JavaRanch Sockets and Internet Protocols

Httpclient

Tue, 13 May 2008 14:45:12 MDT

hey all
iam using HttpClient and i want to send some xml text using GetMethod(string URL) to a servlet ,,and then can retrieve this text by the servlet using doGet method
anyone has a clue how to do this ??
thanks all

how to get particular data after parsing url content

Tue, 13 May 2008 09:13:11 MDT

hello I have the following code:

code:

 
String url = "http://www.bloomberg.com/apps/quote?ticker=JAVA:US;
URL source = new URL(url);
BufferedReader br = new BufferedReader(
 new InputStreamReader(source.openStream()));
while((str = br.readLine()) != null){ out.println(str + "<br />"); }
br.close();

Parsing content from Bloomberg getting html for Sun Micro. Now once I br.readLine() how do I get the particular data say price, volume etc from the variable str? Do I do some string search/comparison? I have no clue.

Never know Sun Micro changed its symbol

develop a web application server

Fri, 9 May 2008 23:13:00 MDT

Hi -

Are there any good resources on developing a web app server? I searched on the net but did not find anything useful.

Thanks

How to launch the tcp echo server on Mac OS X

Fri, 9 May 2008 12:58:59 MDT

Hello,

I'm trying to run the EchoClient from Sun tutorial:
Reading from and Writing to a Socket (http://java.sun.com/docs/books/tutorial/networking/sockets/readingWriting.html)

The problem I'm facing is that I have no idea how I should start the echo server on my computer (a Mac running 10.4.11).

Any help would be greatly appreciated.

IP address of my computer

Fri, 9 May 2008 08:26:58 MDT

I can find my computer's IP address with ipconfig in window, but this web site
(http://www.ip-adress.com/) shows me a completely different one. Which one
is right and why?

writing a bot for some internet site

Fri, 9 May 2008 07:00:58 MDT

hey,

I want to create some bot for a site. I dun know any idea how to do it. I am confident that i'll be able to parse the html of the website to retrive the desire data but i am confuse how to login to the site from my java program.

the site use hidden fields, ssl and other secruity things to log on and in return it sends the cookies.

1: how can i make my custom HTTP header to be sent to, for login
2: how wud i assure to maintain my session from my java program

byte[] for IP address storage????

Thu, 8 May 2008 21:22:57 MDT

In the InetAddress class there are several methods that retrieve IP addresses. The address is stored in a byte array, 4 bytes for a IP4 address.

How does that work?

I tried using getByAddress() where you pass both the string and the byte array. Problem is, a byte is a signed value so any attempt to stick a value > 127 in an address bytes draws a compiler error .... loss of precision. When I call getByName() on a known address string, the address that comes back in the byte array WILL print values over 127. Like.....241 shows up as 241.

Why would they have ever used a byte array to hold an 8 bit unsigned value? How is it that the API calls can store numbers > 127 into the byte array but I can'...

API for Connecting to SSL protected site which requires user authentication.

Tue, 6 May 2008 09:12:49 MDT

Hi all,

Serielization in Java

Mon, 5 May 2008 23:22:48 MDT

Hi... Anyone having good knowledge about object serialization in java, please let me know . Give a brief idea about it.

DatagramPacket to String

Mon, 28 Apr 2008 13:22:16 MDT

I create a UDP packet with a byte array of 1024 bytes. When I receive the message, I convert the byte array to a String using:

new String(b, 20, b.length - 20);

However, what I get is the expected String data padded on the right with nulls(?) out to the end of the 1024 bytes, instead of to the end of the byte array actually sent.

What is the correct/standard way to accomplish what I am trying to do?

WLST over SSL

Mon, 28 Apr 2008 07:00:15 MDT

[I have also posted this in the weblogic forum, not sure where it should go]

Hi there

I have successfully executed a WLST script over an SSL connection to perform operations such as deploy/undeploy EAR files and configure resources. I imported the demo certificate from my BEA install into my client JVM to achieve this.

I now want to specify the keystore on the command line so I can run a script without having to modify the JVM first.

So I tried -Djavax.net.ssl.keyStore=C:/jdk15/cacerts which didn't work.

I'm running WLST using ant so I also tried this which didn't work either

code:


 <java classname="weblogic.WLST" classpath="${weblogi...

How to call a Phone from Internet - Using Java

Mon, 28 Apr 2008 02:50:15 MDT

Hi...,

Earlier during circa 2000 AD, I used to down-load a software using which I can make calls ( Both long distance and Local) to plain-old-Telephones.

Due to government regulation, this free software is no-longer available, now-a-days some companies offer the same service for a price.

I am wondering if it is possible for me to make a call to a phone by writing a Java program.

Do I need to install any special software at my phone for converting packets to analog format.

Also I am wondering how the earlier software was able to make such calls without installing any hardware or software at the POT (end)

can i force connecting to local web server via internet network ?

Mon, 28 Apr 2008 02:28:14 MDT

Hello all
this is general question , if i have web server installed in my local pc and i have client that connecting to that web server
can i force it always to go via the internet network ?
the reason im asking is .. that im noticed when i close my internet connection i still can connect to my web server.

