Categories: Java ME | Networking | MIDP 2.0 | Known Issue

This page was last modified 08:10, 2 June 2008.

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Overview

Multiple HTTP headers of the same type cannot be handled on devices prior to S60 3rd Edition, Feature Pack 1.

Description

Multiple HTTP headers of the same type cannot be handled on the devices prior to S60 3rd Edition, Feature Pack 1. This issue is originally related to Java ME and has been defined in Sun's Bug Database.

The origin of the problem is that Java ME expects that HTTP headers in a given response are unique, while a Web server can return multiple headers of the same type in one response. In practice, this means that only the last one of the headers will be retrieved.

How to reproduce

The problem can be reproduced by trying to enumerate the headers of an HTTP connection. The enumeration can be done as follows:

HttpConnection conn = (HttpConnection) Connector.open(HTTP_URL);
..
String httpString;
int index=0;

while(conn.getHeaderFieldKey(index)!=null){

String headerName = conn.getHeaderFieldKey(index);
httpString += headerName + ": " + conn.getHeaderField(index) + "\n";
 

//TODO: implement a Form and insert the result HTTP string to the Form  

if(conn.equals("set-cookie"))
    {
   value = conn.getHeaderField(i);
    }

index++;
}

Solution

The problem has been fixed in the latest firmware versions of the S60 3rd Edition, Feature Pack 1 devices.