本项目已经上传到github上面：/wangqifan/WeChatAnalyse
这个Demo是利用HttpWebRequest和HttpWebResponse来爬取微信好友列表，讲信息存入数据库，并对信息进行分析，用图标画出来。
如何获得微信好友列表信息
首先前往/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("/cgi-bin/mmwebwx-bin/webwxgetcontact?r=1480564845349&seq=0&skey=@crypt_9e09_d38ecc170f273d2db91833e793677276");request.Method = "get";request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/0101 Firefox/49.0";request.Referer = "/";// 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("/cgi-bin/mmwebwx-bin/webwxgetcontact?r=1480564845349&seq=0&skey=@crypt_9e09_d38ecc170f273d2db91833e793677276");request.Method = "get";request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/0101 Firefox/49.0";request.Referer = "/";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。这样就用爬虫实现：获取微信好友列表爬取进行好友分析。
更多关于微信好友列表获取交流可加q群：753876674 一起交流学习。
