(PowerBuilder) Xero Download Attachment for an Item (such as an Invoice)

Demonstrates how to download a particular attachment for a particular Xero item.

For more information, see https://developer.xero.com/documentation/api/attachments#GET

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

integer li_rc
oleobject loo_Http
oleobject loo_JsonToken
integer li_Success
string ls_Url
oleobject loo_Bd

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

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

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

li_Success = loo_JsonToken.LoadFile("qa_data/tokens/xero-access-token.json")
if li_Success = 0 then
    Write-Debug loo_JsonToken.LastErrorText
    destroy loo_Http
    destroy loo_JsonToken
    return
end if

loo_Http.AuthToken = loo_JsonToken.StringOf("access_token")

// Replace the value here with an actual tenant ID obtained from this example:
// Get Xero Tenant IDs
loo_Http.SetRequestHeader("Xero-tenant-id","83299b9e-5747-4a14-a18a-a6c94f824eb7")

loo_Http.Accept = "application/json"

// The example to list Xero attachments shows how to get attachment information.
// Here's a sample JSON response obtained form listing attachments:
// Your application can get the AttachmentID's and filenames from it.

// {
//   "Id": "24bfbcb9-dec9-4d33-835c-8f165d776766",
//   "Status": "OK",
//   "ProviderName": "Chilkat2222",
//   "DateTimeUTC": "\/Date(1587213296972)\/",
//   "Attachments": [
//     {
//       "AttachmentID": "daf106e2-8634-4349-bfcc-86c1df0793b2",
//       "FileName": "penguins.jpg",
//       "Url": "https://api.xero.com/api.xro/2.0/Invoices/0032f627-3156-4d30-9b1c-4d3b994dc921/Attachments/penguins.jpg",
//       "MimeType": "image/jpg",
//       "ContentLength": 777835
//     }
//   ]
// }

ls_Url = "https://api.xero.com/api.xro/2.0/{$Endpoint}/{$Guid}/Attachments/{$AttachmentId}"

// Endpoint can be Invoices, Receipts, CreditNotes, PurchaseOrders, etc.
loo_Http.SetUrlVar("Endpoint","Invoices")

// Guid is the ID of the item, such as the InvoiceID.
loo_Http.SetUrlVar("Guid","0032f627-3156-4d30-9b1c-4d3b994dc921")

// AttachmentId is the ID of the particular attachment to be downloaded
loo_Http.SetUrlVar("AttachmentId","daf106e2-8634-4349-bfcc-86c1df0793b2")

// Download the attachment data into bd.
loo_Bd = create oleobject
// Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
li_rc = loo_Bd.ConnectToNewObject("Chilkat.BinData")

li_Success = loo_Http.QuickGetBd(ls_Url,loo_Bd)
if li_Success = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_JsonToken
    destroy loo_Bd
    return
end if

Write-Debug "Response Status Code: " + string(loo_Http.LastStatus)

if loo_Http.LastStatus = 200 then
    // Success
    // Save to a file..
    li_Success = loo_Bd.WriteFile("qa_output/penguines.jpg")
else
    // Failed.  bd contains error information..
    Write-Debug loo_Bd.GetString("utf-8")
end if



destroy loo_Http
destroy loo_JsonToken
destroy loo_Bd