first commit

README

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+Sample code to authenticate via ajax using Spring Security

org/camechis/AjaxAuthenticationFailureHandler.java

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+package org.camechis.security;
+
+import java.io.IOException;
+import java.io.Writer;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpServletResponseWrapper;
+
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.web.authentication.AuthenticationFailureHandler;
+
+public class AjaxAuthenticationFailureHandler implements AuthenticationFailureHandler {
+
+	@Override
+	public void onAuthenticationFailure(HttpServletRequest request,
+			HttpServletResponse response, AuthenticationException exception)
+			throws IOException, ServletException {
+        HttpServletResponseWrapper responseWrapper = new HttpServletResponseWrapper(response);
+        Writer out = responseWrapper.getWriter();
+        out.write("{ success: false, errors:{reason: 'Login failed. Try again.'}} ");
+        out.close(); 
+	}
+
+}

org/camechis/AjaxSuccessAuthenticationHandler.java

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+package org.camechis;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpServletResponseWrapper;
+
+import org.codehaus.jackson.map.ObjectMapper;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
+
+public class AjaxSuccessAuthenticationHandler implements
+		AuthenticationSuccessHandler {
+
+	@Override
+	public void onAuthenticationSuccess(HttpServletRequest request,
+			HttpServletResponse response, Authentication authentication)
+			throws IOException, ServletException {
+		HttpServletResponseWrapper responseWrapper = new HttpServletResponseWrapper(
+				response);
+
+		Writer out = responseWrapper.getWriter();
+		Map<String, Object> authResponse = new HashMap<String, Object>();
+		authResponse.put("success", true);
+		authResponse.put("user", SecurityContextHolder.getContext()
+				.getAuthentication().getName());
+		List<String> authorities = new ArrayList<String>();
+		for (GrantedAuthority auth : SecurityContextHolder.getContext()
+				.getAuthentication().getAuthorities()) {
+			authorities.add(auth.getAuthority());
+		}
+		authResponse.put("authorities", authorities);
+		ObjectMapper mapper = new ObjectMapper();
+		mapper.writeValue(out, authResponse);
+		out.close();
+
+	}
+
+}