Exception(异常)
当发生致命错误(如认证失败)时,必须抛出 HTTPException。
throw HTTPException
下面的例子展示了如何在中间件中抛出 HTTPException
:
import { HTTPException } from 'hono/http-exception'
// ...
app.post('/auth', async (c, next) => {
// 执行认证
if (authorized === false) {
throw new HTTPException(401, { message: 'Custom error message' })
}
await next()
})
你也可以自定义返回给用户的 Response:
import { HTTPException } from 'hono/http-exception'
const errorResponse = new Response('Unauthorized', {
status: 401,
headers: {
Authenticate: 'error="invalid_token"',
},
})
throw new HTTPException(401, { res: errorResponse })
Handling HTTPException
你可以通过 app.onError
处理抛出的 HTTPException
:
import { HTTPException } from 'hono/http-exception'
// ...
app.onError((err, c) => {
if (err instanceof HTTPException) {
// 获取自定义的 Response
return err.getResponse()
}
// ...
})
cause
cause
选项允许添加 cause 数据,用于错误链路追踪:
app.post('/auth', async (c, next) => {
try {
authorize(c)
} catch (e) {
throw new HTTPException(401, { message, cause: e })
}
await next()
})