利用.net4.0的dynamic特性制造的超级简单的微信SDK

1.基础支持API

/*--------------------------------------------------------------------------
* BasicAPI.cs
 *Auth:deepleo
* Date:2013.12.31
* Email:2586662969@qq.com
*--------------------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Http;
using Codeplex.Data;
using System.IO;

namespace Deepleo.Weixin.SDK
{
    /// <summary>
    /// 对应微信API的 "基础支持"
    /// </summary>
    public class BasicAPI
    {
        /// <summary>
        /// 检查签名是否正确:
        /// http://mp.weixin.qq.com/wiki/index.php?title=%E6%8E%A5%E5%85%A5%E6%8C%87%E5%8D%97
        /// </summary>
        /// <param name="signature"></param>
        /// <param name="timestamp"></param>
        /// <param name="nonce"></param>
        /// <param name="token">AccessToken</param>
        /// <returns>
        /// true: check signature success
        /// false: check failed, 非微信官方调用!
        /// </returns>
        public static bool CheckSignature(string signature, string timestamp, string nonce, string token, out string ent)
        {
            var arr = new[] { token, timestamp, nonce }.OrderBy(z => z).ToArray();
            var arrString = string.Join("", arr);
            var sha1 = System.Security.Cryptography.SHA1.Create();
            var sha1Arr = sha1.ComputeHash(Encoding.UTF8.GetBytes(arrString));
            StringBuilder enText = new StringBuilder();
            foreach (var b in sha1Arr)
            {
                enText.AppendFormat("{0:x2}", b);
            }
            ent = enText.ToString();
            return signature == enText.ToString();
        }

        /// <summary>
        /// 获取AccessToken
        /// http://mp.weixin.qq.com/wiki/index.php?title=%E8%8E%B7%E5%8F%96access_token
        /// </summary>
        /// <param name="grant_type"></param>
        /// <param name="appid"></param>
        /// <param name="secrect"></param>
        /// <returns>access_toke</returns>
        public static dynamic GetAccessToken( string appid, string secrect)
        {
            var url = string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type={0}&appid={1}&secret={2}", "client_credential", appid, secrect);
            var client = new HttpClient();
            var result = client.GetAsync(url).Result;
            if (!result.IsSuccessStatusCode) return string.Empty;
            var token = DynamicJson.Parse(result.Content.ReadAsStringAsync().Result);
            return token;
        }

        /// <summary>
        /// 上传多媒体文件
        /// http://mp.weixin.qq.com/wiki/index.php?title=%E4%B8%8A%E4%BC%A0%E4%B8%8B%E8%BD%BD%E5%A4%9A%E5%AA%92%E4%BD%93%E6%96%87%E4%BB%B6
        /// 1.上传的媒体文件限制：
        ///图片（image) : 1MB，支持JPG格式
        ///语音（voice）：1MB，播放长度不超过60s，支持MP4格式
        ///视频（video）：10MB，支持MP4格式
        ///缩略图（thumb)：64KB，支持JPG格式
        ///2.媒体文件在后台保存时间为3天，即3天后media_id失效
        /// </summary>
        /// <param name="token"></param>
        /// <param name="type"></param>
        /// <param name="file"></param>
        /// <returns>media_id</returns>
        public static string UploadMedia(string token, string type, string file)
        {
            var url = string.Format("http://api.weixin.qq.com/cgi-bin/media/upload?access_token={0}&type={1}&filename={2}", token, type, Path.GetFileName(file));
            var client = new HttpClient();
            var result = client.PostAsync(url, new StreamContent(new FileStream(file, FileMode.Open, FileAccess.Read)));
            if (!result.Result.IsSuccessStatusCode) return string.Empty;
            var media = DynamicJson.Parse(result.Result.Content.ReadAsStringAsync().Result);
            return media.media_id;
        }

