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import {  ServerRequest,  Response,  Status,  posix,  serve,  assert,} from "./deps.ts";import serveFile from "./serve-file.ts";import serveFallback from "./serve-fallback.ts";import setCORS from "./set-cors.ts";
export class FileServer {  readonly #param: Param;  #stop: boolean = false;
  constructor(param: Param) {    this.#param = param;  }
  public async start() {    this.#stop = false;    const server = serve({      port: this.#param.port,      hostname: this.#param.hostname,    });
    for await (const req of server) {      if (this.#stop) break;
      let normalizedUrl = posix.normalize(req.url);      try {        normalizedUrl = decodeURIComponent(normalizedUrl);      } catch (e) {        if (!(e instanceof URIError)) {          throw e;        }      }
      const fsPath = posix.join(this.#param.target, normalizedUrl);
      let response: Response | undefined;      try {        const info = await Deno.stat(fsPath);        if (info.isDirectory) {          response = {            status: Status.Forbidden,            body: "Cannot serve directory",          };        } else {          response = await serveFile(fsPath);        }      } catch (error) {        this.#param.onError?.(error);        response = await serveFallback(error);      } finally {        if (this.#param.cors) {          assert(response);          setCORS(response);        }        this.#param.onServe?.(req, response!);        req.respond(response!);      }    }  }
  public stop() {    this.#stop = true;  }}
export interface Param {  readonly onError?: (error: any) => void;  readonly onServe?: (request: ServerRequest, response: Response) => void;  readonly port: number;  readonly hostname?: string;  readonly target: string;  readonly cors: boolean;}
export default FileServer;