---
module: [kind=event] websocket_message
---

<!--
SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers

SPDX-License-Identifier: MPL-2.0
-->

The [`websocket_message`] event is fired when a message is received on an open WebSocket connection.

This event is normally handled by [`http.Websocket.receive`], but it can also be pulled manually.

## Return Values
1. [`string`]: The event name.
2. [`string`]: The URL of the WebSocket.
3. [`string`]: The contents of the message.
4. [`boolean`]: Whether this is a binary message.

## Example
Prints a message sent by a WebSocket:
```lua
local myURL = "wss://example.tweaked.cc/echo"
local ws = http.websocket(myURL)
ws.send("Hello!")
local event, url, message
repeat
    event, url, message = os.pullEvent("websocket_message")
until url == myURL
print("Received message from " .. url .. " with contents " .. message)
ws.close()
```