(Go) 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.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    rest := chilkat.NewRest()

    // Connect to the Amazon AWS REST server in the desired region.
    bTls := true
    port := 443
    bAutoReconnect := true
    success := rest.Connect("glacier.us-west-2.amazonaws.com",port,bTls,bAutoReconnect)

    // Provide AWS credentials.
    authAws := chilkat.NewAuthAws()
    authAws.SetAccessKey("AWS_ACCESS_KEY")
    authAws.SetSecretKey("AWS_SECRET_KEY")
    authAws.SetServiceName("glacier")
    authAws.SetRegion("us-west-2")

    success = rest.SetAuthAws(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
    // 
    rest.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.
    success = rest.SendReqNoBody("GET","/AWS_ACCOUNT_ID/vaults/chilkat/jobs/JOB_ID/output")
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        authAws.DisposeAuthAws()
        return
    }

    // Read the response header.
    responseStatusCode := rest.ReadResponseHeader()
    if responseStatusCode < 0 {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        authAws.DisposeAuthAws()
        return
    }

    fmt.Println("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 {

        bodyStream := chilkat.NewStream()

        // The stream's sink will be a file.
        bodyStream.SetSinkFile("qa_output/archiveData.dat")

        // Read the response body to the stream.
        success = rest.ReadRespBodyStream(bodyStream,true)
        if success != true {
            fmt.Println(rest.LastErrorText())
            rest.DisposeRest()
            authAws.DisposeAuthAws()
            bodyStream.DisposeStream()
            return
        }

        fmt.Println("Successfully received the archive file.")

    }
    else {
        jsonError := rest.ReadRespBodyString()
        if rest.LastMethodSuccess() != true {
            fmt.Println(rest.LastErrorText())
        }
        else {
            fmt.Println(*jsonError)
        }

    }


    rest.DisposeRest()
    authAws.DisposeAuthAws()
    bodyStream.DisposeStream()