Writing binary data to ASP file from applet through URLConnection
Hi Everybody,
I am facing a proble with HttpURLConnection.I want to write some binary data from applet to an ASP file.The other end ASP file read this binary data and process , Here problem is I have opened URLConnection to the page and Created OutputStream and writing byte by Write() method But other end we are not getting bytes...we are not getting error too at java side..can any body help me..do we need to set any property to URLConnection...here I am giving sample code...
OutputStream os;
URL uConnect2;
HttpURLConnection hucConnect2;
uConnect2= new URL("http://webserver/vnc/sendtoserver.asp?"); hucConnect2=(HttpURLConnection)uConnect2.openConnection();
hucConnect2.setDoOutput(true);
hucConnect2.setRequestMethod("POST")
os=new DataOutputStream(hucConnect2.getOutputStream());
os.writeBytes("Hello");
Thanks in Advance
Madhav
Do you remember to flush() and close() the stream?
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Writing binary data to a file without carriage returns every 512 bytes
Is there a VI for writing binary data to a file without carriage returns being inserted every 512 bytes?
ThanksHi Momolxg,
I could be way off on this. I tried to simulate what you've done by
making a for loop that would run a set number of times. For my example I
used 1025. I wired the iteration terminal to a 'Write to SGL File.vi'
outside the loop with indexing enabled. It wrote the SGL data from 0 to
1024 to the file. I then read the file with a 'Read Characters from
File.vi' and searched the output for a carriage return (0D hex). It was
found five times. The reason why was the SGL number it was reading had a
13 (0D hex) in it. Perhaps you're running into a similar problem?
I tried it again, this time using the 'Write to I16 File.vi'. The
carriage return was found five times: the 28th character the first time
then on the 512th character four consecutive time
s after that. I suppose
that makes sense that you'd find a 0D in the numbers at equal spacings if
they're incrementing this way... In this case the carriage returns you're
seeing are actually numbers from your data.
One big difference is that I'm using a set pattern of numbers. This
doesn't appear to be your case. Is there a better way we can duplicate
your problem? It sounds interesting. Again my simulation could be way
off. (I'm also running this on LV60 for Linux so my results could be
different)
- Kevin
In article <[email protected]>,
"momolxg" wrote:
> Is there a VI for writing binary data to a file without carriage returns
> being inserted every 512 bytes? Thanks -
Playing an audio file from applet
Hi friends,
I have a problem to be solved .
Please help me.
I have to play an audio file from applet.When the applet loads it shold start playing .There is a progress bar in the applet it shold alsomove corresponding to that.
How can i do that.Give me an idea.
I know nothing about jmf.
I am using j2sdk1.4,windows 2000 server.Andrew,
Forgive my naivety, but i struggle with JAVA! I am desperately trying to create a JAVA plugin to SERVOY and have to date been successful with a few things. Record, Playback, convert to .spx.
I am really struggling with implementing a rewind and fastforward function of the type you have. I thought it would be easy, but it appears not.
At the bottom is the complete code from my class that is called by the servoy plugin wrapper,
i had thought that adding some simple jump 500 ms would have been easy in something like this:
public AudioStream js_FastForward (AudioStream as) throws IOException {
!!! Line or two here to move the play head forward !!!
AudioPlayer.player.start(as);
return as;
Can you give me any pointers to how i code that fast forward bit.