Netout error while doing FTP

Thu, 24 Apr 2008 09:20:03 MDT

Hi all,

I am working on a tool to transfer files remotely using FTP. I have used com.enterprisedt.net.ftp as the ftp library. Am having a problem with the put command. Problem is when I use the Put command from cmd line, it starts the transfer and the throws the error :

>Netout :Connection reset by peer
426 Connection closed; transfer aborted

Am trying to find the cause for this problem and hope to fix this because until am able to do file transfer manually(through command line), I won't be able to do it from my FTP application as we are following the same steps done in the manual transfer.

Any ideas why this error occurs?
Sorry If I have posted in the wrong forum.

Tha...

Who can give me some examples about snmp4j?

Thu, 24 Apr 2008 01:26:02 MDT

Recently i want to developed a network monitoring system by using snmp4j.

Sending SMS to Mobile from Java App

Wed, 23 Apr 2008 23:18:01 MDT

Hey guys,

In our project requirement, I need to send sms to the mobile from Java application.

I tried the following ways:
1. USMProLib, unfortunately from January 2008 theydon't support the USMProlib any version (Trial/licensed)
2. I am trying using SMSj application. but I stucked over here. I can't move.

Please guys any body help me in this...

Hey guys please excuse me if this post shouldn't posted over here.

SocketTimeoutException

Mon, 21 Apr 2008 05:16:16 MDT

Hi all,
when i'm trying to connect to a datbase and retrieve data through an externel server connection I'm getting a java.net.SocketTimeoutException.
When I direct browse the url it gives data.

im =urlc.getInputStream();
mbfr = new BufferedReader(new InputStreamReader(urlc.getInputStream()));

What ever i've written before the abouve code it prints. So i thought the exception is coming from the above code.

Also i'm not getting this exeception all the time. To retrieve data I pass two dates as parameters.
For a short period it works withhout errors.

Please Help me

Thank you

Can snmp4j capture packet from web?

Thu, 17 Apr 2008 19:16:19 MDT

Can snmp4j capture packet from web?

How to execute linux script remotely from java program on windows

Thu, 17 Apr 2008 12:06:18 MDT

Hi,
I want to execute a linux script from my java program residing on a windows machine. Can anybody help me in this regard? I can use the other tools like telnet to connect to linux machine and execute scripts but I would like to do it from the java program without going through the tools.
Appreciate your suggestions

JPEG Image Upload

Thu, 17 Apr 2008 11:02:18 MDT

Hello!

I am trying to send a HTTP-Upload Request to a PHP-Script on a Webserver.

Basically what I am doing atm is:
1) Read the jpeg image into a byte array
2) Create a HTTP-Request
3) Send the JPEG bytewise to the Server

Here is my Code of the uploading method:

code:

 private void uploadImage (byte[] byteImage) throws UnknownHostException,
 IOException {
 
 String start = getUploadStringStart();
 String end = getUploadStringEnd();
 long contentLength = start.length() + end.length() + byteImage.length;
 System.out.println (start.length());
 ...

java multicasting

Thu, 17 Apr 2008 05:14:17 MDT

hi everybody i am looking for hints on how to implement internet radio
using multicasting where the broadast is limited to the local network.
i am some ideas such as using JMF or MULTITHREADING but i am not
realy sure how to do it since i am very new to java. so please any one who knows something please tell me how to go an d what i need to need to know. i am quite good in c++ so if you can relate you discussion with c++ i would be very glad.I AM working in adeadline so please hury. THANKYOOU

HTTPS File download

Wed, 16 Apr 2008 08:33:01 MDT

Hi there.

I need to download files through my program from an https site.
I've done this through ftp. But can't see how it's done through https.
Can it be done? How?

Thanks in advance.

HTTPS File download

Wed, 16 Apr 2008 07:59:01 MDT

Hi there.

I need to download files through my program from an https site.
I've done this through ftp. But can't see how it's done through https.
Can it be done? How?

Thanks in advance.

accesing data from an IP address

Wed, 16 Apr 2008 07:15:02 MDT

Suppose I have developed a web application which is deployed on the webserver, now our LAN has 6 computers attached.IP Addresses of these computers is known to me. Now this application will keep on fetching the data after every 2 secs from all the PCs in this network, go to a particular folder in each of the computers and read the most recent file and upload its details to the database simultaneously.How to build this kind of application? Totally in a confused state of mind.Some code snippets or tutorials will be of great help.Please reply ASAP.

accesing data from an IP address

Wed, 16 Apr 2008 03:27:00 MDT

Unable to create a Socket object

Mon, 14 Apr 2008 05:51:17 MDT

Hi,

I was trying to create a socket object using the following code:

code:


import java.net.*;
 
class ChatServer {
 
public static void main(String[] args) {
 
try {
Socket sk = new Socket("127.0.0.1", 5000);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}

But when i run the compiled bytecode (class file) the machine throws an exception with the following stack trace:

java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connect...