From ebb30781cc36b38473bb308c213cf8f8ca51f147 Mon Sep 17 00:00:00 2001
From: Dominique Fournier <dominique@fournier38.fr>
Date: Mon, 27 Jun 2016 12:55:05 +0000
Subject: [PATCH]   * outputhtml : add a timestamp after the internal resources
 when creating the page. Like this, when updating a script, image or css file,
 it is updated by the client automatically (the browser don't use its cache)

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@2771 bf3deb0d-5f1a-0410-827f-c0cc1f45334c
---
 outputhtml.php | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/outputhtml.php b/outputhtml.php
index 895b280..c0a35db 100644
--- a/outputhtml.php
+++ b/outputhtml.php
@@ -83,7 +83,6 @@ class outputhtml extends output
 EOT;
       $resView = str_replace ("{content}", $resView, $layoutPage);
     }
-
     // Do the title replacement in the replacement structure
     if (! isset ($replacement["{title}"]))
       $replacement["{title}"] = $title;
@@ -93,6 +92,40 @@ EOT;
     foreach ($replacement as $key=>$val)
       $resView = str_replace ($key, $val, $resView);
 
+    // Manage the timestamp/md5sum for the external files managed by this
+    // server.
+    $dom = new DOMDocument ();
+    @$dom->loadHTML ($resView);
+    foreach (array ("script"=>"src", "link"=>"href", "img"=>"src")
+             as $key=>$val)
+    {
+      $files = $dom->getElementsByTagName ($key);
+      for ($i = 0 ; $i < $files->length ; $i++)
+      {
+        if ($files[$i]->hasAttribute ($val) === false)
+          continue;
+        $src = $files[$i]->getAttribute ($val);
+        if ($src === "")
+          continue;
+        if (substr ($src, 0, 7) === "http://" ||
+            substr ($src, 0, 8) === "https://" ||
+            substr ($src, 0, 2) === "//")
+          continue;
+        // If there is already a ? with some variables, don't add the timestamp
+        if (strpos ($src, "?"))
+          continue;
+        if (! array_key_exists ("{baseurl}", $replacement))
+          continue;
+        $srcFile = substr ($src, strlen ($replacement["{baseurl}"]));
+        if (file_exists ($srcFile))
+          $srcHash = filemtime ($srcFile);
+        else
+          $srcHash = time();
+        $dom->getElementsByTagName ($key)[$i]->setAttribute ($val,
+                                                             "$src?$srcHash");
+      }
+    }
+    echo $dom->saveHTML();exit;
     echo $resView;
     if (!defined ("PHPUNIT"))
       exit;