From f9c13c0ad5c556bede49d3e0f6e5f58ca26161c3 Mon Sep 17 00:00:00 2001
From: Lasha <72510037+LashaJini@users.noreply.github.com>
Date: Thu, 6 Jun 2024 17:55:37 +0400
Subject: [PATCH] feat: add max length check for email (#1508)

## What kind of change does this PR introduce?

feature: add max length check for email.

## What is the current behavior?

Currently, email length is only checked on db side. Email has max length
255 characters, when user sends (>255 characters) large email to
`/admin/users` endpoint, db is doing unnecessary queries.

![Screenshot from 2024-03-30
02-40-54](https://github.com/supabase/auth/assets/72510037/10a36b08-5112-4737-9c3a-b9e01c7ccc10)


## What is the new behavior?

Code returns early if user enters large email. There will be no db
queries.

![Screenshot from 2024-03-30
02-44-31](https://github.com/supabase/auth/assets/72510037/735a4e79-561f-412a-b536-6dac3aa6f339)
---
 internal/api/mail.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/api/mail.go b/internal/api/mail.go
index 86c31f56a..30f358ad2 100644
--- a/internal/api/mail.go
+++ b/internal/api/mail.go
@@ -550,6 +550,9 @@ func validateEmail(email string) (string, error) {
 	if email == "" {
 		return "", badRequestError(ErrorCodeValidationFailed, "An email address is required")
 	}
+	if len(email) > 255 {
+		return "", badRequestError(ErrorCodeValidationFailed, "An email address is too long")
+	}
 	if err := checkmail.ValidateFormat(email); err != nil {
 		return "", badRequestError(ErrorCodeValidationFailed, "Unable to validate email address: "+err.Error())
 	}