(Swift 3,4,5...) Upload using Azure Storage Account Shared Access Signature (SAS) Authorization

Sample code to upload binary bytes to a block blob in Azure Cloud Storage using an Azure Storage Account Shared Access Signature (SAS) Authorization. This creates a block blob, or replaces an existing block blob.

Note: The maximum size of a block blob created by uploading in a single step is 64MB. For larger files, the upload must be broken up into blocks. There is another Chilkat example for that..

Note: This example requires Chilkat v9.5.0.65 or later.

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func chilkatTest() {
    // Note: This example requires Chilkat v9.5.0.65 or greater.

    // Azure Blob Service Example: Upload binary bytes to a block blob.
    // This uses a Shared Access Signature (SAS) for Authorization.
    // This creates a new block blob or replaces an existing one in its entirety.
    // See also: https://msdn.microsoft.com/en-us/library/azure/dd179451.aspx

    // 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".
    var success: Bool = rest.connect("chilkat.blob.core.windows.net", port: port, tls: bTls, autoReconnect: bAutoReconnect)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // ----------------------------------------------------------------------------------------------
    // The code above this comment could be placed inside a function/subroutine within the application
    // because the connection does not need to be made for every request.  Once the connection is made
    // the app may send many requests..
    // ----------------------------------------------------------------------------------------------

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

    // Let's load a previously computed Azure Storage Account SAS token and use it.
    // See How to Create an Azure Storage Account Shared Access Signature
    let sbToken = CkoStringBuilder()!
    success = sbToken.loadFile("qa_data/tokens/azureStorageAccountSas.txt", charset: "utf-8")
    if success != true {
        print("Failed to load SAS token.")
        return
    }

    // Add the Shared Access Signature query params for authorization.
    rest.addQueryParams(sbToken.getAsString())

    // IMPORTANT: Make sure to set the x-ms-blob-type header:
    success = rest.addHeader("x-ms-blob-type", value: "BlockBlob")

    // IMPORTANT: Make sure to add the x-ms-date header.
    // When the header name is "x-ms-date", Chilkat will recognize the keyword "NOW" 
    // and will substitute the current system date/time formatted as required by Microsoft.
    success = rest.addHeader("x-ms-date", value: "NOW")

    // For this example, we'll just load a JPG file into memory..
    let binData = CkoBinData()!
    success = binData.loadFile("qa_data/jpg/starfish.jpg")
    if success != true {
        print("Failed to load JPG file.")
        return
    }

    // Note: The maximum size of a block blob created by uploading in a single step is 64MB.  
    // For larger files, the upload must be broken up into blocks.  There is another Chilkat example for that..
    let sbResponse = CkoStringBuilder()!
    success = rest.fullRequestBd("PUT", uriPath: "/mycontainer/starfish.jpg", binData: binData, responseBody: sbResponse)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // When successful, the Azure Storage service will respond with a 201 response status code,
    // with no response body.
    if rest.responseStatusCode.intValue != 201 {
        // 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!)")
        print("response body (if any): \(sbResponse.getAsString()!)")
        print("---")
        print("LastRequestStartLine: \(rest.lastRequestStartLine!)")
        print("LastRequestHeader: \(rest.lastRequestHeader!)")
        print("Failed.")
        return
    }

    print("Success.")

}