From 9dd0d90f69d7737d03b6747ae46394035396ef5b Mon Sep 17 00:00:00 2001
From: Robin Appelman <icewind1991@gmail.com>
Date: Sat, 16 Apr 2011 12:35:21 +0200
Subject: [PATCH] publiclink plugin

Allows sharing files by creating a public link, no gui yet.
---
 plugins/publiclink/db_structure.xml | 47 ++++++++++++++++++
 plugins/publiclink/getfile.php      | 10 ++++
 plugins/publiclink/lib_public.php   | 77 +++++++++++++++++++++++++++++
 plugins/publiclink/makelink.php     | 13 +++++
 plugins/publiclink/plugin.xml       | 17 +++++++
 5 files changed, 164 insertions(+)
 create mode 100644 plugins/publiclink/db_structure.xml
 create mode 100644 plugins/publiclink/getfile.php
 create mode 100644 plugins/publiclink/lib_public.php
 create mode 100644 plugins/publiclink/makelink.php
 create mode 100755 plugins/publiclink/plugin.xml

diff --git a/plugins/publiclink/db_structure.xml b/plugins/publiclink/db_structure.xml
new file mode 100644
index 00000000000..de63b03f445
--- /dev/null
+++ b/plugins/publiclink/db_structure.xml
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="ISO-8859-1" ?>
+<database>
+	 <name>*dbname*</name>
+	 <create>true</create>
+	 <overwrite>false</overwrite>
+	 <charset>latin1</charset>
+	 <table>
+		<name>*dbprefix*publiclink</name>
+		<declaration>
+			<field>
+				<name>token</name>
+				<type>text</type>
+				<default></default>
+				<notnull>true</notnull>
+				<length>40</length>
+			</field>
+			<field>
+				<name>path</name>
+				<type>text</type>
+				<default></default>
+				<notnull>true</notnull>
+				<length>128</length>
+			</field>
+			<field>
+				<name>user</name>
+				<type>text</type>
+				<default>
+				</default>
+				<notnull>true</notnull>
+				<length>64</length>
+			 </field>
+			 <field>
+				<name>expire_time</name>
+				<type>timestamp</type>
+				<notnull>true</notnull>
+			</field>
+			<index>
+				<name>token</name>
+				<unique>true</unique>
+				<field>
+					<name>token</name>
+					<sorting>ascending</sorting>
+				</field>
+			</index>
+		</declaration>
+	</table>
+</database>
diff --git a/plugins/publiclink/getfile.php b/plugins/publiclink/getfile.php
new file mode 100644
index 00000000000..c579dc9246c
--- /dev/null
+++ b/plugins/publiclink/getfile.php
@@ -0,0 +1,10 @@
+<?php
+$RUNTIME_NOAPPS=true; //no need to load the apps
+
+require_once '../../lib/base.php';
+
+require_once 'lib_public.php';
+
+$token=$_GET['token'];
+OC_PublicLink::downloadFile($token);
+?>
\ No newline at end of file
diff --git a/plugins/publiclink/lib_public.php b/plugins/publiclink/lib_public.php
new file mode 100644
index 00000000000..494f84fdb7a
--- /dev/null
+++ b/plugins/publiclink/lib_public.php
@@ -0,0 +1,77 @@
+<?php
+class OC_PublicLink{
+	/**
+	 * create a new public link
+	 * @param string path
+	 * @param int (optional) expiretime time the link expires, as timestamp
+	 */
+	public function __construct($path,$expiretime=0){
+		if($path && OC_FILESYSTEM::file_exists($path)){
+			$token=sha1("$path-$expiretime");
+			$user=$_SESSION['user_id'];
+			$query=OC_DB::prepare("INSERT INTO *PREFIX*publiclink VALUES(?,?,?,?)");
+			$result=$query->execute(array($token,$path,$user,$expiretime));
+			if( PEAR::isError($result)) {
+				$entry = 'DB Error: "'.$result->getMessage().'"<br />';
+				$entry .= 'Offending command was: '.$result->getDebugInfo().'<br />';
+				error_log( $entry );
+				die( $entry );
+			}
+			$this->token=$token;
+		}
+	}
+	
+	/**
+	 * download a file shared by a public link
+	 * @param string token
+	 */
+	public static function downloadFile($token){
+		//remove expired links
+		$query=OC_DB::prepare("DELETE FROM *PREFIX*publiclink WHERE expire_time < NOW() AND expire_time!=0");
+		$query->execute();
+		
+		//get the path and the user
+		$query=OC_DB::prepare("SELECT user,path FROM *PREFIX*publiclink WHERE token=?");
+		$result=$query->execute(array($token));
+		$data=$result->fetchAll();
+		if(count($data)>0){
+			$path=$data[0]['path'];
+			$user=$data[0]['user'];
+			
+			//login
+			$_SESSION['user_id']=$user;
+			
+			//prepare the filesystem
+			OC_UTIL::setupFS();
+			
+			//get time mimetype and set the headers
+			$mimetype=OC_FILESYSTEM::getMimeType($path);
+	// 		header('Content-Disposition: attachment; filename="'.basename($path).'"');
+			header('Content-Transfer-Encoding: binary');
+			header('Expires: 0');
+			header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
+			header('Pragma: public');
+			header('Content-Type: ' . $mimetype);
+			header('Content-Length: ' . OC_FILESYSTEM::filesize($path));
+			
+			//download the file
+			ob_clean();
+			OC_FILESYSTEM::readfile($path);
+		}else{
+			header("HTTP/1.0 404 Not Found");
+			echo '404 Not Found';
+			die();
+		}
+	}
+	
+	/**
+	 * get the token for the public link
+	 * @return string
+	 */
+	public function getToken(){
+		return $this->token;
+	}
+	
+	private $token;
+}
+?>
\ No newline at end of file
diff --git a/plugins/publiclink/makelink.php b/plugins/publiclink/makelink.php
new file mode 100644
index 00000000000..1de65e7ec6f
--- /dev/null
+++ b/plugins/publiclink/makelink.php
@@ -0,0 +1,13 @@
+<?php
+$RUNTIME_NOAPPS=true; //no need to load the apps
+
+require_once '../../lib/base.php';
+
+require_once 'lib_public.php';
+
+$path=$_GET['path'];
+$expire=(isset($_GET['expire']))?$_GET['expire']:0;
+
+$link=new OC_PublicLink($path,$expire);
+echo $link->getToken();
+?>
\ No newline at end of file
diff --git a/plugins/publiclink/plugin.xml b/plugins/publiclink/plugin.xml
new file mode 100755
index 00000000000..75abed6cf08
--- /dev/null
+++ b/plugins/publiclink/plugin.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0"?>
+<plugin version="1.0">
+	<info>
+		<id>publiclink</id>
+		<name>Simple file sharing by creating a public link to a file</name>
+		<version>0.1</version>
+		<licence>AGPL</licence>
+		<author>Robin Appelman</author>
+		<require>1.1</require>
+	</info>
+	<runtime>
+		<include>lib_public.php</include>
+	</runtime>
+	<install>
+		<database>db_structure.xml</database>
+	</install>
+</plugin>
-- 
2.39.5