Send to files to client

Hi,
I need to send two separate files using a single HttpResponse. II don't know how to do that, and I'm trying to make a zip file that contains thw two files. The problem is that the two files doesn't exisist on the server, and I don't know how t o put a String Stream into a ZipStream . Some one could help me?
Thanks in advance
Nicola Salvo

I've solved using:
private void extract(OutputStream out){
    PrinterWriter pw = new PrinterWriter(out)
    try{
    finally pw.flush
ZipOutputStream out = new ZipOutputStream(response.getOutputStream());
out.putNextEntry(new ZipEntry("feat.csv");
extract(out)
out.colseEntry();
out.close()Thank for your answer :)

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Sending xml file from client to servlet

Hi,
I am writing the server component of an applcation, such that it will receive xml files from the clients(standalone application similar to javaSwing stuff but it's coded in C#), and the servlet will have to extract the data from the xml file and update the mySql database. it will also fulfill the client's request for xmlFiles (and extract data from DB, format to xml file and send back to client)
I'm new to implementing the servlet receiving files from clients so would need some help.
I've got 3 questions to ask:
1) How does the servlet receive/returns the xml file from the client as a series of httpPost request/response. Do i send a File or the file's contents as a String to/from the client?
2) Is it also a must to use socket for the file transfers? I have read in other posts about sockets as well as HttpURLConnection but i don't quite understand.
3) When I send a file back to the client(client is standalone application written in C# whereas server is coded in java), what do i specify for the HttpResponse.setContentType() in my servlet? (i'm returning the xml file to client)
Would really appreciate for any help rendered. If you have any useful links, would appreciate them too. Thanks a lot.
Karen

I've got 3 questions to ask:
1) How does the servlet receive/returns the xml file
from the client as a series of httpPost
request/response. Do i send a File or the file's
contents as a String to/from the client?The server will listen on some port for requests. The client has to open a socket to this server to send the file as string to the server.
see http://java.sun.com/docs/books/tutorial/networking/index.html
>
2) Is it also a must to use socket for the file
transfers? I have read in other posts about sockets as
well as HttpURLConnection but i don't quite
understand.You use HttpURLConnection to make a request using the http protocol, instead of opening a socket and then writing the html headers yourself.
3) When I send a file back to the client(client is
standalone application written in C# whereas server is
coded in java), what do i specify for the
HttpResponse.setContentType() in my servlet? (i'm
returning the xml file to client)Its up to your receiving program how to interpret this though, so you probably dont need this.

With webutil-client_host, send txt file to client printer

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just try some statement looks like below;
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Hi,
on a command line type
print /?
for the help of how to print documents. On XP this help is
PRINT [D:device] [[drive:][path]filename[...]]
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Toast 8 is the answer. Clients want to get something they can play EASY. DVD works on the TV and PC and needs nothing software wise. Worth the money. Plus the video quality looks good enough but really is not good enough to steal and edit.

Send a file to client

Hi!
I have to send a byte array as a file to the browser. How do I convert byte[] into a resource-type context node, so it can be downloaded?
Thanks!

Hi,
this code does it the other way, but I may be helpfull:
private byte[] getByteArrayFromResource(IWDResource resource)
throws FileNotFoundException, IOException {
InputStream in = resource.read(false);
ByteArrayOutputStream out = new ByteArrayOutputStream();
int length;
byte[] part = new byte[10 * 1024];
while ((length = in.read(part)) != -1) {
out.write(part, 0, length);
in.close();
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Regards, Bernd

Pls help: server send a file upon client's request

I just started learning Java and I'm trying to write a simple file transfer program. My problem should be in the transfer part. Code as follows:
Client side:
package p2pclient;
import java.io.*;
import java.net.*;
public class P2PClient {
public static void main(String argv[]) throws Exception
String filename;
try {
Socket clientSocket = new Socket("localhost", 6783);
BufferedReader inFromUser = new BufferedReader( new InputStreamReader(System.in));
filename = inFromUser.readLine();
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
outToServer.writeBytes(filename);
String newname = "C:\\" + filename;
File file = new File(newname);
byte[] Byte = new byte[1120];
DataInputStream inFromSocket = new DataInputStream(clientSocket.getInputStream());
FileOutputStream fout = new FileOutputStream(file);
int reads;
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fout.write(Byte, 0, Byte.length);
clientSocket.close();
catch (java.io.IOException e) {
      System.err.println("error connecting to " + "Daniel-Ding" + ":" + e);
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}On the server side:
package p2pserver;
import java.io.*;
import java.net.*;
import java.util.logging.*;
class FileTransfer implements Runnable {
private Socket connectionSocket;
FileTransfer(Socket connectionSocket) {
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public void run(){
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class P2PServer {
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}I can see an empty file with the name of 'newname' in my C drive but no data transfered.
Thanks a lot in advance.

