Chilkat Examples

ChilkatHOME.NET Core C#Android™AutoItCC#C++Chilkat2-PythonCkPythonClassic ASPDataFlexDelphi ActiveXDelphi DLLGoJavaLianjaMono C#Node.jsObjective-CPHP ActiveXPHP ExtensionPerlPowerBuilderPowerShellPureBasicRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++VB.NETVBScriptVisual Basic 6.0Visual FoxProXojo Plugin

Perl Examples

Web API Categories

ASN.1
AWS KMS
AWS Misc
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Key Vault
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Cloud Signature CSC
Code Signing
Compression
DKIM / DomainKey
DNS
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
Misc
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
SharePoint Online
Signing in the Cloud
Socket/SSL/TLS
Spider
Stream
Tar Archive
ULID/UUID
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl
uncategorized

 

 

 

(Perl) Fetch S3 Object Metadata

Demonstrates how to get the metadata for an S3 object using the REST API.

The HEAD operation retrieves metadata from an object without returning the object itself. This operation is useful if you are interested only in an object's metadata. To use HEAD, you must have READ access to the object.

A HEAD request has the same options as a GET operation on an object. The response is identical to the GET response except that there is no response body.

Chilkat Perl Downloads

Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$rest = chilkat::CkRest->new();

# Connect to the Amazon AWS REST server using the correct region (in this example, "us-west-2")
$bTls = 1;
$port = 443;
$bAutoReconnect = 1;
$success = $rest->Connect("s3-us-west-2.amazonaws.com",$port,$bTls,$bAutoReconnect);

# Provide AWS credentials for the REST call.
$authAws = chilkat::CkAuthAws->new();
$authAws->put_AccessKey("AWS_ACCESS_KEY");
$authAws->put_SecretKey("AWS_SECRET_KEY");
$authAws->put_ServiceName("s3");
# Make sure the Region agrees with the region in the Connect.
$authAws->put_Region("us-west-2");
$success = $rest->SetAuthAws($authAws);

# User-defined metadata are name/value pairs, and are returned in the HTTP response header.
# Metadata header names begin with "x-amz-meta-" to distinguish them from other HTTP headers.
# Note that Amazon S3 stores user-defined metadata keys in lowercase.

# Set the bucket name via the HOST header.
# In this case, the bucket name is "chilkat.ocean".
$rest->put_Host("chilkat.ocean.s3.amazonaws.com");

# Send the HEAD request.
$success = $rest->SendReqNoBody("HEAD","/seahorse.jpg");
if ($success != 1) {
    print $rest->lastErrorText() . "\r\n";
    exit;
}

# Read the response header.
$responseStatusCode = $rest->ReadResponseHeader();
if ($responseStatusCode < 0) {
    print $rest->lastErrorText() . "\r\n";
    exit;
}

print "Response status code = " . $responseStatusCode . "\r\n";
if ($responseStatusCode != 200) {
    print $rest->responseHeader() . "\r\n";
    print "Object does not exist." . "\r\n";
    exit;
}

# Show the full response header that was received:
print "Response header:" . "\r\n";
print $rest->responseHeader() . "\r\n";
print "--" . "\r\n";

# Here is an example response header:

# 	x-amz-id-2: uS4Flff04M8x5YWajU231TP0ClBL19mMhuyfU5ZVQd6NsUHXVhHK+H3b0sjxY98Fujet1ejhyzk=
# 	x-amz-request-id: 27950009AA8E68AA
# 	Date: Mon, 23 Jan 2017 20:12:58 GMT
# 	Last-Modified: Fri, 20 Jan 2017 00:22:57 GMT
# 	ETag: "a8551f0a5437f43a796fca7623ee9232"
# 	x-amz-meta-species: big-belly seahorse
# 	x-amz-meta-genus: Hippocampus
# 	x-amz-meta-habitat: shallow tropical and temperate waters
# 	Accept-Ranges: bytes
# 	Content-Type: image/jpg
# 	Content-Length: 24388
# 	Server: AmazonS3

# Examine particular response headers (the object metadata headers..)
print "x-amz-meta-species: " . $rest->responseHdrByName("x-amz-meta-species") . "\r\n";
print "x-amz-meta-genus: " . $rest->responseHdrByName("x-amz-meta-genus") . "\r\n";
print "x-amz-meta-habitat: " . $rest->responseHdrByName("x-amz-meta-habitat") . "\r\n";
print "--" . "\r\n";

# It is possible to iterate over the header fields to find all x-amz-meta* headers
$i = 0;
$numHeaders = $rest->get_NumResponseHeaders();
$sbName = chilkat::CkStringBuilder->new();
while ($i < $numHeaders) {
    $sbName->SetString($rest->responseHdrName($i));
    if ($sbName->StartsWith("x-amz-meta",0) == 1) {
        print $sbName->getAsString() . ": " . $rest->responseHdrValue($i) . "\r\n";
    }

    $i = $i + 1;
}

# The output:

# 	x-amz-meta-species: big-belly seahorse
# 	x-amz-meta-genus: Hippocampus
# 	x-amz-meta-habitat: shallow tropical and temperate waters

 

© 2000-2024 Chilkat Software, Inc. All Rights Reserved.