FTP: a successful response to SIZE does not mean the resource is a file.

net/ftp/ftp_network_transaction.cc

 // Copyright (c) 2010 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 "base/compiler_specific.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
@@ skipping 960 matching lines @@
       break;
     case ERROR_CLASS_OK:
       if (response.lines.size() != 1)
         return Stop(ERR_INVALID_RESPONSE);
       int64 size;
       if (!base::StringToInt64(response.lines[0], &size))
         return Stop(ERR_INVALID_RESPONSE);
       if (size < 0)
         return Stop(ERR_INVALID_RESPONSE);
 
-      // Some FTP servers respond with success to the SIZE command
-      // for directories, and return 0 size. Make sure we don't set
-      // the resource type to file if that's the case.
-      if (size > 0) {
-        response_.expected_content_size = size;
-        resource_type_ = RESOURCE_TYPE_FILE;
-      }
+      // A successful response to SIZE does not mean the resource is a file.
+      // Some FTP servers (for example, the qnx one) send a SIZE even for
+      // directories.
+      response_.expected_content_size = size;
       break;
     case ERROR_CLASS_INFO_NEEDED:
       break;
     case ERROR_CLASS_TRANSIENT_ERROR:
       break;
     case ERROR_CLASS_PERMANENT_ERROR:
       // It's possible that SIZE failed because the path is a directory.
       if (resource_type_ == RESOURCE_TYPE_UNKNOWN &&
           response.status_code != 550) {
         return Stop(GetNetErrorCodeForFtpResponseCode(response.status_code));
@@ skipping 341 matching lines @@
   if (!had_error_type[type]) {
     had_error_type[type] = true;
     UMA_HISTOGRAM_ENUMERATION("Net.FtpDataConnectionErrorHappened",
         type, NUM_OF_NET_ERROR_TYPES);
   }
   UMA_HISTOGRAM_ENUMERATION("Net.FtpDataConnectionErrorCount",
       type, NUM_OF_NET_ERROR_TYPES);
 }
 
 }  // namespace net