Hi Peter,
Sorry to bother you again. I tried to increase the size of the buffer. The speed improved but the transfered file quality became intolerable. I tested it with some mp3 files and found that with large buffer size there was a lot of noise in the transfered mp3s. Any idea what I can do to optimize this trade-off?
Many thanks.
Best,
Daniel

Help :- Send Large File From Server To Client

Hey guys, I am stuck with a problem.Hope u guys might be able to help me out. My problem is :-
From client i am doing an operation which results in calculation of results by server and saving a file on the server..But i want to see what results have been computed by the server and hence i want to stream that file back to the client..
The file may be of 100MB as well , that is, the size of the file may be huge.
I want u guys to tell me how to stream that file back to the client..I tried returning byte array which gets serialized and then received at client side but as i said the file may be huge so memory problem may arise, so returning byte[] from function is not a good solution..
I am looking something where server can send the file back to the client in chunks..Client keeps receiving these chucks and keep putting them in the file.
So how to make server send file in chunks??Also, i don't know the hostname and ports...so sockets i can't use...
Any Another way to do it...??
is PipedStream a solution??
Please guys, help me
Thanks in advance
Edited by: 854509 on Apr 25, 2011 8:28 AM
Edited by: 854509 on Apr 25, 2011 8:59 AM

854509 wrote:
I knew about sockets but as i said i am able to send request to server by client by calling a remote method...There i haven't used sockets...RMI uses sockets, I assume you mean you don't access to the underlying socket.
So i wanted to know if we can without using sockets send file back to Client..I would have the RMI return the connection details where the result can be obtains, .e.g with hostname, port, and file name to use.
I would suggest trying to compress the stream as well (just wrapp the stream on the sender/reciever), especially for files over 1 MB.
Tell me something abt PipedStreams as well..If they are of any use here or not?I don't see how. PipedStreams can be used to share data between threads in the same process.
If RMI is your only choice you can perform a method which would return alot of data and have seperate methods to download portions of it.
e.g.
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public byte[] returnPortion(int n);
int portions = rmi.loadBigFile("my-big-file.xml");
for(int i=0;i<portions;i++) {
byte[] bytes = rmi.returnPortion(i);
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Help! I have recently updated LR5 and before doing so I was able to email files to clients! (Very Convenient) Now my problem is I have not been able to get pass this error message reading "failed to send" which gives no further detail about what to do to

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Off the top, and I don't know how familiar you are with bash shell or other scripting languages here...
Cleanup is one or two lines of bash in a +periodic daily+ script. Delete stuff older than a week or such via a bash shell find command and an rm, mayhap. That stuff is easy, if it's just a "blindly nuke stuff older than a week" or similar logic required. (Test that rm logic carefully as it really stinks to accidentally rm too much.)
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If this stuff doesn't exist, it's a day or two to code it in bash. And perl or php or python or ruby or such could likely be used here, too.
In general: be careful with who and what can be uploaded to your server, too. Allowing a random file upload into the server environment is very close to allowing a server breach. Some of the attacks here are clever, too. (qv: "gifar" files).

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968776 wrote:
How can I create an csv/excel file using pl/sql and then sending that file to a clients site using pl/sql?
I know how to create the csv/excel file but I can't figure out how I would get it to the clients site.You are trying to do it at a wrong place..
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{message:id=9360007}
{message:id=9984244}

Sending multiple files using one socket

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I'm working on a simple app that sends multiple files over LAN or I-NET. The problem is that the app run seems to be non-deterministic. I keep getting this error on the client side:
java.io.UTFDataFormatException: malformed input around byte 5
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Client
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Send the length of each file ahead of each file, with DataOutputStream.writeLong().
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[http://commons.apache.org/fileupload]
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