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511 lines
24 KiB
PHP
511 lines
24 KiB
PHP
<?php
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namespace App\Console\Commands;
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use Illuminate\Console\Command;
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use ZipArchive;
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use Illuminate\Support\Facades\Log;
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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 $line): string {
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// take into account the 'start of line or not' setting as an instance variable?
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// 'continuation' lines for a permitted statement are PERMITTED.
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// remove *only* line-feeds & carriage-returns; helpful for regexes against lines from
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// Windows dumps
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$line = trim($line, "\r\n");
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if($this->statement_is_permitted && $line[0] === ' ') {
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return $line . "\n"; //re-add the newline
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}
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$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 'permitted' block
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"/^\\(.*\\)[,;]$/" => false, //older MySQL dump style with one set of values per line
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/* we *could* have made the ^INSERT INTO blah VALUES$ turn on the capturing state, and closed it with
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a ^(blahblah);$ but it's cleaner to not have to manage the state machine. We're just going to
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assume that (blahblah), or (blahblah); are values for INSERT and are always acceptable. */
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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 $line . "\n"; //re-add newline
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}
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}
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// all that is not allowed is denied.
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return "";
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}
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//this is used in exactly *TWO* places, and in both cases should return a prefix I think?
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// first - if you do the --sanitize-only one (which is mostly for testing/development)
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// next - when you run *without* a guessed prefix, this is run first to figure out the prefix
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// I think we have to *duplicate* the call to be able to run it again?
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public static function guess_prefix($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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$check_tables = ['settings' => null, 'migrations' => null /* 'assets' => null */]; //TODO - move to statics?
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//can't use 'users' because the 'accessories_checkout' table?
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// can't use 'assets' because 'ver1_components_assets'
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foreach($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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* The name and signature of the console 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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{--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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{--sql-stdout-only : ONLY "Sanitize" the SQL and print it to stdout - useful for debugging - probably requires --sanitize-with-prefix= }';
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/**
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* The console command description.
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*
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* @var string
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*/
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protected $description = 'Restore from a previously created Snipe-IT backup file';
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/**
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* Create a new command instance.
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*
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* @return void
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*/
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public function __construct()
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{
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parent::__construct();
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}
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/**
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* Execute the console command.
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*
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* @return mixed
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*/
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public function handle()
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{
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$dir = getcwd();
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if( $dir != base_path() ) { // usually only the case when running via webserver, not via command-line
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Log::debug("Current working directory is: $dir, changing directory to: ".base_path());
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chdir(base_path()); // TODO - is this *safe* to change on a running script?!
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}
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//
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$filename = $this->argument('filename');
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if (! $filename) {
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return $this->error('Missing required filename');
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}
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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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if (config('database.default') != 'mysql') {
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return $this->error('DB_CONNECTION must be MySQL in order to perform a restore. Detected: '.config('database.default'));
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}
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$za = new ZipArchive();
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$errcode = $za->open($filename/* , ZipArchive::RDONLY */); // that constant only exists in PHP 7.4 and higher
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if ($errcode !== true) {
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$errors = [
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ZipArchive::ER_EXISTS => 'File already exists.',
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ZipArchive::ER_INCONS => 'Zip archive inconsistent.',
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ZipArchive::ER_INVAL => 'Invalid argument.',
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ZipArchive::ER_MEMORY => 'Malloc failure.',
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ZipArchive::ER_NOENT => 'No such file ('.$filename.') in directory '.$dir.'.',
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ZipArchive::ER_NOZIP => 'Not a zip archive.',
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ZipArchive::ER_OPEN => "Can't open file.",
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ZipArchive::ER_READ => 'Read error.',
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ZipArchive::ER_SEEK => 'Seek error.',
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];
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return $this->error('Could not access file: '.$filename.' - '.array_key_exists($errcode, $errors) ? $errors[$errcode] : " Unknown reason: $errcode");
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}
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$private_dirs = [
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'storage/private_uploads/accessories',
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'storage/private_uploads/assetmodels',
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'storage/private_uploads/assets', // these are asset _files_, not the pictures.
