企业微信接口问题

背景：

有两个微信企业号，一个是生产的微信企业号（未升级成企业微信），一个是测试企业号（已经升级到企业微信）

在调用生产环境下的微信企业号的推送消息的接口时遇到以下问题：

{"errcode":40033,"errmsg":"invalid charset. please check your request, if include \\uxxxx will create fail!"}

根据上述，我们可以得知是由于含有特殊字符  \uxxxx

但是在测试环境中的企业号却可以发送同样的字符。

同样调用一模一样的代码去推送消息，如下：

public static string SendMsgTest(string user, string msg)
    {
        try
        {
            var item = new { touser = user, toparty = "", totag = "", msgtype = "text", agentid = 0, text = new { content = msg }, safe = "0" };
            var body = DataToJson(item);
            WX_Api api = new  WX_Api(false);
            string url = "https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=" + GetWeiQyToKenTest();
            return api.InfoPost(url, body);
        }
        catch (Exception e)
        {
            return e.Message;
        }
    }

好吧，那就找推送日志：

{"touser":"C02","toparty":"","totag":"","msgtype":"text","agentid":0,"text":{"content":"测试消息,来自Perwen的补货订单审核确认：[单据号：RP1706301118_50]   http://xxxx.com.cn/w/ReplenishmentOrder/Checking.aspx?code=RP1706301118_50u0026id=106u0026t=999u0026a=2222u0026v=ooooo"},"safe":"0"}


{"touser":"C02","toparty":"","totag":"","msgtype":"text","agentid":0,"text":{"content":"测试消息,来自Perwen的补货订单审核确认：[单据号：RP1706301118_50]   http://xxxx.com.cn/w/ReplenishmentOrder/Checking.aspx?code=RP1706301118_50u0026id=106u0026t=999u0026a=2222u0026v=ooooo"},"safe":"0"}

于是就是懵了。。。。

好吧，既然明面上不知道什么原因。但是有40033错误提示，那么就排除收干扰的因素。在生产的企业号替换掉含有特殊字符  \uxxxx  的。然后就可以了。。。。。。。。。。。

 public static string SendMsg(string user,string msg)
    {
        try
        {          
            var item = new { touser = user, toparty = "", totag = "", msgtype = "text", agentid = Agentid, text = new { content = msg }, safe = "0" };
            var body = DataToJson(item);
            string Strbody = body;
            JavaScriptSerializer js = new JavaScriptSerializer();
            body = js.Serialize(Strbody).Replace("\u0026", "&");
            body = body.Replace("\", "");
            body = body.TrimStart('"').TrimEnd('"');
            WXApi api = new WXApi(false);
            string url = "https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=" + Access_Token.Access_Token;
            WriteLog("url---" + url);
            WriteLog("  body---" + body);
            return api.InfoPost(url, body);
        }
        catch (Exception e)
        {
            return e.Message;
        }
    }

结论：个人猜测是企业号跟企业微信的机制有一点点不一样。（PS：园友如有真相，还望告知）