(Swift 3,4,5...) Azure File Service: Upload File

Sample code to upload a file to a directory in a share in the Azure File Service. A file is uploaded by first creating the file in the Azure share and then writes a range of bytes to the file. Azure imposes a 4MB limit for each PUT to write a range. Files larger than 4MB need to be uploaded by making multiple "Put Range" calls. This example uploads a file small enough for a single "Put Range" call.

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func chilkatTest() {
    // Azure File Service Example: Upload a file.  
    // See:  https://docs.microsoft.com/en-us/rest/api/storageservices/create-share
    // also see: https://docs.microsoft.com/en-us/rest/api/storageservices/put-range

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

    // This example will upload a relatively small file (760K), so it may as well 
    // just be load it into memory..
    let jpgData = CkoBinData()!
    jpgData.loadFile("qa_data/jpg/penguins.jpg")

    // 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(azAuth)

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

    // However, a few additional headers are required for the "Create File" operation:
    rest.addHeader("x-ms-type", value: "file")

    // This required header specifies the final size of the file (or the maximum size it can be).
    let sbFileSize = CkoStringBuilder()!
    sbFileSize.appendInt(jpgData.numBytes.intValue)
    rest.addHeader("x-ms-content-length", value: sbFileSize.getAsString())

    // Send a PUT request to create the file (or replace the file if it already exists).
    // This will initialize the file in the Azure file storage.  To upload content, we'll need
    // to do the "Put Range" operation one or more times.

    // The following will create the file "penguins.jpg" in the share "pip", in the directory "/wildlife/antarctic"
    var responseStr: String? = rest.fullRequestNoBody("PUT", uriPath: "/pip/wildlife/antarctic/penguins.jpg")
    if rest.lastMethodSuccess != true {
        print("\(rest.lastErrorText!)")
        return
    }

    // When successful, the Azure File Service will respond with a 201 (Created) response status code,
    // with no XML response body.  If an error response is returned, there will be an XML 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): \(responseStr!)")
        print("---")
        print("LastRequestStartLine: \(rest.lastRequestStartLine!)")
        print("LastRequestHeader: \(rest.lastRequestHeader!)")
        return
    }

    print("Successfully created penguins.jpg")

    // --------------------------------------------------------------------------------
    // Upload the file data...

    // Make sure the headers from the "Create File" operation are removed.
    rest.clearAllHeaders()

    // The only tricky part here is to correctly add the x-ms-range header.
    // It will be formatted like this:
    // x-ms-range: bytes=0-759623

    let sbRange = CkoStringBuilder()!
    sbRange.append("bytes=0-")
    sbRange.appendInt(jpgData.numBytes.intValue - 1)

    rest.addHeader("x-ms-range", value: sbRange.getAsString())

    // The x-ms-write header is also required:
    rest.addHeader("x-ms-write", value: "update")

    let sbResponseBody = CkoStringBuilder()!
    // IMPORTANT:  Don't forget the "?comp=range" at the end of the path passed in the 2nd argument.
    success = rest.fullRequestBd("PUT", uriPath: "/pip/wildlife/antarctic/penguins.jpg?comp=range", binData: jpgData, responseBody: sbResponseBody)
    if success != true {
        // This would indicate a failure where no response was received.
        print("\(rest.lastErrorText!)")
        return
    }

    // A 201 response indicates the data was uploaded.
    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): \(responseStr!)")
        print("---")
        print("LastRequestStartLine: \(rest.lastRequestStartLine!)")
        print("LastRequestHeader: \(rest.lastRequestHeader!)")
        return
    }

    print("Successfully uploaded data into penguins.jpg")

}