grandes avances previos al primer deployment en reevo.wiki

1 files changed, 222 insertions, 0 deletions

diff --git a/www/wiki/img_auth.php b/www/wiki/img_auth.php
new file mode 100644
index 00000000..20528090
--- /dev/null
+++ b/www/wiki/img_auth.php
@@ -0,0 +1,222 @@
+<?php
+/**
+ * Image authorisation script
+ *
+ * To use this, see https://www.mediawiki.org/wiki/Manual:Image_Authorization
+ *
+ * - Set $wgUploadDirectory to a non-public directory (not web accessible)
+ * - Set $wgUploadPath to point to this file
+ *
+ * Optional Parameters
+ *
+ * - Set $wgImgAuthDetails = true if you want the reason the access was denied messages to
+ *       be displayed instead of just the 403 error (doesn't work on IE anyway),
+ *       otherwise it will only appear in error logs
+ *
+ *  For security reasons, you usually don't want your user to know *why* access was denied,
+ *  just that it was. If you want to change this, you can set $wgImgAuthDetails to 'true'
+ *  in localsettings.php and it will give the user the reason why access was denied.
+ *
+ * Your server needs to support PATH_INFO; CGI-based configurations usually don't.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+define( 'MW_NO_OUTPUT_COMPRESSION', 1 );
+require __DIR__ . '/includes/WebStart.php';
+
+# Set action base paths so that WebRequest::getPathInfo()
+# recognizes the "X" as the 'title' in ../img_auth.php/X urls.
+$wgArticlePath = false; # Don't let a "/*" article path clober our action path
+$wgActionPaths = [ "$wgUploadPath/" ];
+
+wfImageAuthMain();
+
+$mediawiki = new MediaWiki();
+$mediawiki->doPostOutputShutdown( 'fast' );
+
+function wfImageAuthMain() {
+	global $wgImgAuthUrlPathMap;
+
+	$request = RequestContext::getMain()->getRequest();
+	$publicWiki = in_array( 'read', User::getGroupPermissions( [ '*' ] ), true );
+
+	// Get the requested file path (source file or thumbnail)
+	$matches = WebRequest::getPathInfo();
+	if ( !isset( $matches['title'] ) ) {
+		wfForbidden( 'img-auth-accessdenied', 'img-auth-nopathinfo' );
+		return;
+	}
+	$path = $matches['title'];
+	if ( $path && $path[0] !== '/' ) {
+		// Make sure $path has a leading /
+		$path = "/" . $path;
+	}
+
+	// Check for T30235: QUERY_STRING overriding the correct extension
+	$whitelist = [];
+	$extension = FileBackend::extensionFromPath( $path, 'rawcase' );
+	if ( $extension != '' ) {
+		$whitelist[] = $extension;
+	}
+	if ( !$request->checkUrlExtension( $whitelist ) ) {
+		return;
+	}
+
+	// Various extensions may have their own backends that need access.
+	// Check if there is a special backend and storage base path for this file.
+	foreach ( $wgImgAuthUrlPathMap as $prefix => $storageDir ) {
+		$prefix = rtrim( $prefix, '/' ) . '/'; // implicit trailing slash
+		if ( strpos( $path, $prefix ) === 0 ) {
+			$be = FileBackendGroup::singleton()->backendFromPath( $storageDir );
+			$filename = $storageDir . substr( $path, strlen( $prefix ) ); // strip prefix
+			// Check basic user authorization
+			if ( !RequestContext::getMain()->getUser()->isAllowed( 'read' ) ) {
+				wfForbidden( 'img-auth-accessdenied', 'img-auth-noread', $path );
+				return;
+			}
+			if ( $be->fileExists( [ 'src' => $filename ] ) ) {
+				wfDebugLog( 'img_auth', "Streaming `" . $filename . "`." );
+				$be->streamFile( [ 'src' => $filename ],
+					[ 'Cache-Control: private', 'Vary: Cookie' ] );
+			} else {
+				wfForbidden( 'img-auth-accessdenied', 'img-auth-nofile', $path );
+			}
+			return;
+		}
+	}
+
+	// Get the local file repository
+	$repo = RepoGroup::singleton()->getRepo( 'local' );
+	$zone = strstr( ltrim( $path, '/' ), '/', true );
+
+	// Get the full file storage path and extract the source file name.
+	// (e.g. 120px-Foo.png => Foo.png or page2-120px-Foo.png => Foo.png).
