Request中藏了什么东东

女爷i 2022-04-06 03:10 251阅读 0赞

## 前言 ##

我们经常会用到后去PV，UV，有时候，

> 1、判断访问我们网站的ip，  
> 2、以及我们有多个域名，他想知道访问我们的是哪个域名，  
> 3、他想知道访问的是哪个路径（接口）

那么Request就必不可少楼

### 1、获取Request方法 ###

import org.springframework.web.context.request.RequestContextHolder;
    import org.springframework.web.context.request.ServletRequestAttributes;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    /** * 静态获取HttpServletRequest 和 session的方法 * 要使用此类需要在web.xml注册org.springframework.web.context.request.RequestContextListener */
    public class RequestHolder { 
    
        public static HttpSession getSession() { 
            HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
            return request.getSession();
        }
    
        public static HttpServletRequest getRequest() { 
            return ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
        }
    
        public static HttpServletResponse getResponse() { 
            return ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getResponse();
        }
    
    }

### 2、获取Ip ###

public static String getIp(){ 
            HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
            if(request==null)return null;
            String ip = request.getHeader("x-forwarded-for");
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
                ip = request.getHeader("X-Real-IP");
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { 
                ip = request.getRemoteAddr();
            }
            if(ip.toLowerCase().contains("x-forwarded-for")){ 
                String ip_temp = "";
                if(ip.contains(":") && ip.split(":").length>0 && !ip.endsWith(":")){ 
                    ip_temp = ip.split(":")[1];
                    if(StringUtils.isBlank(ip_temp)) ip_temp = ip.substring(0,ip.lastIndexOf("X-Forwarded-For"));
                }else{ 
                    ip_temp = ip.substring(0,ip.lastIndexOf("X-Forwarded-For"));
                }
                ip = ip_temp.replaceAll(" ","");
            }
            if (ip.indexOf(",") > -1) { 
                String ip_temp = ip.split(",")[0];
                ip_temp = ip_temp.replaceAll(" ", "");
                if(ip_temp.startsWith("10.") && ip.split(",").length>1){ 
                    ip = ip.split(",")[1];
                    ip = ip.replaceAll(" ", "");
                }else ip = ip_temp;
            }
            return ip;
        }

### 3、Request中的其他东西 ###

//http://test.healerjean.cn/healerjean/youhui/web/authorize?params=j4KDX9ovIC%2BD2dKT2FbgcKXduZ9FsJvN3Oq2Y4oBY5eq7qgl4x%2BWWQ%3D%3D
    
    //http://localhost:8081/healerjean/youhui/web/authorize?params=j4KDX9ovIC%2BD2dKT2FbgcKXduZ9FsJvN3Oq2Y4oBY5eq7qgl4x%2BWWQ%3D%3D

### 3.1、request.getRequestURL 获取全部路径 ###

log.info(request.getRequestURL().toString()); 全部路径，不带参数 http://localhost:8081/healerjean/youhui/web/authorize

### 3.2、request.getHeader(“host”) 获取域名+端口（主机名加端口，80不显示） ###

log.info(request.getHeader("host"));  //localhost:8081 test.healerjean.cn

### 3.3、request.getServerName 获取服务器的 主机名 ###

log.info(request.getServerName());       //localhost    test.healerjean.cn

### 3.4、request.getContextPath 、request.getServletPath 、request.getRequestURI具体路径 ###

//4、当然我们的Springboot项目中是没有用项目的名字的,下面来源于网络） 
    System.out.println(request.getContextPath()); ///可返回站点的根路径。也就是项目的名字 打印结果：/news 
    System.out.println(request.getServletPath()); //打印结果：/main/list.jsp 
    System.out.println(request.getRequestURI());  //打印结果：/news/main/list.jsp 
    
    我的项目中，因为没有项目的名字，所以下面二者显示的是一样的
    log.info(request.getRequestURI());  //我的项目中没有项目的名字 healerjean/youhui/web/authorize
    log.info(request.getServletPath());      //healerjean/youhui/web/authorize

### 3.5、request.getServerPort() 获取端口号 ###

log.info(request.getServerPort()+"");        //8081 80

### 3.6、request.getLocalPort() 获取本机端口号（第二个是阿里云的） ###

log.info(request.getLocalPort()+"");        //8081 8086

### 3.7、request.getQueryString() 访问的参数 ###

log.info(request.getQueryString()); //参数 ，只适用于get
    
    params=j4KDX9ovIC%2BD2dKT2FbgcKXduZ9FsJvN3Oq2Y4oBY5eq7qgl4x%2BWWQ%3D%3D

### 3.8、request.getHeader( “referer” ) 获取来源于上一次网页的url ###

如果是直接根据地址访问的则，则为null
    log.info(request.getHeader( "referer" )); //进入这个地址之前是从那个连接过来的，防盗连接使用

### 3.9、request.getMethod 获取请求方法 ###

request.getMethod() //POST 、GET

### 3.10、request.getContentType ContentType ###

request.getContentType()
    
