(PureBasic) Xero Upload Attachment

Demonstrates how to upload an attachment to Xero.

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

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkBinData.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkHttpResponse.pb"

Procedure ChilkatExample()

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

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

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

    jsonToken.i = CkJsonObject::ckCreate()
    If jsonToken.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkJsonObject::ckLoadFile(jsonToken,"qa_data/tokens/xero-access-token.json")
    If success = 0
        Debug CkJsonObject::ckLastErrorText(jsonToken)
        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(jsonToken)
        ProcedureReturn
    EndIf

    CkHttp::setCkAuthToken(http, CkJsonObject::ckStringOf(jsonToken,"access_token"))

    ; Replace the value here with an actual tenant ID obtained from this example:
    ; Get Xero Tenant IDs
    CkHttp::ckSetRequestHeader(http,"Xero-tenant-id","83299b9e-5747-4a14-a18a-a6c94f824eb7")

    CkHttp::setCkAccept(http, "application/json")

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

    ; Endpoint can be Invoices, Receipts, CreditNotes, PurchaseOrders, etc.
    CkHttp::ckSetUrlVar(http,"Endpoint","Invoices")

    ; Guid is the ID of the item, such as the InvoiceID.
    CkHttp::ckSetUrlVar(http,"Guid","0032f627-3156-4d30-9b1c-4d3b994dc921")

    ; Filename is the filename of the attachment you are uploading.
    CkHttp::ckSetUrlVar(http,"Filename","penguins.jpg")

    ; Load the file to be uploaded (from the local filesystem).
    bd.i = CkBinData::ckCreate()
    If bd.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkBinData::ckLoadFile(bd,"qa_data/jpg/penguins.jpg")
    If success = 0
        Debug "Failed to load attachment file."
        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(jsonToken)
        CkBinData::ckDispose(bd)
        ProcedureReturn
    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
    resp.i = CkHttp::ckPBinaryBd(http,"POST",url,bd,"image/jpg",0,0)
    If CkHttp::ckLastMethodSuccess(http) <> 1
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(jsonToken)
        CkBinData::ckDispose(bd)
        ProcedureReturn
    EndIf

    Debug "Response Status Code: " + Str(CkHttpResponse::ckStatusCode(resp))

    jsonResponse.i = CkJsonObject::ckCreate()
    If jsonResponse.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoad(jsonResponse,CkHttpResponse::ckBodyStr(resp))
    CkJsonObject::setCkEmitCompact(jsonResponse, 0)
    Debug CkJsonObject::ckEmit(jsonResponse)

    If CkHttpResponse::ckStatusCode(resp) <> 200
        Debug "Failed."
        CkHttpResponse::ckDispose(resp)

        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(jsonToken)
        CkBinData::ckDispose(bd)
        CkJsonObject::ckDispose(jsonResponse)
        ProcedureReturn
    EndIf

    CkHttpResponse::ckDispose(resp)

    ; 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
    ;     }
    ;   ]
    ; }


    CkHttp::ckDispose(http)
    CkJsonObject::ckDispose(jsonToken)
    CkBinData::ckDispose(bd)
    CkJsonObject::ckDispose(jsonResponse)


    ProcedureReturn
EndProcedure