From 31f94efdd8454cfb12e689387973e47d9e1690f9 Mon Sep 17 00:00:00 2001
From: Bryan Ashby <bryan@l33t.codes>
Date: Thu, 4 Feb 2021 19:27:57 -0700
Subject: [PATCH] Better handling of bots hitting bad Gopher selectors

---
 core/servers/content/gopher.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/core/servers/content/gopher.js b/core/servers/content/gopher.js
index 442ecdcb..95c0eef1 100644
--- a/core/servers/content/gopher.js
+++ b/core/servers/content/gopher.js
@@ -27,7 +27,6 @@ const _                     = require('lodash');
 const fs                    = require('graceful-fs');
 const paths                 = require('path');
 const moment                = require('moment');
-const async                 = require('async');
 
 const ModuleInfo = exports.moduleInfo = {
     name        : 'Gopher',
@@ -89,7 +88,15 @@ exports.getModule = class GopherModule extends ServerModule {
             socket.setEncoding('ascii');
 
             socket.on('data', data => {
-                this.routeRequest(data, socket);
+                //  sanitize a bit - bots like to inject garbage
+                data = data.replace(/[^ -~]/g, '');
+                if (data) {
+                    this.routeRequest(data, socket);
+                } else {
+                    this.notFoundGenerator('**invalid selector**', res => {
+                        return socket.end(`${res}`);
+                    });
+                }
             });
 
             socket.on('error', err => {