难以解析responseText

Question

我和你玩得很开心

• Redis
• Webdis
• Dart

这是我写的

#import('dart:html');
#import('dart:json');

class ChatClient {
  XMLHttpRequest listener;
  int parsePosition = 0;

  void connect(){
    this.listener = new XMLHttpRequest();
    this.listener.open("GET", "http://i.target.co.uk:9005/subscribe/test.json", true);
    this.listener.setRequestHeader('Accept', 'application/json');
    this.listener.on.readyStateChange.add(handleData);
    this.listener.send();
  }

  void handleData(Event event){
    print(this.listener.responseText);
    /*
    if (this.listener.responseText != ""){
      Map data = JSON.parse(this.listener.responseText);
      print(data["subscribe"]);
    }
    */
  }
}

void main(){
  ChatClient client = new ChatClient();
  client.connect();
  document.query('#status').innerHTML = 'Loaded!';
}

问题是，每次我发布某件东西时，responseText的大小都会像这样

{"subscribe":["subscribe","test",1]}
{"subscribe":["subscribe","test",1]}{"subscribe":["message","test","e"]}
{"subscribe":["subscribe","test",1]}{"subscribe":["message","test","e"]}{"subscribe":["message","test","e"]}

现在你不能解析

{"subscribe":["subscribe","test",1]}{"subscribe":["message","test","e"]}{"subscribe":["message","test","e"]}

那我该怎么办？你能清除responseText吗？冲洗缓冲器？某物?

编辑:我知道您可以迭代整个字符串或跟踪每个json对象的长度，但是难道没有更干净的方法吗？

编辑:使用新的打印语句

readyStat: 2 status: 200
{"subscribe":["subscribe","test",1]}
readyStat: 3 status: 200
{"subscribe":["subscribe","test",1]}{"subscribe":["message","test","e"]}
readyStat: 3 status: 200

Answer 1

使用了最终解决方案。

  void connect(){
    this.listener = new XMLHttpRequest();
    this.listener.open("GET", "http://i.h.co.uk:9005/subscribe/test", true);
    this.listener.setRequestHeader('Accept', 'application/json');
    this.listener.on.readyStateChange.add(handleData);
    this.listener.send(); 
  }

  void handleData(Event event){
    try {
      Map data = JSON.parse(this.listener.responseText.substring(this.parsePosition));
      this.parsePosition = this.listener.response.length;
      var message = data['subscribe'][2];
      print("Recieved> $message");
    } catch (final e){
    }
  }