Buffered Input stream - data corruption
Hi
I'm using the following code to transfer data to a file
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(
new StringBuffer(path).append(part.getFileName()).toString()));
BufferedInputStream in = new BufferedInputStream(part.getInputStream());
while (in.available() > 0) {
out.write(in.read());
out.close();
in.close();It write the image and text files properly
But all the application based data like zip files,.doc files are getting corrupted
How do I solve it? What is the problem with the code?
Help pls
What a waste of buffers that code is.
We don't know how you might be corrupting the data
coming in because you haven't show us what that code
is like. All we see is part.getInputStream which is
hardly enough to make a diagnosis.OOps
private void writeAttachment(BodyPart part, String path) throws
MessagingException,
FileNotFoundException, IOException {
//Make new dir
new File(path).mkdirs();
if (this.EnsileCall)
this.log("Ensile writing <<" + part.getFileName() + ">> of size = " + part.getSize());
// Write to file
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(
new StringBuffer(path).append(part.getFileName()).toString()));
BufferedInputStream in = new BufferedInputStream(part.getInputStream());
while (in.available() > 0) {
out.write(in.read());
out.close();
in.close();
part.getInputStream() Part corresponds to a message body part in a mail(The attachment)
I'm getting the mail attachment's input stream and writing it to a file.
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Hi,
This may be a generic server issue rather than portal but since it's my portal app that's displaying the problem I'll post it here.
Part of my Portal attempts to POST to a remote server to retrieve some search results.
In environments A & B (both standalone instances) this works fine.
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Code sample:
package src.samples;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
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public static boolean test()
URL url = null;
try {
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* @param args
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System.out.println("Test result= " + test());In your recuperar() method, read the FTP input stream into a byte array. (You can do that by copying it to a ByteArrayOutputStream and then getting the byte array from that object.) Then, return a ByteArrayInputStream based on those bytes. After you call completePendingCommand(), of course.
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How the buffereing is done in buffered input/output streams?
From the API doc I got to know that they use internal buffer to store bytes before they can be read or written. But i found that File input/output stream also have methods like read(byte[]) or write(byte[]). So what is extra in buffered input/ouput streams? Does the phrase "buffered" suggests that bytes can be read from an array or be written to an array? Am i thinking the right way?How the buffereing is done in buffered input/output
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Does the phrase "buffered" suggests that bytes can be
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Hi all,
I am very newbie to Java Network programming with sockets and multi-threading.
But I am obliged to develop a chat system written in Applets which can be placed on the website and used by visitors who come to my website.
In order to understand this, I have tested a basic web chat program I downloaded from the Internet which use sockets and multi-threadings. The program work fine, no bugs at all at both compilation and run time. I noticed that all three streams for Client side (i.e. first one is input stream used receiving data from User; the second one is socket input stream used for receiving data from Server socket, and the third is socket output stream used for writing data to server socket) were established. And the same, two socket streams (input & output) for Server side were also connected when running program giving right port number and IP address of the server.
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1. DataStreamInput: I use input.readUTF() method
2. or BufferedReader: I use input.readLine() method
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private PrintWriter output = null;
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I very appreciate any help/advice from experienced developers.
Best regardsHi,
Yes. The readLine() method hangs! After the test, the execuation of the program is stopped at the line of readLine() method; it does not pass it?
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private PrintWriter output = null;
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start();
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thread.start();
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etc.
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while (true)
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Using buffered byte stream over a Socket (urgent)
I have been breaking my head over this since a day now.
This is my client:
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String st = msg+"\r\n";
byte buf[] = st.getBytes();
out.write(buf);
This is my server:
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OutputStream out = new BufferedOutputStream(s.getOutputStream());
int inp;boolean endOfStream=false
while(!endOfStream)
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endOfStream=true;
System.out.println(inp + " - " + (char) inp);
At the server, the program seems to be waiting perennially at the read() method of the input stream. To get to this point, the server socket has accepted the connection from the client socket successfully. Is there something that is wrong in the code snippet above? (Perhaps something stupid & basic that I missed out!)
Any clarifications, elucidations are welcome. Any alternate code-snippets that would do just what I'm trying to do would also help.
Thanks & Regards,
KapilYou should remeber to close the streams, too. If you don't flush or don't close the output stream there is no guarantee that any data will actually be sent - the BufferedOutputStream may well be buffering everything.
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import java.util.*;
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System.out.print("Enter file name: ");
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Scanner input = new Scanner(System.in);
Scanner read = new Scanner(new File(input.next()));
return read;
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21 double max;
double min;
23 int count = 0;
double total = 0;
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29 max = temp;
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31 count++
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44 System.out.println("Average of " + total/count);
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inputStream.close();
public static void main(String[] args)
textInput run = new textInput();
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hi,
In my applet I build a URLConnection, it connect a jsp file. In my jsp file I refer to a javaBean. I send two objects of request and response in jsp to javaBean. In javabean return output stream to URLConnect. At that time a error happened.WHY???(Applet-JSP-JAVABean)
Thanks.
