![]() Keep your eyes open for even more input formats in the future. In fact, each argument may use a different input format. Postman supports various input formats like JSON, text, binary and more, which you can toggle as you wish. Also, you can attach additional logic to your event by clicking “+Arg”. Your first problem is to identify the user that sent the POST request, so that you can locate his/her Socket.IO connection. You can write (or paste) your messages into the message editor to fire event, type an event name, and click Send. If I understand your example, you are mixing Flask/HTTP and Socket.IO data in an invalid way. Like raw WebSockets, Socket.IO is bidirectional, which means you can send messages to the server whenever you want. Pro tip: Socket.IO events can have multiple arguments, so we’ve provided an argument selector to toggle between them (if there is more than one). The timeline shows a preview of each event, giving you an overview of the information, but you can dive into the full content of an event by simply clicking to expand it. When you send or receive an event, it will appear in the unified event timeline, showing you the entire history of the connection in one place. You can quickly disable and re-enable listeners with a single click, making it easy and flexible to listen to different combinations of events that interest you. Since this is Socket.IO, you will only receive events for which you have added listeners. To do this, type the name of an event in the Listener panel, and click the ”+” to add it. Now that you are connected to your server, you need to listen for specific events. click on dropdown which says “Raw” and select Socket.io instead.Here’s how you can establish a connection with your Socket.IO server in Postman-with just a few steps: If you have used raw WebSockets in Postman before, you will already be familiar with the user interface of Socket.IO. And you will no longer be blind, because you will now have tons of tools and diagnostics at your fingertips. Instead of writing code over and over to debug your Socket.IO API, you can now simply open Postman, connect to your server, and interactively debug the API in real time. This represents a major step forward for Postman in our goal of providing exceptional tooling and support for the WebSockets community. ![]() With many developers using Socket.IO in conjunction with the HTTP API, you can now enjoy the benefits of Postman when switching between these two paradigms. ![]() Socket.IO is one of the most popular libraries that enables real-time, bidirectional and event-based communication between a web client and a server, using WebSockets under the hood. In addition, I have also shown an example of how message passing socket.io works between server and postman (client). Have you ever thought of using Postman to test your socket.io server? The latest version of Postman supports socket.io testing with some limitations which are listed below. How to test your socket.io backend without developing frontend?
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