Accessing data over HTTP

Question

I am attempting to get information from an asp page on a separate server with java.

Here is what I am currently running for code:

<%@ page contentType="text/html;charset=UTF-8"%>
<%@ page import="java.util.*" %>
<%@ page import="java.text.*" %>
<%@ page import="java.net.*" %>
<%@ page import="java.io.*" %>
<%@ page import="com.nse.common.text.*" %>
<%@ page import="com.nse.common.admin.*" %>
<%@ page import="com.nse.common.util.*" %>
<%@ page import="com.nse.common.config.*" %>
<%@ page import="com.nse.ms.*" %>
<%

        String targetUrl = "http://******/dash_auth/getmsuser.asp";
        InputStream r2 = new URL(targetUrl).openStream();

%>

<html>
<head>
    <title>get username</title>
</head>

<body>
Return Info = <%=r2%>
</body>
</html>

And this is what I am getting back

Return Info = sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@5fc9f555

I am hoping to get a username back and not this connection string. Any suggestions on how to get the actual output of my other page would be very helpful!

SJuan76 · Accepted Answer · 2013-10-15 18:51:13Z

2

When you do <%=r2%>, what you get is out.print(r2.toString()), which just gives a description of the instance.

Use the methods to read from an InputStream, to get the server result.

answered Oct 15, 2013 at 18:51

SJuan76

24.9k7 gold badges52 silver badges95 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Austin Lovell Over a year ago

Sounds easy enough. I am new to Java. How would I go about using the read() method?

SJuan76 Over a year ago

There are lots of examples about "read the contents from an inputstream"

coyote · Accepted Answer · 2013-10-15 18:51:04Z

1

You must read() from the InputStream.

answered Oct 15, 2013 at 18:51

coyote

1674 bronze badges

2 Comments

Austin Lovell Over a year ago

Sounds easy enough. I am new to Java. How would I go about using the read() method?

coyote Over a year ago

see docs.oracle.com/javase/7/docs/api/java/io/InputStream.html for details on how to use the IntputStream

nucatus · Accepted Answer · 2013-10-15 19:27:37Z

-1

You need to use an http client to create a connection and get the content back. Or make a system call to a OS utility like curl.

Here is a sample on how to use the http Client

http://hc.apache.org/httpclient-legacy/tutorial.html

If you want to do it in an unmanaged way, this is a working example:

public class URLStreamExample {

public static void main(String[] args) {
    try {
        URL url = new URL("http://www.google.com");
        InputStream is = url.openStream();
        byte[] buffer = new byte[2048];
        StringBuilder sb = new StringBuilder();
        while (is.read(buffer) != -1){
            sb.append(new String(buffer));
        }

        System.out.println(sb.toString());
    } catch (MalformedURLException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    } catch (IOException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    }
}

}

edited Oct 15, 2013 at 19:27

answered Oct 15, 2013 at 18:51

nucatus

2,2962 gold badges23 silver badges19 bronze badges

1 Comment

SJuan76 Over a year ago

Why can´t he use the (perfectly functional) Java API? And making a system call (creating a new process) for that is a good idea?

Collectives™ on Stack Overflow

Accessing data over HTTP

3 Answers 3

2 Comments

2 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

2 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related