? ???? ??? ???? WeChat ?? ?? ?? ? ??? ? ???? ???? ??? ?????. (1) ???(???) ?? (2) ???? ?? ?? ??(4) ???? ????? ?????. (5) ?? ???? ????.
1 ???(???) ??

?? WeChat ???? ?? ???? ???? ???? WeChat ??? ?? ???? ???? ???? WeChat ???? XML ???? POST???. ???(???) ??? ???? ??? ?? ?? ?? URL? ??? ? ?? ???? ?????.
1.1 ??? ?? ????
??? ???? ?? ?? WeChat ???? ?? ?? ??? ?? ???? ?? ????? ????. ?? ?? ???? WeChat ??? ?? ???? ????? ???. (??) ???? ?? ???? ?? ?? ???? ?????.
?? ? ?? ???? ?? ??? ?? ??? ????.

1.2 ?? ???
?? ????? ?? ??? ???, ???, ??? ?? ??? ?? ??? ????.

?? ?? ???? ??? ? ?? ??? ??? ? ????. ??? ??? ?? ?? ?????.

1.3 ?? ???
?? ???? ??? ??? ??? ????.

2 ?? ??? ?????. ???
?? ?? ??? ?? ????? ??? ?? ? ?? ?? ?? ? ?? ???? ?? ??? ???? ????.
Utility.CheckSignature ???? ??? ??? ???? ???? ? ?????.
??? ??? ????:

/// <summary>
    /// 驗證消息的有效性
    /// </summary>
    /// <param name="context"></param>
    /// <returns>如果消息有效，返回true；否則返回false。</returns>
    private bool Validate(HttpContext context)
    {
        string username = RequestEx.TryGetQueryString("username");  //在接口配置的URL中加入了username參數(shù)，表示哪個微信公眾號
        AccountInfo account = AccountInfoCollection.GetAccountInfo(username);
        if (account == null)
            return false;
        string token = account.Token;
        string signature = RequestEx.TryGetQueryString("signature");
        string timestamp = RequestEx.TryGetQueryString("timestamp");
        string nonce = RequestEx.TryGetQueryString("nonce");
        if (string.IsNullOrWhiteSpace(signature) || string.IsNullOrWhiteSpace(timestamp) || string.IsNullOrWhiteSpace(nonce))
            return false;
        return xrwang.weixin.PublicAccount.Utility.CheckSignature(signature, token, timestamp, nonce);
    }

驗證消息真實性

??? ?? ??

3 ??? ?? ??

??? ??? ???? ?? ??, XML ??? ??? ???? ?? ??? ??? ?? ???? ?? RequestMessageHelper ???? ???? ? ??? ?????.

RequestMessageHelper helper = new RequestMessageHelper(context.Request);
if(helper.Message != null)
{
    //消息解析成功，對它進(jìn)行處理
}

???? ????? ?? ??? ? helper.Message? ??? ?? ??? RequestBaseMessage? ??? ? ????. MsgType ? Event ???(???) ??? ?? ??? ?? ???? ?????. ?:

RequestBaseMessage bm=helper.Message;
switch(bm.MsgType)
{
    case RequestMessageTypeEnum.text:  //文本消息
        HandleTextMessage((RequestTextMessage)bm);
        break;
    case RequestMessageTypeEnum.image: //圖片消息
        HandleImageMessage((RequestImageMessage)bm);
        break;
    //處理其他消息
    case RequestMessageTypeEnum.event:    //事件
        RequestEventMessage ev=(RequestEventMessage)bm;
        switch(ev.Event)
        {
            case RequestEventTypeEnum.subscribe:    //訂閱
                HandleSubscribeMessage((RequestSubscribeMessage)ev);
                break;
            case RequestEventTypeEnum.unsubscribe:    //取消訂閱
                HandleUnsubscribeMessage((RequestUnsubscribeMessage)ev);
                break;
            //處理其他事件
        }
        break;
    default:
        break;
}

??? ?? ??? ?? ??? ??? ?? ??? ?????: http://git.oschina.net/xrwang2/xrwang.weixin.PublicAccount /blob/master/PublicAccount /RequestMessage/RequestMessageHelper.cs

4 ?? ?? ???
WeChat ???? ???(???)? ??? ? ??( ???) 5? ?? ???? ?????. ?? ? ???? ?? ??? ? 48?? ??? ?? ??? ???? ??? ?? ????.
?? ResponseXxxMessage? ???? ?? ToXml ???? ???? ?? ??? ??? ?????.
?? ?? ???? ?? ??? ????.

/// <summary>
    /// 處理微信的POST請求
    /// </summary>
    /// <param name="context"></param>
    /// <returns>返回xml響應(yīng)</returns>
    private string HandlePost(HttpContext context)
    {
        RequestMessageHelper helper = new RequestMessageHelper(context.Request);
        if (helper.Message != null)
        {
            ResponseBaseMessage responseMessage = HandleRequestMessage(helper.Message);
            return responseMessage.ToXml(helper.EncryptType);
        }
        else
            return string.Empty;
    }

    /// <summary>
    /// 處理請求消息，返回響應(yīng)消息
    /// </summary>
    /// <returns>返回響應(yīng)消息</returns>
    private ResponseBaseMessage HandleRequestMessage(RequestBaseMessage requestMessage)
    {
        ResponseTextMessage response = new ResponseTextMessage(requestMessage.FromUserName, requestMessage.ToUserName, 
            DateTime.Now, string.Format("自動回復(fù)，請求內(nèi)容如下：\r\n{0}", requestMessage));
        return response;
    }

5 ?? ??? ???

??? ???? ?? ?? ??? ?? ??? ??? ???, ?? ??? ???, ??? ??? ??? ?? ??? ??? ? ????. ??? ??? ?? ???? ??? ???????.

? ??? .net WeChat ?? ?? ?? ?? ? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!