Initial checkin of resolver.php

Signed-off-by: Diederik de Groot <ddegroot@talon.nl>
2020-02-15 19:30:00 +01:00
parent d5bdcd4c30
commit 2d7f939949
1 changed files with 117 additions and 0 deletions
--- a/tftpboot/resolver.php
+++ b/tftpboot/resolver.php
@@ -0,0 +1,117 @@
+#!/usr/bin/php
+<?php
+$CACHEFILE_NAME="/tmp/provision_sccp_resolver.cache";
+
+/* Todo:
+ - setup logging
+ - read config.file
+ - improve error handling
+ - secure urlencoding/urldecoding
+ - don't allow browsing
+ - check source ip-range
+ - check HTTPHeader for known BrowserTypes
+*/
+
+class Resolver {
+	private $isDirty = FALSE;
+	private $cache = array();
+	function __construct() {
+		if(file_exists($GLOBALS["CACHEFILE_NAME"])) {
+	 		$this->cache = unserialize(file_get_contents($GLOBALS["CACHEFILE_NAME"])); 
+		} else {
+			$this->buildCleanCache();
+		}
+	}
+	function __destruct() {
+		//print_r($this->cache);
+		if ($this->isDirty) {
+			if($f = @fopen($GLOBALS["CACHEFILE_NAME"],"w")) {
+				//if(@fwrite($f,serialize(get_object_vars($this))))
+				if(@fwrite($f,serialize($this->cache))) {
+		   		  	@fclose($f);
+				}
+			} else
+        	        	die("Could not write to file ".$GLOBALS["CACHEFILE_NAME"]." at Resolver::destruct");
+		}
+	}
+	function searchForFile($filename) {
+		foreach(["settings","wallpapers","ringtones","locales/countries","locales/languages"] as $subdir) {
+			$path = "$subdir/$filename";
+			if (file_exists($path)) {
+				 $this-> addFile($filename, $path);
+				 return $path;
+			}
+		}
+		throw new Exception("File '$request' does not exist");
+	}
+	function buildCleanCache() {
+		// Intelligently walk tree
+		$currentdir=getcwd();
+		//foreach(["firmware","ringtones","settings"] as $subdir) {
+		foreach(["firmware","ringtones"] as $subdir) {
+			$dir_iterator = new RecursiveDirectoryIterator("$currentdir/$subdir");
+			$iterator = new RecursiveIteratorIterator($dir_iterator, RecursiveIteratorIterator::SELF_FIRST);
+			foreach ($iterator as $file) {
+				if ($file->isFile()) {
+					$this->addFile($file->getFileName(), $file->getPathname());
+				}
+			}
+		}
+		foreach(["locales/languages", "locales/countries", "wallpapers"] as $subdir) {
+			$dir_iterator = new RecursiveDirectoryIterator("$currentdir/$subdir");
+			$iterator = new RecursiveIteratorIterator($dir_iterator, RecursiveIteratorIterator::SELF_FIRST);
+			foreach ($iterator as $file) {
+				if ($file->isFile()) {
+					$path = basename(dirname($file->getPathname()));
+					$this->addFile("$path/".$file->getFileName(), $file->getPathname());
+				}
+			}
+		}
+		$this->isDirty  = TRUE;
+	}
+	function addFile($hash, $path) {
+		//echo "Rdding $hash\n";
+		$this->cache[$hash] = $path;
+		$this->isDirty  =TRUE;
+	}
+	function removeFile($hash) {
+		//echo "Removing $hash\n";
+		unset($this->cache[$hash]);
+		$this->isDirty = TRUE;
+	}
+	function resolve($request) /* canthrow */ {
+		$path = "";
+		if (array_key_exists($request, $this->cache)) {
+			if ($path = $this->cache[$request]) {
+				if (!stat($path)) {
+					 $this->removeFile($request);
+					 throw new Exception("File '$request' does not exist on FS");
+				}
+				return $path;
+			}
+		}
+		if ($this->searchForFile($request)) {
+			return $this->cache[$request];
+		}
+		return $path;
+	}
+}
+
+$resolver = new Resolver();
+try {
+	print($resolver->resolve("jar70sccp.9-4-2ES26.sbn")."\n");
+	print($resolver->resolve("Russian_Russian_Federation/be-sccp.jar")."\n");
+	print($resolver->resolve("Spain/g3-tones.xml")."\n");
+	print($resolver->resolve("320x196x4/Chan-SCCP-b.png")."\n");
+} catch (Exception $e) {
+	print($e . "\n");
+}
+try {
+	print($resolver->resolve("XMLDefault.cnf.xml")."\n");
+} catch (Exception $e) {
+	print($e . "\n");
+}
+
+unset($resolver);
+#unlink($CACHEFILE_NAME);
+?>