DART服务器将FUTURE函数输出发送回客户端,怎么样?

时间:2014-08-20 16:48:10

标签: dart dart-async

在上一个问题here中,服务器端dart文件正在调用FUTURE电子邮件函数,该函数返回确认消息或错误。以下功能适用于" print"功能,但对于" res.write"没有用。

server.dart文件:

void handlePost(HttpRequest req) {
  HttpResponse res = req.response;
  print('${req.method}: ${req.uri.path}');
  addCorsHeaders(res);

  req.listen((List<int> buffer) {
    SendConfirmationNote2Client(String msg) {
      print('msg: $msg');     // this is working
      res.write(msg);         // this looks to be wrong!
      res.close();
    }
    email()
    .then(SendConfirmationNote2Client);
  }, onError: printError);
}

client.dart文件是:

void submitFprm(){   
  request = new HttpRequest();
  request.onReadyStateChange.listen(onData); 
  var url = 'http://127.0.0.1:4040/'; 
  request.open('POST', url);
  request.send(JSON.encode(theData));
}  

void onData(_) {
  if (request.readyState == HttpRequest.DONE && request.status == 200) {                               
    print('request.responseText');   // this is not printing anything!!
    server_output.innerHtml=request.responseText;  // this working  
  } else if (request.readyState == HttpRequest.DONE &&
    request.status == 0) {         
    print('no server');
  }
}

任何帮助!

1 个答案:

答案 0 :(得分:2)

我不知道它是否是正确的错误,但你有

print('request.responseText');

但是这会打印文字request.responseText。应该是

print(request.responseText);

我也会尝试运行Fiddler来查看从服务器返回的确切响应;为了判断问题是否与服务器或客户端代码有关。