/// <summary>
/// 协议错误
/// </summary>
/// <param name="exception"></param>
/// <returns></returns>
private string ProtocolError(WebException exception)
{
try
{
var codes = exception.Message.Split(new[] { '(', ')' }, StringSplitOptions.RemoveEmptyEntries);
if (codes.Length == 3)
{
if (int.TryParse(codes[1], out var s))
{
switch (s)
{
case 404:
Status = ZeroOperatorStatus.NotFind;
return(ToErrorString(ErrorCode.NetworkError, "页面不存在", "页面不存在"));
case 503:
Status = ZeroOperatorStatus.Unavailable;
return(ToErrorString(ErrorCode.NetworkError, "拒绝访问", "页面不存在"));
}
}
}
var msg = ReadResponse(exception.Response);
LogRecorder.Error($"Call {Host}/{ApiName} Error:{msg}");
return(msg); //ToErrorString(ErrorCode.NetworkError, "未知错误", );
}
catch (Exception e)
{
Status = ZeroOperatorStatus.LocalException;
LogRecorder.Exception(e);
return(ToErrorString(ErrorCode.NetworkError, "未知错误", e.Message));
}
finally
{
exception.Response?.Close();
}
}
/// <summary>
/// 取返回值
/// </summary>
/// <returns></returns>
public async Task <string> Call()
{
string jsonResult;
Status = ZeroOperatorStatus.Success;
try
{
var resp = await RemoteRequest.GetResponseAsync();
jsonResult = ReadResponse(resp);
}
catch (WebException e)
{
LogRecorder.Exception(e);
jsonResult = e.Status == WebExceptionStatus.ProtocolError ? ProtocolError(e) : ResponseError(e);
}
catch (Exception e)
{
Status = ZeroOperatorStatus.LocalException;
LogRecorder.Exception(e);
jsonResult = ToErrorString(ErrorCode.LocalException, "未知错误", e.Message);
}
return(string.IsNullOrWhiteSpace(jsonResult) ? ApiResult.RemoteEmptyErrorJson : jsonResult);
}
private string ResponseError(WebException e)
{
e.Response?.Close();
switch (e.Status)
{
case WebExceptionStatus.CacheEntryNotFound:
Status = ZeroOperatorStatus.NotFind;
return(ToErrorString(ErrorCode.NetworkError, "找不到指定的缓存项"));
case WebExceptionStatus.ConnectFailure:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "在传输级别无法联系远程服务点"));
case WebExceptionStatus.ConnectionClosed:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "过早关闭连接"));
case WebExceptionStatus.KeepAliveFailure:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "指定保持活动状态的标头的请求的连接意外关闭"));
case WebExceptionStatus.MessageLengthLimitExceeded:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "已收到一条消息的发送请求时超出指定的限制或从服务器接收响应"));
case WebExceptionStatus.NameResolutionFailure:
Status = ZeroOperatorStatus.NotFind;
return(ToErrorString(ErrorCode.NetworkError, "名称解析程序服务或无法解析主机名"));
case WebExceptionStatus.Pending:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "内部异步请求处于挂起状态"));
case WebExceptionStatus.PipelineFailure:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "该请求是管线请求和连接被关闭之前收到响应"));
case WebExceptionStatus.ProxyNameResolutionFailure:
Status = ZeroOperatorStatus.NotFind;
return(ToErrorString(ErrorCode.NetworkError, "名称解析程序服务无法解析代理服务器主机名"));
case WebExceptionStatus.ReceiveFailure:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "从远程服务器未收到完整的响应"));
case WebExceptionStatus.RequestCanceled:
Status = ZeroOperatorStatus.Unavailable;
return(ToErrorString(ErrorCode.NetworkError, "请求已取消"));
case WebExceptionStatus.RequestProhibitedByCachePolicy:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "缓存策略不允许该请求"));
case WebExceptionStatus.RequestProhibitedByProxy:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "由该代理不允许此请求"));
case WebExceptionStatus.SecureChannelFailure:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "使用 SSL 建立连接时出错"));
case WebExceptionStatus.SendFailure:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "无法与远程服务器发送一个完整的请求"));
case WebExceptionStatus.ServerProtocolViolation:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "服务器响应不是有效的 HTTP 响应"));
case WebExceptionStatus.Timeout:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "请求的超时期限内未不收到任何响应"));
case WebExceptionStatus.TrustFailure:
Status = ZeroOperatorStatus.NetWorkError;
return(ToErrorString(ErrorCode.NetworkError, "无法验证服务器证书"));
default:
Status = ZeroOperatorStatus.RemoteError;
return(ToErrorString(ErrorCode.NetworkError, "内部服务器异常(未知错误)"));
}
}
