Swift

Download a Binary File into Memory

See more Azure Cloud Storage Examples

Downloads a binary file into memory. Swift

func chilkatTest() {
    var success: Bool = false

    // Azure File Service Example: Download a Binary File to Memory
    // See:  https://docs.microsoft.com/en-us/rest/api/storageservices/get-file

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

    let rest = CkoRest()!

    // Connect to the Azure Storage Blob Service
    var bTls: Bool = true
    var port: Int = 443
    var bAutoReconnect: Bool = true
    // In this example, the storage account name is "chilkat".
    success = rest.connect(hostname: "chilkat.file.core.windows.net", port: port, tls: bTls, autoReconnect: bAutoReconnect)
    if success == false {
        print("\(rest.lastErrorText!)")
        return
    }

    // Provide Azure Cloud credentials for the REST calls.
    let azAuth = CkoAuthAzureStorage()!
    azAuth.accessKey = "AZURE_ACCESS_KEY"
    // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
    azAuth.account = "chilkat"
    azAuth.scheme = "SharedKey"
    azAuth.service = "File"
    // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
    azAuth.xMsVersion = "2021-08-06"
    success = rest.setAuthAzureStorage(authProvider: azAuth)

    // Note: The application does not need to explicitly set the following
    // headers: x-ms-date, Authorization.  These headers
    // are automatically set by Chilkat.

    // Send a GET request to download the file "penguins.jpg" to a BinData object.
    // (The share name is "pip")
    let bdFileContents = CkoBinData()!
    success = rest.fullRequestNoBodyBd(httpVerb: "GET", uriPath: "/pip/wildlife/antarctic/penguins.jpg", binData: bdFileContents)
    if success == false {
        print("\(rest.lastErrorText!)")
        return
    }

    // When successful, the response status will be 200.
    // If a non-success status code is returned, then the bdFileContents actually contains the XML error message.
    if rest.responseStatusCode.intValue != 200 {
        // Examine the request/response to see what happened.
        print("response status code = \(rest.responseStatusCode.intValue)")
        print("response status text = \(rest.responseStatusText!)")
        print("response header: \(rest.responseHeader!)")
        let sbXmlErr = CkoStringBuilder()!
        sbXmlErr.appendBd(binData: bdFileContents, charset: "utf-8", offset: 0, numBytes: 0)
        print("response body (if any): \(sbXmlErr.getAsString()!)")
        print("---")
        print("LastRequestStartLine: \(rest.lastRequestStartLine!)")
        print("LastRequestHeader: \(rest.lastRequestHeader!)")
        return
    }

    print("Size of the downloaded file = \(bdFileContents.numBytes.intValue)")

    // See the online reference documentation for the BinData class for ways
    // to access the bytes.

    bdFileContents.writeFile(path: "qa_output/penguins.jpg")

}