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'storage/private_uploads/audits',
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'storage/private_uploads/components',
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'storage/private_uploads/consumables',
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'storage/private_uploads/eula-pdfs',
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'storage/private_uploads/imports',
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'storage/private_uploads/licenses',
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'storage/private_uploads/signatures',
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'storage/private_uploads/users',
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];
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$private_files = [
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'storage/oauth-private.key',
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'storage/oauth-public.key',
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];
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$public_dirs = [
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'public/uploads/accessories',
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'public/uploads/assets', // these are asset _pictures_, not asset files
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'public/uploads/avatars',
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//'public/uploads/barcodes', // we don't want this, let the barcodes be regenerated
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'public/uploads/categories',
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'public/uploads/companies',
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'public/uploads/components',
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'public/uploads/consumables',
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'public/uploads/departments',
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'public/uploads/locations',
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'public/uploads/manufacturers',
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'public/uploads/models',
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'public/uploads/suppliers',
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];
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$public_files = [
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'public/uploads/logo.*',
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'public/uploads/setting-email_logo*',
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'public/uploads/setting-label_logo*',
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'public/uploads/setting-logo*',
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'public/uploads/favicon.*',
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'public/uploads/favicon-uploaded.*',
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];
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$all_files = $private_dirs + $public_dirs;
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$sqlfiles = [];
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$sqlfile_indices = [];
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$interesting_files = [];
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$boring_files = [];
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for ($i = 0; $i < $za->numFiles; $i++) {
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$stat_results = $za->statIndex($i);
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// echo "index: $i\n";
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// print_r($stat_results);
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$raw_path = $stat_results['name'];
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if (strpos($raw_path, '\\') !== false) { //found a backslash, swap it to forward-slash
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$raw_path = strtr($raw_path, '\\', '/');
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//print "Translating file: ".$stat_results['name']." to: ".$raw_path."\n";
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}
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// skip macOS resource fork files (?!?!?!)
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if (strpos($raw_path, '__MACOSX') !== false && strpos($raw_path, '._') !== false) {
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//print "SKIPPING macOS Resource fork file: $raw_path\n";
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$boring_files[] = $raw_path;
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continue;
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}
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if (@pathinfo($raw_path, PATHINFO_EXTENSION) == 'sql') {
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Log::debug("Found a sql file!");
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$sqlfiles[] = $raw_path;
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$sqlfile_indices[] = $i;
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continue;
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}
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foreach (array_merge($private_dirs, $public_dirs) as $dir) {
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$last_pos = strrpos($raw_path, $dir . '/');
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if ($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' => $i];
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continue 2;
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if ($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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//print("FOUND THE EXACT DIRECTORY: $dir AT: $raw_path!!!\n");
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}
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}
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}
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$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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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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$file = substr($file, 0, -1); //trim last character (which should be the wildcard)
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}
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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 ' . $raw_path . ' is being skipped');
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$boring_files[] = $raw_path;
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continue 2;
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}
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//print("INTERESTING - last_pos is $last_pos when searching $raw_path for $file - last_pos+strlen(\$file) is: ".($last_pos+strlen($file))." and strlen(\$rawpath) is: ".strlen($raw_path)."\n");
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//no wildcards found in $file, process 'normally'
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if ($last_pos + strlen($file) == strlen($raw_path) || $has_wildcard) { //again, no trailing slash. or this is a wildcard and we just take it.
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// print("FOUND THE EXACT FILE: $file AT: $raw_path!!!\n"); //we *do* care about this, though.
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$interesting_files[$raw_path] = ['dest' => dirname($file), 'index' => $i];
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continue 2;
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}
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}
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}
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$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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return $this->error('There should be exactly *one* sql backup file found, found: '.(count($sqlfiles) == 0 ? 'None' : implode(', ', $sqlfiles)));
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}
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if (strpos($sqlfiles[0], 'db-dumps') === false) {
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//return $this->error("SQL backup file is missing 'db-dumps' component of full pathname: ".$sqlfiles[0]);
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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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// If we're doing --sql-stdout-only, handle that now so we don't have to open pipes to mysql and all of that silliness
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if ($this->option('sql-stdout-only')) {
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$sql_importer = new SQLStreamer($sql_contents, STDOUT, $this->option('sanitize-with-prefix'));
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$bytes_read = $sql_importer->line_aware_piping();
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return $this->warn("$bytes_read total bytes read");
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//TODO - it'd be nice to dump this message to STDERR so that STDOUT is just pure SQL,
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// which would be good for redirecting to a file, and not having to trim the last line off of it
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}
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//how to invoke the restore?
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$pipes = [];
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$env_vars = getenv();
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$env_vars['MYSQL_PWD'] = config('database.connections.mysql.password');
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// TODO notes: we are stealing the dump_binary_path (which *probably* also has your copy of the mysql binary in it. But it might not, so we might need to extend this)
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// we unilaterally prepend a slash to the `mysql` command. This might mean your path could look like /blah/blah/blah//mysql - which should be fine. But maybe in some environments it isn't?
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$mysql_binary = config('database.connections.mysql.dump.dump_binary_path').\DIRECTORY_SEPARATOR.'mysql'.(\DIRECTORY_SEPARATOR == '\\' ? ".exe" : "");
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if( ! file_exists($mysql_binary) ) {
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return $this->error("mysql tool at: '$mysql_binary' does not exist, cannot restore. Please edit DB_DUMP_PATH in your .env to point to a directory that contains the mysqldump and mysql binary");
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}
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$proc_results = proc_open("$mysql_binary -h ".escapeshellarg(config('database.connections.mysql.host')).' -u '.escapeshellarg(config('database.connections.mysql.username')).' '.escapeshellarg(config('database.connections.mysql.database')), // yanked -p since we pass via ENV
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[0 => ['pipe', 'r'], 1 => ['pipe', 'w'], 2 => ['pipe', 'w']],
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$pipes,
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null,
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$env_vars); // this is not super-duper awesome-secure, but definitely more secure than showing it on the CLI, or dropping temporary files with passwords in them.
