[英]Socketio - flask server and c# client
嗨,我正在嘗試使用SocketIO創建消息傳遞應用程序。 我有一個用Flask寫的服務器和一個用C#寫的客戶端。 我正在為客戶端使用SocketIoClientDotNet
( https://github.com/Quobject/SocketIoClientDotNet )。
這是我的代碼:
燒瓶:routes.py
from flask import Flask
from flask.ext.socketio import SocketIO, emit
app = Flask(__name__)
app.config['SECRET_KEY'] = 'secret!'
socketio = SocketIO(app)
@app.route('/')
def home():
return "hello"
@socketio.on('connect')
def connect():
print("CONNECTED")
@socketio.on("message")
def test():
print("TEST WORKS")
if __name__ == '__main__':
socketio.run(app)
C# :
public static class EnvConnections {
public static IO.Options CreateOptions() {
var options = new IO.Options();
options.Port = 5000;
options.Hostname = "127.0.0.1";
options.ForceNew = true;
return options;
}
public static void Connect() {
Uri uri = new Uri("http://127.0.0.1:5000");
var socket = IO.Socket(uri, CreateOptions()); //also tried to create the socket only with url IO.Socket("http://127.0.0.1:5000")
socket.On(Socket.EVENT_CONNECT, () => {
Console.Write("EVENT_CONNECT");
socket.Disconnect();
});
socket.Connect(); //tried to remove this
Console.ReadLine();
}
在兩個平台上均未打印任何內容。 看起來它們之間已建立連接(在燒瓶上,建立連接后將無限印刷此行: 127.0.0.1 - - [20/Jan/2016 11:23:43] "GET /socket.io/?EIO=3&transport=polling&t=635888858234059292-4049&b64=1 HTTP/1.1" 200 -
)
我究竟做錯了什么?
編輯:安裝gevent
我開始接收連接事件。 問題在於它卡在它上面,沒有其他函數被調用。 看一看燒瓶控制台,看起來它使用拉動而不是webSocket(某種后衛機制),所以我嘗試更改c#套接字選項:
IO.Options options = new IO.Options();
//options.Transports = ImmutableList.Create<string>(Polling.NAME);
options.Upgrade = true;
var socket = IO.Socket("http://127.0.0.1:5000", options);
但它保持打印傳輸=輪詢
EDIT2:
fb0f4c189334468dba90255880b528a4: Sending packet MESSAGE with 0
127.0.0.1 - - [20/Jan/2016 17:49:13] "GET /socket.io/?EIO=3&transport=polling&t=635889089536079075-2035&b64=1 HTTP/1.1" 200 355 0.002000
5cea6ce4dd8b47d79e79dd96747c26e4: Sending packet OPEN with {'pingTimeout': 60000, 'sid': '5cea6ce4dd8b47d79e79dd96747c26e4', 'upgrades': ['websocket'], 'pingInterval': 25000}
5cea6ce4dd8b47d79e79dd96747c26e4: Sending packet MESSAGE with 0
127.0.0.1 - - [20/Jan/2016 17:49:13] "GET /socket.io/?EIO=3&transport=polling&t=635889089536109077-2036&b64=1 HTTP/1.1" 200 355 0.003000
f768281808204af995421b4dbb2cda1c: Sending packet OPEN with {'pingTimeout': 60000, 'sid': 'f768281808204af995421b4dbb2cda1c', 'upgrades': ['websocket'], 'pingInterval': 25000}
CONNECTED
CONNECTED
f768281808204af995421b4dbb2cda1c: Sending packet MESSAGE with 0
127.0.0.1 - - [20/Jan/2016 17:49:13] "GET /socket.io/?EIO=3&transport=polling&t=635889089536149079-2037&b64=1 HTTP/1.1" 200 355 0.002000
e4eb16fcd12f41898ba58a309014b85c: Sending packet OPEN with {'pingTimeout': 60000, 'sid': 'e4eb16fcd12f41898ba58a309014b85c', 'upgrades': ['websocket'], 'pingInterval': 25000}
e4eb16fcd12f41898ba58a309014b85c: Sending packet MESSAGE with 0
127.0.0.1 - - [20/Jan/2016 17:49:13] "GET /socket.io/?EIO=3&transport=polling&t=635889089536179081-2038&b64=1 HTTP/1.1" 200 355 0.002000
70f45826d89b42bba3842e41b8ae8b08: Sending packet OPEN with {'pingTimeout': 60000, 'sid': '70f45826d89b42bba3842e41b8ae8b08', 'upgrades': ['websocket'], 'pingInterval': 25000}
70f45826d89b42bba3842e41b8ae8b08: Sending packet MESSAGE with 0
127.0.0.1 - - [20/Jan/2016 17:49:13] "GET /socket.io/?EIO=3&transport=polling&t=635889089536219083-2039&b64=1 HTTP/1.1" 200 355 0.002000
CONNECTED
CONNECTED
要將我的評論變成正確的答案:
問題似乎是在這些特定的socket.io實現之間,從長輪詢到WebSockets的升級機制不起作用。 通過將客戶端配置為直接使用WebSocket,我可以使其正常工作。 這里是一個例子:
var socket = IO.Socket("http://127.0.0.1:5000/data", new IO.Options
{
// The protocol upgrading does not properly work between Flask-SocketIO and SocketIOClientDotNet
Transports = ImmutableList<string>.Empty.Add(WebSocket.NAME)
});
問題與服務器發回的編碼有關。 Flask Socket IO不返回text / plain,這是當請求中包含base64參數(b64 = 1)時要返回的內容。 而是返回一個八位字節流。 C#庫自動將b64 = 1添加到請求中,不幸的是,更改ForceBase64屬性不會對此進行更改。 目前,我發現解決此問題的唯一方法是調整EngineIoClientDotNet的源代碼,編輯Polling.cs並刪除query.Add(“ b64”,“ 1”)。 如果該庫不支持二進制文件,但到目前為止,它現在已成功連接,則可能會產生不利影響。
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