Visual Basic 6.0

Create S3 Pre-Signed URL for Upload

See more Amazon S3 Examples

Demonstrates how to generate a pre-signed URL for S3 uploads. Visual Basic 6.0

Dim success As Long
success = 0

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

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-east-1"

Dim bucketName As String
bucketName = "chilkat200"
Dim objectName As String
objectName = "starfish/starfish.jpg"
Dim awsService As String
awsService = "s3"
Dim httpVerb As String
httpVerb = "PUT"

' 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 = 1

' Generate the pre-signed URL
Dim preSignedUrl As String
preSignedUrl = http.S3_GenPresignedUrl(httpVerb,bUseHttps,bucketName,objectName,numSecondsValid,awsService)
If (http.LastMethodSuccess = 0) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Debug.Print "Presigned URL for Upload: " & preSignedUrl

' Here's an example of a pre-signed URL
' 
' http://chilkat200.s3.amazonaws.com/starfish/starfish.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIBJLOVZVXAU2AFUA%2F20200623%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20200623T234049Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=xxxxxeaea071178d772856c0a4e4c0114a8d9992f0d0812955e490d0exxxxxxx
' 

' You can use the pre-signed URL to upload from Chilkat
' For example, upload by streaming from a local file
Dim resp As New ChilkatHttpResponse
success = http.HttpFile("PUT",preSignedUrl,"qa_data/jpg/starfish.jpg","image/jpg",resp)
If (success = 0) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Debug.Print "response status code = " & resp.StatusCode
Debug.Print "response body size: " & resp.ContentLength
If (resp.ContentLength > 0) Then
    Debug.Print "response body:"
    Debug.Print resp.BodyStr
End If