public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext context)
{
var modelState = context.ModelState;
if (modelState.IsValid)
{
base.OnActionExecuting(context);
}
else
{
// build a json string
int i = 0;
StringBuilder sbErrors = new StringBuilder("{");
foreach (KeyValuePair<string, ModelState> keyValue in modelState)
{
string fieldName = keyValue.Key;
string[] values = keyValue.Value.Errors.Select(e => e.ErrorMessage).ToArray<string>();
if (values.Length == 0 || String.IsNullOrWhiteSpace(values[0]))
{
continue;
}
int postion = fieldName.IndexOf(".");
if (postion > -1)
{
fieldName = fieldName.Substring(postion + 1, fieldName.Length - postion - 1);
}
// key is property name and value is the error message,
// e.g:{"key1":"[\"v1\",\"v2\"]","key2":"[\"v1\",\"v2\"]"}
if (i > 0) sbErrors.Append(",");
sbErrors.Append("\"");
sbErrors.Append(fieldName);
sbErrors.Append("\":");
sbErrors.Append("[");
if (values != null && values.Length > 0)
{
for (int j = 0; j < values.Length; j++)
{
if (j > 0) sbErrors.Append(",");
sbErrors.Append("\"").Append(values[j]).Append("\"");
}
}
sbErrors.Append("]");
i++;
}
sbErrors.Append("}");
string message = "invalid request data.";
context.Response = new HttpResponseMessage(HttpStatusCode.BadRequest);
var error = new WSErrorResponse(HttpStatusCode.BadRequest, Errors.data_validation_error_400,message, sbErrors.ToString());
context.Response = HttpResponseHelper.BuildErrorResponse(error);
}
}
public static HttpResponseMessage BuildErrorResponse(WSErrorResponse response)
{
var responseMessage = new HttpResponseMessage(ConvertToStatusCode(response.Status));
responseMessage.Content = new ObjectContent(typeof(WSErrorResponse), response, new JsonMediaTypeFormatter());
responseMessage.Headers.Add(ResponseHeaderConstants.X_Error_Message, RemoveInvalidNewLine(response.Message));
return responseMessage;
}
public static Task<HttpResponseMessage> SendAsync(WSErrorResponse response)
{
return Task<HttpResponseMessage>.Factory.StartNew(() =>
{
var responseMessage = new HttpResponseMessage(ConvertToStatusCode(response.Status));
responseMessage.Content = new ObjectContent(typeof(WSErrorResponse), response, new JsonMediaTypeFormatter());
responseMessage.Headers.Add(ResponseHeaderConstants.X_Error_Message, RemoveInvalidNewLine(response.Message));
return responseMessage;
});
}
private WSErrorResponse UnAuthenticationResponse()
{
WSErrorResponse unauth = new WSErrorResponse
{
Code = Errors.invalid_token_401,
Message = "未经授权的访问!",
Status = 401
};
return unauth;
}
public override void OnException(HttpActionExecutedContext context)
{
WSErrorResponse error = new WSErrorResponse
{
Message = context.Exception == null? null : context.Exception.Message,
More = context.Exception == null? null : context.Exception.ToString()
};
if (context.Exception is BadRequestException)
{
error.Status = (int)HttpStatusCode.BadRequest;
if (String.IsNullOrWhiteSpace(error.Code))
{
error.Code = Errors.bad_request_400;
}
}
else if (context.Exception is DuplicateObjectException)
{
error.Status = (int)HttpStatusCode.BadRequest;
if (String.IsNullOrWhiteSpace(error.Code))
{
error.Code = Errors.record_has_existed_400;
}
}
else if (context.Exception is UnauthorizedException)
{
error.Status = (int)HttpStatusCode.Unauthorized;
if (String.IsNullOrWhiteSpace(error.Code))
{
error.Code = Errors.unauthorized_401;
}
}
else if (context.Exception is ForbiddenException)
{
error.Status = (int)HttpStatusCode.Forbidden;
if (String.IsNullOrWhiteSpace(error.Code))
{
error.Code = Errors.forbidden_403;
}
}
else if (context.Exception is NotFoundException)
{
error.Status = (int)HttpStatusCode.NotFound;
{
error.Code = Errors.not_found_404;
}
}
else if (context.Exception is MobileException)
{
error.Status = (int)HttpStatusCode.InternalServerError;
/*
* This is a temporary solution.
* There is a kind of error, says EMSE Script error, which does not impact the process.
* The JSON response should indicate it via the code field.
//*/
var exception = context.Exception as MobileException;
if (exception != null)
{
error.Code = exception.ErrorCode;
}
if (String.IsNullOrWhiteSpace(error.Code))
{
error.Code = Errors.internal_server_error_500;
}
}
else
{
error.Status = (int)HttpStatusCode.InternalServerError;
error.Code = Errors.internal_server_error_500;
}
context.Response = HttpResponseHelper.BuildErrorResponse(error);
}
