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264 lines
11 KiB
264 lines
11 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.Runtime.Serialization;
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using System.IO;
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using System.Text;
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using System.Net;
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using System.Web.Security;
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using LitJson;
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namespace WxPayAPI
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{
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public class JsApiPay
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{
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/// <summary>
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/// 保存页面对象，因为要在类的方法中使用Page的Request对象
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/// </summary>
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private Page page { get; set; }
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/// <summary>
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/// openid用于调用统一下单接口
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/// </summary>
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public string openid { get; set; }
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/// <summary>
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/// access_token用于获取收货地址js函数入口参数
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/// </summary>
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public string access_token { get; set; }
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/// <summary>
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/// out_trade_no 商家订单号
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/// </summary>
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public string out_trade_no { get; set; }
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/// <summary>
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/// 商品金额，用于统一下单
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/// </summary>
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public int total_fee { get; set; }
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/// <summary>
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/// 统一下单接口返回结果
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/// </summary>
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public WxPayData unifiedOrderResult { get; set; }
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public JsApiPay(Page page)
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{
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this.page = page;
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}
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/**
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*
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* 网页授权获取用户基本信息的全部过程
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* 详情请参看网页授权获取用户基本信息：http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html
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* 第一步：利用url跳转获取code
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* 第二步：利用code去获取openid和access_token
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*
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*/
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public void GetOpenidAndAccessToken()
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{
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if (!string.IsNullOrEmpty(page.Request.QueryString["code"]))
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{
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//获取code码，以获取openid和access_token
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string code = page.Request.QueryString["code"];
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Log.Debug(this.GetType().ToString(), "Get code : " + code);
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GetOpenidAndAccessTokenFromCode(code);
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}
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else
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{
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//构造网页授权获取code的URL
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string host = page.Request.Url.Host;
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string path = page.Request.Path;
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string redirect_uri = page.Server.UrlEncode(HttpContext.Current.Request.Url.ToString());
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WxPayData data = new WxPayData();
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data.SetValue("appid", WxPayConfig.APPID);
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data.SetValue("redirect_uri", redirect_uri);
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data.SetValue("response_type", "code");
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data.SetValue("scope", "snsapi_base");
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data.SetValue("state", "STATE" + "#wechat_redirect");
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string url = "https://open.weixin.qq.com/connect/oauth2/authorize?" + data.ToUrl();
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Log.Debug(this.GetType().ToString(), "Will Redirect to URL : " + url);
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try
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{
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//触发微信返回code码
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page.Response.Redirect(url);//Redirect函数会抛出ThreadAbortException异常，不用处理这个异常
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}
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catch (System.Threading.ThreadAbortException ex)
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{
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}
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//page.Response.Write("Page:" + url + "<br>--------<br>" + redirect_uri + "<br>--------<br>");
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}
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}
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/**
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*
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* 通过code换取网页授权access_token和openid的返回数据，正确时返回的JSON数据包如下：
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* {
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* "access_token":"ACCESS_TOKEN",
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* "expires_in":7200,
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* "refresh_token":"REFRESH_TOKEN",
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* "openid":"OPENID",
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* "scope":"SCOPE",
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* "unionid": "o6_bmasdasdsad6_2sgVt7hMZOPfL"
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* }
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* 其中access_token可用于获取共享收货地址
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* openid是微信支付jsapi支付接口统一下单时必须的参数
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* 更详细的说明请参考网页授权获取用户基本信息：http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html
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* @失败时抛异常WxPayException
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*/
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public void GetOpenidAndAccessTokenFromCode(string code)
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{
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try
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{
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//构造获取openid及access_token的url
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WxPayData data = new WxPayData();
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data.SetValue("appid", WxPayConfig.APPID);
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data.SetValue("secret", WxPayConfig.APPSECRET);
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data.SetValue("code", code);
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data.SetValue("grant_type", "authorization_code");
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string url = "https://api.weixin.qq.com/sns/oauth2/access_token?" + data.ToUrl();
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//请求url以获取数据
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string result = HttpService.Get(url);
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Log.Debug(this.GetType().ToString(), "GetOpenidAndAccessTokenFromCode response : " + result);
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//保存access_token，用于收货地址获取
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JsonData jd = JsonMapper.ToObject(result);
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access_token = (string)jd["access_token"];
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//获取用户openid
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openid = (string)jd["openid"];
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Log.Debug(this.GetType().ToString(), "Get openid : " + openid);
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Log.Debug(this.GetType().ToString(), "Get access_token : " + access_token);
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}
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catch (Exception ex)
