Implement support for MLSD FTP command in FtpNetworkTransaction.

This way we can request the better-parseable MLSD listing,
and in case it doesn't work fall back to LIST command.

TEST=Covered by net_unittests.
BUG=29691

Review URL: http://codereview.chromium.org/500134

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@35141 0039d316-1c4b-4281-b951-d872f2087c98

net/ftp/ftp_network_transaction.cc

@@ -259,6 +259,9 @@ int FtpNetworkTransaction::ProcessCtrlResponse() {
     case COMMAND_CWD:
       rv = ProcessResponseCWD(response);
       break;
+    case COMMAND_MLSD:
+      rv = ProcessResponseMLSD(response);
+      break;
     case COMMAND_LIST:
       rv = ProcessResponseLIST(response);
       break;
@@ -282,6 +285,9 @@ int FtpNetworkTransaction::ProcessCtrlResponse() {
       case COMMAND_RETR:
         rv = ProcessResponseRETR(response);
         break;
+      case COMMAND_MLSD:
+        rv = ProcessResponseMLSD(response);
+        break;
       case COMMAND_LIST:
         rv = ProcessResponseLIST(response);
         break;
@@ -438,6 +444,10 @@ int FtpNetworkTransaction::DoLoop(int result) {
         DCHECK(rv == OK);
         rv = DoCtrlWriteCWD();
         break;
+      case STATE_CTRL_WRITE_MLSD:
+        DCHECK(rv == 0);
+        rv = DoCtrlWriteMLSD();
+        break;
       case STATE_CTRL_WRITE_LIST:
         DCHECK(rv == OK);
         rv = DoCtrlWriteLIST();
@@ -989,7 +999,7 @@ int FtpNetworkTransaction::ProcessResponseCWD(const FtpCtrlResponse& response) {
     case ERROR_CLASS_INITIATED:
       return Stop(ERR_INVALID_RESPONSE);
     case ERROR_CLASS_OK:
-      next_state_ = STATE_CTRL_WRITE_LIST;
+      next_state_ = STATE_CTRL_WRITE_MLSD;
       break;
     case ERROR_CLASS_INFO_NEEDED:
       return Stop(ERR_INVALID_RESPONSE);
@@ -1011,6 +1021,38 @@ int FtpNetworkTransaction::ProcessResponseCWD(const FtpCtrlResponse& response) {
   return OK;
 }
 
+// MLSD command
+int FtpNetworkTransaction::DoCtrlWriteMLSD() {
+  next_state_ = STATE_CTRL_READ;
+  return SendFtpCommand("MLSD", COMMAND_MLSD);
+}
+
+int FtpNetworkTransaction::ProcessResponseMLSD(
+    const FtpCtrlResponse& response) {
+  switch (GetErrorClass(response.status_code)) {
+    case ERROR_CLASS_INITIATED:
+      response_.is_directory_listing = true;
+      next_state_ = STATE_CTRL_READ;
+      break;
+    case ERROR_CLASS_OK:
+      response_.is_directory_listing = true;
+      next_state_ = STATE_CTRL_WRITE_QUIT;
+      break;
+    case ERROR_CLASS_INFO_NEEDED:
+      return Stop(ERR_INVALID_RESPONSE);
+    case ERROR_CLASS_TRANSIENT_ERROR:
+    case ERROR_CLASS_PERMANENT_ERROR:
+      // Fallback to the LIST command, more widely supported,
+      // but without a specified output format.
+      next_state_ = STATE_CTRL_WRITE_LIST;
+      break;
+    default:
+      NOTREACHED();
+      return Stop(ERR_UNEXPECTED);
+  }
+  return OK;
+}
+
 // LIST command
 int FtpNetworkTransaction::DoCtrlWriteLIST() {
   std::string command(system_type_ == SYSTEM_TYPE_VMS ? "LIST *.*;0" : "LIST");
@@ -1023,6 +1065,7 @@ int FtpNetworkTransaction::ProcessResponseLIST(
   switch (GetErrorClass(response.status_code)) {
     case ERROR_CLASS_INITIATED:
       response_.is_directory_listing = true;
+      next_state_ = STATE_CTRL_READ;
       break;
     case ERROR_CLASS_OK:
       response_.is_directory_listing = true;

