(PowerBuilder) 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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Rest
integer li_BTls
integer li_Port
integer li_BAutoReconnect
integer li_Success
oleobject loo_JpgData
oleobject loo_AzAuth
oleobject loo_SbFileSize
string ls_ResponseStr
oleobject loo_SbRange
oleobject loo_SbResponseBody

// 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.

loo_Rest = create oleobject
// Use "Chilkat_9_5_0.Rest" for versions of Chilkat < 10.0.0
li_rc = loo_Rest.ConnectToNewObject("Chilkat.Rest")
if li_rc < 0 then
    destroy loo_Rest
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Connect to the Azure Storage Blob Service
li_BTls = 1
li_Port = 443
li_BAutoReconnect = 1
// In this example, the storage account name is "chilkat".
li_Success = loo_Rest.Connect("chilkat.file.core.windows.net",li_Port,li_BTls,li_BAutoReconnect)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    return
end if

// This example will upload a relatively small file (760K), so it may as well 
// just be load it into memory..
loo_JpgData = create oleobject
// Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
li_rc = loo_JpgData.ConnectToNewObject("Chilkat.BinData")

loo_JpgData.LoadFile("qa_data/jpg/penguins.jpg")

// Provide Azure Cloud credentials for the REST calls.
loo_AzAuth = create oleobject
// Use "Chilkat_9_5_0.AuthAzureStorage" for versions of Chilkat < 10.0.0
li_rc = loo_AzAuth.ConnectToNewObject("Chilkat.AuthAzureStorage")

loo_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).
loo_AzAuth.Account = "chilkat"
loo_AzAuth.Scheme = "SharedKey"
loo_AzAuth.Service = "File"
// This causes the "x-ms-version: 2021-08-06" header to be automatically added.
loo_AzAuth.XMsVersion = "2021-08-06"
li_Success = loo_Rest.SetAuthAzureStorage(loo_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:
loo_Rest.AddHeader("x-ms-type","file")

// This required header specifies the final size of the file (or the maximum size it can be).
loo_SbFileSize = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbFileSize.ConnectToNewObject("Chilkat.StringBuilder")

loo_SbFileSize.AppendInt(loo_JpgData.NumBytes)
loo_Rest.AddHeader("x-ms-content-length",loo_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"
ls_ResponseStr = loo_Rest.FullRequestNoBody("PUT","/pip/wildlife/antarctic/penguins.jpg")
if loo_Rest.LastMethodSuccess <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_JpgData
    destroy loo_AzAuth
    destroy loo_SbFileSize
    return
end if

// 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 loo_Rest.ResponseStatusCode <> 201 then
    // Examine the request/response to see what happened.
    Write-Debug "response status code = " + string(loo_Rest.ResponseStatusCode)
    Write-Debug "response status text = " + loo_Rest.ResponseStatusText
    Write-Debug "response header: " + loo_Rest.ResponseHeader
    Write-Debug "response body (if any): " + ls_ResponseStr
    Write-Debug "---"
    Write-Debug "LastRequestStartLine: " + loo_Rest.LastRequestStartLine
    Write-Debug "LastRequestHeader: " + loo_Rest.LastRequestHeader
    destroy loo_Rest
    destroy loo_JpgData
    destroy loo_AzAuth
    destroy loo_SbFileSize
    return
end if

Write-Debug "Successfully created penguins.jpg"

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

// Make sure the headers from the "Create File" operation are removed.
loo_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

loo_SbRange = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbRange.ConnectToNewObject("Chilkat.StringBuilder")

loo_SbRange.Append("bytes=0-")
loo_SbRange.AppendInt(loo_JpgData.NumBytes - 1)

loo_Rest.AddHeader("x-ms-range",loo_SbRange.GetAsString())

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

loo_SbResponseBody = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbResponseBody.ConnectToNewObject("Chilkat.StringBuilder")

// IMPORTANT:  Don't forget the "?comp=range" at the end of the path passed in the 2nd argument.
li_Success = loo_Rest.FullRequestBd("PUT","/pip/wildlife/antarctic/penguins.jpg?comp=range",loo_JpgData,loo_SbResponseBody)
if li_Success <> 1 then
    // This would indicate a failure where no response was received.
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_JpgData
    destroy loo_AzAuth
    destroy loo_SbFileSize
    destroy loo_SbRange
    destroy loo_SbResponseBody
    return
end if

// A 201 response indicates the data was uploaded.
if loo_Rest.ResponseStatusCode <> 201 then
    // Examine the request/response to see what happened.
    Write-Debug "response status code = " + string(loo_Rest.ResponseStatusCode)
    Write-Debug "response status text = " + loo_Rest.ResponseStatusText
    Write-Debug "response header: " + loo_Rest.ResponseHeader
    Write-Debug "response body (if any): " + ls_ResponseStr
    Write-Debug "---"
    Write-Debug "LastRequestStartLine: " + loo_Rest.LastRequestStartLine
    Write-Debug "LastRequestHeader: " + loo_Rest.LastRequestHeader
    destroy loo_Rest
    destroy loo_JpgData
    destroy loo_AzAuth
    destroy loo_SbFileSize
    destroy loo_SbRange
    destroy loo_SbResponseBody
    return
end if

Write-Debug "Successfully uploaded data into penguins.jpg"


destroy loo_Rest
destroy loo_JpgData
destroy loo_AzAuth
destroy loo_SbFileSize
destroy loo_SbRange
destroy loo_SbResponseBody