Return the MIME Header
In this section you will learn about the method to
retrieve the MIME header. MIME is stands for Multipurpose Internet Mail
Extensions which is an Internet Standard that extends the format of e-mail to
support. A container for MimeHeader objects, which represent the MIME headers
that is present in a MIME part of data. Here we provide an example in which we
create a class named getMIMEHeader and create an object of URL and pass the
user. After that we call a method openConnection() which pass a
URLConnection object which represents a connection to the remote object of the
URL. After establish a connection we use getContentType() which display
the value of the content-type header field e.g. the resource that the URL
references, or null if not known. After that we use getContentEncoding()
that returns the value of the content-encoding header field, it also refer
content encoding of the resource that the URL references, or null
if not known. After that we use the getDate() which display expiration
date of the resource that this URL references, or 0 if not known. Then we use getLastModified(),
it will display the value of the last-modified header field. The getExpiration()
method returns the value of the expires header field all the result are the
number of milliseconds since January 1, 1970 GMT. The last method getContentLength()
used in the program returns the value of the content-length of the header
field.
Here is the Output of the Example :
import java.net.*;
import java.io.IOException;
public class getMIMEHeader {
public static void main(String args[]) {
for (int i=0; i < args.length; i++) {
try {
URL u = new URL(args[0]);
URLConnection uc = u.openConnection();
System.out.println("Content-type: " + uc.getContentType());
System.out.println("Content-encoding: " + uc.getContentEncoding());
System.out.println("Date: " + new java.util.Date(uc.getDate()));
System.out.println("Last modified: " + new java.util.Date(uc.getLastModified()));
System.out.println("Expiration date: " + new java.util.Date(uc.getExpiration()));
System.out.println("Content-length: " + uc.getContentLength());
} // end try
catch (MalformedURLException e) {
System.err.println(args[i] + " is not a URL I understand");
}
catch (IOException e) {
System.err.println(e);
}
System.out.println();
} // end for
} // end main
} // end getMIMEHeader
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Here is the Output of the Example :
C:\roseindia>javac getMIMEHeader.java
C:\roseindia>java getMIMEHeader http://roseindia.net
Content-type: null
Content-encoding: null
Date: Thu Jan 01 05:30:00 GMT+05:30 1970
Last modified: Thu Jan 01 05:30:00 GMT+05:30 1970
Expiration date: Thu Jan 01 05:30:00 GMT+05:30 1970
Content-length: -1 |
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example.
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