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https://github.com/snipe/snipe-it.git
synced 2024-12-25 05:34:06 -08:00
Merge remote-tracking branch 'origin/develop'
This commit is contained in:
snipe
commit
e5355db672
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@ -5,6 +5,151 @@ namespace App\Console\Commands;
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use Illuminate\Console\Command;
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use ZipArchive;
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class SQLStreamer {
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private $input;
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private $output;
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// embed the prefix here?
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public ?string $prefix;
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private bool $reading_beginning_of_line = true;
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public static $buffer_size = 1024 * 1024; // use a 1MB buffer, ought to work fine for most cases?
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public array $tablenames = [];
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private bool $should_guess = false;
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private bool $statement_is_permitted = false;
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public function __construct($input, $output, string $prefix = null)
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{
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$this->input = $input;
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$this->output = $output;
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$this->prefix = $prefix;
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}
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public function parse_sql(string $line): string {
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// take into account the 'start of line or not' setting as an instance variable?
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// 'continuation' lines for a permitted statement are PERMITTED.
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if($this->statement_is_permitted && $line[0] === ' ') {
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return $line;
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}
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$table_regex = '`?([a-zA-Z0-9_]+)`?';
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$allowed_statements = [
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"/^(DROP TABLE (?:IF EXISTS )?)`$table_regex(.*)$/" => false,
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"/^(CREATE TABLE )$table_regex(.*)$/" => true, //sets up 'continuation'
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"/^(LOCK TABLES )$table_regex(.*)$/" => false,
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"/^(INSERT INTO )$table_regex(.*)$/" => false,
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"/^UNLOCK TABLES/" => false,
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// "/^\\) ENGINE=InnoDB AUTO_INCREMENT=16 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;/" => false, // FIXME not sure what to do here?
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"/^\\)[a-zA-Z0-9_= ]*;$/" => false
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// ^^^^^^ that bit should *exit* the 'perimitted' black
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];
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foreach($allowed_statements as $statement => $statechange) {
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// $this->info("Checking regex: $statement...\n");
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$matches = [];
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if (preg_match($statement,$line,$matches)) {
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$this->statement_is_permitted = $statechange;
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// matches are: 1 => first part of the statement, 2 => tablename, 3 => rest of statement
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// (with of course 0 being "the whole match")
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if (@$matches[2]) {
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// print "Found a tablename! It's: ".$matches[2]."\n";
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if ($this->should_guess) {
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@$this->tablenames[$matches[2]] += 1;
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continue; //oh? FIXME
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} else {
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$cleaned_tablename = \DB::getTablePrefix().preg_replace('/^'.$this->prefix.'/','',$matches[2]);
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$line = preg_replace($statement,'$1`'.$cleaned_tablename.'`$3' , $line);
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}
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} else {
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// no explicit tablename in this one, leave the line alone
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}
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//how do we *replace* the tablename?
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// print "RETURNING LINE: $line";
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return $line;
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}
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}
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// all that is not allowed is denied.
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return "";
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}
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//this is used in exactly *TWO* places, and in both cases should return a prefix I think?
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// first - if you do the --sanitize-only one (which is mostly for testing/development)
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// next - when you run *without* a guessed prefix, this is run first to figure out the prefix
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// I think we have to *duplicate* the call to be able to run it again?
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public static function guess_prefix($input):string
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{
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$parser = new self($input, null);
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$parser->should_guess = true;
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$parser->line_aware_piping(); // <----- THIS is doing the heavy lifting!
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$check_tables = ['settings' => null, 'migrations' => null /* 'assets' => null */]; //TODO - move to statics?
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//can't use 'users' because the 'accessories_users' table?
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// can't use 'assets' because 'ver1_components_assets'
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foreach($check_tables as $check_table => $_ignore) {
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foreach ($parser->tablenames as $tablename => $_count) {
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// print "Comparing $tablename to $check_table\n";
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if (str_ends_with($tablename,$check_table)) {
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// print "Found one!\n";
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$check_tables[$check_table] = substr($tablename,0,-strlen($check_table));
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}
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}
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}
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$guessed_prefix = null;
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foreach ($check_tables as $clean_table => $prefix_guess) {
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if(is_null($prefix_guess)) {
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print("Couldn't find table $clean_table\n");
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die();
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}
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if(is_null($guessed_prefix)) {
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$guessed_prefix = $prefix_guess;
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} else {
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if ($guessed_prefix != $prefix_guess) {
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print("Prefix mismatch! Had guessed $guessed_prefix but got $prefix_guess\n");
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die();
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}
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}
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}
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return $guessed_prefix;
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}
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public function line_aware_piping(): int
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{
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$bytes_read = 0;
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if (! $this->input) {
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throw new \Exception("No Input available for line_aware_piping");
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}
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while (($buffer = fgets($this->input, SQLStreamer::$buffer_size)) !== false) {
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$bytes_read += strlen($buffer);
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if ($this->reading_beginning_of_line) {
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// \Log::debug("Buffer is: '$buffer'");
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$cleaned_buffer = $this->parse_sql($buffer);
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if ($this->output) {
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$bytes_written = fwrite($this->output, $cleaned_buffer);
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if ($bytes_written === false) {
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throw new \Exception("Unable to write to pipe");
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}
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}
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}
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// if we got a newline at the end of this, then the _next_ read is the beginning of a line
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if($buffer[strlen($buffer)-1] === "\n") {
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$this->reading_beginning_of_line = true;
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} else {
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$this->reading_beginning_of_line = false;
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}
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}
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return $bytes_read;
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}
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}
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class RestoreFromBackup extends Command
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{
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/**
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@ -12,10 +157,13 @@ class RestoreFromBackup extends Command
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*
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* @var string
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*/
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// FIXME - , stripping prefixes and nonstandard SQL statements. Without --prefix, guess and return the correct prefix to strip
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protected $signature = 'snipeit:restore
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{--force : Skip the danger prompt; assuming you enter "y"}
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{filename : The zip file to be migrated}
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{--no-progress : Don\'t show a progress bar}';
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{--no-progress : Don\'t show a progress bar}
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{--sanitize-guess-prefix : Guess and output the table-prefix needed to "sanitize" the SQL}
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{--sanitize-with-prefix= : "Sanitize" the SQL, using the passed-in table prefix (can be learned from --sanitize-guess-prefix). Pass as just \'--sanitize-with-prefix=\' to use no prefix}';
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/**
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* The console command description.
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@ -34,8 +182,6 @@ class RestoreFromBackup extends Command
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parent::__construct();
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}
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public static $buffer_size = 1024 * 1024; // use a 1MB buffer, ought to work fine for most cases?
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/**
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* Execute the console command.
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*
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@ -55,7 +201,7 @@ class RestoreFromBackup extends Command
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return $this->error('Missing required filename');
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}
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if (! $this->option('force') && ! $this->confirm('Are you sure you wish to restore from the given backup file? This can lead to MASSIVE DATA LOSS!')) {
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if (! $this->option('force') && ! $this->option('sanitize-guess-prefix') && ! $this->confirm('Are you sure you wish to restore from the given backup file? This can lead to MASSIVE DATA LOSS!')) {
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return $this->error('Data loss not confirmed');
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}
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@ -158,11 +304,11 @@ class RestoreFromBackup extends Command
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}
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foreach (array_merge($private_dirs, $public_dirs) as $dir) {
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$last_pos = strrpos($raw_path, $dir.'/');
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$last_pos = strrpos($raw_path, $dir . '/');
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if ($last_pos !== false) {
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//print("INTERESTING - last_pos is $last_pos when searching $raw_path for $dir - last_pos+strlen(\$dir) is: ".($last_pos+strlen($dir))." and strlen(\$rawpath) is: ".strlen($raw_path)."\n");
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//print("We would copy $raw_path to $dir.\n"); //FIXME append to a path?
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$interesting_files[$raw_path] = ['dest' =>$dir, 'index' => $i];
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$interesting_files[$raw_path] = ['dest' => $dir, 'index' => $i];
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continue 2;
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if ($last_pos + strlen($dir) + 1 == strlen($raw_path)) {
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// we don't care about that; we just want files with the appropriate prefix
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@ -171,7 +317,7 @@ class RestoreFromBackup extends Command
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}
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}
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$good_extensions = ['png', 'gif', 'jpg', 'svg', 'jpeg', 'doc', 'docx', 'pdf', 'txt',
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'zip', 'rar', 'xls', 'xlsx', 'lic', 'xml', 'rtf', 'webp', 'key', 'ico', ];
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'zip', 'rar', 'xls', 'xlsx', 'lic', 'xml', 'rtf', 'webp', 'key', 'ico',];
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foreach (array_merge($private_files, $public_files) as $file) {
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$has_wildcard = (strpos($file, '*') !== false);
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if ($has_wildcard) {
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@ -180,8 +326,8 @@ class RestoreFromBackup extends Command
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$last_pos = strrpos($raw_path, $file); // no trailing slash!
