最近研究微信公众平台,这里整理了一下向特定用户推送消息的思路
一、首先需要将微信的openid与系统用户绑定。
在用户关注公众平台的时候,回复一个链接,要求用户绑定,可以设计如下消息进行回复,(openid最好进行加密处理,后者还需要用这个字段绑定fakeid)。
欢迎关注有问必答平台,< a href='http://myweixin123.duapp.com/bind.html?openid=@openid'>点击此处进行用户绑定</ a >!
|
在bind.html页面将openid与系统的usercode进行绑定,这个绑定过程非常简单,这里不详叙述。
二、将openid与fakeid进行绑定
微信公众平台是一回一答的模式;但是在微信公众平台后台,可以向特定用户进行消息发送。我们利用这个机制使用代码去模拟这个过程来实现消息推送。
首先需要模拟登录:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Security.Cryptography;
using System.Text;
using System.Net;
using System.IO;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
/// <summary> ///WeiXinLogin 的摘要说明 /// </summary> public class WeiXinLogin
{ /// <summary>
/// MD5 32位加密
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
static string GetMd5Str32( string str)
{
MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
// Convert the input string to a byte array and compute the hash.
char [] temp = str.ToCharArray();
byte [] buf = new byte [temp.Length];
for ( int i = 0; i < temp.Length; i++)
{
buf[i] = ( byte )temp[i];
}
byte [] data = md5Hasher.ComputeHash(buf);
// Create a new Stringbuilder to collect the bytes
// and create a string.
StringBuilder sBuilder = new StringBuilder();
// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
for ( int i = 0; i < data.Length; i++)
{
sBuilder.Append(data[i].ToString( "x2" ));
}
// Return the hexadecimal string.
return sBuilder.ToString();
}
public static bool ExecLogin( string name, string pass)
{
bool result = false ;
string password = GetMd5Str32(pass).ToUpper();
string padata = "username=" + name + "&pwd=" + password + "&imgcode=&f=json" ;
string url = "https://mp.weixin.qq.com/cgi-bin/login?lang=zh_CN " ;//请求登录的URL
try
{
CookieContainer cc = new CookieContainer(); //接收缓存
byte [] byteArray = Encoding.UTF8.GetBytes(padata); // 转化
HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(url); //新建一个WebRequest对象用来请求或者响应url
ServicePointManager.CertificatePolicy = new AcceptAllCertificatePolicy();
webRequest2.CookieContainer = cc; //保存cookie
webRequest2.Method = "POST" ; //请求方式是POST
webRequest2.UserAgent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.69 Safari/537.36" ;
webRequest2.Referer = "https://mp.weixin.qq.com/" ;
webRequest2.ContentType = "application/x-www-form-urlencoded" ; //请求的内容格式为application/x-www-form-urlencoded
webRequest2.ContentLength = byteArray.Length;
Stream newStream = webRequest2.GetRequestStream(); //返回用于将数据写入 Internet 资源的 Stream。
// Send the data.
newStream.Write(byteArray, 0, byteArray.Length); //写入参数
newStream.Close();
HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();
StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.Default);
string text2 = sr2.ReadToEnd();
//此处用到了newtonsoft来序列化
WeiXinRetInfo retinfo = Newtonsoft.Json.JsonConvert.DeserializeObject<WeiXinRetInfo>(text2);
string token = string .Empty;
if (retinfo.ErrMsg.Length > 0)
{
token = retinfo.ErrMsg.Split( new char [] { '&' })[2].Split( new char [] { '=' })[1].ToString(); //取得令牌
LoginInfo.LoginCookie = cc;
LoginInfo.CreateDate = DateTime.Now;
LoginInfo.Token = token;
result = true ;
}
}
catch (Exception ex)
{
throw new Exception(ex.StackTrace);
}
return result;
}
public static class LoginInfo
{
/// <summary>
/// 登录后得到的令牌
/// </summary>
public static string Token { get ; set ; }
/// <summary>
/// 登录后得到的cookie
/// </summary>
public static CookieContainer LoginCookie { get ; set ; }
/// <summary>
/// 创建时间
/// </summary>
public static DateTime CreateDate { get ; set ; }
}
internal class AcceptAllCertificatePolicy : ICertificatePolicy
{
public AcceptAllCertificatePolicy()
{
}
public bool CheckValidationResult(ServicePoint sPoint,
X509Certificate cert, WebRequest wRequest, int certProb)
{
// Always accept
return true ;
}
}
} |
获取fakeid
public static ArrayList SubscribeMP()
{ try
{
CookieContainer cookie = null ;
string token = null ;
cookie = WeiXinLogin.LoginInfo.LoginCookie; //取得cookie
token = WeiXinLogin.LoginInfo.Token; //取得token
/*获取用户信息的url,这里有几个参数给大家讲一下,1.token此参数为上面的token 2.pagesize此参数为每一页显示的记录条数
3.pageid为当前的页数,4.groupid为微信公众平台的用户分组的组id,当然这也是我的猜想不一定正确*/
string Url = "https://mp.weixin.qq.com/cgi-bin/contactmanage?t=user/index&pagesize=10&pageidx=0&type=0&groupid=0&token=" + token + "&lang=zh_CN" ;
HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(Url);
webRequest2.CookieContainer = cookie;
webRequest2.ContentType = "text/html; charset=UTF-8" ;
webRequest2.Method = "GET" ;
webRequest2.UserAgent = "Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1" ;
webRequest2.ContentType = "application/x-www-form-urlencoded" ;
HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();
StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.Default);
string text2 = sr2.ReadToEnd();
MatchCollection mc;
//由于此方法获取过来的信息是一个html网页所以此处使用了正则表达式,注意:(此正则表达式只是获取了fakeid的信息如果想获得一些其他的信息修改此处的正则表达式就可以了。)
Regex r = new Regex( "\"id\"\\:\\d+,\"nick_name\"" ); //定义一个Regex对象实例
mc = r.Matches(text2);
Int32 friendSum = mc.Count; //好友总数
string fackID = "" ;
ArrayList fackID1 = new ArrayList();
for ( int i = 0; i < friendSum; i++)
{
//"id":208989515,"nick_name"
fackID = mc[i].Value.Replace( ",\"nick_name\"" , "" ).Split( new char [] { ':' })[1];
fackID = fackID.Replace( "\"" , "" ).Trim();
fackID1.Add(fackID);
}
return fackID1;
}
catch (Exception ex)
{
throw new Exception(ex.StackTrace);
}
} |
根据fakeid获取openid
public static string GetOpenidByFakeid(string fakeid) { try { CookieContainer cookie = null; string token = null; cookie = WeiXinLogin.LoginInfo.LoginCookie;//取得cookie token = WeiXinLogin.LoginInfo.Token;//取得token string Url = "https://mp.weixin.qq.com/cgi-bin/singlemsgpage?msgid=&source=&count=20&t=wxm-singlechat&fromfakeid=" + fakeid + "&token=" + token + "&lang=zh_CN"; HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(Url); webRequest2.CookieContainer = cookie; webRequest2.ContentType = "text/html; charset=UTF-8"; webRequest2.Method = "GET"; webRequest2.UserAgent = "Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1"; webRequest2.ContentType = "application/x-www-form-urlencoded"; HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse(); StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.UTF8); string text2 = sr2.ReadToEnd(); HtmlDocument doc = new HtmlDocument(); doc.LoadHtml(text2); var str = doc.GetElementbyId("json-msgList").InnerHtml; JArray messages = JArray.Parse(str); foreach (var message in messages) { string strContent = HttpUtility.HtmlDecode(message["content"].ToString()); Regex reg = new Regex(@"(?is)<a[^>]*?href=(['""\s]?)(?<href>[^'""\s]*)\1[^>]*?>"); MatchCollection match = reg.Matches(strContent); var href = ""; foreach (Match m in match) { href = m.Groups["href"].Value; } var openid = GetUrlParamValue(href, "openid"); if (!string.IsNullOrEmpty(openid)) return openid; } return ""; } catch (Exception ex) { return ""; } }
由于之前有建立openid与usercode的关系,所以可以根据usercode找到openid,又可以根据openid找到fakeid。使用下面代码进行推送:
public static bool SendMessage( string Message, string fakeid)
{ bool result = false ;
CookieContainer cookie = null ;
string token = null ;
cookie = WeiXinLogin.LoginInfo.LoginCookie; //取得cookie
token = WeiXinLogin.LoginInfo.Token; //取得token
string strMsg = System.Web.HttpUtility.UrlEncode(Message); //对传递过来的信息进行url编码
string padate = "type=1&content=" + strMsg + "&error=false&tofakeid=" + fakeid + "&token=" + token + "&ajax=1" ;
string url = "https://mp.weixin.qq.com/cgi-bin/singlesend?t=ajax-response&lang=zh_CN" ;
byte [] byteArray = Encoding.UTF8.GetBytes(padate); // 转化
HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(url);
webRequest2.CookieContainer = cookie; //登录时得到的缓存
webRequest2.Referer = "https://mp.weixin.qq.com/cgi-bin/singlemsgpage?token=" + token + "&fromfakeid=" + fakeid + "&msgid=&source=&count=20&t=wxm-singlechat&lang=zh_CN" ;
webRequest2.Method = "POST" ;
webRequest2.UserAgent = "Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1" ;
webRequest2.ContentType = "application/x-www-form-urlencoded" ;
webRequest2.ContentLength = byteArray.Length;
Stream newStream = webRequest2.GetRequestStream();
// Send the data.
newStream.Write(byteArray, 0, byteArray.Length); //写入参数
newStream.Close();
HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();
StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.Default);
string text2 = sr2.ReadToEnd();
if (text2.Contains( "ok" ))
{
result = true ;
}
return result;
} |
可以写一个长期运行的windows服务用于建立fakeid和openid的关系,这里不再详诉。
本文转自麒麟博客园博客,原文链接:http://www.cnblogs.com/zhuqil/p/3354640.html,如需转载请自行联系原作者