使用Java程序从Sharepoint下载文件

Question

I'm trying to download an excel workbook from a sharepoint site using java program. However I'm getting the error : Server redirected too many times (20) . I searched the forums and it appears to be an issue with cookies. After searching the forums, I added the first line of code to set default cookie handler, but the error still exists.

The java program is part of an osgi bundle. Strangely the program works when I run from my local PC running an instance of servicemix. But when I deploy this on the servicemix running on a remote server (linux machine), it gives this error.

I wanted to do this without having to use any third party libraries like apache-http etc.

Any suggestions what could be going wrong here?

    CookieHandler.setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ALL));


    Authenticator.setDefault(new Authenticator() {

        @Override
        protected PasswordAuthentication getPasswordAuthentication() {          
            return new PasswordAuthentication(USERNAME, 
                    PASSWORD.toCharArray());
        }
    });

    URL website = new URL(dataLocation);
    // data location points to the sharepoint file
    // its something like 
    // http://<company.sharepointsite.com>/project/sites/SampleProject/ProjectDocuments/Sample.xlsx


    ReadableByteChannel rbc = Channels.newChannel(website.openStream());
    FileOutputStream fos = new FileOutputStream(destinationFile);
    fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);

Answer 1

Finally, I ended up using Apache HTTP libraries which solved the problem. although this is an old post, I'm updating this as it might help others who are facing similar issue. http://mvnrepository.com/artifact/org.apache.httpcomponents