRE_RETR,
                         FtpMockControlSocket::PRE_PASV2,
                         "550 cannot open file\r\n",
                         ERR_FILE_NOT_FOUND);
 }
 
 }  // namespace net