many thanks
David
package com.d2e.MyPlugin;
import com.servoy.j2db.scripting.IScriptObject;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.awt.Button;
import javax.sound.sampled.*;
import org.xiph.speex.*;
import org.xiph.speex.spi.*;
import sun.audio.*; //import the sun.audio package
public class MyPluginProvider implements IScriptObject {
public void JSencode()
throws IOException{
/** Version of the Speex Encoder */
final String VERSION = "Java Speex Command Line Encoder v0.9.7 ($Revision: 1.5 $)";
/** Copyright display String */
final String COPYRIGHT = "Copyright (C) 2002-2004 Wimba S.A.";
/** Print level for messages : Print debug information */
final int DEBUG = 0;
/** Print level for messages : Print basic information */
final int INFO = 1;
/** Print level for messages : Print only warnings and errors */
final int WARN = 2;
/** Print level for messages : Print only errors */
final int ERROR = 3;
int printlevel = INFO;
/** File format for input or output audio file: Raw */
final int FILE_FORMAT_RAW = 0;
/** File format for input or output audio file: Ogg */
final int FILE_FORMAT_OGG = 1;
/** File format for input or output audio file: Wave */
final int FILE_FORMAT_WAVE = 2;
int srcFormat = FILE_FORMAT_OGG;
int destFormat = FILE_FORMAT_WAVE;
int mode = -1;
int quality = 4;
/** Defines the encoders algorithmic complexity. */
int complexity = 3;
/** Defines the number of frames per speex packet. */
int nframes = 1;
/** Defines the desired bitrate for the encoded audio. */
int bitrate = -1;
/** Defines the sampling rate of the audio input. */
int sampleRate = -1;
/** Defines the number of channels of the audio input (1=mono, 2=stereo). */
int channels = 1;
/** Defines the encoder VBR quality setting (float from 0 to 10). */
float vbr_quality = -1;
/** Defines whether or not to use VBR (Variable Bit Rate). */
boolean vbr = false;
/** Defines whether or not to use VAD (Voice Activity Detection). */
boolean vad = false;
/** Defines whether or not to use DTX (Discontinuous Transmission). */
boolean dtx = false;
//HArd code src format and dest
// private String srcPath ="junk.wav";
srcFormat = FILE_FORMAT_WAVE;
destFormat = FILE_FORMAT_OGG;
//destPath="junk.spx";
byte[] temp = new byte[2560]; // stereo UWB requires one to read 2560b
final int HEADERSIZE = 8;
final String RIFF = "RIFF";
final String WAVE = "WAVE";
final String FORMAT = "fmt ";
final String DATA = "data";
final int WAVE_FORMAT_PCM = 0x0001;
// Open the input stream
DataInputStream dis = new DataInputStream(new FileInputStream("junk.wav"));
// Prepare input stream
//DP - Sort out the Wave File
// read the WAVE header
dis.readFully(temp, 0, HEADERSIZE+4);
// Read other header chunks
dis.readFully(temp, 0, HEADERSIZE);
String chunk = new String(temp, 0, 4);
int size = readInt(temp, 4);
while (!chunk.equals(DATA)) {
dis.readFully(temp, 0, size);
if (chunk.equals(FORMAT)) {
typedef struct waveformat_extended_tag {
WORD wFormatTag; // format type
WORD nChannels; // number of channels (i.e. mono, stereo...)
DWORD nSamplesPerSec; // sample rate
DWORD nAvgBytesPerSec; // for buffer estimation
WORD nBlockAlign; // block size of data
WORD wBitsPerSample; // Number of bits per sample of mono data
WORD cbSize; // The count in bytes of the extra size
} WAVEFORMATEX;
if (readShort(temp, 0) != WAVE_FORMAT_PCM) {
System.err.println("Not a PCM file");
return;
channels = readShort(temp, 2);
sampleRate = readInt(temp, 4);
if (readShort(temp, 14) != 16) {
System.err.println("Not a 16 bit file " + readShort(temp, 18));
return;
// Display audio info
if (printlevel <= DEBUG) {
System.out.println("File Format: PCM wave");
System.out.println("Sample Rate: " + sampleRate);
System.out.println("Channels: " + channels);
dis.readFully(temp, 0, HEADERSIZE);
chunk = new String(temp, 0, 4);
size = readInt(temp, 4);
if (printlevel <= DEBUG) System.out.println("Data size: " + size);
//DP ENd sort wave file
//Now Choose the mode , we have a file sampled at 44100
mode = 2; // Ultra-wideband
// Construct a new encoder
SpeexEncoder speexEncoder = new SpeexEncoder();
speexEncoder.init(mode, quality, sampleRate, channels);
if (complexity > 0) {
speexEncoder.getEncoder().setComplexity(complexity);
if (bitrate > 0) {
speexEncoder.getEncoder().setBitRate(bitrate);
if (vbr) {
speexEncoder.getEncoder().setVbr(vbr);
if (vbr_quality > 0) {
speexEncoder.getEncoder().setVbrQuality(vbr_quality);
if (vad) {
speexEncoder.getEncoder().setVad(vad);
if (dtx) {
speexEncoder.getEncoder().setDtx(dtx);
// Display info
// Open the file writer
AudioFileWriter writer;
if (destFormat == FILE_FORMAT_OGG) {
writer = new OggSpeexWriter(mode, sampleRate, channels, nframes, vbr);
else if (destFormat == FILE_FORMAT_WAVE) {
nframes = PcmWaveWriter.WAVE_FRAME_SIZES[mode-1][channels-1][quality];
writer = new PcmWaveWriter(mode, quality, sampleRate, channels, nframes, vbr);
else {
writer = new RawWriter();
writer.open("junk.spx");
writer.writeHeader("Encoded with: " + VERSION);
int pcmPacketSize = 2 * channels * speexEncoder.getFrameSize();
try {
// read until we get to EOF
while (true) {
dis.readFully(temp, 0, nframes*pcmPacketSize);
for (int i=0; i<nframes; i++)
speexEncoder.processData(temp, i*pcmPacketSize, pcmPacketSize);
int encsize = speexEncoder.getProcessedData(temp, 0);
if (encsize > 0) {
writer.writePacket(temp, 0, encsize);
catch (EOFException e) {}
writer.close();
dis.close();
* Converts Little Endian (Windows) bytes to an int (Java uses Big Endian).
