feat: add error catch middleware

package.json

@@ -7,7 +7,7 @@
   "private": true,
   "scripts": {
     "start": "node ./build/index.js",
-    "dev": "nodemon --exec ./node_modules/.bin/ts-node -- ./src/index.ts",
+    "dev": "nodemon --ignore doc.json --exec ./node_modules/.bin/ts-node -- ./src/index.ts",
     "build": "tsc",
     "test:run": "./node_modules/.bin/mocha --require espower-typescript/guess 'test/**/*.ts' --timeout=10000",
     "test:coverage": "nyc npm run test:run",

src/index.ts

@@ -10,6 +10,7 @@ import Database from './libraries/Database';
 import Cache from './libraries/Cache';
 import docGenerator from 'routing-controllers-openapi-v3';
 import { IDefaultSuccessResponse } from './interfaces/Helper';
+import errorCatch from './middlewares/errorCatch';
 
 const { port } = config;
 
@@ -19,10 +20,10 @@ useContainerForOrm(Container);
 const app = new Koa();
 
 app.use(logger());
+app.use(errorCatch());
 
 useKoaServer(app, {
   cors: true,
-  routePrefix: '/',
   controllers: [`${__dirname}/controllers/*.{js,ts}`],
   defaultErrorHandler: true
 });

src/middlewares/errorCatch.ts

@@ -0,0 +1,30 @@
+import { ValidationError } from 'class-validator';
+import { Context } from 'koa';
+import { BadRequestError, InternalServerError } from 'routing-controllers';
+
+export default function errorCatch(): (ctx: Context, next: () => Promise<{}>) => Promise<void> {
+  return async (ctx: Context, next: () => Promise<{}>) => {
+    try {
+      await next();
+    } catch (e) {
+      let message;
+      if (Reflect.has(e, 'errors') && e.errors[0] instanceof ValidationError) {
+        message = Object.values(e.errors[0].constraints).join(';');
+        e.status = 400;
+      } else if (e instanceof BadRequestError) {
+        // console.log('『捕获 BadRequestError 』\n', e)
+      } else if (e instanceof InternalServerError) {
+        console.error('『捕获 InternalServerError 』\n', e);
+      } else if (e.httpCode === 401 || e.status === 401) {
+        message = e.message;
+      } else {
+        console.error('『程序异常 o(╥﹏╥)o』\n', e);
+        e.message = '程序异常';
+      }
+      ctx.status = e.httpCode || e.status || 500;
+      ctx.body = {
+        message: message || e.message
+      };
+    }
+  };
+}