Go

Upload using Azure Storage Account Shared Access Signature (SAS) Authorization

See more Azure Cloud Storage Examples

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.

Go

    success := false

    // 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.

    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.blob.core.windows.net",port,bTls,bAutoReconnect)
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        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
    sbToken := chilkat.NewStringBuilder()
    success = sbToken.LoadFile("qa_data/tokens/azureStorageAccountSas.txt","utf-8")
    if success != true {
        fmt.Println("Failed to load SAS token.")
        rest.DisposeRest()
        sbToken.DisposeStringBuilder()
        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","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","NOW")

    // For this example, we'll just load a JPG file into memory..
    binData := chilkat.NewBinData()
    success = binData.LoadFile("qa_data/jpg/starfish.jpg")
    if success != true {
        fmt.Println("Failed to load JPG file.")
        rest.DisposeRest()
        sbToken.DisposeStringBuilder()
        binData.DisposeBinData()
        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..
    sbResponse := chilkat.NewStringBuilder()
    success = rest.FullRequestBd("PUT","/mycontainer/starfish.jpg",binData,sbResponse)
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        sbToken.DisposeStringBuilder()
        binData.DisposeBinData()
        sbResponse.DisposeStringBuilder()
        return
    }

    // When successful, the Azure Storage service will respond with a 201 response status code,
    // with no 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): ", *sbResponse.GetAsString())
        fmt.Println("---")
        fmt.Println("LastRequestStartLine: ", rest.LastRequestStartLine())
        fmt.Println("LastRequestHeader: ", rest.LastRequestHeader())
        fmt.Println("Failed.")
        rest.DisposeRest()
        sbToken.DisposeStringBuilder()
        binData.DisposeBinData()
        sbResponse.DisposeStringBuilder()
        return
    }

    fmt.Println("Success.")

    rest.DisposeRest()
    sbToken.DisposeStringBuilder()
    binData.DisposeBinData()
    sbResponse.DisposeStringBuilder()