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{
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Log.Error(this.GetType().ToString(), ex.ToString());
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throw new WxPayException(ex.ToString());
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}
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}
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/**
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* 调用统一下单，获得下单结果
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* @return 统一下单结果
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* @失败时抛异常WxPayException
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*/
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public WxPayData GetUnifiedOrderResult()
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{
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//统一下单
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WxPayData data = new WxPayData();
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data.SetValue("body", "百花网购物/" + out_trade_no);
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data.SetValue("attach", "百花网购物");
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data.SetValue("out_trade_no", out_trade_no);
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data.SetValue("total_fee", total_fee);
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data.SetValue("time_start", DateTime.Now.ToString("yyyyMMddHHmmss"));
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data.SetValue("time_expire", DateTime.Now.AddMinutes(10).ToString("yyyyMMddHHmmss"));
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data.SetValue("goods_tag", "百花网购物");
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data.SetValue("trade_type", "JSAPI");
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data.SetValue("openid", openid);
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WxPayData result = WxPayApi.UnifiedOrder(data);
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if (!result.IsSet("appid") || !result.IsSet("prepay_id") || result.GetValue("prepay_id").ToString() == "")
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{
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Log.Error(this.GetType().ToString(), "UnifiedOrder response error!");
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throw new WxPayException("UnifiedOrder response error!");
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}
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unifiedOrderResult = result;
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return result;
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}
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/**
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*
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* 从统一下单成功返回的数据中获取微信浏览器调起jsapi支付所需的参数，
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* 微信浏览器调起JSAPI时的输入参数格式如下：
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* {
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* "appId" : "wx2421b1c4370ec43b", //公众号名称，由商户传入
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* "timeStamp":" 1395712654", //时间戳，自1970年以来的秒数
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* "nonceStr" : "e61463f8efa94090b1f366cccfbbb444", //随机串
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* "package" : "prepay_id=u802345jgfjsdfgsdg888",
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* "signType" : "MD5", //微信签名方式:
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* "paySign" : "70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信签名
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* }
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* @return string 微信浏览器调起JSAPI时的输入参数，json格式可以直接做参数用
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* 更详细的说明请参考网页端调起支付API：http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7
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*
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*/
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public string GetJsApiParameters()
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{
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Log.Debug(this.GetType().ToString(), "JsApiPay::GetJsApiParam is processing...");
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WxPayData jsApiParam = new WxPayData();
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jsApiParam.SetValue("appId", unifiedOrderResult.GetValue("appid"));
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jsApiParam.SetValue("timeStamp", WxPayApi.GenerateTimeStamp());
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jsApiParam.SetValue("nonceStr", WxPayApi.GenerateNonceStr());
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jsApiParam.SetValue("package", "prepay_id=" + unifiedOrderResult.GetValue("prepay_id"));
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jsApiParam.SetValue("signType", "MD5");
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jsApiParam.SetValue("paySign", jsApiParam.MakeSign());
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string parameters = jsApiParam.ToJson();
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Log.Debug(this.GetType().ToString(), "Get jsApiParam : " + parameters);
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return parameters;
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}
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/**
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*
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* 获取收货地址js函数入口参数,详情请参考收货地址共享接口：http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_9
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* @return string 共享收货地址js函数需要的参数，json格式可以直接做参数使用
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*/
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public string GetEditAddressParameters()
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{
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string parameter = "";
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try
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{
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string host = page.Request.Url.Host;
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string path = page.Request.Path;
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string queryString = page.Request.Url.Query;
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//这个地方要注意，参与签名的是网页授权获取用户信息时微信后台回传的完整url
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string url = "http://" + host + path + queryString;
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//构造需要用SHA1算法加密的数据
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WxPayData signData = new WxPayData();
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signData.SetValue("appid", WxPayConfig.APPID);
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signData.SetValue("url", url);
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signData.SetValue("timestamp", WxPayApi.GenerateTimeStamp());
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signData.SetValue("noncestr", WxPayApi.GenerateNonceStr());
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signData.SetValue("accesstoken", access_token);
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string param = signData.ToUrl();
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Log.Debug(this.GetType().ToString(), "SHA1 encrypt param : " + param);
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//SHA1加密
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string addrSign = FormsAuthentication.HashPasswordForStoringInConfigFile(param, "SHA1");
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Log.Debug(this.GetType().ToString(), "SHA1 encrypt result : " + addrSign);
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//获取收货地址js函数入口参数
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WxPayData afterData = new WxPayData();
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afterData.SetValue("appId", WxPayConfig.APPID);
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afterData.SetValue("scope", "jsapi_address");
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afterData.SetValue("signType", "sha1");
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afterData.SetValue("addrSign", addrSign);
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afterData.SetValue("timeStamp", signData.GetValue("timestamp"));
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afterData.SetValue("nonceStr", signData.GetValue("noncestr"));
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//转为json格式
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parameter = afterData.ToJson();
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Log.Debug(this.GetType().ToString(), "Get EditAddressParam : " + parameter);
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}
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catch (Exception ex)
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{
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Log.Error(this.GetType().ToString(), ex.ToString());
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throw new WxPayException(ex.ToString());
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}
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return parameter;
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}
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}
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}
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