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@vafast/request-id

v0.1.2

Published

Request ID middleware plugin for Vafast framework

Downloads

169

Readme

@vafast/request-id

为每个请求生成唯一 ID:写入 req.id、经 next({ requestId }) 注入 handler,并回写响应头(默认 X-Request-Id)。

安装

npm install @vafast/request-id

快速开始

import { Server, defineRoute, defineRoutes, serve } from 'vafast'
import { requestId, getRequestId } from '@vafast/request-id'

const routes = defineRoutes([
  defineRoute({
    method: 'GET',
    path: '/',
    handler: ({ requestId: id, req }) => ({
      fromContext: id,
      fromReq: req.id,
      viaHelper: getRequestId(req),
    }),
  }),
])

const server = new Server(routes)
server.use(requestId())
serve({ fetch: server.fetch, port: 3000 })

响应头示例:

X-Request-Id: 550e8400-e29b-41d4-a716-446655440000

用法

自定义配置

server.use(
  requestId({
    generator: () => `req-${Date.now()}`,
    headerName: 'X-Correlation-Id',
    useExisting: true,
    existingHeaderName: 'X-Trace-Id',
  }),
)

与 request-logger

import { requestId } from '@vafast/request-id'
import { requestLogger } from '@vafast/request-logger'

server.use(requestId())
server.use(
  requestLogger({
    url: process.env.LOG_INGEST_URL!,
    service: 'my-server',
  }),
)

API 完整参数

requestId(options?)

| 参数 | 类型 | 默认 | 说明 | |------|------|------|------| | generator | () => string | crypto.randomUUID() | ID 生成器 | | headerName | string | 'X-Request-Id' | 响应头名称 | | useExisting | boolean | true | 复用入站请求头中的 ID | | existingHeaderName | string | 同 headerName | 读取已有 ID 的请求头 |

行为:解析/生成 ID → req.id = idnext({ requestId: id }) → 写入响应头。

getRequestId(req)

getRequestId(req: Request): string | undefined

最佳实践

  • request-logger 等依赖追踪 ID 的中间件之前挂载
  • 微服务保持同一头名与 useExisting: true,贯通链路
  • 业务日志自行带上 requestId@vafast/logger 不会自动注入)

注意事项

  • 会新建 Response 以设置响应头
  • 入站 ID 不做格式校验;网关侧应负责清洗
  • 本包只负责请求 ID,不是应用日志库

相关链接

License

MIT