From 67549c71b8be00c7ef570b6054855a13861d9722 Mon Sep 17 00:00:00 2001
From: Etienne CHAMPETIER <etienne.champetier@fiducial.net>
Date: Thu, 18 Jul 2013 15:09:27 +0200
Subject: [PATCH] Add X-Accel-Redirect support for Nginx (a sibiling of
 X-Sendfile)

For it to work you have to modify your nginx conf to send X-Accel-Mapping header using
-> proxy_set_header X-Accel-Mapping /var/www/ajaxplorer/data/=/data/;
or
-> fastcgi_param X-Accel-Mapping /var/www/ajaxplorer/data/=/data/;
and you have to use the "internal" keyword
-> location ~ /data/ { internal; }

The X-Accel-Mapping idea come from the rails world
---
 .../plugins/access.fs/class.fsAccessDriver.php   | 16 ++++++++++++++++
 core/src/plugins/access.fs/manifest.xml          |  3 ++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/core/src/plugins/access.fs/class.fsAccessDriver.php b/core/src/plugins/access.fs/class.fsAccessDriver.php
index 9861e8b77e..42823f8a43 100644
--- a/core/src/plugins/access.fs/class.fsAccessDriver.php
+++ b/core/src/plugins/access.fs/class.fsAccessDriver.php
@@ -1236,6 +1236,22 @@ function readFile($filePathOrData, $headerType="plain", $localName="", $data=fal
                 header('Content-Disposition: attachment; filename="' . basename($filePathOrData) . '"');
                 return;
             }
+	if($this->getFilteredOption("USE_XACCELREDIRECT", $this->repository->getId()) && $this->wrapperClassName == "fsAccessWrapper" && array_key_exists("X-Accel-Mapping",$_SERVER)){
+		if(!$realfileSystem) $filePathOrData = fsAccessWrapper::getRealFSReference($filePathOrData);
+		$filePathOrData = str_replace("\\", "/", $filePathOrData);
+		$filePathOrData = SystemTextEncoding::toUTF8($filePathOrData);
+		$mapping = explode('=',$_SERVER['X-Accel-Mapping']);
+		$replacecount = 0;
+		$accelfile = str_replace($mapping[0],$mapping[1],$filePathOrData,$replacecount);
+		if($replacecount == 1){
+			header("X-Accel-Redirect: $accelfile");
+			header("Content-type: application/octet-stream");
+			header('Content-Disposition: attachment; filename="' . basename($accelfile) . '"');
+			return;
+		} else {
+			AJXP_Logger::logAction("error","Problem with X-Accel-Mapping for file $filePathOrData");
+		}
+	}
 			$stream = fopen("php://output", "a");
 			if($realfileSystem){
 				AJXP_Logger::debug("realFS!", array("file"=>$filePathOrData));
diff --git a/core/src/plugins/access.fs/manifest.xml b/core/src/plugins/access.fs/manifest.xml
index 9c75565969..e78c93879b 100644
--- a/core/src/plugins/access.fs/manifest.xml
+++ b/core/src/plugins/access.fs/manifest.xml
@@ -14,6 +14,7 @@
         <global_param name="PROBE_REAL_SIZE" type="boolean" label="CONF_MESSAGE[Real Size Probing]" description="CONF_MESSAGE[Use system command line to get the filesize instead of php built-in function (fixes the 2Go limitation)]" default="false"/>
         <global_param name="USE_POSIX" type="boolean" label="CONF_MESSAGE[Use POSIX]" description="CONF_MESSAGE[Use php POSIX extension to read files permissions. Only works on *nix systems.]" default="false"/>
         <global_param name="USE_XSENDFILE" type="boolean" label="CONF_MESSAGE[X-SendFile Active]" description="CONF_MESSAGE[Delegates all download operations to the webserver using the X-SendFile header. Warning, this is an external module to install for Apache. Module is active by default in Lighttpd. Warning, you have to manually add the folders where files will be downloaded in the module configuration (XSendFilePath directive)]" default="false"/>
+        <global_param name="USE_XACCELREDIRECT" type="boolean" label="CONF_MESSAGE[X-Accel-Redirect Active]" description="CONF_MESSAGE[Delegates all download operations to nginx using the X-Accel-Redirect header. Warning, you have to add some configuration in nginx, like X-Accel-Mapping]" default="false"/>
         <global_param group="MIXIN_MESSAGE[Metadata and indexation]" name="DEFAULT_METASOURCES" type="string" label="MIXIN_MESSAGE[Default Metasources]" description="MIXIN_MESSAGE[Comma separated list of metastore and meta plugins, that will be automatically applied to all repositories created with this driver]" mandatory="false" default="metastore.serial,meta.filehasher,index.lucene"/>
 	</server_settings>
 	<class_definition filename="plugins/access.fs/class.fsAccessDriver.php" classname="fsAccessDriver"/>
@@ -38,4 +39,4 @@
         </hooks>
 	</registry_contributions>
     <class_stream_wrapper filename="plugins/access.fs/class.fsAccessWrapper.php" classname="fsAccessWrapper" protocol="ajxp.fs"/>
-</ajxpdriver>
\ No newline at end of file
+</ajxpdriver>