But when I try to connect to the server using Postman SocketIO, I am getting Error: Unexpected server response: 400 in Postman and Flask Server is logging SocketIO 400. A Socket belongs to a certain Namespace (by default /) and uses an underlying Manager to communicate.Ī Socket is basically an EventEmitter which sends events to - and receive events from - the server over the network. I implemented a Flask SocketIO server using Flask-SocketIO 5.3.2 and it is working well when I test it using a JavaScript client even from different origin. ![]() Socket Ī Socket is the fundamental class for interacting with the server. Sets the timeout option, or returns it if no parameters are passed. Other keys will be ignored and should be passed when instancing a new Manager(nsp, options). Only auth ( ) is read from the options object. manager.socket(nsp, options) Ĭreates a new Socket for the given namespace. Sets the reconnectionDelayMax option, or returns it if no parameters are passed. Sets the reconnectionDelay option, or returns it if no parameters are passed. Sets the reconnectionAttempts option, or returns it if no parameters are passed. Sets the reconnection option, or returns it if no parameters are passed. Query parameters can also be provided, either with the query option or directly in the url (example: To understand what happens under the hood, the following example: For example, if the url is a transport connection will be established to and a Socket.IO connection will be established to /users. Passing this option is the equivalent of passing "force new connection": true or forceNew: true.Ī new Socket instance is returned for the namespace specified by the pathname in the URL, defaulting to /. forceNew whether to create a new connectionĬreates a new Manager for the given URL, and attempts to reuse an existing Manager for subsequent calls, unless the multiplex option is passed with false.there is no connection between HTTP requests and a Socket.IO connection, so youll have to add some sort of authentication on both sides, or if you prefer something. My flask server looks like: app Flask(name) app.configSECRETKEY secret app.config. Your first problem is to identify the user that sent the POST request, so that you can locate his/her Socket.IO connection. I am using postman to post the token value. ![]() Both the client and the server must use the same revision in order to understand each other. If I understand your example, you are mixing Flask/HTTP and Socket.IO data in an invalid way. The protocol defines the format of the packets exchanged between the client and the server. All I had to do was add each client on postman to a room that the server recognices and that did the trick for me. ![]() The protocol revision number (currently: 5). Neiter does postman support the socket.io protocol nor does it load the socket.io client.
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