* @param data the data to read.
* @param offset the offset from which to start reading.
* @return the integer value of the reassembled bytes.
protected static int readInt(final byte[] data, final int offset)
return (data[offset] & 0xff) |
((data[offset+1] & 0xff) << 8) |
((data[offset+2] & 0xff) << 16) |
(data[offset+3] << 24); // no 0xff on the last one to keep the sign
* Converts Little Endian (Windows) bytes to an short (Java uses Big Endian).
* @param data the data to read.
* @param offset the offset from which to start reading.
* @return the integer value of the reassembled bytes.
protected static int readShort(final byte[] data, final int offset)
return (data[offset] & 0xff) |
(data[offset+1] << 8); // no 0xff on the last one to keep the sign
AudioFormat audioFormat;
TargetDataLine targetDataLine;
public Class[] getAllReturnedTypes() {
// TODO Auto-generated method stub
return null;
public String[] getParameterNames(String arg0) {
// TODO Auto-generated method stub
return null;
public String getSample(String arg0) {
// TODO Auto-generated method stub
return null;
public String getToolTip(String arg0) {
// TODO Auto-generated method stub
return null;
public boolean isDeprecated(String arg0) {
// TODO Auto-generated method stub
return false;
public String js_Record (String name){
captureAudio();
return "Started Recording " +name;
public String js_StopRecord (String name) throws IOException{
//new ActionListener(){
// public void actionPerformed(ActionEvent e)
//Terminate the capturing of input data
// from the microphone.
targetDataLine.stop();
targetDataLine.close();
// }//end actionPerformed
//};//end ActionListener
// JSpeexEnc ("junk.wav","output.spx");
JSencode();
return "Stop Records " +name;
//Play audio file
public AudioStream js_Playback (String name) throws IOException{
InputStream in = new FileInputStream("junk.wav");
AudioStream as = new AudioStream(in);
AudioPlayer.player.start(as);
return as;
public AudioStream js_ContPlay (AudioStream as) throws IOException {
AudioPlayer.player.start(as);
return as;
//Stop Play
public AudioStream js_Stop_Playback (AudioStream as) throws IOException{
AudioPlayer.player.stop(as);
return as;
//This method captures audio input from a
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private void captureAudio(){
try{
//Get things set up for capture
audioFormat = getAudioFormat();
DataLine.Info dataLineInfo =
new DataLine.Info(
TargetDataLine.class,
audioFormat);
targetDataLine = (TargetDataLine)
AudioSystem.getLine(dataLineInfo);
//Create a thread to capture the microphone
// data into an audio file and start the
// thread running. It will run until the
// Stop button is clicked. This method
// will return after starting the thread.
new CaptureThread().start();
}catch (Exception e) {
e.printStackTrace();
System.exit(0);
}//end catch
}//end captureAudio method
// This method creates and returns an
// AudioFormat object for a given set of format
// parameters. If these parameters don't work
// well for you, try some of the other
// allowable parameter values, which are shown
// in comments following the declarations.
private AudioFormat getAudioFormat(){
float sampleRate = 44100.0F;
//8000,11025,16000,22050,44100
int sampleSizeInBits = 16;
//8,16
int channels = 1;
//1,2
boolean signed = true;
//true,false
boolean bigEndian = true;
//true,false
return new AudioFormat(sampleRate,
sampleSizeInBits,
channels,
signed,
bigEndian);
}//end getAudioFormat
class CaptureThread extends Thread{
public void run(){
AudioFileFormat.Type fileType = null;
File audioFile = null;
//Set the file type and the file extension
// based on the selected radio button.
