From 6788efa5cef51f7e922e11e3509ad6681e4558ac Mon Sep 17 00:00:00 2001
From: Michael R Sweet <michaelrsweet@users.noreply.github.com>
Date: Tue, 2 Sep 2008 01:22:57 +0000
Subject: [PATCH] Use GeoIP-based mirror selection.

---
 www/phplib/mirrors.php | 64 ++++++++++++++++++++++++++++++++++++++++++
 www/software.php       | 44 ++++++++---------------------
 2 files changed, 76 insertions(+), 32 deletions(-)
 create mode 100644 www/phplib/mirrors.php

diff --git a/www/phplib/mirrors.php b/www/phplib/mirrors.php
new file mode 100644
index 0000000..25817aa
--- /dev/null
+++ b/www/phplib/mirrors.php
@@ -0,0 +1,64 @@
+<?php
+//
+// "$Id$"
+//
+// Mirror selection functions (depends on GeoIP PECL interface).
+//
+// Contents:
+//
+//   mirror_closest() - Return the closest mirror to the current IP.
+//
+
+//
+// List of download servers...
+//
+
+$MIRRORS = array(
+  "http://ftp.easysw.com/pub" => array("California, USA", 37.7898, -122.3942),
+  "http://ftp2.easysw.com/pub" => array("New Jersey, USA", 40.4619, -74.3561),
+  "http://ftp.funet.fi/pub/mirrors/ftp.easysw.com/pub" => array("Espoo, Finland", 60.2167, 24.6667),
+  "http://ftp.rz.tu-bs.de/pub/mirror/ftp.easysw.com/ftp/pub" => array("Braunschweig, Germany", 52.2667, 10.5333),
+);
+
+
+//
+// 'mirror_closest()' - Return the closest mirror to the current IP.
+//
+
+function				// O - Closest mirror
+mirror_closest()
+{
+  global $_SERVER, $MIRRORS;
+
+
+  // Get the current longitude for the client...
+  $current = geoip_record_by_name($_SERVER["REMOTE_ADDR"]);
+  $lon     = $current["longitude"];
+
+  // Loop through the mirrors to find the closest one, currently just using
+  // the longitude...
+  $closest_mirror   = "";
+  $closest_distance = 999;
+
+  reset($MIRRORS);
+  foreach ($MIRRORS as $mirror => $data)
+  {
+    $distance = abs($lon - $data[2]);
+    if ($distance > 180)
+      $distance = 360 - $distance;
+
+    if ($distance < $closest_distance)
+    {
+      $closest_mirror   = $mirror;
+      $closest_distance = $distance;
+    }
+  }
+
+  return ($closest_mirror);
+}
+
+
+//
+// End of "$Id$".
+//
+?>
diff --git a/www/software.php b/www/software.php
index f5fab38..577242b 100644
--- a/www/software.php
+++ b/www/software.php
@@ -10,16 +10,7 @@
 //
 
 include_once "phplib/html.php";
-
-
-// List of download servers...
-$sitelist = array(
-  "ftp://ftp.easysw.com/pub" => "California, USA via FTP",
-  "http://ftp.easysw.com/pub" => "California, USA via HTTP",
-  "http://ftp.funet.fi/pub/mirrors/ftp.easysw.com/pub" => "Espoo, Finland via HTTP",
-  "ftp://ftp.funet.fi/pub/mirrors/ftp.easysw.com/pub" => "Espoo, Finland via FTP",
-);
-
+include_once "phplib/mirrors.php";
 
 // Get the list of software files...
 $fp    = fopen("data/software.md5", "r");
@@ -42,10 +33,10 @@ if (array_key_exists("SITE", $_GET))
   setcookie("SITE", $site, time() + 90 * 86400, "/");
 }
 else if (array_key_exists("SITE", $_COOKIE) &&
-         array_key_exists($_COOKIE["SITE"], $sitelist))
+         array_key_exists($_COOKIE["SITE"], $MIRRORS))
   $site = $_COOKIE["SITE"];
 else
-  $site = "";
+  $site = mirror_closest();
 
 if (array_key_exists("VERSION", $_GET))
   $version = $_GET["VERSION"];
@@ -86,38 +77,27 @@ if ($file != "")
 {
   print("<h1>Download</h1>\n");
 
-  if ($site != "")
-    print("<p>Your download should begin shortly. If not, please "
-         ."<a href='$site/$file'>click here</a> to download the file "
-	 ."from the current mirror.</p>\n");
-  else
-    print("<p>Please select a mirror site below to begin the download.</p>\n");
-
-  print("<form action='$PHP_SELF' method='GET' name='download'>\n"
+  print("<p>Your download should begin shortly. If not, please "
+       ."<a href='$site/$file'>click here</a> to download the file "
+       ."from the current mirror.</p>\n"
+       ."<form action='$PHP_SELF' method='GET' name='download'>\n"
        ."<input type='hidden' name='FILE' value='"
        . htmlspecialchars($file, ENT_QUOTES) . "'>\n"
        ."<input type='hidden' name='VERSION' value='"
        . htmlspecialchars($version, ENT_QUOTES) . "'>\n");
 
-  if ($site == "")
-    print("<input type='radio' name='SITE' value='' checked>None<br>\n");
-
-  reset($sitelist);
-  while (list($key, $val) = each($sitelist))
+  reset($MIRRORS);
+  while (list($key, $val) = each($MIRRORS))
   {
     print("<input type='radio' name='SITE' value='$key' "
          ."onClick='document.download.submit();'");
     if ($site == $key)
       print("  checked");
-    print(">$val<br>\n");
+    print(">$val[0]<br>\n");
   }
 
-  if ($site != "")
-    print("<p><input type='submit' value='Change Mirror Site'>\n");
-  else
-    print("<p><input type='submit' value='Select Mirror Site'>\n");
-
-  print("</form>\n");
+  print("<p><input type='submit' value='Change Mirror Site'>\n"
+       ."</form>\n");
 }
 else
 {