My main code:
APPLET:(TestApplet)
URL url = new URL("http://210.0.8.120/jsp/test.jsp";
URLConnection con;
con = url .openConnection();
con = servlet.openConnection();
con.setDoInput( true );
con.setDoOutput( true );
con.setUseCaches( false );
con.setRequestProperty( "Content-Type","text/plain" );
con.setAllowUserInteraction(false);
ObjectOutputStream out;
out = new ObjectOutputStream(con.getOutputStream());
Serializable[] data ={"test"};
out.writeObject( data );
out.flush();
out.close();
//until here are all rigth
ObjectInputStream in = new ObjectInputStream( con.getInputStream() );//happened error
JSP:
TestBean testBean = new TestBean ();
testBean .execute(request, response);
JAVABEAN:
public void execute( HttpServletRequest request,
HttpServletResponse response )
ObjectInputStream in = new ObjectInputStream( request.getInputStream() );
String direct = (String) in.readObject();
System.out.prinltn("direct");
ObjectOutputStream out = new ObjectOutputStream( response.getOutputStream() );
SerializableSerializable[] data ={"answer"};
out.writeObject( data );
out.flush();
out.close();
Error detail:
java.io.StreamCorruptedException: invalid stream header
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:729)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:251)
at TestApplet.postObjects(TestApplet.java:172)you have to pay attention to the sequence of opening the streams.
The following example is: client sends a string to server, and servlet sends a response string back.
client side:
URL url = new URL( "http://152.8.113.149:8080/conn/servlet/test" );
URLConnection conn = url.openConnection();
System.out.println( "conn: " + conn );
conn.setDoOutput( true );
conn.setDoInput( true );
conn.setUseCaches( false );
conn.setDefaultUseCaches (false);
// send out a string
OutputStream out = conn.getOutputStream();
ObjectOutputStream oOut = new ObjectOutputStream( out );
oOut.writeObject( strSrc );
// receive a string
InputStream in = conn.getInputStream();
ObjectInputStream oIn = new ObjectInputStream( in );
String strDes = (String)oIn.readObject();server side
// open output stream
OutputStream out = res.getOutputStream();
ObjectOutputStream oOut = new ObjectOutputStream( out );
// open input stream and read from client
InputStream in = req.getInputStream();
ObjectInputStream oIn = new ObjectInputStream( in );
String s = (String)oIn.readObject();
System.out.println( s );
// write to client
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Hi,
We are getting the following error when running our SSIS packages on Microsoft SQL Server 2012 R2 on Windows Server 2008 R2 SP1:
Error: 4014, Severity:20, State: 11. A fatal error occurred while reading the input stream from the network. The session will be terminated (input error: 109, output error: 0)
SQL Server Data Tools and SQL Server Database Engine reside on the same server.
We tried the following:
Disabling TCP Chimney Offload
Installed Windows Server 2008 SP1
Splitting our SSIS code into multiple steps so it is not all one large continuous operation
The error occurs during a BulkDataLoad task.
Other options we are investigating with the engineering team (out-sourced, so delayed responses):
Firewall configurations (everything is local, so this should not make a difference)
Disabling the anti-virus scanner
Are there other things we can try?
Any insight is greatly appreciated.
Thanks!Hi HenryKwan,
Based on the current information, the issue can be caused by many reasons. Please refer to the following tips:
Install the latest hotfix based on your SQL Server version. Ps: there is no SQL Server 2012 R2 version.
Change the MaxConcurrentExecutables property from -1 to another one based on the MAXDOP. For example, 8.
Set "RetainSameConnection" Property to FALSE on the all the connection managers.
Reference:
https://connect.microsoft.com/SQLServer/feedback/details/774370/ssis-packages-abort-with-unexpected-termination-message
If the issue is still existed, as Jakub suggested, please provide us more information about this issue.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support -
SocketException during reads - JVM_recv in socket input stream read
I am getting a SocketException when a Java applet talks to our
WebLogic 7.0 server. The catch is that it only occurs at one site
(that has very high T1 utilization, although latency is only ~60 ms)
Our setup is such that the calls hit an Alteon load balancer, which
then sends the request out to one of 4 IIS clustered servers, where it
then is sent to one of 2 WL clustered servers. I figured latency
would be the cause, but on IIS and on WL, the timeouts are set to
several hundred seconds, so I am not quite seeing where the connection
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killing the connection, as nothing abnormal shows up in the WL log. I
have seen similar problems in this group, though, although the stack
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greatly appreciated.
