(Go) 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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    // 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.

    rest := chilkat.NewRest()

    // Connect to the Azure Storage Blob Service
    bTls := true
    port := 443
    bAutoReconnect := true
    // In this example, the storage account name is "chilkat".
    success := rest.Connect("chilkat.file.core.windows.net",port,bTls,bAutoReconnect)
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        return
    }

    // This example will upload a relatively small file (760K), so it may as well 
    // just be load it into memory..
    jpgData := chilkat.NewBinData()
    jpgData.LoadFile("qa_data/jpg/penguins.jpg")

    // Provide Azure Cloud credentials for the REST calls.
    azAuth := chilkat.NewAuthAzureStorage()
    azAuth.SetAccessKey("AZURE_ACCESS_KEY")
    // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
    azAuth.SetAccount("chilkat")
    azAuth.SetScheme("SharedKey")
    azAuth.SetService("File")
    // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
    azAuth.SetXMsVersion("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","file")

    // This required header specifies the final size of the file (or the maximum size it can be).
    sbFileSize := chilkat.NewStringBuilder()
    sbFileSize.AppendInt(jpgData.NumBytes())
    rest.AddHeader("x-ms-content-length",*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"
    responseStr := rest.FullRequestNoBody("PUT","/pip/wildlife/antarctic/penguins.jpg")
    if rest.LastMethodSuccess() != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        jpgData.DisposeBinData()
        azAuth.DisposeAuthAzureStorage()
        sbFileSize.DisposeStringBuilder()
        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() != 201 {
        // Examine the request/response to see what happened.
        fmt.Println("response status code = ", rest.ResponseStatusCode())
        fmt.Println("response status text = ", rest.ResponseStatusText())
        fmt.Println("response header: ", rest.ResponseHeader())
        fmt.Println("response body (if any): ", *responseStr)
        fmt.Println("---")
        fmt.Println("LastRequestStartLine: ", rest.LastRequestStartLine())
        fmt.Println("LastRequestHeader: ", rest.LastRequestHeader())
        rest.DisposeRest()
        jpgData.DisposeBinData()
        azAuth.DisposeAuthAzureStorage()
        sbFileSize.DisposeStringBuilder()
        return
    }

    fmt.Println("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

    sbRange := chilkat.NewStringBuilder()
    sbRange.Append("bytes=0-")
    sbRange.AppendInt(jpgData.NumBytes() - 1)

    rest.AddHeader("x-ms-range",*sbRange.GetAsString())

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

    sbResponseBody := chilkat.NewStringBuilder()
    // IMPORTANT:  Don't forget the "?comp=range" at the end of the path passed in the 2nd argument.
    success = rest.FullRequestBd("PUT","/pip/wildlife/antarctic/penguins.jpg?comp=range",jpgData,sbResponseBody)
    if success != true {
        // This would indicate a failure where no response was received.
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        jpgData.DisposeBinData()
        azAuth.DisposeAuthAzureStorage()
        sbFileSize.DisposeStringBuilder()
        sbRange.DisposeStringBuilder()
        sbResponseBody.DisposeStringBuilder()
        return
    }

    // A 201 response indicates the data was uploaded.
    if rest.ResponseStatusCode() != 201 {
        // Examine the request/response to see what happened.
        fmt.Println("response status code = ", rest.ResponseStatusCode())
        fmt.Println("response status text = ", rest.ResponseStatusText())
        fmt.Println("response header: ", rest.ResponseHeader())
        fmt.Println("response body (if any): ", *responseStr)
        fmt.Println("---")
        fmt.Println("LastRequestStartLine: ", rest.LastRequestStartLine())
        fmt.Println("LastRequestHeader: ", rest.LastRequestHeader())
        rest.DisposeRest()
        jpgData.DisposeBinData()
        azAuth.DisposeAuthAzureStorage()
        sbFileSize.DisposeStringBuilder()
        sbRange.DisposeStringBuilder()
        sbResponseBody.DisposeStringBuilder()
        return
    }

    fmt.Println("Successfully uploaded data into penguins.jpg")

    rest.DisposeRest()
    jpgData.DisposeBinData()
    azAuth.DisposeAuthAzureStorage()
    sbFileSize.DisposeStringBuilder()
    sbRange.DisposeStringBuilder()
    sbResponseBody.DisposeStringBuilder()