小编ano*_*ous的帖子

我经常在Dart中收到错误"HTTP标头不可变".

我想要做的是当用户在"packages"文件夹中询问某些内容时,它会获取它.

我的错误代码是这样的:

if(new RegExp("/packages/(.*)").hasMatch(request.uri.toString())){
    new File(request.uri.toString().substring(1)).readAsString().then((String contents){
      request.response.headers.contentType = new ContentType("text", "css", charset: "utf-8");
      request.response.write(contents);
      request.response.close();
    });
  }

我的整个代码是这样的:

import "dart:io";

void main() {
  HttpServer.bind(InternetAddress.LOOPBACK_IP_V4, 8000).then((HttpServer server){
    print("Listening on localhost on {$server.port}");

    server.listen((HttpRequest request){
      switch(request.uri.toString()){
        case "/":
          request.response.headers.contentType = ContentType.HTML;

          new File("static/taskbar.html").readAsString().then((String contents){
            request.response.write(contents);
            request.response.close();

            new File("static/index.html").readAsString().then((String contents){
              request.response.write(contents);
              request.response.close();
            });
          });
          break;
        default:
          request.response.statusCode = HttpStatus.NOT_FOUND;
          request.response.write("404 Not Found.");
          request.response.close();
          break;
      }

      if(new RegExp("/packages/(.*)").hasMatch(request.uri.toString())){
        new File(request.uri.toString().substring(1)).readAsString().then((String contents){
          request.response.headers.contentType = new ContentType("text", "css", charset: "utf-8");
          request.response.write(contents);
          request.response.close();
        });
      } …