我有一个简单的节点socket.io服务器和一个C#UWP应用程序。 我想从应用程序向服务器发送简单的消息,但似乎消息的格式/协议/格式不正确。 我试图让格式正确,但我不知道该怎么做。
app.js
io.on('connection', function(socket){
console.log('CLIENT CONNECTED')
socket.on('message', function (msg) {
console.log('socket msg')
console.log(msg)
}
当我从socket.io tester触发消息时,控制台会显示
socket msg
dwadwadwada
(就像它应该的那样)
调试输出:
engine:socket packet +1ms
socket.io-parser decoded 2["message","dwadwadwada"] as {"type":2,"nsp":"/","data":["message","dwadwadwada"]} +0ms
socket.io:socket got packet {"type":2,"nsp":"/","data":["message","dwadwadwada"]} +0ms
socket.io:socket emitting event ["message","dwadwadwada"] +0ms
socket.io:socket dispatching an event ["message","dwadwadwada"] +0ms
现在,如果我从我的UWP应用程序发送一个字符串(为了简洁,删除了try / catches和异常处理)
string msg = "test";
await sendMessage(msg);
private async Task sendMessage(string message)
{
this.socket = new MessageWebSocket();
socket.Control.MessageType = SocketMessageType.Utf8;
socket.MessageReceived += socketMsgReceived;
await this.socket.ConnectAsync(uri);
Debug.WriteLine("CONNECTED TO " + uri);
DataWriter messageWriter = new DataWriter(socket.OutputStream);
messageWriter.WriteString(message);
await messageWriter.StoreAsync();
}
,邮件被发送(没有错误),服务器似乎得到某些东西,但它不被识别为消息。
engine:ws received "test" +6s
engine:socket packet +1ms
engine:ws closing +1ms
socket.io:client client close with reason parse error +0ms
socket.io:socket closing socket - reason parse error +1ms
我尝试将邮件格式化为
{message = "test"}
甚至42["message","test"]
没有效果,即使后者至少给了我
engine:ws received "42["message" = "test"]" +4s
engine:socket packet +0ms
socket.io-parser decoded 2["message" = "test"] as {"type":4,"data":"parser error"} +0ms
socket.io:client no socket for namespace undefined +1ms
我很确定这是一个简单的修复,但我无法找到如何做到这一点.. 我必须将其转换为特殊类型吗?以某种方式JSONify它? 我不想要任何花哨的东西,只需发送一个
{message: "hi"}
或者(在第一个工作之后)
{message: {text: "hi", additionalStuff: "ho"}}
我很感激任何帮助:) 谢谢!
答案 0 :(得分:0)
我发现了问题是什么......
我真的不得不手工构建websocket字符串,因为(我注意到了)socket.io实际上与websockets不同,只是一个包装器。
所以我必须从头开始使用here中的信息构建一个JSON字符串。
我的最后一个字符串看起来像
"42[\"mess\"," +
"{\"id\": \"" + id + "\", " +
"\"name\": \"" + name + "\"}]";
有很多转义报价...我真的不明白为什么它是 42 而不是“4”,就像文档说的消息一样,但我发现这就是实际发送的内容,所以我只是用它(它有效)
上面的消息由
解析socket.on('mess', function(msg) {
console.log(msg)
}
作为
{id: blah, name: bleh}