Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(PHP ActiveX) S3 Resume DownloadSuppose an S3 download of a very large file failed for some reason and you have a partial file on disk. Rather than restart the entire download, you wish to download the remaining portion. This example demonstrates how to finish a previously failed download. Note: This example requires Chilkat v9.5.0.83 or above.
<?php // This example requires 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.Rest') $rest = new COM("Chilkat.Rest"); // Connect to the Amazon AWS REST server. $bTls = 1; $port = 443; $bAutoReconnect = 1; $success = $rest->Connect('s3.amazonaws.com',$port,$bTls,$bAutoReconnect); // --------------------------------------------------------------------------- // Important: For buckets created in regions outside us-east-1, // there are three important changes that need to be made. // See Working with S3 Buckets in Non-us-east-1 Regions for the details. // --------------------------------------------------------------------------- // Provide AWS credentials for the REST call. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.AuthAws') $authAws = new COM("Chilkat.AuthAws"); $authAws->AccessKey = 'AWS_ACCESS_KEY'; $authAws->SecretKey = 'AWS_SECRET_KEY'; $authAws->ServiceName = 's3'; $success = $rest->SetAuthAws($authAws); // Set the bucket name via the HOST header. // In this case, the bucket name is "chilkat100". $rest->Host = 'chilkat100.s3.amazonaws.com'; // We want to continue downloading a file. // The relative local filepath of our previously partially downoaded file is: qa_output/hamlet.xml // Let's find out how many bytes are already downloaded. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.FileAccess') $fac = new COM("Chilkat.FileAccess"); $localFilepath = 'qa_output/hamlet.xml'; // Note: The FileSize method returns a signed 32-bit integer. If the file is potentially larger than 2GB, call FileSizeStr instead to return // the size of the file as a string, then convert to an integer value. $sz = $fac->FileSize($localFilepath); if ($sz > 0) { print 'sz = ' . $sz . "\n"; // If the sz equals 42375 bytes, then we want to add a Range header that looks like this: // Range: bytes=42375- // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbRange = new COM("Chilkat.StringBuilder"); $sbRange->Append('bytes='); $sbRange->AppendInt($sz); $sbRange->Append('-'); $rest->AddHeader('Range',$sbRange->getAsString()); print 'Added Range: ' . $sbRange->getAsString() . "\n"; } // Send the request to download the remainder of the file. $success = $rest->SendReqNoBody('GET','/hamlet.xml'); if ($success != 1) { print $rest->LastErrorText . "\n"; exit; } // Read the response header. $responseStatusCode = $rest->ReadResponseHeader(); if ($responseStatusCode < 0) { print $rest->LastErrorText . "\n"; exit; } print 'Response status code = ' . $responseStatusCode . "\n"; // We expect a 200 or 206 response status if the file data is coming. // Otherwise, we'll get a string response body with an error message(or no response body). if (($responseStatusCode == 200) or ($responseStatusCode == 206)) { // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Stream') $bodyStream = new COM("Chilkat.Stream"); // The stream's sink will be a file. // We will append to the file.. $bodyStream->SinkFile = $localFilepath; // Indicate that we wish to append to the output file. // The SinkFileAppend property was added in Chilkat v9.50.83 $bodyStream->SinkFileAppend = 1; // Read the response body to the stream. Given that we've // set the stream's sink to a file, it will stream directly // to the file. $success = $rest->ReadRespBodyStream($bodyStream,1); if ($success != 1) { print $rest->LastErrorText . "\n"; exit; } print 'Successfully downloaded the file.' . "\n"; } else { $errResponse = $rest->readRespBodyString(); if ($rest->LastMethodSuccess != 1) { print $rest->LastErrorText . "\n"; } else { print $errResponse . "\n"; } } ?> |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.