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

loRest = createobject("CkRest")

// Connect to the Amazon AWS REST server in the desired region.
llBTls = .T.
lnPort = 443
llBAutoReconnect = .T.
llSuccess = loRest.Connect("glacier.us-west-2.amazonaws.com",lnPort,llBTls,llBAutoReconnect)

// Provide AWS credentials.
loAuthAws = createobject("CkAuthAws")
loAuthAws.AccessKey = "AWS_ACCESS_KEY"
loAuthAws.SecretKey = "AWS_SECRET_KEY"
loAuthAws.ServiceName = "glacier"
loAuthAws.Region = "us-west-2"

llSuccess = loRest.SetAuthAws(loAuthAws)

// --------------------------------------------------------------------------
// 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
// 
loRest.AddHeader("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.
llSuccess = loRest.SendReqNoBody("GET","/AWS_ACCOUNT_ID/vaults/chilkat/jobs/JOB_ID/output")
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loRest
    release loAuthAws
    return
endif

// Read the response header.
lnResponseStatusCode = loRest.ReadResponseHeader()
if (lnResponseStatusCode < 0) then
    ? loRest.LastErrorText
    release loRest
    release loAuthAws
    return
endif

? "Response status code = " + str(lnResponseStatusCode)

// 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 (lnResponseStatusCode = 200) then

    loBodyStream = createobject("CkStream")

    // The stream's sink will be a file.
    loBodyStream.SinkFile = "qa_output/archiveData.dat"

    // Read the response body to the stream.
    llSuccess = loRest.ReadRespBodyStream(loBodyStream,.T.)
    if (llSuccess <> .T.) then
        ? loRest.LastErrorText
        release loRest
        release loAuthAws
        release loBodyStream
        return
    endif

    ? "Successfully received the archive file."

else
    lcJsonError = loRest.ReadRespBodyString()
    if (loRest.LastMethodSuccess <> .T.) then
        ? loRest.LastErrorText
    else
        ? lcJsonError
    endif

endif



release loRest
release loAuthAws
release loBodyStream