修改跨域

webServer/src/server.ts

@@ -10,7 +10,18 @@ import {
 const app = new Koa()
 
 app.context.redis = koaRedis(redisConfig);
-
+app.use(async (ctx, next) => {
+    ctx.set('Access-Control-Allow-Origin', '*')
+    ctx.set('Access-Control-Allow-Headers', 'content-type')
+    ctx.set('Access-Control-Allow-Methods', 'OPTIONS,GET,PUT,POST,DELETE')
+    await next()
+    // 允许所有跨域
+    if (ctx.request.method === 'OPTIONS') {
+      console.log('跨域请求')
+      ctx.response.status = 200
+      ctx.response.message = 'OK'
+    }
+  })
 app.use(bodyParser());//中间件
 app.use(router.routes()); //路由
 //监听端口