//if(aifcBtn.isSelected()){
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// }else if(aiffBtn.isSelected()){
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// audioFile = new File("junk.aif");
// }else if(auBtn.isSelected()){
// fileType = AudioFileFormat.Type.AU;
// audioFile = new File("junk.au");
// }else if(sndBtn.isSelected()){
// fileType = AudioFileFormat.Type.SND;
// audioFile = new File("junk.snd");
// }else if(waveBtn.isSelected()){
fileType = AudioFileFormat.Type.WAVE;
audioFile = new File("junk.wav");
// }//end if
try{
targetDataLine.open(audioFormat);
targetDataLine.start();
AudioSystem.write(
new AudioInputStream(targetDataLine),
fileType,
audioFile);
}catch (Exception e){
e.printStackTrace();
}//end catch
}//end run
}//end inner class CaptureThread
} -
How can I get data in flat file from Pool table and cluster table ?
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<bindingFault xmlns="http://schemas.oracle.com/bpel/extension">
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<code>null</code>
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KarthiKThank u very much,
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dp_timeout = 16
OTHERS = 17.
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TEXT MODE ENCODING DEFAULT.
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Lim.... -
Hi,
I need to open html file from applet, the html file is placed in my local system, it is not open. the code is below, please can u tell where i did wrong.
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
<applet code="Resource.class" width="400" height="400"></applet>
public class Resource extends Applet implements ActionListener
Button b = null;
public void init(){
b= new Button("Click");
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b.addActionListener(this);
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http://forum.java.sun.com/thread.jspa?threadID=633500 -
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Anybody suggest me how to delete archive log files from ASM through Grid Control.
ThanksIt is important to specify both, the oracle version and os version when posting, so confusions can be avoided.
In this particular case, since you are referring to asm and grid control you could be talking about either 10gR1, 10gR2 or 11gR1; but I strongly suggest you to avoid us to be guessing. In either case, you sould go to the maintenance tab of the target database and program a scheduled 'delete noprompt obsolete;' procedure. This will purge the information stored at the Flash recovery area, which I assume you have declared inside the ASM.
~ Madrid
http://hrivera99.blogspot.com/ -
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hi all,
how to upload and download any file from plsql through weblogic server? i am using oracle 10g express edition and jboss.
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MSORAhi bala ,
for a windown server u can use VNC (virtual network connection) which opens a session on u r desktop later u can drag and drop form there vice versa and for a linux box you can use Win SCP which helps to open a session with interface to u r desktop in both cases you can upload and down load files very easiy just as we drag and drop items in a simple pc .. we use the same technique...
bye
vamshi -
Writing Image files from Applet to Servlet
How to write ImageFiles from an Applet to a Servlet?
I draw a image on a JComponent in Applet and wanted to save the image file in the server.
I am unable to write an Image Object to the Servlet as the BufferedImage class is not serialized.
I tried writing the image to the Servlet output stream and tried reading the data in the servlet and writing the data to a jpg file.
But the files is not being written as proper jpeg file.
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Thanks,
Sridhar.I get the following exception below when i try to write a Serialized object from an applet to the servlet.
I copied the serialized class jar file to the tomcat webserver lib folder.
The serialized class has a BufferedImage object.
Serialized Class Code
public class SerializedImage implements Serializable{
private BufferedImage im = null;
public SerializedImage() {
super();
public BufferedImage getSerializedObject() {
return im;
public void setSerializedObject((BufferedImage im) {
this.im = im;
private BufferedImage fromByteArray(byte[] imagebytes) {
try {
if (imagebytes != null && (imagebytes.length > 0)) {
BufferedImage im = ImageIO.read(new ByteArrayInputStream(imagebytes));
return im;
return null;
} catch (IOException e) {
throw new IllegalArgumentException(e.toString());
private byte[] toByteArray(BufferedImage o) {
if(o != null) {
BufferedImage image = (BufferedImage)o;
ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
try {
ImageIO.write(image, "jpg", baos);
} catch (IOException e) {
throw new IllegalStateException(e.toString());
byte[] b = baos.toByteArray();
return b;
return new byte[0];
private void writeObject(java.io.ObjectOutputStream out)
throws IOException {
byte[] b = toByteArray(im);
out.writeInt(b.length);
out.write(b);
private void readObject(java.io.ObjectInputStream in)
throws IOException, ClassNotFoundException {
int length = in.readInt();
byte[] b = new byte[length];
in.read(b);
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Exception :
java.io.StreamCorruptedException: unexpected block data
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45)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
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646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
Is there any thing that i am missing or doing wrong?