    //get方法中 ：null
    //post方法 ：multipart/form-data; boundary=----WebKitFormBoundaryaIFtRs1mZ4nS9I7j

### 3.11、request.getParameterNames 获取参数 ###

不适用contentType为multipart/form-data

获取参数的名字，不管你代码里面接收不接收，反正我这里是可以获取到的
    request.getParameterNames()
    
       Enumeration enu=request.getParameterNames();
       while(enu.hasMoreElements()){ 
           String paraName=(String)enu.nextElement();
           System.out.println(paraName+": "+request.getParameter(paraName));
       }
            
    参数如下：
    accessDate: 2019-01-02 00:00:00
    pageNum: 1
    pageSize: 10
    post: Healerjean

### 3.12、request.getHeaderNames 获取head ###

request.getHeaderNames()
    
    Enumeration headerNames=request.getHeaderNames();
       while(headerNames.hasMoreElements()){ 
           String paraName=(String)headerNames.nextElement();
           System.out.println(paraName+": "+request.getHeader(paraName));
       }
    
    
    
    
    Post方法
    
    host: localhost:8081
    connection: keep-alive
    content-length: 453
    user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
    cache-control: no-cache
    origin: chrome-extension://fhbjgbiflinjbdggehcddcbncdddomop
    postman-token: bfd0da34-bed9-b903-e852-5656de78883c
    token: ZDjQ7mDEwlU7t6yEcAK2Xw==
    content-type: multipart/form-data; boundary=----WebKitFormBoundaryaIFtRs1mZ4nS9I7j
    accept: */* accept-encoding: gzip, deflate, br accept-language: en,zh-CN;q=0.9,zh;q=0.8 get方法 host: localhost:8081 connection: keep-alive cache-control: max-age=0 upgrade-insecure-requests: 1 user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36 accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
    accept-encoding: gzip, deflate, br
    accept-language: en,zh-CN;q=0.9,zh;q=0.8
    cookie: _Token=9UUife5cUeoOLO4AOaExoA==; _aToken=ceshib; ab.storage.userId.8f0d3f99-1e3f-4444-bb6c-f73da32cc97c=%7B%22g%22%3A%22437277%22%2C%22c%22%3A1546077272288%2C%22l%22%3A1546077272288%7D; ab.storage.deviceId.8f0d3f99-1e3f-4444-bb6c-f73da32cc97c=%7B%22g%22%3A%229a4b0cd9-da59-9c0e-5aee-a8356e4ea5dd%22%2C%22c%22%3A1546077272296%2C%22l%22%3A1546077272296%7D; ab.storage.sessionId.8f0d3f99-1e3f-4444-bb6c-f73da32cc97c=%7B%22g%22%3A%22c137279a-3f33-6df2-b1fa-189f47793f93%22%2C%22e%22%3A1546079072315%2C%22c%22%3A1546077272293%2C%22l%22%3A1546077272315%7D; CONTAINERID=7485f72559e40cd7d5f09b1347a03d3a73e9a0be752d74c0f76412a132033784|XC3gl|XC3gW; JSESSIONID=13A2286D04353AD554B27FF77DF8CABA

### 3.13、request.getParameterMap 获取参数map值 ###

不适用contentType为multipart/form-data

request.getParameterMap()
    
    
    Map<String, String[]> parameterMap = request.getParameterMap();
    log.info(JsonUtils.toJson(parameterMap));
    for (Map.Entry<String, String[]> entry : parameterMap.entrySet()) { 
      System.out.println(entry.getKey());
      for (String string : entry.getValue()) { 
          System.out.println(string);
      }
      System.out.println("----------------");
    }

### 4、对于大数据参数的读取 ###

1.getQueryString()
    只适用于GET,比如客户端发送http://localhost/testServlet?a=b&c=d&e=f,通过request.getQueryString()得到的是a=b&c=d&e=f.
    
    2.getParameter()
    GET和POST都可以使用
    
    但如果是POST请求要根据，表单提交数据的编码方式来确定能否使用.当编码方式是(application/x- www-form-urlencoded)时才能使用.
    
    这种编码方式(application/x-www-form-urlencoded)虽然简单，但对于传输大块的二进制数据显得力不从心.
    
    
    
    
    对于传输大块的二进制数这类数据，浏览器采用了另一种编码方式("multipart/form-data"),这时就需要使用下面的两种方法.
    
    3.getInputStream()
    4.getReader()
    上面两种方法获取的是Http请求包的包体,因为GET方式请求一般不包含包体.所以上面两种方法一般用于POST请求获取参数.
    
    需要注意的是：
    request.getParameter()、 request.getInputStream()、request.getReader()这三种方法是有冲突的，因为流只能被读一次。所以一般使用一次就可以了

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[ContactAuthor]: /images/20220406/53513eeddbd04ded88d067100ef1f62f.png