fix for ftp client: suppress bad directory listing time-out

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7348 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/net/yacy/cora/protocol/ftp/FTPClient.java

@@ -1347,12 +1347,12 @@ public class FTPClient {
         // read file system data
         String line;
         final ArrayList<String> files = new ArrayList<String>();
+        try {
             while ((line = ClientStream.readLine()) != null) {
                 if (!line.startsWith("total ")) {
                     files.add(line);
                 }
             }
-
             // after stream is empty we should get control completion echo
             /*reply =*/ receive();
 
@@ -1361,9 +1361,8 @@ public class FTPClient {
             // shutdown connection
             ClientStream.close(); // Closing the returned InputStream will
             closeDataSocket(); // close the associated socket.
-
-        // if (!success) throw new IOException(reply);
-
+        } catch (IOException e) {
+        }
         files.trimToSize();
         return files;
     }
@@ -2518,33 +2517,25 @@ public class FTPClient {
         }
     }
 
-    public StringBuilder dirhtml(String remotePath) {
+    public StringBuilder dirhtml(String remotePath) throws IOException {
         // returns a directory listing using an existing connection
-        try {
             if (isFolder(remotePath) && '/' != remotePath.charAt(remotePath.length()-1)) {
                 remotePath += '/';
             }
+            String pwd = pwd();
             final List<String> list = list(remotePath, true);
-            if (remotesystem == null) {
-                sys();
-            }
+            if (remotesystem == null) try {sys();} catch (IOException e) {}
             final String base = "ftp://" + ((account.equals("anonymous")) ? "" : (account + ":" + password + "@"))
-                    + host + ((port == 21) ? "" : (":" + port)) + ((remotePath.length() > 0 && remotePath.charAt(0) == '/') ? "" : pwd() + "/")
+                    + host + ((port == 21) ? "" : (":" + port)) + ((remotePath.length() > 0 && remotePath.charAt(0) == '/') ? "" : pwd + "/")
                     + remotePath;
 
             return dirhtml(base, remotemessage, remotegreeting, remotesystem, list, true);
-        } catch (final java.security.AccessControlException e) {
-            return null;
-        } catch (final IOException e) {
-            return null;
-        }
     }
 
     public static StringBuilder dirhtml(
             final String host, final int port, final String remotePath,
-            final String account, final String password) {
+            final String account, final String password) throws IOException {
         // opens a new connection and returns a directory listing as html
-        try {
         final FTPClient c = new FTPClient();
         c.open(host, port);
         c.login(account, password);
@@ -2552,11 +2543,6 @@ public class FTPClient {
         final StringBuilder page = c.dirhtml(remotePath);
         c.quit();
         return page;
-        } catch (final java.security.AccessControlException e) {
-            return null;
-        } catch (final IOException e) {
-            return null;
-        }
     }
 
     public static StringBuilder dirhtml(
@@ -2619,12 +2605,11 @@ public class FTPClient {
         dir(host, remotePath, "anonymous", "anomic");
     }
 
-    public static void dirAnonymousHtml(final String host, final int port, final String remotePath,
-            final String htmloutfile) {
+    public static void dirAnonymousHtml(final String host, final int port, final String remotePath, final String htmloutfile) {
+        try {
             final StringBuilder page = dirhtml(host, port, remotePath, "anonymous", "anomic");
             final File file = new File(htmloutfile);
             FileOutputStream fos;
-        try {
             fos = new FileOutputStream(file);
             fos.write(page.toString().getBytes());
             fos.close();