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微信支付接口之心酸

发布日期：2022-03-13 05:36:11 浏览次数：16 分类：技术文章

本文共 11046 字，大约阅读时间需要 36 分钟。

微信接口，对于某些人来说，很容易，宝宝自己尝试了一下，瞬间感觉泪奔呀，唉。

首先，统一下单接口：

[HttpPost]        [Route("~/api/WXPay/UnifiedOrder")]        public HttpResponseMessage UnifiedOrder()        {            try            {                NameValueCollection param = Request.Content.ReadAsFormDataAsync().Result;                string body = param["body"].ToString();//简单描述                string out_trade_no = param["out_trade_no"].ToString();                string total_fee = param["total_fee"].ToString();                string spbill_create_ip = param["spbill_create_ip"].ToString();                var stringADict = new Dictionary
     
      ();                stringADict.Add("appid", "这里是公众号ID");                stringADict.Add("mch_id", "商户号");                stringADict.Add("device_info", device_info);                stringADict.Add("nonce_str", CreateNonce_str());                stringADict.Add("body", body);                stringADict.Add("out_trade_no", out_trade_no);                stringADict.Add("total_fee", total_fee);                stringADict.Add("spbill_create_ip", spbill_create_ip);                stringADict.Add("notify_url", "回调函数");                stringADict.Add("trade_type", "APP");                var sign = Sign(stringADict, "签名字符串");//生成签名字符串                var postdata = GeneralPostdata(stringADict, sign);                var url = "https://api.mch.weixin.qq.com/pay/unifiedorder";                var client = new HttpClient();                var result = client.PostAsync(url, new StringContent(postdata)).Result;                if (!result.IsSuccessStatusCode) return null;                dynamic doc = new DynamicXml(result.Content.ReadAsStringAsync().Result);                JObject obj = new JObject();                var a = doc.return_code.Value;                var c = doc.return_msg.Value;                if (doc.return_code.Value == "SUCCESS" && doc.result_code.Value == "SUCCESS")                {                    obj.Add("prepay_id", doc.prepay_id.Value);                    obj.Add("trade_type", doc.trade_type.Value);                    obj.Add("sign", doc.sign.Value);                    obj.Add("nonce_str", doc.nonce_str.Value);                    obj.Add("result_code", doc.result_code.Value);                    obj.Add("return_code", doc.return_code.Value);                    obj.Add("return_msg", doc.return_msg.Value);                    obj.Add("RetCode", 0);                    obj.Add("RetMsg", "");                }                else                {                    obj.Add("RetCode", -1);                    obj.Add("doc", doc.return_code.ToString() + doc.return_msg.ToString());                }                return Request.CreateResponse(obj);            }            catch (Exception e)            {                JObject obj = new JObject();                obj.Add("RetCode", "-1");                obj.Add("ErrorDescription", e.ToString());                obj.Add("RetMsg", "错误代码:" + Guid.NewGuid().ToString());                return Request.CreateResponse(obj);            }        }

　　在这里，必须要说明的是DynamicXml，在这个动态读取XML的时候，可坑死宝宝了。

public class DynamicXml : DynamicObject, IEnumerable    {        private readonly List
     
       _elements;        public DynamicXml(string text)        {            var doc = XDocument.Parse(text);            _elements = new List
      
        { doc.Root };        }        protected DynamicXml(XElement element)        {            _elements = new List
       
         { element };        }        protected DynamicXml(IEnumerable
        
          elements)        {            _elements = new List
         
          (elements);        }        public override bool TryGetMember(GetMemberBinder binder, out object result)        {            result = null;            if (binder.Name == "Value")                result = _elements[0].Value;            else if (binder.Name == "Count")                result = _elements.Count;            else            {                var attr = _elements[0].Attribute(XName.Get(binder.Name));                if (attr != null)                    result = attr;                else                {                    var items = _elements.Descendants(XName.Get(binder.Name));                    if (items == null || items.Count() == 0) return false;                    result = new DynamicXml(items);                }            }            return true;        }              public IEnumerator GetEnumerator()        {            foreach (var element in _elements)                yield return new DynamicXml(element);        }        /// 
           /// /// 
        /// 
                  /// 
                  /// 
                  /// 
                  public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)        {            int ndx = (int)indexes[0];            result = new DynamicXml(_elements[ndx]);            return true;        }        /// 
           /// /// 
        /// 
                  public override string ToString()        {            StringWriter message = new StringWriter();            foreach (var item in _elements)                message.WriteLine("{0}:\t{1}", item.Document,                item.Value);            return message.ToString();        }    }

