Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3/4TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

Visual Basic 6.0 Examples

Web API Categories

ASN.1
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
Geolocation
Google APIs
Google Calendar
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
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
REST
REST Misc
RSA
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(Visual Basic 6.0) Generate an AWS (S3) Pre-Signed URL using Signature V4

Demonstrates how to generate a pre-signed URL using AWS Signature Version 4. This example generates a pre-signed URL for the Amazon S3 service.

Note: this example requires Chilkat v9.5.0.66 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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

' Note: This example requires Chilkat v9.5.0.66 or greater.

Dim http As New ChilkatHttp

http.AwsAccessKey = "AWS_ACCESS_KEY"
http.AwsSecretKey = "AWS_SECRET_KEY"

' Make sure to set your AWS region correctly
http.AwsRegion = "us-west-2"

Dim bucketName As String
bucketName = "chilkat.qa"
Dim objectName As String
objectName = "images/sea_creatures/starfish.jpg"
Dim localFilePath As String
localFilePath = "qa_output/starfish.jpg"
Dim awsService As String
awsService = "s3"

' The signed URL will be valid for this number of seconds:
Dim numSecondsValid As Long
numSecondsValid = 86400

' Choose between a URL beginning with "http://" or "https://"...
Dim bUseHttps As Long
bUseHttps = 0

' Generate the pre-signed URL
Dim preSignedUrl As String
preSignedUrl = http.S3_GenerateUrlV4(bUseHttps,bucketName,objectName,numSecondsValid,awsService)
If (http.LastMethodSuccess <> 1) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

' The following URL can be copy-and-pasted into a browser..
Debug.Print "Pre-Signed AWS S3 URL: " & preSignedUrl

' Here's an example of a pre-signed URL. 
' This URL will only work within 1 day (86400 seconds) after the time this example was published.
' 
'     http://chilkat.qa.s3.amazonaws.com/images/sea_creatures/starfish.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=16QXXDGY83AJJR6RVQ02%2F20170111%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20170111T161959Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=72bf4fd9a15d7bbcdd313a3318d937a778905f62a3fbff9b789d8dc28acd9232

' Now try to do an HTTP Download using the signed URL.
Dim success As Long
success = http.Download(preSignedUrl,"qa_output/starfish.jpg")
If (success <> 1) Then
    Debug.Print http.LastErrorText
Else
    Debug.Print "Success."
End If


 

© 2000-2019 Chilkat Software, Inc. All Rights Reserved.