event.node.req.headers

export default defineEventHandler(async (event) => {
const headers = event.node.req.headers
// 获取特定请求头
const userAgent = headers['user-agent']
const authorization = headers['authorization']
})

getHeader 和 getHeaders

export default defineEventHandler(async (event) => {
  // 获取单个请求头
  const userAgent = getHeader(event, 'user-agent')
  const authToken = getHeader(event, 'authorization')
  
  // 获取所有请求头
  const allHeaders = getHeaders(event)
})

getRequestHeader 和 useRequestHeaders

export default defineEventHandler(async (event) => {
  // 获取单个请求头
  const authHeader  = getRequestHeader(event,"Authorization")

  // 获取所有请求头
  const allHeaders = useRequestHeaders(event)
})

和 getHeader 的区别

实际上 getRequestHeader 和 getHeader 没有任何区别，因为 getHeader 就是 getRequestHeader的别名，它们的定义如下：

declare function getRequestHeader(event: H3Event, name: HTTPHeaderName): RequestHeaders[string];

declare const getHeader: typeof getRequestHeader;

类似的，getHeaders 也是 useRequestHeaders 的别名