Solved

MIDP HTTP Connection Problems

Posted on 2006-11-01
4
860 Views
Last Modified: 2008-01-09
Hi,

I'm trying to build a MIDP application which will connect to Servlets running on an Apache Server.  I have built the architecture successfully such that I can connect to a servlet, receive a response and display it in the Midlet.  However, when I try to connect to a second servlet I get a java.io.IOException: response empty.

I have tested the servlet separately and it works fine.  I am also ensuring that the previous HTTP Connection and Input Stream are closed.  My code is as follows:

public void displayBooks() throws IOException {
    HttpConnection hc = null;
    InputStream in = null;
    try {
        ...
        String authorSearchUrl = midlet.getAppProperty("AuthorSearch");
        authorSearchUrl = authorSearchUrl + "?Author=" + workAuthor + "&ItemPage=" + 1;
                   
        hc = (HttpConnection)Connector.open(authorSearchUrl);
        hc.setRequestMethod(HttpConnection.GET);
        hc.setRequestProperty("Connection", "close");
        in = hc.openInputStream();
                  
        String result = null;
        int contentLength = (int)hc.getLength();
        ...
    }
    catch(NullPointerException npe){
        append(npe.toString());
    }
    catch(Exception e) {
        append(e.toString());
    }      
    finally {
        if (in != null) {
            in.close();
        }
        if (hc != null) {
            hc.close();
        }
    }

Any ideas would be most appreciated!
0
Comment
Question by:Systima
  • 2
  • 2
4 Comments
 
LVL 92

Expert Comment

by:objects
ID: 17853081
is the url the same the 2nd time?
0
 

Author Comment

by:Systima
ID: 17853189
No - it's a different url to connect to a different servlet.
0
 
LVL 92

Accepted Solution

by:
objects earned 250 total points
ID: 17853254
does the same url work if u try it the 2nd time?
may be a problem with the url

if there are space in workAuthor you'll need to encode them
0
 

Author Comment

by:Systima
ID: 17873681
Thanks - there was a problem with the 2nd url.  I needed to trim it.  All sorted - cheers!!!
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For customizing the look of your lightweight component and making it look lucid like it was made of glass. Or: how to make your component more Apple-ish ;) This tip assumes your component to be of rectangular shape and completely opaque. (COD…
An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question