(Lianja) Create S3 Pre-Signed URL for Upload

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

Chilkat Lianja Extension Download Chilkat Lianja Extension

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

// Note: This example requires Chilkat v9.5.0.83 or greater.

loHttp = createobject("CkHttp")

loHttp.AwsAccessKey = "AWS_ACCESS_KEY"
loHttp.AwsSecretKey = "AWS_SECRET_KEY"

// Make sure to set your AWS region correctly
loHttp.AwsRegion = "us-east-1"

lcBucketName = "chilkat200"
lcObjectName = "starfish/starfish.jpg"
lcAwsService = "s3"
lcHttpVerb = "PUT"

// The signed URL will be valid for this number of seconds:
lnNumSecondsValid = 86400

// Choose between a URL beginning with "http://" or "https://"...
llBUseHttps = .F.

// Generate the pre-signed URL
lcPreSignedUrl = loHttp.S3_GenPresignedUrl(lcHttpVerb,llBUseHttps,lcBucketName,lcObjectName,lnNumSecondsValid,lcAwsService)
if (loHttp.LastMethodSuccess = .F.) then
    ? loHttp.LastErrorText
    release loHttp
    return
endif

? "Presigned URL for Upload: " + lcPreSignedUrl

// 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
loResp = loHttp.PFile("PUT",lcPreSignedUrl,"qa_data/jpg/starfish.jpg","image/jpg",.F.,.F.)
if (loHttp.LastMethodSuccess = .F.) then
    ? loHttp.LastErrorText
    release loHttp
    return
endif

? "response status code = " + str(loResp.StatusCode)
? "response body size: " + str(loResp.ContentLength)
if (loResp.ContentLength > 0) then
    ? "response body:"
    ? loResp.BodyStr
endif

release loResp


release loHttp