net/ftp/ftp_network_transaction.h

@@ -57,6 +57,7 @@ class FtpNetworkTransaction : public FtpTransaction {
     COMMAND_SIZE,
     COMMAND_RETR,
     COMMAND_CWD,
+    COMMAND_MLSD,
     COMMAND_LIST,
     COMMAND_MDTM,
     COMMAND_QUIT
@@ -151,6 +152,8 @@ class FtpNetworkTransaction : public FtpTransaction {
   int ProcessResponseSIZE(const FtpCtrlResponse& response);
   int DoCtrlWriteCWD();
   int ProcessResponseCWD(const FtpCtrlResponse& response);
+  int DoCtrlWriteMLSD();
+  int ProcessResponseMLSD(const FtpCtrlResponse& response);
   int DoCtrlWriteLIST();
   int ProcessResponseLIST(const FtpCtrlResponse& response);
   int DoCtrlWriteMDTM();
@@ -240,6 +243,7 @@ class FtpNetworkTransaction : public FtpTransaction {
     STATE_CTRL_WRITE_RETR,
     STATE_CTRL_WRITE_SIZE,
     STATE_CTRL_WRITE_CWD,
+    STATE_CTRL_WRITE_MLSD,
     STATE_CTRL_WRITE_LIST,
     STATE_CTRL_WRITE_MDTM,
     STATE_CTRL_WRITE_QUIT,

net/ftp/ftp_network_transaction_unittest.cc

@@ -39,6 +39,7 @@ class FtpSocketDataProvider : public DynamicSocketDataProvider {
     PRE_PASV,
     PRE_SIZE,
     PRE_MDTM,
+    PRE_MLSD,
     PRE_LIST,
     PRE_RETR,
     PRE_PASV2,
@@ -174,9 +175,12 @@ class FtpSocketDataProviderDirectoryListing : public FtpSocketDataProvider {
                       "550 Can't download directory\r\n");
 
       case PRE_CWD:
-        return Verify("CWD /\r\n", data, PRE_LIST, "200 OK\r\n");
+        return Verify("CWD /\r\n", data, PRE_MLSD, "200 OK\r\n");
+      case PRE_MLSD:
+        return Verify("MLSD\r\n", data, PRE_QUIT,
+                      "150 Accepted data connection\r\n"
+                      "226 MLSD complete\r\n");
       case PRE_LIST:
-        // TODO(phajdan.jr): Also test with "150 Accepted Data Connection".
         return Verify("LIST\r\n", data, PRE_QUIT, "200 OK\r\n");
       default:
         return FtpSocketDataProvider::OnWrite(data);
@@ -211,8 +215,10 @@ class FtpSocketDataProviderVMSDirectoryListing : public FtpSocketDataProvider {
         return Verify("RETR ANONYMOUS_ROOT:[000000]dir\r\n", data, PRE_PASV2,
                       "550 Can't download directory\r\n");
       case PRE_CWD:
-        return Verify("CWD ANONYMOUS_ROOT:[dir]\r\n", data, PRE_LIST,
+        return Verify("CWD ANONYMOUS_ROOT:[dir]\r\n", data, PRE_MLSD,
                       "200 OK\r\n");
+      case PRE_MLSD:
+        return Verify("MLSD\r\n", data, PRE_LIST, "500 Invalid command\r\n");
       case PRE_LIST:
         return Verify("LIST *.*;0\r\n", data, PRE_QUIT, "200 OK\r\n");
       default:
@@ -249,8 +255,10 @@ class FtpSocketDataProviderVMSDirectoryListingRootDirectory
         return Verify("RETR ANONYMOUS_ROOT\r\n", data, PRE_PASV2,
                       "550 Can't download directory\r\n");
       case PRE_CWD:
-        return Verify("CWD ANONYMOUS_ROOT:[000000]\r\n", data, PRE_LIST,
+        return Verify("CWD ANONYMOUS_ROOT:[000000]\r\n", data, PRE_MLSD,
                       "200 OK\r\n");
+      case PRE_MLSD:
+        return Verify("MLSD\r\n", data, PRE_LIST, "500 Invalid command\r\n");
       case PRE_LIST:
         return Verify("LIST *.*;0\r\n", data, PRE_QUIT, "200 OK\r\n");
       default:
@@ -1010,10 +1018,20 @@ TEST_F(FtpNetworkTransactionTest, DirectoryTransactionFileNotFound) {
                         ERR_FILE_NOT_FOUND);
 }
 
-TEST_F(FtpNetworkTransactionTest, DirectoryTransactionFailList) {
+TEST_F(FtpNetworkTransactionTest, DirectoryTransactionFailMlsd) {
   FtpSocketDataProviderDirectoryListing ctrl_socket;
   TransactionFailHelper(&ctrl_socket,
                         "ftp://host",
+                        FtpSocketDataProvider::PRE_MLSD,
+                        FtpSocketDataProvider::PRE_LIST,
+                        "500 Unrecognized command\r\n",
+                        OK);
+}
+
+TEST_F(FtpNetworkTransactionTest, DirectoryTransactionFailList) {
+  FtpSocketDataProviderVMSDirectoryListing ctrl_socket;
+  TransactionFailHelper(&ctrl_socket,
+                        "ftp://host/dir",
                         FtpSocketDataProvider::PRE_LIST,
                         FtpSocketDataProvider::PRE_QUIT,
                         "500 failed list\r\n",