Thread: Need Java client to Upload files to Sharepoint 2010 using Kerberos authentication

Hi friends,

Need help on Java client to upload file to Sharepoint which is using KERBEROS authentication.

We have sharepoint server which is upgraded to 2010 version and is configured with Kerberos authentication. Earlier sharepoint version was using NTLM authentication for which I have javaq client program to upload files from local system. Since sharepoint got upgraded with Kerberos authentication, I need to modify current NTLM versioned java program to use Kerberos. I got code snippet for authentication and connectivity which is working fine. I am able to read Sharepoint URL and download a specific file though java program. Now I am trying upload file to Sharepoint but not getting the required java classes and jar files to be used for this.

I had Kerberos configuration setup using SPNEGO API to connect sharepoint.

Conf files:
krb5.conf
login.conf

API used to Kerberos Auth:
spnego-r7.jar


Connectivity:
Following code I am using for connectivity and File download which is perfectly working.

spnego = new SpnegoHttpURLConnection("spnego-client", <<sharepoint_user>>, <<sharepoint_password>>);

//New Lines added to omit SSL Handshake exception
TrustManager[] trustAllCerts = new TrustManager[]{
new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers(){
return null;
}
public void checkClientTrusted(java.security.cert.X509Certific ate[] certs, String authType){
//No need to implement.
}
public void checkServerTrusted(java.security.cert.X509Certific ate[] certs, String authType){
//No need to implement.
}
}
};
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.g etSocketFactory());
spnego.connect(new URL(spLocation));
System.out.println("spnego.getResponseCode():: "+spnego.getResponseCode());
if(spnego.getResponseCode() >= 200) {
log.debug("Authentication Successful");
}

File Read/Download:
java.io.BufferedInputStream in = new java.io.BufferedInputStream( spnego.getInputStream());
java.io.FileOutputStream fos = new java.io.FileOutputStream(outputFile);
java.io.BufferedOutputStream bout = new BufferedOutputStream(fos,1024);
byte[] data = new byte[1024];
int x=0;
System.out.println("4" + outputFile.length());
while((x=in.read(data,0,1024))>=0) {
bout.write(data,0,x);
}
bout.close();
in.close();



Kindly advise how to upload files to Sharepoint folder using java code. I searched many forums for hours but not getting exact code for File upload. Your advice on this much appreciated.

Thanks in advance.

@itsme_javaprogramming Please read The problems with cross-posting

Sorry for cross post. Henceforth I will ensure to post only in one forum.

Please advise your suggestion on this: Uploading file to Sharepoint through Java client using Kerberos Authentication.

Finally after 10 days of continuous research and search through many blogs, I got consolidated solution for my problem. I feel I should share it to all and I hope this helps:

UPLOAD MULTIPLE FILES TO SHAREPOINT (KERBEROS AUTHENTICATED):

System.setProperty("java.security.krb5.conf", workareaFolder+"/"+props.getProperty("kerberos.conf.file"));
System.setProperty( "java.security.auth.login.config", workareaFolder+"/"+props.getProperty("jass.conf.file"));
System.setProperty( "javax.security.auth.useSubjectCredsOnly", "false");

krb5MechOid = new Oid("1.2.840.113554.1.2.2");
spnegoMechOid = new Oid("1.3.6.1.5.5.2");

shost= targetSPN.toLowerCase();
if (shost.startsWith("http/") || shost.startsWith("cifs/") ) {
shost = shost.substring(5);
}
else {
log.debug("Entered invalid SPN. Must begin with HTTP/ or CIFS/");
System.exit(-1);
}
this.checkSPNHostname(shost);

//login to the KDC using JAAS login module
this.subject = login(username, password);

log.debug(this.subject);

SSLContext sslContext = SSLContext.getInstance("SSL");

// set up a TrustManager that trusts everything
sslContext.init(null, new TrustManager[] { new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(X509Certificate[] certs,
String authType) {
}
public void checkServerTrusted(X509Certificate[] certs,
String authType) {
}
} }, new SecureRandom());