    }
}

2.接收消息

/*--------------------------------------------------------------------------
* AcceptMessageAPI.cs
 *Auth:deepleo
* Date:2013.12.31
* Email:2586662969@qq.com
*--------------------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Dynamic;
using System.Xml.Linq;
using System.Xml;
using Codeplex.Data;

namespace Deepleo.Weixin.SDK
{
    /// <summary>
    ///  对应微信API的 "接收消息"
    /// </summary>
    public class AcceptMessageAPI
    {
        /// <summary>
        /// 解析微信服务器推送的消息
        /// http://mp.weixin.qq.com/wiki/index.php?title=%E6%8E%A5%E6%94%B6%E6%99%AE%E9%80%9A%E6%B6%88%E6%81%AF
        /// http://mp.weixin.qq.com/wiki/index.php?title=%E6%8E%A5%E6%94%B6%E4%BA%8B%E4%BB%B6%E6%8E%A8%E9%80%81
        /// </summary>
        /// <param name="message"></param>
        /// <returns></returns>
        public static WeixinMessage Parse(string message)
        {
            var msg = new WeixinMessage();
            msg.Body = new DynamicXml(message);
            string msgType = msg.Body.MsgType.Value;
            switch (msgType)
            {
                case "text":
                    msg.Type = WeixinMessageType.Text;
                    break;
                case "image":
                    msg.Type = WeixinMessageType.Image;
                    break;
                case "voice":
                    msg.Type = WeixinMessageType.Voice;
                    break;
                case "video":
                    msg.Type = WeixinMessageType.Video;
                    break;
                case "location":
                    msg.Type = WeixinMessageType.Location;
                    break;
                case "link":
                    msg.Type = WeixinMessageType.Link;
                    break;
                case "event":
                    msg.Type = WeixinMessageType.Event;
                    break;
                default: throw new Exception("does not support this message type:" + msgType);
            }
            return msg;
        }

    }
}

3.发送消息

/*--------------------------------------------------------------------------
* SendMessageAPI.cs
 *Auth:deepleo
* Date:2013.12.31
* Email:2586662969@qq.com
*--------------------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Codeplex.Data;
using System.Net;
using System.Net.Http;

namespace Deepleo.Weixin.SDK
{
    /// <summary>
    /// 对应微信API的 "发送消息”
    /// </summary>
    public class SendMessageAPI
    {
        /// <summary>
        /// 被动回复消息
        /// </summary>
        /// <param name="message">微信服务器推送的消息</param>
        /// <param name="executor">用户自定义的消息执行者</param>
        /// <returns></returns>
        public static string Relay(WeixinMessage message, IWeixinExecutor executor)
        {
            return executor.Execute(message);
        }

        /// <summary>
        /// 主动发送客服消息
        /// http://mp.weixin.qq.com/wiki/index.php?title=%E5%8F%91%E9%80%81%E5%AE%A2%E6%9C%8D%E6%B6%88%E6%81%AF
        /// 当用户主动发消息给公众号的时候
        /// 开发者在一段时间内（目前为24小时）可以调用客服消息接口，在24小时内不限制发送次数。
        /// </summary>
        /// <param name="token"></param>
        /// <param name="msg">json格式的消息，具体格式请参考微信官方API</param>
        /// <returns></returns>
        public static bool Send(string token, string msg)
        {
            var client = new HttpClient();
            var task = client.PostAsync(string.Format("https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={0}", token), new StringContent(msg)).Result;
            return task.IsSuccessStatusCode;
        }
    }
}

4.用户管理

/*--------------------------------------------------------------------------
* UserAdminAPI.cs
 *Auth:deepleo
* Date:2013.12.31
* Email:2586662969@qq.com
*--------------------------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Http;
using Codeplex.Data;

