exception.dart
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import 'package:dio/dio.dart';
import 'api_response/api_response_entity.dart';
class ApiException implements Exception {
static const unknownException = "未知错误";
final String? message;
final int? code;
String? stackInfo;
ApiException([this.code, this.message]);
factory ApiException.fromDioError(DioException error) {
switch (error.type) {
case DioExceptionType.connectionTimeout:
return BadRequestException(-1, "连接超时");
case DioExceptionType.sendTimeout:
return BadRequestException(-1, "请求超时");
case DioExceptionType.receiveTimeout:
return BadRequestException(-1, "响应超时");
case DioExceptionType.badCertificate:
return BadRequestException(-1, "证书错误");
case DioExceptionType.badResponse:
return BadRequestException(-1, "返回错误");
case DioExceptionType.cancel:
return BadRequestException(-1, "请求取消");
case DioExceptionType.connectionError:
return BadRequestException(-1, "连接错误");
case DioExceptionType.unknown:
try {
/// http错误码带业务错误信息
ApiResponse apiResponse = ApiResponse.fromJson(error.response?.data);
if (apiResponse.code != null) {
return ApiException(apiResponse.code, apiResponse.msg);
}
int? errCode = error.response?.statusCode;
switch (errCode) {
case 400:
return BadRequestException(errCode, "请求语法错误");
case 401:
return UnauthorisedException(errCode!, "没有权限");
case 403:
return UnauthorisedException(errCode!, "服务器拒绝执行");
case 404:
return UnauthorisedException(errCode!, "无法连接服务器");
case 405:
return UnauthorisedException(errCode!, "请求方法被禁止");
case 500:
return UnauthorisedException(errCode!, "服务器内部错误");
case 502:
return UnauthorisedException(errCode!, "无效的请求");
case 503:
return UnauthorisedException(errCode!, "服务器异常");
case 505:
return UnauthorisedException(errCode!, "不支持HTTP协议请求");
default:
return ApiException(errCode, error.response?.statusMessage ?? '未知错误');
}
} on Exception catch (e) {
return ApiException(-1, unknownException);
}
default:
return ApiException(-1, error.message);
}
}
factory ApiException.from(dynamic exception) {
if (exception is DioException) {
return ApiException.fromDioError(exception);
}
if (exception is ApiException) {
return exception;
} else {
var apiException = ApiException(-1, unknownException);
apiException.stackInfo = exception?.toString();
return apiException;
}
}
}
/// 请求错误
class BadRequestException extends ApiException {
BadRequestException([int? code, String? message]) : super(code, message);
}
/// 未认证异常
class UnauthorisedException extends ApiException {
UnauthorisedException([int code = -1, String message = '']) : super(code, message);
}