From 0ae9631880069d1fabcae2e6941ac9c311f873bd Mon Sep 17 00:00:00 2001
From: Linventif <gregoire.becue@proton.me>
Date: Fri, 28 Jun 2024 18:46:43 +0000
Subject: [PATCH] add: isPrivateIP and allow http on private IP

---
 lua/gmod_integration/shared/sh_http.lua |  4 ++--
 lua/gmod_integration/shared/sh_main.lua | 13 +++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/lua/gmod_integration/shared/sh_http.lua b/lua/gmod_integration/shared/sh_http.lua
index e5a2667..b4a1ba8 100644
--- a/lua/gmod_integration/shared/sh_http.lua
+++ b/lua/gmod_integration/shared/sh_http.lua
@@ -2,7 +2,7 @@ local apiVersion = "v3"
 gmInte.http = gmInte.http || {}
 
 local function getAPIURL(endpoint)
-    local url = "https://" .. gmInte.config.apiFQDN .. "/" .. apiVersion
+    local method = gmInte.isPrivateIP(gmInte.config.apiFQDN) && "http" || "https"
 
     endpoint = string.gsub(endpoint, ":serverID", gmInte.config.id)
 
@@ -10,7 +10,7 @@ local function getAPIURL(endpoint)
         endpoint = string.gsub(endpoint, ":steamID64", LocalPlayer():SteamID64())
     end
 
-    return url .. endpoint
+    return method .. "://" .. gmInte.config.apiFQDN .. "/" .. apiVersion .. endpoint
 end
 
 local function showableBody(endpoint)
diff --git a/lua/gmod_integration/shared/sh_main.lua b/lua/gmod_integration/shared/sh_main.lua
index 280f944..f9c5f83 100644
--- a/lua/gmod_integration/shared/sh_main.lua
+++ b/lua/gmod_integration/shared/sh_main.lua
@@ -24,4 +24,17 @@ end
 function gmInte.logHint(msg, debug)
     if (debug && !gmInte.config.debug) then return end
     print("[" .. os.date("%Y-%m-%d %H:%M:%S") .. "] [Gmod Integration] [HINT] " .. msg)
+end
+
+// Is Private IP
+function gmInte.isPrivateIP(ip)
+    // detect localhost
+    if (ip == "localhost") then return true end
+    // detect private IP addresses (RFC 1918)
+    local parts = string.Explode(".", ip)
+    if (parts[1] == "192" && parts[2] == "168") then return true end
+    if (parts[1] == "10") then return true end
+    if (parts[1] == "172" && tonumber(parts[2]) >= 16 && tonumber(parts[2]) <= 31) then return true end
+    if (parts[1] == "127") then return true end
+    return false
 end
\ No newline at end of file