(Tcl) Create S3 Pre-Signed URL for Upload

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

Chilkat Tcl Extension Downloads Chilkat Tcl Extension Downloads

load ./chilkat.dll

# 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.

set http [new_CkHttp]

CkHttp_put_AwsAccessKey $http "AWS_ACCESS_KEY"
CkHttp_put_AwsSecretKey $http "AWS_SECRET_KEY"

# Make sure to set your AWS region correctly
CkHttp_put_AwsRegion $http "us-east-1"

set bucketName "chilkat200"
set objectName "starfish/starfish.jpg"
set awsService "s3"
set httpVerb "PUT"

# The signed URL will be valid for this number of seconds:
set numSecondsValid 86400

# Choose between a URL beginning with "http://" or "https://"...
set bUseHttps 0

# Generate the pre-signed URL
set preSignedUrl [CkHttp_s3_GenPresignedUrl $http $httpVerb $bUseHttps $bucketName $objectName $numSecondsValid $awsService]
if {[CkHttp_get_LastMethodSuccess $http] == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    exit
}

puts "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
# resp is a CkHttpResponse
set resp [CkHttp_PFile $http "PUT" $preSignedUrl "qa_data/jpg/starfish.jpg" "image/jpg" 0 0]
if {[CkHttp_get_LastMethodSuccess $http] == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    exit
}

puts "response status code = [CkHttpResponse_get_StatusCode $resp]"
puts "response body size: [CkHttpResponse_get_ContentLength $resp]"
if {[CkHttpResponse_get_ContentLength $resp] > 0} then {
    puts "response body:"
    puts [CkHttpResponse_bodyStr $resp]
}

delete_CkHttpResponse $resp


delete_CkHttp $http