Iggy Iggy - 7 months ago 249
Java Question

BASIC authentication from JAVA to Sharepoint 2013 REST API

Java application needs access to SharePoint 2013 REST API
https://msdn.microsoft.com/en-us/library/office/jj860569.aspx

Would prefer to use BASIC authentication:

There are many examples of using the rest api's on the web but none seem to deal with authentication. Maybe I'm missing something really simple here.

This works manually via POSTMAN:
http://tech.bool.se/basic-rest-request-sharepoint-using-postman/
but requires me to enter username and password in browser.

I've tried implementing this:
HttpClientBuilder basic auth
using

<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.4.1</version>
</dependency>


This results in -> WARNING: NTLM authentication error: Credentials cannot be used for NTLM authentication: org.apache.http.auth.UsernamePasswordCredentials

Answer

Thanks @fateddy that does the trick: Remember to switch out UsernamePasswordCredentials("username", "password"));for NTCredentials(, , ,);

Using this maven dependency:

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.4.1</version>
</dependency>

The authentication to SharePoint works:

public class SharePointClientAuthentication {

public static void main(String[] args) throws Exception {
    CredentialsProvider credsProvider = new BasicCredentialsProvider();
    credsProvider.setCredentials(
            new AuthScope(AuthScope.ANY),
            new NTCredentials("username", "password", "https://hostname", "domain"));
    CloseableHttpClient httpclient = HttpClients.custom()
            .setDefaultCredentialsProvider(credsProvider)
            .build();
    try {
        HttpGet httpget = new HttpGet("http://hostname/_api/web/lists");

        System.out.println("Executing request " + httpget.getRequestLine());
        CloseableHttpResponse response = httpclient.execute(httpget);
        try {
            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());
            EntityUtils.consume(response.getEntity());
        } finally {
            response.close();
        }
    } finally {
        httpclient.close();
    }
}
}

Any you end up with : HTTP/1.1 200 OK

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