微信好友分析之获取好友信息

这个Demo是利用HttpWebRequest和HttpWebResponse来爬取微信好友，讲信息存入数据库，并对信息进行分析，用图标画出来。

如何获得好友信息

首先前往https://wx.qq.com/登录自己的微信账号，打开浏览器的开发者控制台



微信给后台发送了几十个请求，我翻遍了所有请求，终于找到了想要的url

借助浏览器我们可以获取这个请求的信息



我们可以把这个数据交给程序让程序帮我们取请求，并把数据保存下来

前期准备新建一个名为WeChatAnalyse的项目



借助nuget安装Entity Framwork和Json.net我们待会要使用这两个框架，顺便修改下配置文件

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

创建model

我们再次回到浏览器控制台，分析服务器返回的数据



根据返回数据，我们可以建类 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; }

类BaseResponse

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

　　类Respone

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

创建数据库上下文

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

创建控制器Sprider

给他添加一个数据库上下文对象

WeChartContex context = new WeChartContex();

这种强耦合的代码是不被推荐的，由于我们的Demo特别小，这里暂时这样写

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"); }

基本思路是根据URL来创建一个HttpWebRequest对象，它是用http协议来请求的，我们来设置UserAgent，cookie,这里的cookie我做了删除，cookie应该即时取浏览器提取，保证它是新鲜的

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")

接下来创建HttpWebResponse对象来获取数据，并进行反序列化

首先创建一个jsonhelp

public class JsonHelper { /// <summary>
/// 对数据进行序列化 /// </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); }
}

接下来对返回的数据进行反序列化

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);

接下来保存到数据库中，我们只要朋友的信息

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为0就是个人账号，公众号不为0

运行程序，进入Sprider/GetFridendInformation，返回OK执行成功



我一共有116个微信好友