adding sign-up support.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@6323 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Hudson.java

@@ -1847,6 +1847,13 @@ public final class Hudson extends View implements ItemGroup<TopLevelItem>, Node
         req.getView(this,"_script.jelly").forward(req,rsp);
     }
 
+    /**
+     * Sign up for the user account.
+     */
+    public void doSignup( StaplerRequest req, StaplerResponse rsp ) throws IOException, ServletException {
+        req.getView(getSecurityRealm(),"signup.jelly").forward(req,rsp);
+    }
+
     /**
      * Changes the icon size by changing the cookie
      */

core/src/main/java/hudson/security/SecurityRealm.java

@@ -3,10 +3,12 @@ package hudson.security;
 import hudson.ExtensionPoint;
 import hudson.model.Describable;
 import hudson.model.Descriptor;
+import hudson.model.Hudson;
 import hudson.util.DescriptorList;
 import org.acegisecurity.Authentication;
 import org.acegisecurity.AuthenticationManager;
 import org.springframework.context.ApplicationContext;
+import org.kohsuke.stapler.Stapler;
 
 import java.util.Map;
 
@@ -16,6 +18,11 @@ import java.util.Map;
  * <p>
  * New implementations should be registered to {@link #LIST}.
  *
+ * <p>
+ * If additional views/URLs need to be exposed,
+ * an active {@link SecurityRealm} is bound to <tt>CONTEXT_ROOT/securityRealm/</tt>
+ * through {@link Hudson#getSecurityRealm()}. 
+ *
  * @author Kohsuke Kawaguchi
  * @sicne 1.160
  */
@@ -35,12 +42,30 @@ public abstract class SecurityRealm implements Describable<SecurityRealm>, Exten
 
     /**
      * Returns the URL to submit a form for the authentication.
-     * Normally there's no need to override this.
+     * There's no need to override this, except for {@link LegacySecurityRealm}.
      */
     public String getLoginUrl() {
         return "j_acegi_security_check";
     }
 
+    /**
+     * Returns true if this {@link SecurityRealm} allows online sign-up.
+     * This creates a hyperlink that redirects users to <tt>CONTEXT_ROOT/signUp</tt>,
+     * which will be served by the <tt>signup.jelly</tt> view of this class.
+     *
+     * <p>
+     * If the implementation needs to redirect the user to a different URL
+     * for signing up, use the following jelly script as <tt>signup.jelly</tt>
+     *
+     * <pre><xmp>
+     * <st:redirect url="http://www.sun.com/" xmlns:st="jelly:stapler"/>
+     * </xmp></pre>
+     */
+    public final boolean allowsSignup() {
+        Class clz = getClass();
+        return clz.getClassLoader().getResource(clz.getName().replace('.','/')+"/signup.jelly")!=null;
+    }
+
     /**
      * Picks up the instance of the given type from the spring context.
      * If there are multiple beans of the same type or if there are none,

core/src/main/resources/hudson/model/Hudson/login.jelly

@@ -11,7 +11,7 @@
               <td><input type="text" name="j_username" id="j_username" /></td>
             </tr>
             <tr>
-              <td>Password</td>
+              <td>Password:</td>
               <td><input type="password" name="j_password" /></td>
             </tr>
           </table>
@@ -20,6 +20,12 @@
             $('j_username').focus();
           </script>
         </form>
+
+        <j:if test="${it.securityRealm.allowsSignup()}">
+          <div style="margin-top:2em">
+            <a href="signup">Create an account</a> if you are not a member yet.
+          </div>
+        </j:if>
       </div>
     </l:main-panel>
   </l:layout>