Xojo Plugin

Create S3 Pre-Signed URL for Upload

See more Amazon S3 Examples

Demonstrates how to generate a pre-signed URL for S3 uploads. Xojo Plugin

Dim success As Boolean
success = False

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

Dim http As New Chilkat.Http

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 Int32
numSecondsValid = 86400

// Choose between a URL beginning with "http://" or "https://"...
Dim bUseHttps As Boolean
bUseHttps = True

// Generate the pre-signed URL
Dim preSignedUrl As String
preSignedUrl = http.S3_GenPresignedUrl(httpVerb,bUseHttps,bucketName,objectName,numSecondsValid,awsService)
If (http.LastMethodSuccess = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

System.DebugLog("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 Chilkat.HttpResponse
success = http.HttpFile("PUT",preSignedUrl,"qa_data/jpg/starfish.jpg","image/jpg",resp)
If (success = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

System.DebugLog("response status code = " + Str(resp.StatusCode))
System.DebugLog("response body size: " + Str(resp.ContentLength))
If (resp.ContentLength > 0) Then
    System.DebugLog("response body:")
    System.DebugLog(resp.BodyStr)
End If