设置响应头
ctx.set('Acsess-Control-Allow-Origin','*')
ctx.set('Acsess-Control-Allow-Methods','OPTIONS,GET,PUT,POST,DELETE')
完整代码：
module.exports = async (ctx, next) => {
const contentType = 'application/json;charset=utf-8'
ctx.set('Content-Type', contentType)
ctx.set('Acsess-Control-Allow-Origin','*')
ctx.set('Acsess-Control-Allow-Methods','OPTIONS,GET,PUT,POST,DELETE')
await next()
}
