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improvement: add regex validation before username checks #117

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Merged
json-hunter07 merged 1 commit into from
Dec 23, 2025
Merged

improvement: add regex validation before username checks #117

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17 changes: 14 additions & 3 deletions user_scanner/social/mastodon.py
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Original file line number Diff line number Diff line change
@@ -1,8 +1,19 @@
import re
from user_scanner.core.orchestrator import status_validate
from user_scanner.core.result import Result


def validate_mastodon(user):
url = f"https://mastodon.social/@{user}"
def validate_mastodon(user: str) -> Result:
if not (3 <= len(user) <= 30):
return Result.error("Length must be 3-30 characters")

if not re.match(r'^[a-zA-Z0-9_-]+$', user):
return Result.error("Usernames can only contain letters, numbers, underscores and hyphens")

if not re.match(r'^[a-zA-Z0-9].*[a-zA-Z0-9]$', user):
return Result.error("Username must start and end with a letter or number")

url = f"https://mastodon.social/api/v1/accounts/lookup?acct={user}"

return status_validate(url, 404, 200, follow_redirects=True)

Expand All @@ -16,4 +27,4 @@ def validate_mastodon(user):
elif result == 0:
print("Unavailable!")
else:
print("Error occured!")
print(f"Error occurred! Reason: {result.get_reason()}")