(Visual FoxPro) Xero Upload Attachment

Demonstrates how to upload an attachment to Xero.

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

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

LOCAL loHttp
LOCAL loJsonToken
LOCAL lnSuccess
LOCAL lcUrl
LOCAL loBd
LOCAL loResp
LOCAL loJsonResponse

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')

* Important: Make sure your OAuth2 access token was obtained with the scope "accounting.attachments"
* included in the list of scopes.

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJsonToken = CreateObject('Chilkat.JsonObject')
lnSuccess = loJsonToken.LoadFile("qa_data/tokens/xero-access-token.json")
IF (lnSuccess = 0) THEN
    ? loJsonToken.LastErrorText
    RELEASE loHttp
    RELEASE loJsonToken
    CANCEL
ENDIF

loHttp.AuthToken = loJsonToken.StringOf("access_token")

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

loHttp.Accept = "application/json"

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

* Endpoint can be Invoices, Receipts, CreditNotes, PurchaseOrders, etc.
loHttp.SetUrlVar("Endpoint","Invoices")

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

* Filename is the filename of the attachment you are uploading.
loHttp.SetUrlVar("Filename","penguins.jpg")

* Load the file to be uploaded (from the local filesystem).
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData')
loBd = CreateObject('Chilkat.BinData')
lnSuccess = loBd.LoadFile("qa_data/jpg/penguins.jpg")
IF (lnSuccess = 0) THEN
    ? "Failed to load attachment file."
    RELEASE loHttp
    RELEASE loJsonToken
    RELEASE loBd
    CANCEL
ENDIF

* Indicate the content-type according to the file content type.
* Common content-types are:   image/jpg, image/png, application/pdf, application/zip, application/msword
* If you don't know, use application/octet-stream
loResp = loHttp.PBinaryBd("POST",lcUrl,loBd,"image/jpg",0,0)
IF (loHttp.LastMethodSuccess <> 1) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loJsonToken
    RELEASE loBd
    CANCEL
ENDIF

? "Response Status Code: " + STR(loResp.StatusCode)

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJsonResponse = CreateObject('Chilkat.JsonObject')
loJsonResponse.Load(loResp.BodyStr)
loJsonResponse.EmitCompact = 0
? loJsonResponse.Emit()

IF (loResp.StatusCode <> 200) THEN
    ? "Failed."
    RELEASE loResp
    RELEASE loHttp
    RELEASE loJsonToken
    RELEASE loBd
    RELEASE loJsonResponse
    CANCEL
ENDIF

RELEASE loResp

* A sample response:

* Use this online tool to generate parsing code from sample JSON: 
* Generate Parsing Code from JSON

* {
*   "Id": "35333c64-4449-457b-bf6a-1b64d538e3c7",
*   "Status": "OK",
*   "ProviderName": "Chilkat2222",
*   "DateTimeUTC": "\/Date(1587212597758)\/",
*   "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
*     }
*   ]
* }

RELEASE loHttp
RELEASE loJsonToken
RELEASE loBd
RELEASE loJsonResponse