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at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
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at org.xxxx.data.DataMediator.getDataNode(DataMediator.java:46)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Also, here is my code, although I can't see anything on the client
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public Object sendRequest( Object request, URL receiver ) throws
Exception{
Object response = null;
URLConnection con = null;
ObjectOutputStream out = null;
ObjectInputStream in = null;
try {
con = receiver.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setDefaultUseCaches(false);
con.setAllowUserInteraction(false);
out = new ObjectOutputStream(con.getOutputStream());
out.writeObject(request);
out.flush();
out.close();
in = new ObjectInputStream(con.getInputStream());
response = in.readObject();
in.close();
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if( out != null ){
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if( in != null ){
in.close();
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if( out != null ){
out.close();
if( in != null ){
in.close();
throw e;
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and XP. I don't remember all the details.
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com/coherence.jsp
Tangosol Coherence: Clustered Replicated Cache for Weblogic
"Keith Patrick" <[email protected]> wrote in message
news:[email protected]...
I'm getting the exception on the client, which is an XP machine, while
the server is Win2K. I can't recall which, but either the applet or
the server runs 1.3x while the other runs 1.4. I discounted that
factor, though, as the problem only occurs on one site, which on all
others it works fine.
"Cameron Purdy" <[email protected]> wrote in message
news:<[email protected]>...
Exception is in the applet or on the server?
Would one of those by any chance be running on W2K with JDK 131_01 orolder?
>>
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com/coherence.jsp
Tangosol Coherence: Clustered Replicated Cache for Weblogic
"Keith Patrick" <[email protected]> wrote in message
news:[email protected]...
I am getting a SocketException when a Java applet talks to our
WebLogic 7.0 server. The catch is that it only occurs at one site
(that has very high T1 utilization, although latency is only ~60 ms)
Our setup is such that the calls hit an Alteon load balancer, which
then sends the request out to one of 4 IIS clustered servers, where it
then is sent to one of 2 WL clustered servers. I figured latency
would be the cause, but on IIS and on WL, the timeouts are set to
several hundred seconds, so I am not quite seeing where the connection
is being reset. To be honest, I really don't know if it is WL that is
killing the connection, as nothing abnormal shows up in the WL log. I
have seen similar problems in this group, though, although the stack
traces never follow the same path mine does. I do have the following
call stack from the Java plug-in console, though. Any ideas would be
greatly appreciated.
java.net.SocketException: Connection reset by peer: JVM_recv in socket
input stream read
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at
sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(Unknown
Source)
atsun.plugin.net.protocol.http.HttpURLConnection.checkCookieHeader(Unknown
Source)
atsun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at org.xxxx.abstracts.Controller.sendRequest(Controller.java:39)
at org.xxxx.data.DataMediator.getDataNode(DataMediator.java:46)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Also, here is my code, although I can't see anything on the client
side that seems off:
public Object sendRequest( Object request, URL receiver ) throws
Exception{
Object response = null;
URLConnection con = null;
ObjectOutputStream out = null;
ObjectInputStream in = null;
try {
con = receiver.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setDefaultUseCaches(false);
con.setAllowUserInteraction(false);
out = new ObjectOutputStream(con.getOutputStream());
out.writeObject(request);
out.flush();
out.close();
in = new ObjectInputStream(con.getInputStream());
response = in.readObject();
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if( out != null ){
out.close();
if( in != null ){
in.close();
} catch (Exception e) {
if( out != null ){
out.close();
if( in != null ){
in.close();
throw e;
return response; -
How to get input stream of other application
Using Java is their any way to get the input stream of another applicaton?. For example i will start a java program and minimize it. Then i will start a notepad and type some thing in it. Java program should print all matters i am typed in notepad.
Is it possible using java?
Thanks in advanceYou have many ways to do that in C++. Read about Hooks and you will understand how u can do that. Anyway, even without hooks, u can get the messages from other applications in C++. So, let C++ get the data from other applications for you and let ur java program get data from the C++ program.
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Parse XML input stream (no .xml file)?
i have a java applet calling a web service that returns XML data as an input stream (char by char from SOAP) to this applet. if i append a all the chars to a string, is there some XML tool that will parse the string as if it were an XML document (like a getElement functions)?
the applet cannot write the data to a .xml file, and i don't want to mess around with .jarsigning. any ideas?
thanks,
jonathanThe XML parsers you are likely to be using support receiving input from a variety of sources besides files. For example you could parse XML from a String variable by passing a StringReader wrapping that String to the parser. Check the documentation for more details.
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How to read a file as an input stream after it's posted in an HTML form ?
Hello,
I want to read client file after it's posted in an HTML form. But, I don't want to upload it to filesystem or database. I want to read posted file as an input stream. How can I do that ?
thanks in advance...A couple of things. If you have a FILE field in your form, the enctype of the form must be multipart/form-data. Check this link
http://www.htmlhelp.com/reference/html40/forms/form.html
Also, when a file is uploaded you cannot use the regular methods to get at the name/value pairs or the file itself. You'll have to use a utility like MultiPartRequest or write your own based on the RFC for Multipart requests.
http://www.servlets.com/cos/javadoc/com/oreilly/servlet/MultipartRequest.html
You will need some temporary file system to store this and then delete it when you are done with it.
hth
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