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Tcl Examples

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(Tcl) S3 Upload String using AWS Signature Version 2

Example to upload the contents of a string to the Amazon S3 service, using the older AWS Signature Version 2.

Chilkat Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

#  Demonstrates how to use older AWS S3 Signature Version 2 for uploading the contents
#  of a string variable to an object in a bucket.

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

set rest [new_CkRest]

#  Connect to the Amazon AWS REST server.
set bTls 1
set port 443
set bAutoReconnect 1
#  The file is uploaded to the bucket named "chilkat100", which becomes part of the domain:
set success [CkRest_Connect $rest "chilkat100.s3.amazonaws.com" $port $bTls $bAutoReconnect]

#  ----------------------------------------------------------------------------
#  Important: For buckets created in regions outside us-east-1,
#  there are three important changes that need to be made.
#  See Working with S3 Buckets in Non-us-east-1 Regions for the details.
#  ----------------------------------------------------------------------------

#  Provide AWS credentials for the REST call.
set authAws [new_CkAuthAws]

CkAuthAws_put_AccessKey $authAws "AWS_ACCESS_KEY"
CkAuthAws_put_SecretKey $authAws "AWS_SECRET_KEY"
CkAuthAws_put_ServiceName $authAws "s3"

#  For AWS Signature Version 2, the following two properties need to be set:
CkAuthAws_put_SignatureVersion $authAws 2
#  See http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#ConstructingTheCanonicalizedResourceElement
#  The bucket is "chilkat100", and the uriPath is "/hamlet_play.xml", which must match
#  the URI path passed to the FullRequestString method below.
CkAuthAws_put_CanonicalizedResourceV2 $authAws "/chilkat100/hamlet_play.xml"

set success [CkRest_SetAuthAws $rest $authAws]

#  Load a text file into memory.
set fac [new_CkFileAccess]

set fileContents [CkFileAccess_readEntireTextFile $fac "qa_data/xml/hamlet.xml" "utf-8"]
if {[expr [CkFileAccess_get_LastMethodSuccess $fac] != 1]} then {
    puts [CkFileAccess_lastErrorText $fac]
    delete_CkRest $rest
    delete_CkAuthAws $authAws
    delete_CkFileAccess $fac
    exit
}

#  To send the file in gzip or deflate compressed format, set the Content-Encoding request
#  header to "gzip" or "deflate".  (this is optional)
set success [CkRest_AddHeader $rest "Content-Encoding" "gzip"]

#  Indicate the Content-Type of our upload.  (This is optional)
set success [CkRest_AddHeader $rest "Content-Type" "text/xml"]

#  We can add an "Expect: 100-continue" header so that if the request is rejected
#  by the server immediately after receiving the request header, it can respond
#  and the client (Chilkat) can avoid sending the file data.
#  (this is optional)
set success [CkRest_AddHeader $rest "Expect" "100-continue"]

#  Upload the file to Amazon S3.
set responseBodyStr [CkRest_fullRequestString $rest "PUT" "/hamlet_play.xml" $fileContents]
if {[expr [CkRest_get_LastMethodSuccess $rest] != 1]} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkAuthAws $authAws
    delete_CkFileAccess $fac
    exit
}

#  Did we get a 200 response indicating success?
set statusCode [CkRest_get_ResponseStatusCode $rest]
if {[expr $statusCode != 200]} then {
    puts "Error response: $responseBodyStr"
    puts "Status code: $statusCode, Status text: [CkRest_responseStatusText $rest]"
    delete_CkRest $rest
    delete_CkAuthAws $authAws
    delete_CkFileAccess $fac
    exit
}

puts "File successfully uploaded."

delete_CkRest $rest
delete_CkAuthAws $authAws
delete_CkFileAccess $fac

 

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