Question

最近我的node.js服务器因为socket.io错误而崩溃了很多。我怀疑客户端是否发送了无效的utf字符串，这将在utf8.js文件中引发错误。有没有办法避免服务器崩溃？这非常令人沮丧。如果需要的话，我可以修补这个文件。

Error: Lone surrogate U+D83D is not a scalar value
at Error (native)
at checkScalarValue (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/node_modules/utf8/utf8.js:69:10)
at encodeCodePoint (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/node_modules/utf8/utf8.js:90:4)
at Object.utf8encode [as encode] (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/node_modules/utf8/utf8.js:111:18)
at Object.exports.encodePacket (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:74:34)
at encodeOne (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:387:13)
at eachWithIndex (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:256:5)
at map (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:263:5)
at Object.exports.encodePayloadAsBinary (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:411:3)
at Object.exports.encodePayload (/root/node_modules/socket.io/node_modules/engine.io/node_modules/engine.io-parser/lib/index.js:225:20)
at XHR.Polling.send (/root/node_modules/socket.io/node_modules/engine.io/lib/transports/polling.js:238:10)
at Socket.flush (/root/node_modules/socket.io/node_modules/engine.io/lib/socket.js:341:20)
at Socket.sendPacket (/root/node_modules/socket.io/node_modules/engine.io/lib/socket.js:317:10)
at Socket.send.Socket.write (/root/node_modules/socket.io/node_modules/engine.io/lib/socket.js:290:8)
at writeToEngine (/root/node_modules/socket.io/lib/client.js:148:17)
at Client.packet (/root/node_modules/socket.io/lib/client.js:159:7)

Answer 1

可能您尝试以错误的方式发送数据。

您可以尝试在Client / socket.packet周围设置function mutation(arr) { var one = arr[0].toLowerCase(); var two = arr[1].toLowerCase().split(''); var match = true; two.map(function(val){ if(one.indexOf(val) === -1){ match = false; } }); return match; }，或者执行以下操作：

import java.util.*;
import java.io.*;

public class FileLinkList
{
public static void main(String args[])throws IOException{
String content = new String();
int count=1;
File file = new File("abc.txt");
LinkedList<String> list = new LinkedList<String>();

 try {
Scanner sc = new Scanner(new FileInputStream(file));
while (sc.hasNextLine()){
content = sc.nextLine();
list.add(content);
}
sc.close();
}catch(FileNotFoundException fnf){
fnf.printStackTrace();
}
catch (Exception e) {
e.printStackTrace();
System.out.println("\nProgram terminated Safely...");
}

Collections.reverse(list);
Iterator i = list.iterator();
while (i.hasNext()) {
System.out.print("Node " + (count++) + " : ");
System.out.println(i.next());
}
 }
 }

防止服务器死亡。

Socketio：错误：单独的代理U + D83D不是标量值

1 个答案: