這篇文章主要介紹了php微信小程序解包過程實例詳解,本文通過實例代碼給大家介紹的非常詳細，對大家的學習或工作具有一定的參考借鑒價值，需要的朋友可以參考下
這個解包只能看個大概
1、找到小程序壓縮包
1.1、手機root或安裝模擬器(我用的是夜神)
1.2、在模擬器上安裝微信(用android5系統的模擬器，低版本小程序容易打不開)
1.3、打開登陸微信后，打開小程序
1.4、打開模擬器自帶的文件管理器來到目錄：/data/data/com.tencent.mm/MicroMsg/{{一串32位的16進制字符串文件夾}}/appbrand/pkg/
1.5、里面有很多wxapkg文件，找到最新修改日期的文件比如 -357038350_91.wxapkg，前面打勾選中
1.6、文件管理器回到/mnt/shared/Other目錄，粘貼即可，打開安卓模擬器上我的電腦 =〉打開電腦文件夾找到粘貼的文件-357038350_91.wxapkg 夜神教程鏈接：跳轉查看
2、對壓縮包解包
詳細參考：https://codechina.csdn.net/mirrors/leo9960/wechat-app-unpack?utm_source=csdn_github_accelerator
我用的php類：
使用方法：cmd =>cd php文件目錄 =〉php wx_unpak.php 357038350_91.wxapkg
我主要是想用其中的一些圖片，很多圖片都被base64了放到js(app-service.js)和樣式(app-wxss.js)文件中了；需要我們匹配組裝一下
<?php
$str = file_get_contents('_-357038350_97.wxapkg.unpacked/app-service.js');
$preg = '/(data:image.*?)\"/';
$len = strlen('data:image/png;base64,');
if(preg_match_all($preg, $str, $arr)){
foreach($arr[1] as $k => $img){
file_put_contents('./images/'.$k.'.png',base64_decode(substr($img,$len)));
//echo substr($img,$len);exit;
}
} else {
echo 'no';
}
$str = file_get_contents('_-357038350_97.wxapkg.unpacked/app-wxss.js');
$preg = '/\((data:image.*?)\)/';
$len = strlen('data:image/png;base64,');
if(preg_match_all($preg, $str, $arr)){
foreach($arr[1] as $k => $img){
file_put_contents('./images/a2_'.$k.'.png',base64_decode(substr($img,$len)));
//echo substr($img,$len);exit;
}
} else {
echo 'no';
}wx_unpak.php
<?php
/**
* 源文件目錄
* /data/data/com.tencent.mm/MicroMsg/{{一串32位的16進制字符串文件夾}}/appbrand/pkg/
* /data/data/com.eg.android.AlipayGphone, 在files/nebulaInstallApps/目錄下存儲了所有加載過的小程序
* [php] /path/to/unpack-wxapkg.php <xxx.wxapkg>
* php unpak.php _1123949441_351.wxapkg
**/
function unpack_wxapkg($file, $targetDir)
{
if (!is_dir($targetDir)){
mkdir($targetDir);
}
echo "Reading file.\n";
$file = file_get_contents($file);
$ptr = 18;
$headerStruct = new StructDef([
'mask1' => 'ushort',
'info1' => 'ulong',
'indexInfoLength' => 'ulong',
'bodyInfoLength' => 'ushort',
'mask2' => 'ushort',
'fileCount' => 'ulong',
]);
echo "Parsing file header...\n";
$header = $headerStruct->unpack($file);
// print_r(['header' => $header]);
$unpackULong = function () use (&$file, &$ptr) {
$ret = unpack_ulong(substr($file, $ptr, 4));
$ptr += 4;
return $ret;
};
$unpackUShort = function () use (&$file, &$ptr) {
$ret = unpack_ushort(substr($file, $ptr, 2));
$ptr += 2;
return $ret;
};
$unpackStr = function ($len) use (&$file, &$ptr) {
$ret = substr($file, $ptr, $len);
$ptr += $len;
return $ret;
};
$fileCount = $header['fileCount'];
echo "Got $fileCount files.\n";
$unpackedFiles = [];
for ($i = 0; $i < $fileCount; $i++) {
$nameLength = $unpackULong();
$f = [
'nameLength' => $nameLength,
'name' => $unpackStr($nameLength),
'offset' => $unpackULong(),
'size' => $unpackULong(),
];
echo "Unpacking file {$f['name']} ({$f['size']}bytes)...\n";
$f['content'] = substr($file, $f['offset'], $f['size']);
$unpackedFiles[] = $f;
$destFile = $targetDir . $f['name'];
$destDir = dirname($destFile);
if (!is_dir($destDir)){
mkdir($destDir, 0777, true);
}
file_put_contents($targetDir . $f['name'], $f['content']);
}
// print_r(['unpackedFiles' => $unpackedFiles]);
echo "All done.\n";
}
function unpack_ulong($str)
{
$x = unpack('N', $str);
return $x[1];
}
function unpack_ushort($str)
{
$x = unpack('n', $str);
return $x[1];
}
class StructDef
{
protected $def;
protected $unpackFormat;
public function __construct($def)
{
$this->def = $def;
$this->unpackFormat = self::convertStructDefToUnpackFormat($def);
}
public function unpack($data)
{
return unpack($this->unpackFormat, $data);
}
protected static function convertStructDefToUnpackFormat($def)
{
$defTypeToUnpackType = [
'byte' => 'C',
'uchar' => 'C',
'u8' => 'C',
'ushort' => 'n',
'u16' => 'n',
'ulong' => 'N',
'u32' => 'N',
];
$ret = [];
foreach ($def as $key => $type) {
$ret[] = $defTypeToUnpackType[$type] . $key;
}
return implode('/', $ret);
}
}
$packageFile = $argv[1];
//支持目錄下文件批量解壓
if (is_dir($packageFile)){
$handle = opendir($packageFile);
if($handle){
while(($fl = readdir($handle)) !== false){
$temp = $packageFile.DIRECTORY_SEPARATOR.$fl;
//如果不加 $fl!='.' && $fl != '..' 則會造成把$dir的父級目錄也讀取出來
if(is_file($temp)){
if($fl!='.' && $fl != '..'){
$targetDir = $temp . '.unpacked';
unpack_wxapkg($temp, $targetDir);
}
}
}
}
}else if (is_file($packageFile)){
$targetDir = $packageFile . '.unpacked';
unpack_wxapkg($packageFile, $targetDir);
}else{
echo <<<HELP
Usage:
[php] {$argv[0]} <xxx.wxapkg>
- Unpack the `xxx.wxapkg` to `xxx.wxapkg.unpacked` directory.
HELP;
exit(1);
}
exit(0);