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if ($proc_results === false) {
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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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// $this->info("Stdout says? ".fgets($pipes[1])); //FIXME: I think we might need to set non-blocking mode to use this properly?
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// $this->info("Stderr says? ".fgets($pipes[2])); //FIXME: ditto, same.
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// should we read stdout?
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// fwrite($pipes[0],config("database.connections.mysql.password")."\n"); //this doesn't work :(
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//$sql_contents = fopen($sqlfiles[0], "r"); //NOPE! This isn't a real file yet, silly-billy!
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// FIXME - this feels like it wants to go somewhere else?
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// and it doesn't seem 'right' - if you can't get a stream to the .sql file,
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// why do we care what's happening with pipes and stdout and stderr?!
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if ($sql_contents === false) {
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$stdout = fgets($pipes[1]);
|
|
$this->info($stdout);
|
|
$stderr = fgets($pipes[2]);
|
|
$this->info($stderr);
|
|
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
if ( $this->option('sanitize-with-prefix') === null) {
|
|
// "Legacy" direct-piping
|
|
$bytes_read = 0;
|
|
while (($buffer = fgets($sql_contents, SQLStreamer::$buffer_size)) !== false) {
|
|
$bytes_read += strlen($buffer);
|
|
// Log::debug("Buffer is: '$buffer'");
|
|
$bytes_written = fwrite($pipes[0], $buffer);
|
|
|
|
if ($bytes_written === false) {
|
|
throw new Exception("Unable to write to pipe");
|
|
}
|
|
}
|
|
} else {
|
|
$sql_importer = new SQLStreamer($sql_contents, $pipes[0], $this->option('sanitize-with-prefix'));
|
|
$bytes_read = $sql_importer->line_aware_piping();
|
|
}
|
|
} catch (\Exception $e) {
|
|
Log::error("Error during restore!!!! ".$e->getMessage());
|
|
// FIXME - put these back and/or put them in the right places?!
|
|
$err_out = fgets($pipes[1]);
|
|
$err_err = fgets($pipes[2]);
|
|
Log::error("Error OUTPUT: ".$err_out);
|
|
$this->info($err_out);
|
|
Log::error("Error ERROR : ".$err_err);
|
|
$this->error($err_err);
|
|
throw $e;
|
|
}
|
|
if (!feof($sql_contents) || $bytes_read == 0) {
|
|
return $this->error("Not at end of file for sql file, or zero bytes read. aborting!");
|
|
}
|
|
|
|
fclose($pipes[0]);
|
|
fclose($sql_contents);
|
|
|
|
$this->line(stream_get_contents($pipes[1]));
|
|
fclose($pipes[1]);
|
|
|
|
$this->error(stream_get_contents($pipes[2]));
|
|
fclose($pipes[2]);
|
|
|
|
//wait, have to do fclose() on all pipes first?
|
|
$close_results = proc_close($proc_results);
|
|
if ($close_results != 0) {
|
|
return $this->error('There may have been a problem with the database import: Error number '.$close_results);
|
|
}
|
|
|
|
//and now copy the files over too (right?)
|
|
//FIXME - we don't prune the filesystem space yet!!!!
|
|
if ($this->option('no-progress')) {
|
|
$bar = null;
|
|
} else {
|
|
$bar = $this->output->createProgressBar(count($interesting_files));
|
|
}
|
|
foreach ($interesting_files as $pretty_file_name => $file_details) {
|
|
$ugly_file_name = $za->statIndex($file_details['index'])['name'];
|
|
$fp = $za->getStream($ugly_file_name);
|
|
//$this->info("Weird problem, here are file details? ".print_r($file_details,true));
|
|
if (!is_dir($file_details['dest'])) {
|
|
mkdir($file_details['dest'], 0755, true); //0755 is what Laravel uses, so we do that
|
|
}
|
|
$migrated_file = fopen($file_details['dest'].'/'.basename($pretty_file_name), 'w');
|
|
while (($buffer = fgets($fp, SQLStreamer::$buffer_size)) !== false) {
|
|
fwrite($migrated_file, $buffer);
|
|
}
|
|
fclose($migrated_file);
|
|
fclose($fp);
|
|
//$this->info("Wrote $ugly_file_name to $pretty_file_name");
|
|
if ($bar) {
|
|
$bar->advance();
|
|
}
|
|
}
|
|
if ($bar) {
|
|
$bar->finish();
|
|
$this->line('');
|
|
} else {
|
|
$this->info(count($interesting_files).' files were succesfully transferred');
|
|
}
|
|
foreach ($boring_files as $boring_file) {
|
|
$this->warn($boring_file.' was skipped.');
|
|
}
|
|
}
|
|
}
|