JSP/Java擷取HTTP header資訊(request)例子

<%
//header.jsp
out.println("Protocol: " + request.getProtocol() + "<br>");
out.println("Scheme: " + request.getScheme() + "<br>");
out.println("Server Name: " + request.getServerName() + "<br>" );
out.println("Server Port: " + request.getServerPort() + "<br>");
out.println("Protocol: " + request.getProtocol() + "<br>");
out.println("Server Info: " + getServletConfig().getServletContext().getServerInfo() + "<br>");
out.println("Remote Addr: " + request.getRemoteAddr() + "<br>");
out.println("Remote Host: " + request.getRemoteHost() + "<br>");
out.println("Character Encoding: " + request.getCharacterEncoding() + "<br>");
out.println("Content Length: " + request.getContentLength() + "<br>");
out.println("Content Type: "+ request.getContentType() + "<br>");
out.println("Auth Type: " + request.getAuthType() + "<br>");
out.println("HTTP Method: " + request.getMethod() + "<br>");
out.println("Path Info: " + request.getPathInfo() + "<br>");
out.println("Path Trans: " + request.getPathTranslated() + "<br>");
out.println("Query String: " + request.getQueryString() + "<br>");
out.println("Remote User: " + request.getRemoteUser() + "<br>");
out.println("Session Id: " + request.getRequestedSessionId() + "<br>");
out.println("Request URL: " + request.getRequestURL() + "<br>");
out.println("Request URI: " + request.getRequestURI() + "<br>");
out.println("Servlet Path: " + request.getServletPath() + "<br>");
out.println("Created : " + session.getCreationTime() + "<br>");
out.println("LastAccessed : " + session.getLastAccessedTime() + "<br>");

out.println("Accept: " + request.getHeader("Accept") + "<br>");
out.println("Host: " + request.getHeader("Host") + "<br>");
out.println("Referer : " + request.getHeader("Referer") + "<br>");
out.println("Accept-Language : " + request.getHeader("Accept-Language") + "<br>");
out.println("Accept-Encoding : " + request.getHeader("Accept-Encoding") + "<br>");
out.println("User-Agent : " + request.getHeader("User-Agent") + "<br>");
out.println("Connection : " + request.getHeader("Connection") + "<br>");
out.println("Cookie : " + request.getHeader("Cookie") + "<br>");
%>

 

 

關於request.getHeader("Referer")的說明  request.getHeader("Referer")擷取來訪者地址。只有通過 連結訪問當前頁的時候，才能擷取上一頁的地址；否則request.getHeader("Referer")的值為Null，通過window.open開啟當前頁或者直接輸入地址，也為Null。