How much bytes are my data - TCP-String
Hi,
I have a 40960 elements long 1D array of SGL data type. I flatten it and I send it through TCP. The receiver gets it but certainly slower than it is sent. It makes me think that I read in much more bytes than needed. For the TCP read I use the CRLF option.
After flattening the 40960 long SGL 1D array should become a 40960 long string that would be 40960 bytes. Now, the TCP includes its data as well but I don't know how much, i.e. I don't know how much data [in bytes] I really send and so don't know how much to receive.
Thanks for the advices.
Set up a header packet of a constant size, as shown below, which includes the length of the array you are sending. You get this length by typecasting the data to a string, then using the string length function to determine the array size in bytes. Using this method makes your code expandable, rather than using a constant for the number of bytes read on the host side.
Send
Receive
CLA, LabVIEW Versions 2010-2013
Attachments:
send.PNG 9 KB
receive.PNG 8 KB
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Having issues finding out how many bytes are sent/recieved from a socket.
Hello everyone.
I've searched the forums and also google and it seems I can't find a way to figure out how many bytes are sent from a socket and then how many bytes are read in from a socket.
My server program accepts a string (an event) and I parse that string up, gathering the relevant information and I need to send it to another server for more processing.
Inside my server program after receiving the data ( a string) I then open another port and send it off to the other server. But I would like to know how many bytes I send from my server to the other server via the client socket.
So at the end of the connection I can compare the lengths to make sure, I sent as many bytes as the server on the other end received.
Here's my run() function in my server program (my server is multi threaded, so on each new client connection it spawns a new thread and does the following):
NOTE: this line is where it sends the string to the other server:
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public class MultiThreadServer implements Runnable {
Socket csocket;
MultiThreadServer(Socket csocket) {
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String input;
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System.out.println("Lenght of the string was: " + input.length());
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in.close();
csocket.close();
} catch (IOException e) {
System.out.println(e);
e.printStackTrace();
}Here's an example of the program works right now:
Someone sends me a string such as this:
Enter port to run server on:
5656
Listening on : ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=5656]
Waiting for client connection...
Socket[addr=/127.0.0.1,port=4919,localport=5656] connected.
hostname: localhost
Ip address: 127.0.0.1:5656
Waiting for data...
Event from: localhost-> UPDATE: "@busch2.raleigh.ibm.com->NmosPingFail1",424,"9.27.132.139","","Omnibus","Precision Monitor Probe","Precision Monitor","@busch2.raleigh.ibm.com->NmosPingFail",5,"Ping fail for 9.27.132.139: ICMP reply timed out",07/05/07 12:29:12,07/03/07 18:02:31,07/05/07 12:29:09,07/05/07 12:29:09,0,1,194,8000,0,"",65534,0,0,0,"NmosPingFail",0,0,0,"","",0,0,"",0,"0",120,1,"9.27.132.139","","","","dyn9027132107.raleigh.ibm.com","","","",0,0,"","","NCOMS",424,""
Now my program makes it all nice and filters out the junk and resends the new string to the other server running here:
Enter port to run server on:
1234
Listening on : ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=1234]
Waiting for client connection...
Socket[addr=/127.0.0.1,port=4920,localport=1234] connected.
Parser client connected.
hostname: localhost
Ip address: 127.0.0.1:1234
Event from: localhost-> PacketType: UPDATE , SizeOfPacket: 577 , PacketID: 1, Identifer: UPDATE: "@busch2.raleigh.ibm.com->NmosPingFail1" , Serial: 424 , Node: "9.27.132.139" , NodeAlias: "" , Manager: "Omnibus" , Agent: "Precision Monitor Probe" , AlertGroup: "Precision Monitor" , AlertKey: "@busch2.raleigh.ibm.com->NmosPingFail" , Severity: 5 , Summary: "Ping fail for 9.27.132.139: ICMP reply timed out",StateChange: 07/05/07 12:29:12 , FirstOccurance: 07/03/07 18:02:31 , LastOccurance: 07/05/07 12:29:09 , InternalLast: 07/05/07 12:29:09 , EventId: "NmosPingFail" , LocalNodeAlias: "9.27.132.139"
Lenght of the string was: 579
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I tested it for several cases and in all cases its adding 2 extra bytes.
Anyways, I think this is a bad solution to my problem but is the only one I could think of.
