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oc-1875 : running OwnCloud on an alias (or not) with Nginx [the real one] #385

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illwieckz wants to merge 7 commits into from
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oc-1875 : running OwnCloud on an alias (or not) with Nginx [the real one] #385

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5e637fb
calculate WEBROOT and SUBURI from SERVER env to run OC on an alias (o…
Nov 13, 2012
7b2c60d
resolve conflict (manual merge) after rebasing
Jan 28, 2013
975ec14
upstream modify one line that does the same : use the upstream code f…
Jan 28, 2013
c67b150
follow coding guidelines
Jan 28, 2013
b407d60
use realpath() function to have this code working when path containes…
Jan 28, 2013
f962a8e
some comments added as requested here : https://github.com/owncloud/c…
Jan 28, 2013
1aa553f
follow coding guidelines
Jan 28, 2013
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99 changes: 86 additions & 13 deletions lib/base.php
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Original file line number Diff line number Diff line change
Expand Up @@ -125,26 +125,99 @@ public static function autoload($className)
public static function initPaths()
{
// calculate the root directories

// Some comments because this code is a bit tricky, as requested here :
// https://github.com/owncloud/core/pull/385

// Imagine your httpd document root is '/var/www'
// -> requesting /index.html serves /var/www/index.html
// Imagine you have an alias named 'alias'
// -> requesting /alias/index.html serves /var/www/index.html
// Imagine you put owncloud on a subdir named 'dir'
// -> requesting /alias/dir/index.html serves /var/www/dir/index.html

// When requesting /alias/dir/index.php, it require lib/base.php
// __DIR__ == '/var/www/dir/lib'
//
// OC::$SERVERROOT=str_replace("\\", '/', substr(__DIR__, 0, -4));
// is similar to
// OC::$SERVERROOT=str_replace("\\", '/', substr(__DIR__, 0, strlen('/lib')));
//
// after that,
// OC::$SERVERROOT == '/var/www/dir'

// Note : I suppose that str_replace("\", '/', str) is to translate DOS path into Web path because
// various substr calls expects only one character as dir separator (I don't use any NT server,
// this part of the code was not my idea).

OC::$SERVERROOT = str_replace("\\", '/', substr(__DIR__, 0, -4));
OC::$SUBURI = str_replace("\\", "/", substr(realpath($_SERVER["SCRIPT_FILENAME"]), strlen(OC::$SERVERROOT)));

// In this example, $documentRoot == '/var/www'

$documentRoot = realpath($_SERVER['DOCUMENT_ROOT']);

// If requesting /alias/dir/index.php/pathinfo or /alias/dir/index.php?param
// Then $scriptName == '/alias/dir/index.php'

$scriptName = $_SERVER["SCRIPT_NAME"];
if (substr($scriptName, -1) == '/') {
$scriptName .= 'index.php';
//make sure suburi follows the same rules as scriptName
if (substr(OC::$SUBURI, -9) != 'index.php') {
if (substr(OC::$SUBURI, -1) != '/') {
OC::$SUBURI = OC::$SUBURI . '/';
}
OC::$SUBURI = OC::$SUBURI . 'index.php';
}

// If requesting /alias/dir/index.php/pathinfo or /alias/dir/index.php?param
// Then $scriptFileName == '/var/www/dir/index.php'
// realpath() function is used here because previous __DIR__ call return implicitely real path
// We will compare later OC::$SERVERROOT and $scriptFileName, so we should not be disturbed
// by symlinks in file path

$scriptFileName = realpath($_SERVER["SCRIPT_FILENAME"]);

// If requesting /alias/dir/index.php/pathinfo
// Then $pathInfo == '/pathinfo'

if (isset($_SERVER["PATH_INFO"])) {
$pathInfo = $_SERVER["PATH_INFO"];
}
else {
$pathInfo = "";
}
$subDir = "";
$alias = "";

// If '/var/www' != '/var/www/dir'
// Then $subDir = substr('/var/www/dir', strlen('/var/www'))
// Then $subDir == '/dir'

if (strcmp($documentRoot, OC::$SERVERROOT)) {
$subDir = substr(OC::$SERVERROOT,strlen($documentRoot));
}

OC::$WEBROOT = substr($scriptName, 0, strlen($scriptName) - strlen(OC::$SUBURI));
// If '/var/www/dir' . '/alias/index.php' != '/var/www/dir/index.php' // True
// Then $alias = substr('/alias/index.php', 0, strlen('/var/www/dir') - strlen('/dir') - strlen('/var/www/dir/index.php'))
// Then $alias = substr('/alias/index.php', 0, strlen('/var/www/dir') - strlen('/var/www/dir/index.php'))
// Then $alias = substr('/alias/index.php', 0, 0 - strlen('/index.php'))
// Then $alias == '/alias

if (OC::$WEBROOT != '' and OC::$WEBROOT[0] !== '/') {
OC::$WEBROOT = '/' . OC::$WEBROOT;
if(strcmp(OC::$SERVERROOT.$scriptName, $scriptFileName)) {
$alias = substr($scriptName, 0, strlen(OC::$SERVERROOT) - strlen($subDir) - strlen($scriptFileName));
}

// If requesting /alias/dir/index.php
// Then OC::$WEBROOT = '/alias' . '/dir'
// Then OC::$WEBROOT = '/alias/dir'
// Else If no alias, or no subdir
// Then OC::$WEBROOT = ''

OC::$WEBROOT = $alias.$subDir;

// If requesting /alias/dir/index.php/pathinfo
// Then OC::$SUBURI = substr('/alias/dir/index.php', 1 + strlen('/alias')).'/pathinfo'
// Then OC::$SUBURI = substr('/alias/dir/index.php', strlen('/alias/')).'/pathinfo'
// Then OC::$SUBURI = 'dir/index.php'.'/pathinfo'
// Then OC::$SUBURI = 'dir/index.php/pathinfo'
// Then OC::$SUBURI = 'dir/index.php/pathinfo'
// Else If no subdir
// OC::$SUBURI = 'index.php/pathinfo'

OC::$SUBURI = substr($scriptName, 1 + strlen($alias)).$pathInfo;

// ensure we can find OC_Config
set_include_path(
OC::$SERVERROOT . '/lib' . PATH_SEPARATOR .
Expand Down