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71 lines
2.3 KiB
71 lines
2.3 KiB
using System;
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using System.Collections.Generic;
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using System.Web;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Text;
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namespace WxPayAPI
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{
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/// <summary>
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/// 回调处理基类
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/// 主要负责接收微信支付后台发送过来的数据，对数据进行签名验证
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/// 子类在此类基础上进行派生并重写自己的回调处理过程
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/// </summary>
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public class Notify
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{
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public Page page {get;set;}
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public Notify(Page page)
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{
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this.page = page;
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}
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/// <summary>
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/// 接收从微信支付后台发送过来的数据并验证签名
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/// </summary>
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/// <returns>微信支付后台返回的数据</returns>
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public WxPayData GetNotifyData()
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{
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//接收从微信后台POST过来的数据
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System.IO.Stream s = page.Request.InputStream;
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int count = 0;
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byte[] buffer = new byte[1024];
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StringBuilder builder = new StringBuilder();
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while ((count = s.Read(buffer, 0, 1024)) > 0)
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{
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builder.Append(Encoding.UTF8.GetString(buffer, 0, count));
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}
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s.Flush();
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s.Close();
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s.Dispose();
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Log.Info(this.GetType().ToString(), "Receive data from WeChat : " + builder.ToString());
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//转换数据格式并验证签名
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WxPayData data = new WxPayData();
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try
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{
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data.FromXml(builder.ToString());
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}
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catch(WxPayException ex)
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{
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//若签名错误，则立即返回结果给微信支付后台
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WxPayData res = new WxPayData();
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res.SetValue("return_code", "FAIL");
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res.SetValue("return_msg", ex.Message);
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Log.Error(this.GetType().ToString(), "Sign check error : " + res.ToXml());
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page.Response.Write(res.ToXml());
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page.Response.End();
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}
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Log.Info(this.GetType().ToString(), "Check sign success");
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return data;
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}
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//派生类需要重写这个方法，进行不同的回调处理
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public virtual void ProcessNotify()
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{
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}
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}
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}
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