(Tcl) Glacier Download Archive

Demonstrates how to download an Amazon Glacier archive. Downloading a Glacier archive is a two step process. First an archive retrieval job is initiated. After it completes, the job output is downloaded (i.e. the archive contents are downloaded.)

Note: This example requires Chilkat v9.5.0.78 or greater.

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load ./chilkat.dll

# 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 in the desired region.
set bTls 1
set port 443
set bAutoReconnect 1
set success [CkRest_Connect $rest "glacier.us-west-2.amazonaws.com" $port $bTls $bAutoReconnect]

# Provide AWS credentials.
set authAws [new_CkAuthAws]

CkAuthAws_put_AccessKey $authAws "AWS_ACCESS_KEY"
CkAuthAws_put_SecretKey $authAws "AWS_SECRET_KEY"
CkAuthAws_put_ServiceName $authAws "glacier"
CkAuthAws_put_Region $authAws "us-west-2"

set success [CkRest_SetAuthAws $rest $authAws]

# --------------------------------------------------------------------------
# Note: The above REST connection and setup of the AWS credentials
# can be done once.  After connecting, any number of REST calls can be made.
# The "auto reconnect" property passed to rest.Connect indicates that if
# the connection is lost, a REST method call will automatically reconnect
# if needed.
# --------------------------------------------------------------------------

# 
# For more information, see Glacier Retrieve Job Output Reference Documentation
# 
CkRest_AddHeader $rest "x-amz-glacier-version" "2012-06-01"

# To download an archive, we'll make several method calls:
# 1) Send the HTTPS GET request.
# 2) Get the response body.
# 3) If the response status code indicates success, stream the response body (i.e the archive data) to a file.
# 4) If the response status code indicates an error, get the JSON error response.

# Send the GET request.
set success [CkRest_SendReqNoBody $rest "GET" "/AWS_ACCOUNT_ID/vaults/chilkat/jobs/JOB_ID/output"]
if {$success != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkAuthAws $authAws
    exit
}

# Read the response header.
set responseStatusCode [CkRest_ReadResponseHeader $rest]
if {$responseStatusCode < 0} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkAuthAws $authAws
    exit
}

puts "Response status code = $responseStatusCode"

# We expect a 200 response status if the archive data is coming.
# Otherwise, we'll get a JSON response body with an error message(or no response body).
if {$responseStatusCode == 200} then {

    set bodyStream [new_CkStream]

    # The stream's sink will be a file.
    CkStream_put_SinkFile $bodyStream "qa_output/archiveData.dat"

    # Read the response body to the stream.
    set success [CkRest_ReadRespBodyStream $rest $bodyStream 1]
    if {$success != 1} then {
        puts [CkRest_lastErrorText $rest]
        delete_CkRest $rest
        delete_CkAuthAws $authAws
        delete_CkStream $bodyStream
        exit
    }

    puts "Successfully received the archive file."

} else {
    set jsonError [CkRest_readRespBodyString $rest]
    if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
        puts [CkRest_lastErrorText $rest]
    }     else {
        puts "$jsonError"
    }

}


delete_CkRest $rest
delete_CkAuthAws $authAws
delete_CkStream $bodyStream