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if ($last_pos !== false) {
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$extension = strtolower(pathinfo($raw_path, PATHINFO_EXTENSION));
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if (! in_array($extension, $good_extensions)) {
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$this->warn('Potentially unsafe file '.$raw_path.' is being skipped');
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if (!in_array($extension, $good_extensions)) {
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$this->warn('Potentially unsafe file ' . $raw_path . ' is being skipped');
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$boring_files[] = $raw_path;
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continue 2;
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}
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@ -196,7 +342,6 @@ class RestoreFromBackup extends Command
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}
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$boring_files[] = $raw_path; //if we've gotten to here and haven't continue'ed our way into the next iteration, we don't want this file
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} // end of pre-processing the ZIP file for-loop
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// print_r($interesting_files);exit(-1);
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if (count($sqlfiles) != 1) {
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@ -208,6 +353,17 @@ class RestoreFromBackup extends Command
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//older Snipe-IT installs don't have the db-dumps subdirectory component
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}
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$sql_stat = $za->statIndex($sqlfile_indices[0]);
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//$this->info("SQL Stat is: ".print_r($sql_stat,true));
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$sql_contents = $za->getStream($sql_stat['name']); // maybe copy *THIS* thing?
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// OKAY, now that we *found* the sql file if we're doing just the guess-prefix thing, we can do that *HERE* I think?
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if ($this->option('sanitize-guess-prefix')) {
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$prefix = SQLStreamer::guess_prefix($sql_contents);
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$this->line($prefix);
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return $this->info("Re-run this command with '--sanitize-with-prefix=".$prefix."' to see an attempt to sanitze your SQL.");
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}
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//how to invoke the restore?
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$pipes = [];
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@ -228,6 +384,7 @@ class RestoreFromBackup extends Command
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return $this->error('Unable to invoke mysql via CLI');
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}
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// I'm not sure about these?
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stream_set_blocking($pipes[1], false); // use non-blocking reads for stdout
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stream_set_blocking($pipes[2], false); // use non-blocking reads for stderr
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@ -238,9 +395,9 @@ class RestoreFromBackup extends Command
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//$sql_contents = fopen($sqlfiles[0], "r"); //NOPE! This isn't a real file yet, silly-billy!
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$sql_stat = $za->statIndex($sqlfile_indices[0]);
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//$this->info("SQL Stat is: ".print_r($sql_stat,true));
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$sql_contents = $za->getStream($sql_stat['name']);
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// FIXME - this feels like it wants to go somewhere else?
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// and it doesn't seem 'right' - if you can't get a stream to the .sql file,
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// why do we care what's happening with pipes and stdout and stderr?!
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if ($sql_contents === false) {
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$stdout = fgets($pipes[1]);
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$this->info($stdout);
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@ -249,20 +406,27 @@ class RestoreFromBackup extends Command
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return false;
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}
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$bytes_read = 0;
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try {
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while (($buffer = fgets($sql_contents, self::$buffer_size)) !== false) {
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$bytes_read += strlen($buffer);
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// \Log::debug("Buffer is: '$buffer'");
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if ( $this->option('sanitize-with-prefix') === null) {
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// "Legacy" direct-piping
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$bytes_read = 0;
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while (($buffer = fgets($sql_contents, SQLStreamer::$buffer_size)) !== false) {
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$bytes_read += strlen($buffer);
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// \Log::debug("Buffer is: '$buffer'");
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$bytes_written = fwrite($pipes[0], $buffer);
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if ($bytes_written === false) {
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throw new Exception("Unable to write to pipe");
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if ($bytes_written === false) {
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throw new Exception("Unable to write to pipe");
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}
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}
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} else {
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$sql_importer = new SQLStreamer($sql_contents, $pipes[0], $this->option('sanitize-with-prefix'));
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$bytes_read = $sql_importer->line_aware_piping();
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}
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} catch (\Exception $e) {
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\Log::error("Error during restore!!!! ".$e->getMessage());
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// FIXME - put these back and/or put them in the right places?!
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$err_out = fgets($pipes[1]);
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$err_err = fgets($pipes[2]);
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\Log::error("Error OUTPUT: ".$err_out);
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@ -271,7 +435,6 @@ class RestoreFromBackup extends Command
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$this->error($err_err);
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throw $e;
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}
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if (!feof($sql_contents) || $bytes_read == 0) {
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return $this->error("Not at end of file for sql file, or zero bytes read. aborting!");
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}
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@ -303,7 +466,7 @@ class RestoreFromBackup extends Command
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$fp = $za->getStream($ugly_file_name);
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//$this->info("Weird problem, here are file details? ".print_r($file_details,true));
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$migrated_file = fopen($file_details['dest'].'/'.basename($pretty_file_name), 'w');
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while (($buffer = fgets($fp, self::$buffer_size)) !== false) {
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while (($buffer = fgets($fp, SQLStreamer::$buffer_size)) !== false) {
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fwrite($migrated_file, $buffer);
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}
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fclose($migrated_file);
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@ -77,7 +77,8 @@
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"watson/validating": "^6.1"
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},
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"suggest": {
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"ext-ldap": "*"
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"ext-ldap": "*",
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"ext-zip": "*"
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},
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"require-dev": {
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"brianium/paratest": "^6.6",
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