<%@ page contentType="text/plain; charset=UTF-8"%>
<%@ page language="java"%>
<%@ page import="org.apache.commons.httpclient.*,org.apache.commons.httpclient.methods.GetMethod"%>
<%
    out.clear();                                    //清空當前的輸出內容（空格和換行符）

    boolean serverOK = false;                       //檢查結果標識，默認為false
    String url = request.getParameter("url");       //獲取URL地址
    HttpClient client = new HttpClient();           //創建Http客戶端對象
    GetMethod method = new GetMethod(url);          //創建一個Get請求方法
    try {
        int statusCode = client.executeMethod(method);  //執行Get請求方法，獲取結果狀態
        //如果狀態為HttpStatus.SC_OK，即200，則設置檢查結果為true
        if (statusCode == HttpStatus.SC_OK) {
            serverOK = true;
        }
    } catch (Exception e) {
    } finally {
        method.releaseConnection();                 //釋放Http連接
    }

    //根據serverOK標識輸出不同信息
    if (serverOK) {
        out.println("<span class='ok'>檢查正常</span>");
    } else {
        out.println("<span class='error'>出現異常</span>");
    }
%>