add export data feature with authorisation by token

Dockerfile

@@ -212,6 +212,8 @@ COPY ./assets/images/* ${HTML_DIR}/
 # The files uploaded are in the data volume
 RUN  mv ./images ./images.origin && ln -s /var/www/data/images ./images
 
+COPY ./export_data.php ../
+
 # Remove configuration by web
 #RUN rm -rf mw-config
 

export_data.php

@@ -0,0 +1,44 @@
+<?php
+  $excludeArgs = "--exclude=data/log* --exclude=data/images/archive*";
+  $workingDir = "/var/www/";
+  $exportDir = "data";
+  $wgSitename = "mywiki";
+  $wgLanguageCode = "all";
+  $IP = "w";
+  $tokenFile = "/var/www/data/.export_token";
+
+  if( file_exists($tokenFile) ) {
+    trim(fgets(fopen($tokenFile, 'r')), " \t\n\r\0\x0B"); 
+  }else{
+    http_response_code(404);
+    exit();
+  }
+
+  if ( $accessToken === $_GET["token"] ) {
+
+    include "$IP/LocalSettings.custom.php" ;
+
+    $filename=strtolower($wgSitename."-".$wgLanguageCode."_".date('Y-m-d'));
+
+    if (isset($_GET["format"]) && $_GET["format"] == "tar") {
+      $type="x-tar";
+      $ext="tar";
+      $cmd="tar -C ".$workingDir." -c ".$excludeArgs." ".$exportDir;
+    } else {
+      $type="x-bzip2";
+      $ext="tar.bz2";
+      $cmd="tar -C ".$workingDir." -cj ".$excludeArgs." ".$exportDir;
+    }
+
+    $headerContentType = "Content-Type: application/".$type;
+    $headerContentDisposition = "Content-Disposition: attachment; filename=\"".$filename.".".$ext."\"";
+
+    header($headerContentType);
+    header($headerContentDisposition);
+    passthru($cmd,$err);
+
+  } else 
+    http_response_code(401);
+
+  exit();
+?>