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Sridhar. -
Writing local files from applet
Hi, I want to write an image file from an applet (appletviewer) to the local file system. Does anyone have any idea how I can do it? I tried using the FilePermission class but failed in doing so.
Thanx for any help in advanceI need to do this too.
Specifically I need to allow the user of an applet to write (text) files to his own local file system.
The applet displays graphical material to the user and I want the user to be able to type in comments to a text box which are then recorded by the applet - and ideally can be retrieved and used by the applet on subsequent occasions - as well as, of course, being available to the user via other programs.
Presumably I need to use a signed applet.
I want this to be as simple as possible so that the user (who will be unsophisticated) can be on Mac, Windows, Unix, Linux etc.
Anyone know a good reference text or tutorial?
(I am currently working with JAVA 2 fourth ed by Herbert Schildt)
HRT -
Storing binary data to a file......
Hi Friends,
I am trying to make a webapp in which users can upload Videos and I can store that videos on the server. I have this bit of code:
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception{
VideoUploadForm myForm = (VideoUploadForm)form;
// Process the FormFile
FormFile myFile = myForm.getTheFile();
byte[] fileData = myFile.getFileData();
}My question is, should i store the byte array into some text file???Then how can i read it back and get the original format i.e *.avi or *.mpg.
This might be easy,but this is my first time dealing with binary data,so your help would be appreciated.
Thanks
P.S: Any links would be appreciatedThanks BalusC,
After lots of hardwork finally I am trying to upload the binary file in the database,but getting this error:
java.sql.SQLException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'desc, file_blob) values(1, 1, 'uploaded file from user', _binary'\0\0�!\0\0�\' at line 1
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2928)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1666)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2994)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:936)
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:773)
at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:168)This is my code thats trying to write that binary file:
public class StoreData {
private static Log log = LogFactory.getLog(StoreData.class);
private static final String INSERT_BLOB = "Insert into videos.files (id, owner_id, desc, file_blob)" +
" values(1, 1, 'uploaded file from user', ?)";
public void WriteData(VideoUploadForm myForm){
log.info("Writing file to database");
Connection conn = ConnectionUtil.getConnection();
PreparedStatement stmt = null;
// Process the FormFile
FormFile myFile = myForm.getTheFile();
byte[] bytes = null;
try{
bytes = myFile.getFileData();
}catch(IOException ie){
log.error("Upload File not Found");
ie.printStackTrace();
InputStream is = new ByteArrayInputStream(bytes);
try {
stmt = conn.prepareStatement(INSERT_BLOB);
stmt.setBinaryStream(1,is,bytes.length);
stmt.execute();
stmt.close();
}catch (Exception e) {
log.error("Error writing data to file:");
e.printStackTrace();
} finally {
ConnectionUtil.closeStatement(stmt);
ConnectionUtil.closeConnection(conn);
}Looking for some help here..... -
Uploading large files from applet to servlet throws out of memory error
I have a java applet that needs to upload files from a client machine
to a web server using a servlet. the problem i am having is that in
the current scheme, files larger than 17-20MB throw an out of memory
error. is there any way we can get around this problem? i will post
the client and server side code for reference.
Client Side Code:
import java.io.*;
import java.net.*;
// this class is a client that enables transfer of files from client
// to server. This client connects to a servlet running on the server
// and transmits the file.
public class fileTransferClient
private static final String FILENAME_HEADER = "fileName";
private static final String FILELASTMOD_HEADER = "fileLastMod";
// this method transfers the prescribed file to the server.
// if the destination directory is "", it transfers the file to
"d:\\".
//11-21-02 Changes : This method now has a new parameter that
references the item
//that is being transferred in the import list.
public static String transferFile(String srcFileName, String
destFileName,
String destDir, int itemID)
if (destDir.equals(""))
destDir = "E:\\FTP\\incoming\\";
// get the fully qualified filename and the mere filename.
