diff options
| author | Joe Robinson <joe@lc8n.com> | 2010-10-27 14:21:09 +0100 |
|---|---|---|
| committer | Joe Robinson <joe@lc8n.com> | 2010-10-27 14:21:09 +0100 |
| commit | 063284837c8c366e5502b1b0264b8eb807b61732 (patch) | |
| tree | fff3a1e1e5afaa671485b9d990704658276627ac /org/apache/commons/net/time/TimeTCPClient.java | |
Basic upload functionality to predifined location, with basic file browser
Diffstat (limited to 'org/apache/commons/net/time/TimeTCPClient.java')
| -rw-r--r-- | org/apache/commons/net/time/TimeTCPClient.java | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/org/apache/commons/net/time/TimeTCPClient.java b/org/apache/commons/net/time/TimeTCPClient.java new file mode 100644 index 0000000..ad10ba5 --- /dev/null +++ b/org/apache/commons/net/time/TimeTCPClient.java @@ -0,0 +1,109 @@ +/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.net.time;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.util.Date;
+
+import org.apache.commons.net.SocketClient;
+
+/***
+ * The TimeTCPClient class is a TCP implementation of a client for the
+ * Time protocol described in RFC 868. To use the class, merely
+ * establish a connection with
+ * {@link org.apache.commons.net.SocketClient#connect connect }
+ * and call either {@link #getTime getTime() } or
+ * {@link #getDate getDate() } to retrieve the time, then
+ * call {@link org.apache.commons.net.SocketClient#disconnect disconnect }
+ * to close the connection properly.
+ * <p>
+ * <p>
+ * @author Daniel F. Savarese
+ * @see TimeUDPClient
+ ***/
+
+public final class TimeTCPClient extends SocketClient
+{
+ /*** The default time port. It is set to 37 according to RFC 868. ***/
+ public static final int DEFAULT_PORT = 37;
+
+ /***
+ * The number of seconds between 00:00 1 January 1900 and
+ * 00:00 1 January 1970. This value can be useful for converting
+ * time values to other formats.
+ ***/
+ public static final long SECONDS_1900_TO_1970 = 2208988800L;
+
+ /***
+ * The default TimeTCPClient constructor. It merely sets the default
+ * port to <code> DEFAULT_PORT </code>.
+ ***/
+ public TimeTCPClient ()
+ {
+ setDefaultPort(DEFAULT_PORT);
+ }
+
+ /***
+ * Retrieves the time from the server and returns it. The time
+ * is the number of seconds since 00:00 (midnight) 1 January 1900 GMT,
+ * as specified by RFC 868. This method reads the raw 32-bit big-endian
+ * unsigned integer from the server, converts it to a Java long, and
+ * returns the value.
+ * <p>
+ * The server will have closed the connection at this point, so you should
+ * call
+ * {@link org.apache.commons.net.SocketClient#disconnect disconnect }
+ * after calling this method. To retrieve another time, you must
+ * initiate another connection with
+ * {@link org.apache.commons.net.SocketClient#connect connect }
+ * before calling <code> getTime() </code> again.
+ * <p>
+ * @return The time value retrieved from the server.
+ * @exception IOException If an error occurs while fetching the time.
+ ***/
+ public long getTime() throws IOException
+ {
+ DataInputStream input;
+ input = new DataInputStream(_input_);
+ return (input.readInt() & 0xffffffffL);
+ }
+
+ /***
+ * Retrieves the time from the server and returns a Java Date
+ * containing the time converted to the local timezone.
+ * <p>
+ * The server will have closed the connection at this point, so you should
+ * call
+ * {@link org.apache.commons.net.SocketClient#disconnect disconnect }
+ * after calling this method. To retrieve another time, you must
+ * initiate another connection with
+ * {@link org.apache.commons.net.SocketClient#connect connect }
+ * before calling <code> getDate() </code> again.
+ * <p>
+ * @return A Date value containing the time retrieved from the server
+ * converted to the local timezone.
+ * @exception IOException If an error occurs while fetching the time.
+ ***/
+ public Date getDate() throws IOException
+ {
+ return new Date((getTime() - SECONDS_1900_TO_1970)*1000L);
+ }
+
+}
+
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