/// <summary>
/// 调用。
/// </summary>
/// <param name="context">处理上下文。</param>
/// <returns>任务。</returns>
public override Task Invoke(IHandlerContext context)
{
var dependencyResolver = context.GetDependencyResolver();
var requestMessageFactory = dependencyResolver.GetService <IRequestMessageFactory>();
var content = context.Content;
var parameters = context.GetRequestParameters();
if (parameters.ContainsKey("encrypt_type"))
{
var nonce = parameters["nonce"];
var signature = parameters["msg_signature"];
var timestamp = parameters["timestamp"];
var baseInfo = context.GetMessageHandlerBaseInfo();
var appId = baseInfo.AppId;
var encodingAesKey = baseInfo.EncodingAesKey;
var token = baseInfo.Token;
var wxBizMsgCrypt = new WXBizMsgCrypt(token, encodingAesKey, appId);
wxBizMsgCrypt.DecryptMsg(signature, timestamp, nonce, content, ref content);
}
context.SetRequestMessage(requestMessageFactory.CreateRequestMessage(content));
return(Next.Invoke(context));
}
/// <summary>
/// 调用。
/// </summary>
/// <param name="context">处理上下文。</param>
/// <returns>任务。</returns>
public override Task Invoke(IHandlerContext context)
{
var responseMessage = context.GetResponseMessage();
if (responseMessage == null)
{
context.ResponseXml = string.Empty;
}
else
{
var requestMessage = context.GetRequestMessage();
//基本信息初始化。
responseMessage.CreateTime = DateTime.Now;
responseMessage.FromUserName = requestMessage.ToUserName;
responseMessage.ToUserName = requestMessage.FromUserName;
var dependencyResolver = context.GetDependencyResolver();
var responseMessageFactory = dependencyResolver.GetService <IResponseMessageFactory>();
var content = responseMessageFactory.GetXmlByReponseMessage(responseMessage);
#region Encrypt
if (!string.IsNullOrWhiteSpace(content))
{
var parameters = context.GetRequestParameters();
var encryptType = parameters["encrypt_type"];
if (encryptType != null)
{
var nonce = parameters["nonce"];
var timestamp = parameters["timestamp"];
var baseInfo = context.GetMessageHandlerBaseInfo();
var appId = baseInfo.AppId;
var encodingAesKey = baseInfo.EncodingAesKey;
var token = baseInfo.Token;
var wxBizMsgCrypt = new WXBizMsgCrypt(token, encodingAesKey, appId);
wxBizMsgCrypt.EncryptMsg(content, timestamp, nonce, ref content);
}
}
#endregion Encrypt
context.ResponseXml = content;
}
return(Next.Invoke(context));
}
/// <summary>
/// 调用。
/// </summary>
/// <param name="context">处理上下文。</param>
/// <returns>任务。</returns>
public override Task Invoke(IHandlerContext context)
{
//HTTP正文。
var bytes = Encoding.UTF8.GetBytes(context.Content);
//根据查询字符串变量集合得到一个参数字典表。
var parameters = context.GetRequestParameters();
//得到最终的请求Url。
var postUrl = AppendParameter(_agentRequestModel.Uri.ToString(), parameters);
Func <Task <string> > getPostTask =
() =>
{
var task = Task.Factory.StartNew(() => Encoding.UTF8.GetString(HttpHelper.Post(postUrl, bytes)));
//防止出错时程序崩溃。
task.ContinueWith(t => { }, TaskContinuationOptions.OnlyOnFaulted);
return(task);
};
string content = null;
Exception exception = null;
//开始请求。
for (var i = 0; i < _agentRequestModel.RetryCount + 1 /*重试次数加上一次必需请求的次数*/; i++)
{
var task = getPostTask();
var isTimeout = !task.Wait(_agentRequestModel.Timeout);
exception = task.Exception;
//超时或者失败则进行尝试。
if (isTimeout || task.IsFaulted)
{
continue;
}
content = task.Result;
//结束请求。
break;
}
if (content == null)
{
throw new Exception("代理请求次数超过了重试次数并且目标方还是没有正确响应" + (exception == null ? "。" : "错误消息：" + exception.Message));
}
context.ResponseXml = content;
return(Next.Invoke(context));
}
/// <summary>
/// 调用。
/// </summary>
/// <param name="context">处理上下文。</param>
/// <returns>任务。</returns>
public override Task Invoke(IHandlerContext context)
{
var parameters = context.GetRequestParameters();
var signature = parameters["signature"];
var timestamp = parameters["timestamp"];
var nonce = parameters["nonce"];
var token = context.GetMessageHandlerBaseInfo().Token;
var dependencyResolver = context.GetDependencyResolver();
var signatureService = dependencyResolver.GetService <ISignatureService>();
if (!signatureService.Check(signature, timestamp, nonce, token))
{
throw new Exception("非法请求。");
}
return(Next.Invoke(context));
}
