Discord Invite Gateway

About

Discord Invite Gateway is a web gateway that offers additional protection against automated usage of Discord invites.

Features

• Modern responsive (yet basic) dark UI
• Google reCAPTCHA (v2)
• Guild information preview
• Countdown before expiration (w/ true expiration)
• Very dynamic configuration
• Error handling
• Debug mode (view raw Discord API response)

Prerequisites

For this to function as intended, the following is required.

• PHP 7
• PHP cURL & JSON modules
• Google account, with Google reCAPTCHA v2 (invisible) set up for the site this would be hosted on
• Discord account, with an application created (a bot)

Configuring

There are a couple files that you will need to make changes to. Look out for the names of the constants and variables mentioned in the tables below and modify their values to what they should be.

You will need to:

• Create a Discord application (https://discord.com/developers/applications/)
• Prepare your Google reCAPTCHA v2 (invisible) site and secret key (https://www.google.com/recaptcha)
• Prepare your application (bot) client ID and token

clientconfig.php

Constant	Description
UI_TITLE	Page and header title
UI_ICON	Favicon
UI_STYLE_PATH	Path to stylesheet
UI_THEME_COLOUR	Google Chrome's mobile header and status bar colour
RECAPTCHA_SITE_KEY	Google reCAPTCHA site key
JQUERY_PATH	URI for jQuery library
JQUERY_SRI_INTEGRITY	Sub-resource integrity hash (https://www.srihash.org/) for jQuery library
JQUERY_SRI_CROSSORIGIN	Sub-resource integrity cross-origin
LIFETIME_SAFE	If visited the very last second, have there still be an invite page with spare time to join -- add on amount of seconds set here to expiry (refer to the next table)

invite.php

Variable	Description
token	Discord application (bot) token -- Wiki entry with how-to
domain	Domain of where the Discord API is located
channel	ID of the channel (refer to the link in the token part of this table)
uri	The entire URI -- don't really need to touch that
expiry	Time (in seconds) before invite expiration (refer to LIFETIME_SAFE in the previous table)
maxUses	Amount of times the same invite can be used
tempMem	Temporary membership
defaultIcon	Icon to use if the guild has no icon set
userAgent	User agent -- refer to Discord's documentation regarding UA format
grcUri	Google reCAPTCHA API URI
grcSecKey	Google reCAPTCHA secret key
cTimeOut	cURL request timeout for all external backend communication (in seconds)

• To enable debugging, set the constant DEBUG (in the core class) to true

Adding the bot

Once you have all of that set up, add the bot to a guild of your choice using https://discord.com/oauth2/authorize?client_id={CLIENT_ID}&scope=bot&permissions=1. Replace {CLIENT_ID} with your application's (bot's) client ID. permissions with 1 only grants the CREATE_INSTANT_INVITE permission which is required for the bot to create invites.