Java

Using Java's own client

uses a static call, independent of the client itself

Authenticator auth = new Authenticator() {
   protected PasswordAuthentication getPasswordAuthentication() {
      return new PasswordAuthentication("USER","PASS".toCharArray());
   }
};
Authenticator.setDefault(auth);

Using Apache HttpClient

is applied to an instance of HttpClient

httpClient.getState().setCredentials( new UsernamePasswordCredentials(user, password) );

One benefit of using HttpClient is that it supports pre-emptive authentication which means that your credentials are automatically included in any request. When using the default Java Authenticator code, the JVM always makes an initial attempt to access remote resources without the credentials and then, after it fails, it'll provide them. This means that there's always one extra redundant HTTP request.

PHP

---

Using mod_curl

$request = curl_init("http://api.talis.com/stores/mystore/items");
curl_setopt($request, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
curl_setopt($request, CURLOPT_USERPWD, "username:password");
$response = curl_exec($request);

Python

You'll need something like this:

 import urllib2

    def postWithDigestAuth(self,data):
        authhandler = urllib2.HTTPDigestAuthHandler()
        authhandler.add_password(self.talis_realm, self.talis_uri, self.talis_user, self.talis_password)
        opener = urllib2.build_opener(authhandler)
        urllib2.install_opener(opener)
        
        headers = {"User-Agent":"danja-todo-thing", "Content-Type":"application/rdf+xml"}
        request = urllib2.Request(self.talis_uri, data, headers)
        try:
        	response = urllib2.urlopen(request)
        except urllib2.HTTPError, arg:
        	return arg

Shell

Using cURL

curl --digest -u"user:password" http://api.talis.com/stores/mystore/items

JavaScript

Using Jaxer (server side)

For example accessing OAI service which requires authentication.

var url = "http://api.talis.com/stores/{store}/services/oai-pmh?verb=ListRecords&metadataPrefix=oai_dc";
var options = new Jaxer.XHR.SendOptions();
options.username = "user";
options.password = "pass";
var content = Jaxer.Web.get(url, options);

Perl