Scheme httpScheme80 = new Scheme("http", 80, PlainSocketFactory.getSocketFactory());
SSLSocketFactory sf = new SSLSocketFactory(sslContext,SSLSocketFactory.ALLOW _ALL_HOSTNAME_VERIFIER);
Scheme httpsScheme = new Scheme("https", 443, sf);

SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(httpsScheme);
schemeRegistry.register(httpScheme80);

// Create Connection Manager instance for use by Httpclient
cm = new SingleClientConnManager(schemeRegistry);
HttpParams params = new BasicHttpParams();
params.setParameter(CoreProtocolPNames.PROTOCOL_VE RSION, HttpVersion.HTTP_1_1);

httpclient = new DefaultHttpClient(cm,params);
httpclient.setRedirectStrategy(new DefaultRedirectStrategy());

File[] listOfFiles = folder.listFiles(new FileFilter() {
public boolean accept(File f) {
if (f.isFile()) {
return true;
}
return false;
}
});
String[] url = new String[listOfFiles.length];
String spTargetFolder = new String();

totalFilesInReportsFolder = listOfFiles.length;

for (int i = 0; i < totalFilesInReportsFolder; i++) {
uploadFileName = listOfFiles[i].getName();
log.info("\nFile: "+uploadFileName);

spTargetFolder = this.getSPFolder(uploadFileName);
spDestinationFolderURL = sharedDocumentsRoot + instanceFolder + "/" + spTargetFolder + "/" + uploadFileName;
//log.info("Destination URL : " + spDestinationFolderURL);

httpPut = new HttpPut(new URI(sharedDocumentsRoot + instanceFolder + "/" + spTargetFolder + "/" + uploadFileName));
httpPut.getParams().setParameter("http.protocol.ha ndle-redirects",true);
InputStreamEntity inputStreamEntity = new InputStreamEntity(new FileInputStream(listOfFiles[i]), listOfFiles[i].length());
httpPut.setEntity(inputStreamEntity);
// Get the service ticket for targetSPN and set it in HttpPut Authorization header
this.serviceTicket= initiateSecurityContext( targetSPN );
encodedBytes = org.apache.commons.codec.binary.Base64.encodeBase6 4(this.serviceTicket);
encoded = new String(encodedBytes);
httpPut.addHeader("Authorization", "Negotiate " + encoded);

httpResponse = null;

try {
log.info("Uploading File... ");
log.debug("Executing httpPut request: " + httpPut.getRequestLine());
httpResponse = httpclient.execute(httpPut);
log.debug("After Post - Status code:" +httpResponse.getStatusLine().getStatusCode());
BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getCont ent(), "UTF-8"));
StringBuilder s = new StringBuilder();
String sResponse;
while ((sResponse = reader.readLine()) != null) {
s = s.append(sResponse);
}


if (httpResponse.getStatusLine() != null && httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
log.info("Response Code received: "+ httpResponse.getStatusLine() +" [200 - CREATE / OVERWRITE]");
log.info("File Sucessfully uploaded to Sharepoint location: "+spDestinationFolderURL );
uploadSuccessCount++;
} else {
log.error("Error while uploading file to sharepoint");
if (httpResponse.getStatusLine() != null && httpResponse.getStatusLine().getStatusCode() != HttpStatus.SC_CREATED){
log.error("Response code: "+httpResponse.getStatusLine().getStatusCode() );
log.error("Response Text:" + s);
}
uploadFailCount++;
}

log.debug("----------------------------------------");
log.debug("Response StatusLine: "+ httpResponse.getStatusLine());
log.debug("----------------------------------------");
log.debug("Return Code : " + httpResponse.getStatusLine().getStatusCode());
log.debug("----------------------------------------");

} catch (Exception exp) {
log.error("Exception while uploading report \""+uploadFileName+"\" to Share point="+exp);
exp.printStackTrace();
}
}