Here is sample code in Java that shows how to access an AtomAPI enabled host to obtain a list of weblogs. This source code is dependance-free: no need to download any non-standard HTTP client library such as Apache's commons-httpclient.
As of today, it works perfectly on both Typepad (see their docs), and Blogger.
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.security.MessageDigest;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* Sample application that Lists the User's Weblogs from an Atom API enabled
* host. The code that deals with WSSE was inspired by the Sandler
* project.
*/
public class GetBlogs {
public static void main(String[] args) {
try {
if (args.length < 3) {
System.out
.println("Usage: java GetBlogs <url> <username> <password>");
System.out.println("<url> - the URL of the AtomAPI-enabled host");
System.out.println("<username> - the username on the host");
System.out.println("<password> - the username's password on the host");
System.out.println();
System.exit(1);
}
URL url = new URL(args[0]);
String username = args[1];
String password = args[2];
URLConnection connection = url.openConnection();
connection
.addRequestProperty("X-WSSE", getWSSEHeader(username, password));
InputStream in = null;
try {
in = connection.getInputStream();
} catch(Exception e){
e.printStackTrace();
in = ((HttpURLConnection)connection).getErrorStream();
}
BufferedReader res = new BufferedReader(new InputStreamReader(in, "UTF-8"));
String inputLine;
while ((inputLine = res.readLine()) != null)
System.out.println(inputLine);
res.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private static String getWSSEHeader(String username, String password)
throws Exception {
byte[] nonceB = generateNonce();
String nonce = base64Encode(nonceB);
String created = generateTimestamp();
String password64 = getBase64Digest(nonceB, created.getBytes("UTF-8"),
password.getBytes("UTF-8"));
StringBuffer header = new StringBuffer("UsernameToken Username=\"");
header.append(username);
header.append("\", ");
header.append("PasswordDigest=\"");
header.append(password64);
header.append("\", ");
header.append("Nonce=\"");
header.append(nonce);
header.append("\", ");
header.append("Created=\"");
header.append(created);
header.append("\"");
return header.toString();
}
private static byte[] generateNonce() {
String nonce = Long.toString(new Date().getTime());
return nonce.getBytes();
}
private static String generateTimestamp() {
SimpleDateFormat dateFormatter = new SimpleDateFormat(
"yyyy-MM-dd'T'HH:mm:ss'Z'");
return dateFormatter.format(new Date());
}
private static synchronized String getBase64Digest(byte[] nonce,
byte[] created, byte[] password) {
try {
MessageDigest messageDigester = MessageDigest.getInstance("SHA-1");
// SHA-1 ( nonce + created + password )
messageDigester.reset();
messageDigester.update(nonce);
messageDigester.update(created);
messageDigester.update(password);
return base64Encode(messageDigester.digest());
} catch (java.security.NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
private static synchronized String getBase64Digest(byte[] password) {
try {
MessageDigest messageDigester = MessageDigest.getInstance("SHA-1");
messageDigester.reset();
messageDigester.update(password);
return base64Encode(messageDigester.digest());
} catch (java.security.NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
private static String base64Encode(byte[] bytes) {
// Use Sun's encoder in this sample.
return new sun.misc.BASE64Encoder().encode(bytes);
}
}