namespace Deepleo.Weixin.SDK
{
    /// <summary>
    ///  对应微信API的 "用户管理"
    ///  注意：
    ///  1.以下API未实现 ：
    ///    "分组管理接口"，“网页授权获取用户基本信息”
    ///  2.获取用户"地理位置"API 见AcceptMessageAPI实现，
    ///     “地理位置”获取方式有两种：一种是仅在进入会话时上报一次，一种是进入会话后每隔5秒上报一次，公众号可以在公众平台网站中设置。
    /// </summary>
    public class UserAdminAPI
    {
        /// <summary>
        /// 获取用户基本信息
        /// </summary>
        /// <param name="token"></param>
        /// <param name="openId"></param>
        /// <returns></returns>
        public static dynamic GetInfo(string token, string openId)
        {
            var client = new HttpClient();
            var result = client.GetAsync(string.Format("https://api.weixin.qq.com/cgi-bin/user/info?access_token={0}&openid={1}", token, openId)).Result;
            if (!result.IsSuccessStatusCode) return null;
            return DynamicJson.Parse(result.Content.ReadAsStringAsync().Result);
        }

        /// <summary>
        /// 获取订阅者信息
        /// </summary>
        /// <param name="token"></param>
        /// <returns></returns>
        public static dynamic GetSubscribes(string token)
        {
            var client = new HttpClient();
            var result = client.GetAsync(string.Format("https://api.weixin.qq.com/cgi-bin/user/get?access_token={0}", token)).Result;
            if (!result.IsSuccessStatusCode) return null;
            return DynamicJson.Parse(result.Content.ReadAsStringAsync().Result);
        }

        /// <summary>
        /// 获取订阅者信息
        /// </summary>
        /// <param name="token"></param>
        /// <param name="nextOpenId"></param>
        /// <returns></returns>
        public static dynamic GetSubscribes(string token, string nextOpenId)
        {
            var client = new HttpClient();
            var result = client.GetAsync(string.Format("https://api.weixin.qq.com/cgi-bin/user/get?access_token={0}&next_openid={1}", token, nextOpenId)).Result;
            if (!result.IsSuccessStatusCode) return null;
            return DynamicJson.Parse(result.Content.ReadAsStringAsync().Result);
        }
    }
}

5.自定义菜单

/*--------------------------------------------------------------------------
* CustomMenu.cs
 *Auth:deepleo
* Date:2013.12.31
* Email:2586662969@qq.com
*--------------------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Http;
using Codeplex.Data;

namespace Deepleo.Weixin.SDK
{
    /// <summary>
    /// 对应微信API的 "自定义菜单”
    /// 注意：自定义菜单事件推送接口见：AcceptMessageAPI
    /// </summary>
    public class CustomMenuAPI
    {
        /// <summary>
        /// 自定义菜单创建接口
        /// </summary>
        /// <param name="token"></param>
        /// <param name="content"></param>
        /// <returns></returns>
        public static bool Create(string token, string content)
        {
            var client = new HttpClient();
            var result = client.PostAsync(string.Format("https://api.weixin.qq.com/cgi-bin/menu/create?access_token={0}", token), new StringContent(content)).Result;
            return DynamicJson.Parse(result.Content.ReadAsStringAsync().Result).errcode == ;
        }

        /// <summary>
        /// 自定义菜单查询接口
        /// </summary>
        /// <param name="token"></param>
        /// <returns></returns>
        public static dynamic Query(string token)
        {
            var client = new HttpClient();
            var result = client.GetAsync(string.Format("https://api.weixin.qq.com/cgi-bin/menu/get?access_token={0}", token)).Result;
            if (!result.IsSuccessStatusCode) return null;
            return DynamicJson.Parse(result.Content.ReadAsStringAsync().Result);
        }

        /// <summary>
        /// 自定义菜单删除接口
        /// </summary>
        /// <param name="token"></param>
        /// <returns></returns>
        public static bool Delete(string token)
        {
            var client = new HttpClient();
            var result = client.GetAsync(string.Format("https://api.weixin.qq.com/cgi-bin/menu/delete?access_token={0}", token)).Result;
            if (!result.IsSuccessStatusCode) return false;
            return DynamicJson.Parse(result.Content.ReadAsStringAsync().Result).errmsg == "ok";
        }

    }
}

详细：https://github.com/night-king/weixinSDK

关于DynamicJson和Dynamicxml请参考：上一篇文章：http://www.cnblogs.com/deepleo/p/weixinSDK.html

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