　　因为刚开始没有加上ToString和TryGetIndex的重写，然后呢，解析了一天，都不知道哪里的错。唉

OK，微信回调接口

[HttpPost]        [Route("~/api/WXPay/Notify")]        public HttpResponseMessage Notify()        {            try            {                byte[] a = Request.Content.ReadAsByteArrayAsync().Result;                string b = Encoding.UTF8.GetString(a);                var sParam = GetRequestPost(b);                if (sParam.Count <= 0)                {                    throw new ArgumentNullException();                }                JObject obj = new JObject();                obj.Add("RetCode", 0);                obj.Add("RetMsg", "");                if (sParam["return_code"] == "SUCCESS" && sParam["result_code"] == "SUCCESS")                {                    var sign = sParam["sign"];                    var signValue = Sign(sParam, "签名字符串");                    bool isVerify = sign == signValue;                    if (isVerify)                    {                        var out_trade_no = sParam["out_trade_no"];                        //具体的后期业务操作                    }                    obj.Add("return_code", "success");                }                else                {                    obj.Add("return_code", "fail");                }                return Request.CreateResponse(HttpStatusCode.OK, obj);            }            catch (ArgumentNullException e)            {                JObject obj = new JObject();                obj.Add("RetCode", "-1");                obj.Add("RequestMsg", "暂无参数！");                return Request.CreateResponse(obj);            }            catch (Exception e)            {                JObject obj = new JObject();                obj.Add("RetCode", "-1");                obj.Add("ErrorDescription", e.ToString());                obj.Add("RetMsg", "错误代码:" + Guid.NewGuid().ToString());                return Request.CreateResponse(obj);            }        }

　　对于这里的GetRequestPost方法，其实就是组合生成一个标准的xml字符串。

private SortedDictionary
     
       GetRequestPost(string xml)        {            SortedDictionary
      
        sArray = new SortedDictionary
       
        ();            dynamic resultXml = new DynamicXml(xml);            sArray.Add("appid", resultXml.appid.Value);            sArray.Add("bank_type", resultXml.bank_type.Value);            sArray.Add("cash_fee", resultXml.cash_fee.Value);            sArray.Add("fee_type", resultXml.fee_type.Value);            sArray.Add("is_subscribe", resultXml.is_subscribe.Value);            sArray.Add("mch_id", resultXml.mch_id.Value);            sArray.Add("nonce_str", resultXml.nonce_str.Value);            sArray.Add("openid", resultXml.openid.Value);            sArray.Add("out_trade_no", resultXml.out_trade_no.Value);            sArray.Add("time_end", resultXml.time_end.Value);            sArray.Add("total_fee", resultXml.total_fee.Value);            sArray.Add("transaction_id", resultXml.transaction_id.Value);            sArray.Add("trade_type", resultXml.trade_type.Value);            sArray.Add("sign", resultXml.sign.Value);            sArray.Add("result_code", resultXml.result_code.Value);            sArray.Add("return_code", resultXml.return_code.Value);            return sArray;        }

　　附，后面的辅助方法，包含签名生成工具等。

public static string GeneralPostdata(IDictionary
     
       postdataDict, string sign)        {            var sb2 = new StringBuilder();            sb2.Append("
      
       ");            foreach (var sA in postdataDict.OrderBy(x => x.Key))            {                sb2.Append("<" + sA.Key + ">")                   .Append(Transfer(sA.Value))                   .Append("
       ");            }            sb2.Append("
       
        ").Append(sign).Append("
       ");            sb2.Append("
      ");            return sb2.ToString();        }        public static string Transfer(string instr)        {            if (instr == null) return "";            return instr.Replace("&", "&").Replace("<", "<")                        .Replace(">", ">").Replace("\"", """);        }        /// 
              /// 生成签名        /// 签名在线验证工具：        /// http://mch.weixin.qq.com/wiki/tools/signverify/        /// 
        /// 
      参与签名生成的参数列表        /// 
      商家私钥        /// 
              public static string Sign(IDictionary
      
        stringADict, string partnerKey)        {            var sb = new StringBuilder();            foreach (var sA in stringADict.OrderBy(x => x.Key))            {                if (string.IsNullOrEmpty(sA.Value)) continue;                if (string.Compare(sA.Key, "sign", true) == 0) continue;                 sb.Append(sA.Key).Append("=").Append(sA.Value).Append("&");            }            var string1 = sb.ToString();            sb.Append("key=").Append(partnerKey);            var stringSignTemp = sb.ToString();            var sign = MD5(stringSignTemp, "UTF-8").ToUpper();            return sign;        }        public static string MD5(string encypStr, string charset = "UTF-8")        {            string retStr;            MD5CryptoServiceProvider m5 = new MD5CryptoServiceProvider();            byte[] inputBye;            byte[] outputBye;            try            {                inputBye = Encoding.GetEncoding(charset).GetBytes(encypStr);            }            catch            {                inputBye = Encoding.GetEncoding("GB2312").GetBytes(encypStr);            }            outputBye = m5.ComputeHash(inputBye);            retStr = System.BitConverter.ToString(outputBye);            retStr = retStr.Replace("-", "").ToUpper();            return retStr;        }

　　OK，只是一个简单的记录，可以直接套用的，当然，对于.net来说，特别注意的就是那个DynamicXML那个类，太尼玛坑爹了，百毒了半天，然后看了半天，终于晓得问题了，唉。不喜勿喷。谢谢

其中，很多包含借鉴网上的东西，如有版权牵扯，请及时联系本人，谢谢。

转载于:https://www.cnblogs.com/JeffController/p/5531494.html

转载地址：https://blog.csdn.net/weixin_30323961/article/details/98220692 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！

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