update

wp-content/plugins/wpvivid-backuprestore/includes/customclass/class-wpvivid-extend-sftp.php

@@ -0,0 +1,144 @@
+<?php
+
+if (!defined('WPVIVID_PLUGIN_DIR')){
+    die;
+}
+include_once WPVIVID_PLUGIN_DIR.'/vendor/autoload.php';
+class WPvivid_Net_SFTP extends Net_SFTP
+{
+    function get($remote_file, $local_file = false, $offset = 0, $length = -1, $callback = null)
+    {
+        if (!($this->bitmap & NET_SSH2_MASK_LOGIN)) {
+            return false;
+        }
+
+        $remote_file = $this->_realpath($remote_file);
+        if ($remote_file === false) {
+            return false;
+        }
+
+        $packet = pack('Na*N2', strlen($remote_file), $remote_file, NET_SFTP_OPEN_READ, 0);
+        if (!$this->_send_sftp_packet(NET_SFTP_OPEN, $packet)) {
+            return false;
+        }
+
+        $response = $this->_get_sftp_packet();
+        switch ($this->packet_type) {
+            case NET_SFTP_HANDLE:
+                $handle = substr($response, 4);
+                break;
+            case NET_SFTP_STATUS:
+                $this->_logError($response);
+                return false;
+            default:
+                user_error('Expected SSH_FXP_HANDLE or SSH_FXP_STATUS');
+                return false;
+        }
+
+        if (is_resource($local_file)) {
+            $fp = $local_file;
+            $stat = fstat($fp);
+            $res_offset = $stat['size'];
+        } else {
+            $res_offset = 0;
+            if ($local_file !== false) {
+                $fp = fopen($local_file, 'wb');
+                if (!$fp) {
+                    return false;
+                }
+            } else {
+                $content = '';
+            }
+        }
+
+        $fclose_check = $local_file !== false && !is_resource($local_file);
+
+        $start = $offset;
+        $read = 0;
+        while (true) {
+            $i = 0;
+
+            while ($i < NET_SFTP_QUEUE_SIZE && ($length < 0 || $read < $length)) {
+                $tempoffset = $start + $read;
+
+                $packet_size = $length > 0 ? min($this->max_sftp_packet, $length - $read) : $this->max_sftp_packet;
+                $packet = pack('Na*N3', strlen($handle), $handle, $tempoffset / 4294967296, $tempoffset, $packet_size);
+                if (!$this->_send_sftp_packet(NET_SFTP_READ, $packet)) {
+                    if ($fclose_check) {
+                        fclose($fp);
+                    }
+                    return false;
+                }
+                $packet = null;
+                $read+= $packet_size;
+                $i++;
+            }
+
+            if (!$i) {
+                break;
+            }
+
+            $clear_responses = false;
+            while ($i > 0) {
+                $i--;
+
+                if ($clear_responses) {
+                    $this->_get_sftp_packet();
+                    continue;
+                } else {
+                    $response = $this->_get_sftp_packet();
+                }
+
+                switch ($this->packet_type) {
+                    case NET_SFTP_DATA:
+                        $temp = substr($response, 4);
+                        $offset+= strlen($temp);
+                        if ($local_file === false) {
+                            $content.= $temp;
+                        } else {
+                            fputs($fp, $temp);
+                        }
+
+                        if( is_callable($callback)){
+                            call_user_func_array($callback,array($offset));
+                        }
+
+                        $temp = null;
+                        break;
+                    case NET_SFTP_STATUS:
+                        $this->_logError($response);
+                        $clear_responses = true;
+                        break;
+                    default:
+                        if ($fclose_check) {
+                            fclose($fp);
+                        }
+                        user_error('Expected SSH_FX_DATA or SSH_FXP_STATUS');
+                }
+                $response = null;
+            }
+
+            if ($clear_responses) {
+                break;
+            }
+        }
+
+        if ($length > 0 && $length <= $offset - $start) {
+            if ($local_file === false) {
+                $content = substr($content, 0, $length);
+            } else {
+                ftruncate($fp, $length + $res_offset);
+            }
+        }
+
+        if ($fclose_check) {
+            fclose($fp);
+        }
+
+        if (!$this->_close_handle($handle)) {
+            return false;
+        }
+
+        return isset($content) ? $content : true;
+    }
+}