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(PHP ActiveX) SFTP Upload Large File in PartsSee more SFTP ExamplesDemonstrates how to split a large file into N parts and then upload each part separately. This technique can be used to potentially avoid limits a SFTP server might impose on upload file size.
<?php // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.SFtp') $sftp = new COM("Chilkat.SFtp"); // Set some timeouts, in milliseconds: $sftp->ConnectTimeoutMs = 5000; $sftp->IdleTimeoutMs = 10000; // Connect to the SSH server. // The standard SSH port = 22 // The hostname may be a hostname or IP address. $hostname = 'sftp.example.com'; $port = 22; $success = $sftp->Connect($hostname,$port); if ($success != 1) { print $sftp->LastErrorText . "\n"; exit; } // Authenticate with the SSH server. Chilkat SFTP supports // both password-based authenication as well as public-key // authentication. This example uses password authenication. $success = $sftp->AuthenticatePw('myLogin','myPassword'); if ($success != 1) { print $sftp->LastErrorText . "\n"; exit; } // After authenticating, the SFTP subsystem must be initialized: $success = $sftp->InitializeSftp(); if ($success != 1) { print $sftp->LastErrorText . "\n"; exit; } // Open a remote file for writing on the SSH server. // If the file already exists, it is overwritten. // (Specify "createNew" instead of "createTruncate" to // prevent overwriting existing files.) $handle = $sftp->openFile('big.zip','writeOnly','createTruncate'); if ($sftp->LastMethodSuccess != 1) { print $sftp->LastErrorText . "\n"; exit; } // We're going to upload the local file "qa_data/zips/big.zip" (a relative local path from our current working directory) // to the SFTP server. $localFilePath = 'qa_data/zips/big.zip'; // Rather than uploading in one shot, we'll read the local file in chunks // and upload a chunk at a time. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.FileAccess') $fac = new COM("Chilkat.FileAccess"); $success = $fac->OpenForRead($localFilePath); if ($success == 0) { $sftp->CloseHandle($handle); print $fac->LastErrorText . "\n"; exit; } // If we were to split the local file into 128K chunks, how many chunks (blocks) would // we have, including the last partial block? $blockSize = 131072; $numBlocks = $fac->GetNumBlocks($blockSize); print 'Number of blocks = ' . $numBlocks . "\n"; // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData') $bd = new COM("Chilkat.BinData"); $i = 0; while ($i < $numBlocks) { // Read the Nth block, which gets appended to the bd. (which means // we must clear the contents of bd before the next iteration) $success = $fac->ReadBlockBd($i,$blockSize,$bd); if ($success == 0) { $sftp->CloseHandle($handle); print $fac->LastErrorText . "\n"; exit; } // Upload this block to the open remote file. $success = $sftp->WriteFileBd($handle,$bd); if ($success == 0) { print $sftp->LastErrorText . "\n"; exit; } // Clear the contents for the next iteration. $bd->Clear(); $i = $i + 1; } // Close the local file. $fac->FileClose(); // ----------------------------------------------------------------------------- // This is important. You must close the handle on the server. // Otherwise open handles will accumulate on the server until eventually a limit // is reached and the server will fail on a call to OpenFile. // ----------------------------------------------------------------------------- // Close the remote file handle on the server. $success = $sftp->CloseHandle($handle); if ($success != 1) { print $sftp->LastErrorText . "\n"; exit; } print 'Success.' . "\n"; ?> |
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