微信好友分析之獲取好友信息

             點擊我前往Github查看源代碼

本項目已經上傳到github上面：https://github.com/wangqifan/WeChatAnalyse

這個Demo是利用HttpWebRequest和HttpWebResponse來爬取微信好友，講信息存入數據庫，並對信息進行分析，用圖標畫出來。

如何獲得好友信息

 首先前往https://wx.qq.com/登錄自己的微信賬號，打開瀏覽器的開發者控制台

微信給后台發送了幾十個請求，我翻遍了所有請求，終於找到了想要的url

借助瀏覽器我們可以獲取這個請求的信息

我們可以把這個數據交給程序讓程序幫我們取請求，並把數據保存下來

前期准備新建一個名為WeChatAnalyse的項目

借助nuget安裝Entity Framwork和Json.net我們待會要使用這兩個框架，順便修改下配置文件

<connectionStrings>
        <add name="WeChartContex" connectionString="server=.;database=WeChat;uid=sa;pwd=000000"
          providerName="System.Data.SqlClient" />
    </connectionStrings>

創建model

我們再次回到瀏覽器控制台，分析服務器返回的數據

根據返回數據，我們可以建類 Friend

 [Key]
        public int Id { get; set; }
        public int Uin { get; set; }
        public string UserName { get; set; }
        public string NickName { get; set; }
        public string HeadImgUrl { get; set; }
        public int ContactFlag { get; set; }
        public int MemberCount { get; set; }
        public List<Friend> MemberList { get; set; }
        public string RemarkName { get; set; }
        public int HideInputBarFlag { get; set; }
        public int Sex { get; set; }
        public string Signature { get; set; }
        public int VerifyFlag { get; set; }
        public int OwnerUin { get; set; }
        public string PYInitial { get; set; }
        public string PYQuanPin { get; set; }
        public int StarFriend { get; set; }
        public int AppAccountFlag { get; set; }
        public int Statues { get; set; }
        public int AttrStatus { get; set; }
        public string Province { get; set; }
        public string City { get; set; }
        public string Alias { get; set; }
        public int SnsFlag { get; set; }
        public int UniFriend { get; set; }
        public string DisplayName { get; set; }
        public int ChatRoomId { get; set; }
        public string KeyWord { get; set; }
        public string EncryChatRoomId { get; set; }

類BaseResponse

 public class BaseResponse
    {
        //"Ret": 0, "ErrMsg": "" 
        public int Ret { get; set; }
        public string ErrMsg { get; set; }
    }

　　類Respone

 public class Respone
    {
        public BaseResponse respoen { get; set; }
        public int MemberCount { get; set; }
        public List<Friend> MemberList { get; set; }
    }

創建數據庫上下文

 public class WeChartContex:DbContext
    {
        public    DbSet<Friend> Fridens { get; set; }
    }

創建控制器Sprider

  給他添加一個數據庫上下文對象

 

WeChartContex context = new WeChartContex();

這種強耦合的代碼是不被推薦的，由於我們的Demo特別小，這里暫時這樣寫

 

public ActionResult GetFridendInformation()
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxgetcontact?r=1480564845349&seq=0&skey=@crypt_20089e09_d38ecc170f273d2db91833e793677276");
            request.Method = "get";
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0";
            request.Referer = "https://wx.qq.com/";
            // CookieContainer contain = new CookieContainer();

  
            request.Headers.Add("Cookie", "pgv_pvi=1499432960; pt2gguin=o1694675518; RK=; /=s7972417536; wxsid=tjF6UrJ2RcvNH76H; wxloadtime=1480564533_expired）;

           using(Stream dataStream = response.GetResponseStream())
          {
           using( StreamReader reader = new StreamReader(dataStream))
            {
            // Read the content.
            string responseFromServer = reader.ReadToEnd();
            Respone   responsefronserver = JsonHelper.DeserializeToObject<Respone>(responseFromServer);
            foreach (var item in responsefronserver.MemberList)
            {
                if(item.VerifyFlag==0) context.Fridens.Add(item);
            } 
              }
         }

    request.Abort();

if (context.SaveChanges()>0) { return Content("ok"); }


            return Content("fail");
        }

基本思路是根據URL來創建一個HttpWebRequest對象，它是用http協議來請求的，我們來設置UserAgent，cookie,這里的cookie我做了刪除，cookie應該即時取瀏覽器提取，保證它是新鮮的

 

   HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://wx.qq.com/cgi-bin/mmwebwx-bin/webwxgetcontact?r=1480564845349&seq=0&skey=@crypt_20089e09_d38ecc170f273d2db91833e793677276");
            request.Method = "get";
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0";
            request.Referer = "https://wx.qq.com/";
             request.Headers.Add("Cookie", "pgv_pvi=149943")

接下來創建HttpWebResponse對象來獲取數據，並進行反序列化

首先創建一個jsonhelp

 public class JsonHelper
    {
        /// <summary>
        /// 對數據進行序列化
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static string SerializeToString(object value)
        {
            return JsonConvert.SerializeObject(value);
        }
        /// <summary>
        /// 反序列化操作
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="str"></param>
        /// <returns></returns>
        public static T DeserializeToObject<T>(string str)
        {
            return JsonConvert.DeserializeObject<T>(str);
        }
}

接下來對返回的數據進行反序列化

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream dataStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(dataStream);
            // Read the content.
            string responseFromServer = reader.ReadToEnd();
            Respone   responsefronserver = JsonHelper.DeserializeToObject<Respone>(responseFromServer);

 

接下來保存到數據庫中，我們只要朋友的信息

  foreach (var item in responsefronserver.MemberList)
            {
                if(item.VerifyFlag==0) context.Fridens.Add(item);
            } 
            if (context.SaveChanges()>0)
            {
                return Content("ok");
            }

            return Content("fail");

VerifyFlag為0就是個人賬號，公眾號不為0

運行程序，進入Sprider/GetFridendInformation，返回OK執行成功

我一共有116個微信好友

博客推薦：

反反爬蟲策略：http://www.cnblogs.com/zuin/p/6323533.html

爬取知乎百萬爬蟲：http://www.cnblogs.com/zuin/p/6227834.html

Github:https://github.com/wangqifan/ZhiHu