Any help would be great!(a) You are counting characters, not bytes, and you aren't counting the line terminators that are appended by println() and removed by readLine().
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import java.net.URLConnection;
import java.net.URL;
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import java.util.Date;
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import java.util.Random;
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* @author Vlad Patryshev
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if (parameters == null) return;
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* @return input stream with the server response
* @throws IOException
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writeln("--");
os.close();
return connection.getInputStream();
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* @return input stream with the server response
* @throws IOException
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* @param cookies request cookies
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* @param name4 fourth parameter name
* @param value4 fourth parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
public InputStream post(String name1, Object value1, String name2, Object value2, String name3, Object value3, String name4, Object value4) throws IOException {
setParameter(name1, value1);
return post(name2, value2, name3, value3, name4, value4);
* posts a new request to specified URL, with parameters that are passed in the argument
* @param parameters request parameters
* @return input stream with the server response
* @throws IOException
* @see setParameters
public InputStream post(URL url, Map parameters) throws IOException {
return new ClientHttpRequest(url).post(parameters);
* posts a new request to specified URL, with parameters that are passed in the argument
* @param parameters request parameters
* @return input stream with the server response
* @throws IOException
* @see setParameters
public InputStream post(URL url, Object[] parameters) throws IOException {
return new ClientHttpRequest(url).post(parameters);
* posts a new request to specified URL, with cookies and parameters that are passed in the argument
* @param cookies request cookies
* @param parameters request parameters
* @return input stream with the server response
* @throws IOException
* @see setCookies
* @see setParameters
public InputStream post(URL url, Map cookies, Map parameters) throws IOException {
return new ClientHttpRequest(url).post(cookies, parameters);
* posts a new request to specified URL, with cookies and parameters that are passed in the argument
* @param cookies request cookies
* @param parameters request parameters
* @return input stream with the server response
* @throws IOException
* @see setCookies
* @see setParameters
public InputStream post(URL url, String[] cookies, Object[] parameters) throws IOException {
return new ClientHttpRequest(url).post(cookies, parameters);
* post the POST request specified URL, with the specified parameter
* @param name parameter name
* @param value parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
public InputStream post(URL url, String name1, Object value1) throws IOException {
return new ClientHttpRequest(url).post(name1, value1);
* post the POST request to specified URL, with the specified parameters
* @param name1 first parameter name
* @param value1 first parameter value
* @param name2 second parameter name
* @param value2 second parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
public InputStream post(URL url, String name1, Object value1, String name2, Object value2) throws IOException {
return new ClientHttpRequest(url).post(name1, value1, name2, value2);
* post the POST request to specified URL, with the specified parameters
* @param name1 first parameter name
* @param value1 first parameter value
* @param name2 second parameter name
* @param value2 second parameter value
* @param name3 third parameter name
* @param value3 third parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
public InputStream post(URL url, String name1, Object value1, String name2, Object value2, String name3, Object value3) throws IOException {
return new ClientHttpRequest(url).post(name1, value1, name2, value2, name3, value3);
* post the POST request to specified URL, with the specified parameters
* @param name1 first parameter name
* @param value1 first parameter value
* @param name2 second parameter name
* @param value2 second parameter value
* @param name3 third parameter name
* @param value3 third parameter value
* @param name4 fourth parameter name
* @param value4 fourth parameter value
* @return input stream with the server response
* @throws IOException
* @see setParameter
public InputStream post(URL url, String name1, Object value1, String name2, Object value2, String name3, Object value3, String name4, Object value4) throws IOException {
return new ClientHttpRequest(url).post(name1, value1, name2, value2, name3, value3, name4, value4);
With best regards!
MfG
Inno
Message was edited by:
Innocentus -
How to get the system date format string?
Hello, everybody!
I want to create a MaskFormatter with a mask for dates. So, I could suply as the constructor parameter: "##/##/####'. However, what if the year comes first in the current system date format settings, or the month is in the second place or in the first?... So, I can't just suppose that the current locale format for dates is like the one above. So, my question is: is there a way to get the SYSTEM DATE FORMAT STRING in Java? Searching in google I saw that this was already asked in this forum:
http://forum.java.sun.com/thread.jspa?threadID=301034&messageID=1193794
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hthThank you very much. It worked. -
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