String fqfn = srcFileName;
String fname =
fqfn.substring(fqfn.lastIndexOf(File.separator)+1);
try
//importTable importer = jbInit.getImportTable();
// create the file to be uploaded and a connection to
servlet.
File fileToUpload = new File(fqfn);
long fileSize = fileToUpload.length();
// get last mod of this file.
// The last mod is sent to the servlet as a header.
long lastMod = fileToUpload.lastModified();
String strLastMod = String.valueOf(lastMod);
URL serverURL = new URL(webadminApplet.strServletURL);
URLConnection serverCon = serverURL.openConnection();
// a bunch of connection setup related things.
serverCon.setDoInput(true);
serverCon.setDoOutput(true);
// Don't use a cached version of URL connection.
serverCon.setUseCaches (false);
serverCon.setDefaultUseCaches (false);
// set headers and their values.
serverCon.setRequestProperty("Content-Type",
"application/octet-stream");
serverCon.setRequestProperty("Content-Length",
Long.toString(fileToUpload.length()));
serverCon.setRequestProperty(FILENAME_HEADER, destDir +
destFileName);
serverCon.setRequestProperty(FILELASTMOD_HEADER, strLastMod);
if (webadminApplet.DEBUG) System.out.println("Connection with
FTP server established");
// create file stream and write stream to write file data.
FileInputStream fis = new FileInputStream(fileToUpload);
OutputStream os = serverCon.getOutputStream();
try
// transfer the file in 4K chunks.
byte[] buffer = new byte[4096];
long byteCnt = 0;
//long percent = 0;
int newPercent = 0;
int oldPercent = 0;
while (true)
int bytes = fis.read(buffer);
byteCnt += bytes;
//11-21-02 :
//If itemID is greater than -1 this is an import file
transfer
//otherwise this is a header graphic file transfer.
if (itemID > -1)
newPercent = (int) ((double) byteCnt/ (double)
fileSize * 100.0);
int diff = newPercent - oldPercent;
if (newPercent == 0 || diff >= 20)
oldPercent = newPercent;
jbInit.getImportTable().displayFileTransferStatus
(itemID,
newPercent);
if (bytes < 0) break;
os.write(buffer, 0, bytes);
os.flush();
if (webadminApplet.DEBUG) System.out.println("No of bytes
sent: " + byteCnt);
finally
// close related streams.
os.close();
fis.close();
if (webadminApplet.DEBUG) System.out.println("File
Transmission complete");
// find out what the servlet has got to say in response.
BufferedReader reader = new BufferedReader(
new
InputStreamReader(serverCon.getInputStream()));
try
String line;
while ((line = reader.readLine()) != null)
if (webadminApplet.DEBUG) System.out.println(line);
finally
// close the reader stream from servlet.
reader.close();
} // end of the big try block.
catch (Exception e)
System.out.println("Exception during file transfer:\n" + e);
e.printStackTrace();
return("FTP failed. See Java Console for Errors.");
} // end of catch block.
return("File: " + fname + " successfully transferred.");
} // end of method transferFile().
} // end of class fileTransferClient
Server side code:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.net.*;
// This servlet class acts as an FTP server to enable transfer of
files
// from client side.
public class FtpServerServlet extends HttpServlet
String ftpDir = "D:\\pub\\FTP\\";
private static final String FILENAME_HEADER = "fileName";
private static final String FILELASTMOD_HEADER = "fileLastMod";
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException,
IOException
doPost(req, resp);
public void doPost(HttpServletRequest req, HttpServletResponse
resp)
throws ServletException,
IOException
// ### for now enable overwrite by default.
boolean overwrite = true;
// get the fileName for this transmission.
String fileName = req.getHeader(FILENAME_HEADER);
// also get the last mod of this file.
String strLastMod = req.getHeader(FILELASTMOD_HEADER);
String message = "Filename: " + fileName + " saved
successfully.";
int status = HttpServletResponse.SC_OK;
System.out.println("fileName from client: " + fileName);
// if filename is not specified, complain.
if (fileName == null)
message = "Filename not specified";
status = HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
else
// open the file stream for the file about to be transferred.
File uploadedFile = new File(fileName);
// check if file already exists - and overwrite if necessary.
if (uploadedFile.exists())
if (overwrite)
// delete the file.
uploadedFile.delete();
// ensure the directory is writable - and a new file may be
created.
if (!uploadedFile.createNewFile())
message = "Unable to create file on server. FTP failed.";
status = HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
else
// get the necessary streams for file creation.