+	// This only applies to thumbnails/transcoded, and each of them should
+	// be under a folder that has the source file name.
+	if ( $zone === 'thumb' || $zone === 'transcoded' ) {
+		$name = wfBaseName( dirname( $path ) );
+		$filename = $repo->getZonePath( $zone ) . substr( $path, strlen( "/" . $zone ) );
+		// Check to see if the file exists
+		if ( !$repo->fileExists( $filename ) ) {
+			wfForbidden( 'img-auth-accessdenied', 'img-auth-nofile', $filename );
+			return;
+		}
+	} else {
+		$name = wfBaseName( $path ); // file is a source file
+		$filename = $repo->getZonePath( 'public' ) . $path;
+		// Check to see if the file exists and is not deleted
+		$bits = explode( '!', $name, 2 );
+		if ( substr( $path, 0, 9 ) === '/archive/' && count( $bits ) == 2 ) {
+			$file = $repo->newFromArchiveName( $bits[1], $name );
+		} else {
+			$file = $repo->newFile( $name );
+		}
+		if ( !$file->exists() || $file->isDeleted( File::DELETED_FILE ) ) {
+			wfForbidden( 'img-auth-accessdenied', 'img-auth-nofile', $filename );
+			return;
+		}
+	}
+
+	$headers = []; // extra HTTP headers to send
+
+	if ( !$publicWiki ) {
+		// For private wikis, run extra auth checks and set cache control headers
+		$headers[] = 'Cache-Control: private';
+		$headers[] = 'Vary: Cookie';
+
+		$title = Title::makeTitleSafe( NS_FILE, $name );
+		if ( !$title instanceof Title ) { // files have valid titles
+			wfForbidden( 'img-auth-accessdenied', 'img-auth-badtitle', $name );
+			return;
+		}
+
+		// Run hook for extension authorization plugins
+		/** @var $result array */
+		$result = null;
+		if ( !Hooks::run( 'ImgAuthBeforeStream', [ &$title, &$path, &$name, &$result ] ) ) {
+			wfForbidden( $result[0], $result[1], array_slice( $result, 2 ) );
+			return;
+		}
+
+		// Check user authorization for this title
+		// Checks Whitelist too
+		if ( !$title->userCan( 'read' ) ) {
+			wfForbidden( 'img-auth-accessdenied', 'img-auth-noread', $name );
+			return;
+		}
+	}
+
+	$options = []; // HTTP header options
+	if ( isset( $_SERVER['HTTP_RANGE'] ) ) {
+		$options['range'] = $_SERVER['HTTP_RANGE'];
+	}
+	if ( isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
+		$options['if-modified-since'] = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
+	}
+
+	if ( $request->getCheck( 'download' ) ) {
+		$headers[] = 'Content-Disposition: attachment';
+	}
+
+	// Stream the requested file
+	wfDebugLog( 'img_auth', "Streaming `" . $filename . "`." );
+	$repo->streamFile( $filename, $headers, $options );
+}
+
+/**
+ * Issue a standard HTTP 403 Forbidden header ($msg1-a message index, not a message) and an
+ * error message ($msg2, also a message index), (both required) then end the script
+ * subsequent arguments to $msg2 will be passed as parameters only for replacing in $msg2
+ * @param string $msg1
+ * @param string $msg2
+ */
+function wfForbidden( $msg1, $msg2 ) {
+	global $wgImgAuthDetails;
+
+	$args = func_get_args();
+	array_shift( $args );
+	array_shift( $args );
+	$args = ( isset( $args[0] ) && is_array( $args[0] ) ) ? $args[0] : $args;
+
+	$msgHdr = wfMessage( $msg1 )->escaped();
+	$detailMsgKey = $wgImgAuthDetails ? $msg2 : 'badaccess-group0';
+	$detailMsg = wfMessage( $detailMsgKey, $args )->escaped();
+
+	wfDebugLog( 'img_auth',
+		"wfForbidden Hdr: " . wfMessage( $msg1 )->inLanguage( 'en' )->text() . " Msg: " .
+			wfMessage( $msg2, $args )->inLanguage( 'en' )->text()
+	);
+
+	HttpStatus::header( 403 );
+	header( 'Cache-Control: no-cache' );
+	header( 'Content-Type: text/html; charset=utf-8' );
+	echo <<<ENDS
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8" />
+<title>$msgHdr</title>
+</head>
+<body>
+<h1>$msgHdr</h1>
+<p>$detailMsg</p>
+</body>
+</html>
+ENDS;
+}