错误码表
方便前后台通信错误信息的统一处理，减少维护和沟通成本。例如http的statusCode，看见404 500
很容易就知道具体错误原因。
api 初步设计
interface ErrorStatus {
code: number,
msg: string,
}
function errorCode(code: number, msg: string): ErrorStatus {
return { code, msg };
}
function format(errorCode, ...params): ErrorStatus {
const p = params.slice(0); // clone arr
let { code, msg } = errorCode;
msg = msg.replace(/%s/g, v => p.pop());
return { code, msg };
}
const ErrorCodeMap = {
SERVER_BUSY: errorCode(-1, 'server is busy'),
OK: errorCode(0, 'OK'),
PARAM_ERROR: errorCode(1, 'param not support for %s'),
PERMISSION_DENIED: errorCode(2, 'permission denied'),
}
function extendErrorCodeMap<T, S>(a: T, b: S): T & S {
const result = <T & S>{};
for (let id in a) {
(<any>result)[id] = (<any>a)[id];
}
for (let id in b) {
if (!result.hasOwnProperty(id)) {
(<any>result)[id] = (<any>b)[id];
}
}
return result;
}
测试
format(ErrorCodeMap.PARAM_ERROR,'"user_id" is required');
// {code: 1, msg: "param not support for "user_id" is required"}
扩展之后可以利用ts的提示功能
let newErrorCodeMap = extendErrorCodeMap(ErrorCodeMap, {
DELETE_ERROR: errorCode(3, 'delete error'),
});
利用typescript的提示
image.png