FileOutputStream fos = new FileOutputStream(uploadedFile);
InputStream is = req.getInputStream();
try
// create a buffer. 4K!
byte[] buffer = new byte[4096];
// read from input stream and write to file stream.
int byteCnt = 0;
while (true)
int bytes = is.read(buffer);
if (bytes < 0) break;
byteCnt += bytes;
// System.out.println(buffer);
fos.write(buffer, 0, bytes);
// flush the stream.
fos.flush();
} // end of try block.
finally
is.close();
fos.close();
// set last mod date for this file.
uploadedFile.setLastModified((new
Long(strLastMod)).longValue());
} // end of finally block.
} // end - the new file may be created on server.
} // end - we have a valid filename.
// set response headers.
resp.setContentType("text/plain");
resp.setStatus(status);
if (status != HttpServletResponse.SC_OK)
getServletContext().log("ERROR: " + message);
// get output stream.
PrintWriter out = resp.getWriter();
out.println(message);
} // end of doPost().
} // end of class FtpServerServletOK - the problem you describe is definitely what's giving you grief.
The workaround is to use a socket connection and send your own request headers, with the content length filled in. You may have to multi-part mime encode the stream on its way out as well (I'm not about that...).
You can use the following:
http://porsche.cis.udel.edu:8080/cis479/lectures/slides-04/slide-02.html
on your server to get a feel for the format that the request headers need to take.
- Kevin
I get the out of Memory Error on the client side. I
was told that this might be a bug in the URLConnection
class implementation that basically it wont know the
content length until all the data has been written to
the output stream, so it uses an in memory buffer to
store the data which basically causes memory issues..
do you think there might be a workaround of any kind..
or maybe a way that the buffer might be flushed after
a certain size of file has been uploaded.. ?? do you
have any ideas? -
How to append binary data to existing file in OSB
Hi,
I have an OSB project that I need for it to append binary data via ftp. Here's my current flow:
MFL binary output --> Replace $body with mfl binary output --> Publish to action (Business service that's configured to ftp binary data).
However, when the data is ftp'ed the following error is thrown:
URI = ftp://xxx:21/opt/home/zzz/logs
Request metadata =
<xml-fragment>
<tran:headers xsi:type="ftp:FtpRequestHeaders" xmlns:ftp="http://www.bea.com/wli/sb/transports/ftp" xmlns:tran="http://www.bea.com/wli/sb/transports" xmlns:xsi="h
ttp://www.w3.org/2001/XMLSchema-instance">
<ftp:fileName>11802_insert_oh_xfrmr.eai_data</ftp:fileName>
</tran:headers>
<tran:encoding xmlns:tran="http://www.bea.com/wli/sb/transports">utf-8</tran:encoding>
<ftp:isFilePath xmlns:ftp="http://www.bea.com/wli/sb/transports/ftp">false</ftp:isFilePath>
</xml-fragment>
Payload =
19266787^CLLL^C711791^CLLL^C^C1178213^CSingle Phase(1)^C63185066204^CA^CConstructed^C358880 NW 4 DR LK MONTAZA^C120/240^C09361^CN/A^CProposed Remove^CAerial^C45718100^C
Unknown^C^CNo^CNormal Closed^CClamp^CA^C1^C2-Cover^C19266796^CNo^CNo^C15^C^CYes^CYes^CYes^C13200Y/7620 X 22860Y/13200^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C
^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C19266641^Coh_fuse_switch^C63086930001^C4^CN31^CDD0613^C22.9^C63376474601^C8129580^CFalse^C4^COke
echobee^C43^C0^Cdefault^CYes^C
>
####<Nov 6, 2013 2:28:23 PM EST> <Error> <WliSbTransports> <goxsd1604> <osb_server1> <[ACTIVE] ExecuteThread: '3' for queue: 'weblogic.kernel.Default (self-tuning)'> <<
anonymous>> <BEA1-4B688443B66FA09FFE75> <d2b4601b2fffd9b7:6b9f2297:1422a857ee8:-8000-000000000000171b> <1383766103889> <BEA-381105> <Error occured for the service endpo
int: com.bea.wli.sb.transports.TransportException: Unable to open data connection. Message is Received error response (553) from FTP server [mpsd1] IP [10.111.19.32] po
rt [21] status [connected] upon executing command [stor opt/home/zzz/logs/11802_insert_oh_xfrmr.eai_data.a]
com.bea.wli.sb.transports.TransportException: Unable to open data connection. Message is Received error response (553) from FTP server [mpsd1] IP [10.111.19.32] port [2
1] status [connected] upon executing command [stor opt/home/icanadm/logs/11802_insert_oh_xfrmr.eai_data.a]
at com.bea.wli.sb.transports.ftp.connector.FTPTransportProvider.sendMessage(FTPTransportProvider.java:422)
From what I understand the error code 553 represents a bad file name. The file name that I'm supplying is 11802_insert_oh_xfrmr.eai_data but it appears that the name is changed to 11802_insert_oh_xfrmr.eai_data.a . So I did the obvious and changed the file several different ways (without the .eai_data extension, removed the numbers from the file name) but still no luck.
