Groovy JsonBuilder 将 \u0000's 附加到字符串

Question

我正在尝试为我正在制作的Unity3D游戏制作一个简单的UDP套接字服务器，并且我已经让它大部分工作。我可以向它发送信息并阅读这些信息。但是当我试图将消息发送回客户端(用于测试目的，目前)时，我得到一个BufferOverFlowException。

在发送数据返回之前，我使用groovy.json.JsonBuilder将其转换为json。数据有一个非常简单的结构:

[data: "Hello World"]

但是不管什么原因，JsonBuilder把它构建为

{ "data": "Hello Worldu0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000u0000..." }

u0000持续了一段时间。长到足以使我的1024字节长的ByteBuffer溢出。

这是负责将数据发送回客户端的类:

import groovy.json.JsonBuilder
import groovy.transform.CompileStatic
import groovyx.gpars.actor.DynamicDispatchActor
import java.nio.ByteBuffer
import java.nio.channels.DatagramChannel
@CompileStatic
class SenderActor extends DynamicDispatchActor{
    //takes message of type [data: Object, receiver: SocketAddress]
    void onMessage(Map message){
        println(message.data) //prints "Hello World"
        def json = new JsonBuilder([data: message.data]).toString()
        println("Sending: $json") //prints '{"data": "Hello Worldu0000u0000..."}'
        def channel = DatagramChannel.open()
        channel.connect(message.receiver as SocketAddress)
        def buffer = ByteBuffer.allocate(1024)
        buffer.clear()
        buffer.put(json.getBytes())
        buffer.flip()
        channel.send(buffer, message.receiver as SocketAddress)
    }
}

这是我得到的堆栈跟踪:

An exception occurred in the Actor thread Actor Thread 2
java.nio.BufferOverflowException
    at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:189)
    at java.nio.ByteBuffer.put(ByteBuffer.java:859)
    at Croquet.Actors.SenderActor.onMessage(SenderActor.groovy:28)
    at Croquet.Actors.SenderActor$onMessage.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
    at Croquet.Actors.ProcessorActor$onMessage.call(Unknown Source)
    at groovyx.gpars.actor.impl.DDAClosure$_createDDAClosure_closure1.doCall(DDAClosure.groovy:38)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:292)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1016)
    at groovy.lang.Closure.call(Closure.java:423)
    at groovy.lang.Closure.call(Closure.java:439)
    at groovyx.gpars.actor.AbstractLoopingActor.runEnhancedWithoutRepliesOnMessages(AbstractLoopingActor.java:293)
    at groovyx.gpars.actor.AbstractLoopingActor.access$400(AbstractLoopingActor.java:30)
    at groovyx.gpars.actor.AbstractLoopingActor$1.handleMessage(AbstractLoopingActor.java:93)
    at groovyx.gpars.util.AsyncMessagingCore.run(AsyncMessagingCore.java:132)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

所讨论的数据被编码为UTF-8，如果有帮助的话。

这是负责向服务器发送数据的客户端代码(用c#编写):

void sendTestMessage(UdpClient udpClient, UdpState udpState){
        byte[] data = Encoding.UTF8.GetBytes("Hello World");
        udpClient.BeginSend(
            data, 
            data.Length, 
            udpState.e, //IPEndPoint
            result =>{
                messageSent = true;
                Debug.Log(string.Format("Message '{1}' Sent to {0}", udpState.e, Encoding.UTF8.GetString(data)));
                udpClient.EndSend(result);
            }, 
            udpState);
    }

Answer 1

我通过更改

解决了这个问题

def json = new JsonBuilder([data: message.data]).toString()

def json = new JsonBuilder([data: message.data]).toString().replace("\u0000", "")