diff --git a/index.php b/index.php
index c817b1e..771b016 100755
--- a/index.php
+++ b/index.php
@@ -9,7 +9,6 @@ $ID_LENGTH=3;               //length of the random file ID
 $STORE_PATH="files/";       //directory to store uploaded files in
 $LOG_PATH=null;             //path to log uploads + resulting links to
 $DOWNLOAD_PATH="%s";        //the path part of the download url. %s = placeholder for filename
-$HTTP_PROTO="https";        //protocol to use in links
 $SITE_URL=site_url();
 $MAX_EXT_LEN=7;             //max. length for file extensions
 $EXTERNAL_HOOK=null;
@@ -109,7 +108,7 @@ function store_file($name, $tmpfile, $formatted = false)
 {
     global $STORE_PATH;
     global $ID_LENGTH;
-    global $HTTP_PROTO;
+    global $SITE_URL;
     global $DOWNLOAD_PATH;
     global $MAX_FILESIZE;
     global $EXTERNAL_HOOK;
@@ -183,10 +182,8 @@ function store_file($name, $tmpfile, $formatted = false)
     }
 
     //print the download link of the file
-    $url = sprintf('%s://%s/'.$DOWNLOAD_PATH,
-                    $HTTP_PROTO,
-                    $_SERVER["HTTP_HOST"], 
-                    $basename);
+    $url = sprintf($SITE_URL.'%s', $basename);
+
     if ($formatted)
     {
         printf('<pre>Access your file here: <a href="%s">%s</a></pre>', $url, $url);
@@ -267,7 +264,7 @@ function purge_files()
 // send a ShareX custom uploader config as .json
 function send_sharex_config()
 {
-    global $HTTP_PROTO;
+    global $SITE_URL;
     $host = $_SERVER["HTTP_HOST"];
     $filename =  $host.".sxcu";
     $content = <<<EOT
@@ -275,7 +272,7 @@ function send_sharex_config()
   "Name": "$host",
   "DestinationType": "ImageUploader, FileUploader",
   "RequestType": "POST",
-  "RequestURL": "$HTTP_PROTO://$host/",
+  "RequestURL": "$SITE_URL",
   "FileFormName": "file",
   "ResponseType": "Text"
 }
@@ -289,14 +286,14 @@ EOT;
 // send a Hupl uploader config as .hupl (which is just JSON)
 function send_hupl_config()
 {
-    global $HTTP_PROTO;
+    global $SITE_URL;
     $host = $_SERVER["HTTP_HOST"];
     $filename =  $host.".hupl";
     $content = <<<EOT
 {
   "name": "$host",
   "type": "http",
-  "targetUrl": "$HTTP_PROTO://$host/",
+  "targetUrl": "$SITE_URL",
   "fileParam": "file"
 }
 EOT;
@@ -311,15 +308,14 @@ EOT;
 function print_index()
 {
     global $ADMIN_EMAIL;
-    global $HTTP_PROTO;
+    global $SITE_URL;
     global $MAX_FILEAGE;
     global $MAX_FILESIZE;
     global $MIN_FILEAGE;
     global $DECAY_EXP;
 
-    $url = $HTTP_PROTO."://".$_SERVER["HTTP_HOST"].$_SERVER['REQUEST_URI'];
-    $sharex_url = $url."?sharex";
-    $hupl_url = $url."?hupl";
+    $sharex_url = $SITE_URL."?sharex";
+    $hupl_url = $SITE_URL."?hupl";
 
 echo <<<EOT
 <!DOCTYPE html>
