added @RequestHeader support

org.springframework.web/src/main/java/org/springframework/web/context/request/FacesWebRequest.java

@@ -51,6 +51,14 @@ public class FacesWebRequest extends FacesRequestAttributes implements NativeWeb
 	}
 
 
+	public String getHeader(String headerName) {
+		return getExternalContext().getRequestHeaderMap().get(headerName);
+	}
+
+	public String[] getHeaderValues(String headerName) {
+		return getExternalContext().getRequestHeaderValuesMap().get(headerName);
+	}
+
 	public String getParameter(String paramName) {
 		return getExternalContext().getRequestParameterMap().get(paramName);
 	}

org.springframework.web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java

@@ -23,6 +23,7 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.HttpSession;
 
+import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 
 /**
@@ -78,6 +79,16 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
 	}
 
 
+	public String getHeader(String headerName) {
+		return getRequest().getHeader(headerName);
+	}
+
+	@SuppressWarnings("unchecked")
+	public String[] getHeaderValues(String headerName) {
+		String[] headerValues = StringUtils.toStringArray(getRequest().getHeaders(headerName));
+		return (!ObjectUtils.isEmpty(headerValues) ? headerValues : null);
+	}
+
 	public String getParameter(String paramName) {
 		return getRequest().getParameter(paramName);
 	}

org.springframework.web/src/main/java/org/springframework/web/context/request/WebRequest.java

@@ -31,6 +31,21 @@ import java.util.Map;
  */
 public interface WebRequest extends RequestAttributes {
 
+	/**
+	 * Return the request header of the given name, or <code>null</code> if none.
+	 * <p>Retrieves the first header value in case of a multi-value header.
+	 * @see javax.servlet.http.HttpServletRequest#getHeader(String)
+	 */
+	String getHeader(String headerName);
+
+	/**
+	 * Return the request header values for the given header name,
+	 * or <code>null</code> if none.
+	 * <p>A single-value header will be exposed as an array with a single element.
+	 * @see javax.servlet.http.HttpServletRequest#getHeaders(String)
+	 */
+	String[] getHeaderValues(String headerName);
+
 	/**
 	 * Return the request parameter of the given name, or <code>null</code> if none.
 	 * <p>Retrieves the first parameter value in case of a multi-value parameter.