Any suggestions?
Thanks,
YusufThanks Eric.
I'm using the JCA FTP adapter instead and noticed it's appending the test generated data supplied by the OSB test console.
However, how can I ensure that the MFL output that I need to append will be placed on a new line?
Also, how should I map/assign the MFL binary output to the opaqueElement type base64Binary defined in the WSDL file below?
Once again here's a sample payload that I need to ensure will be presented on a new line:
19266787^CLLL^C711791^CLLL^C^C1178213^CSingle Phase(1)^C63185066204^CA^CConstructed^C358880 NW 4 DR LK MONTAZA^C120/240^C09361^CN/A^CProposed Remove^CAerial^C45718100^C
Unknown^C^CNo^CNormal Closed^CClamp^CA^C1^C2-Cover^C19266796^CNo^CNo^C15^C^CYes^CYes^CYes^C13200Y/7620 X 22860Y/13200^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C
^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C19266641^Coh_fuse_switch^C63086930001^C4^CN31^CDD0613^C22.9^C63376474601^C8129580^CFalse^C4^COke
echobee^C43^C0^Cdefault^CYes
Here's the WSDL file that gets generated for the FTP adapter:
<wsdl:definitions
name="PutGenericDevice"
targetNamespace="http://xmlns.oracle.com/pcbpel/adapter/ftp/AMS/Project1/PutGenericDevice"
xmlns:jca="http://xmlns.oracle.com/pcbpel/wsdl/jca/"
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
xmlns:tns="http://xmlns.oracle.com/pcbpel/adapter/ftp/AMS/Project1/PutGenericDevice"
xmlns:opaque="http://xmlns.oracle.com/pcbpel/adapter/opaque/"
xmlns:plt="http://schemas.xmlsoap.org/ws/2003/05/partner-link/"
>
<plt:partnerLinkType name="Put_plt" >
<plt:role name="Put_role" >
<plt:portType name="tns:Put_ptt" />
</plt:role>
</plt:partnerLinkType>
<wsdl:types>
<schema targetNamespace="http://xmlns.oracle.com/pcbpel/adapter/opaque/"
xmlns="http://www.w3.org/2001/XMLSchema" >
<element name="opaqueElement" type="base64Binary"/>
</schema>
</wsdl:types>
<wsdl:message name="Put_msg">
<wsdl:part name="opaque" element="opaque:opaqueElement"/>
</wsdl:message>
<wsdl:portType name="Put_ptt">
<wsdl:operation name="Put">
<wsdl:input message="tns:Put_msg"/>
</wsdl:operation>
</wsdl:portType>
</wsdl:definitions>
Here's the JCA details:
<adapter-config name="PutGenericDevice" adapter="FTP Adapter" wsdlLocation="PutGenericDevice.wsdl" xmlns="http://platform.integration.oracle/blocks/adapter/fw/metadata">
<connection-factory location="eis/ftp/DssPut"/>
<endpoint-interaction portType="Put_ptt" operation="Put">
<interaction-spec className="oracle.tip.adapter.ftp.outbound.FTPInteractionSpec">
<property name="PhysicalDirectory" value="/opt/eai/ofmw/Oracle/Middleware_R7/logs"/>
<property name="FileType" value="binary"/>
<property name="Append" value="true"/>
<property name="FileNamingConvention" value="dummy.txt"/>
</interaction-spec>
</endpoint-interaction>
</adapter-config>
Thanks,
Yusuf
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