---
module: [kind=event] websocket_failure
see: http.websocketAsync To send an HTTP request.
---

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SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers

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

The [`websocket_failure`] event is fired when a WebSocket connection request fails.

This event is normally handled inside [`http.websocket`], but it can still be seen when using [`http.websocketAsync`].

## Return Values
1. [`string`]: The event name.
2. [`string`]: The URL of the site requested.
3. [`string`]: An error describing the failure.

## Example
Prints an error why the website cannot be contacted:
```lua
local myURL = "wss://example.tweaked.cc/not-a-websocket"
http.websocketAsync(myURL)
local event, url, err
repeat
    event, url, err = os.pullEvent("websocket_failure")
until url == myURL
print("The URL " .. url .. " could not be reached: " .. err)
```