Function servePublicMiddleware

packages/vite/src/node/server/middlewares/static.ts:80–122

(
  server: ViteDevServer,
  publicFiles?: Set<string>,
)

}

export function servePublicMiddleware(
  server: ViteDevServer,
  publicFiles?: Set<string>,
): Connect.NextHandleFunction {
  const dir = server.config.publicDir
  const serve = sirv(
    dir,
    sirvOptions({
      config: server.config,
      getHeaders: () => server.config.server.headers,
      disableFsServeCheck: true,
    }),
  )

  const toFilePath = (url: string) => {
    let filePath = cleanUrl(url)
    if (filePath.includes('%')) {
      try {
        filePath = decodeURI(filePath)
      } catch {
        /* malform uri */
      }
    }
    return normalizePath(filePath)
  }

  // Keep the named function. The name is visible in debug logs via `DEBUG=connect:dispatcher ...`
  return function viteServePublicMiddleware(req, res, next) {
    // To avoid the performance impact of `existsSync` on every request, we check against an
    // in-memory set of known public files. This set is updated on restarts.
    // also skip import request and internal requests `/@fs/ /@vite-client` etc...
    if (
      (publicFiles && !publicFiles.has(toFilePath(req.url!))) ||
      isImportRequest(req.url!) ||
      isInternalRequest(req.url!) ||
      // for `/public-file.js?url` to be transformed
      urlRE.test(req.url!)
    ) {
      return next()
    }
    serve(req, res, next)
  }
}

export function serveStaticMiddleware(
  server: ViteDevServer,