Chilkat Examples

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(PowerBuilder) PayPal Generate QR Code

Generates a QR code for an invoice, by ID.

The QR code is a PNG image in Base64-encoded format that corresponds to the invoice ID.

Note: A QR code can only be generated for an invoice that has been both created and sent.

See also Generate QR Code

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_JsonToken
oleobject loo_SbAuth
oleobject loo_Rest
integer li_BAutoReconnect
integer li_Success
oleobject loo_SbPath
integer li_NumReplacements
oleobject loo_SbJsonResponse
oleobject loo_Json
oleobject loo_PngData

// Note: Requires Chilkat v9.5.0.64 or greater.

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

// Load our previously obtained access token. (see PayPal OAuth2 Access Token)
loo_JsonToken = create oleobject
li_rc = loo_JsonToken.ConnectToNewObject("Chilkat_9_5_0.JsonObject")
if li_rc < 0 then
    destroy loo_JsonToken
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_JsonToken.LoadFile("qa_data/tokens/paypal.json")

// Build the Authorization request header field value.
loo_SbAuth = create oleobject
li_rc = loo_SbAuth.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

// token_type should be "Bearer"
loo_SbAuth.Append(loo_JsonToken.StringOf("token_type"))
loo_SbAuth.Append(" ")
loo_SbAuth.Append(loo_JsonToken.StringOf("access_token"))

// Make the initial connection.
// A single REST object, once connected, can be used for many PayPal REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat_9_5_0.Rest")

li_BAutoReconnect = 1
li_Success = loo_Rest.Connect("api.sandbox.paypal.com",443,1,li_BAutoReconnect)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_JsonToken
    destroy loo_SbAuth
    destroy loo_Rest
    return
end if

// ----------------------------------------------------------------------------------------------
// 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..
// ----------------------------------------------------------------------------------------------

// Build a path using an invoice ID.
loo_SbPath = create oleobject
li_rc = loo_SbPath.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

loo_SbPath.Append("/v1/invoicing/invoices/invoice_id/qr-code")
li_NumReplacements = loo_SbPath.Replace("invoice_id","INV2-ZG2H-HKAW-PMWU-N6ZR")

loo_Rest.AddHeader("Authorization",loo_SbAuth.GetAsString())
// A 500x500 image results in a PNG file of approx. 4K bytes in size.
loo_Rest.AddQueryParam("width","500")
loo_Rest.AddQueryParam("height","500")
loo_Rest.AddQueryParam("action","pay")

// Send the GET request and get the PNG image data as base64.
// A successful JSON response looks like this:
// {"image":"iVBORw0KGgoAA....AASUVORK5CYII="}
loo_SbJsonResponse = create oleobject
li_rc = loo_SbJsonResponse.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

li_Success = loo_Rest.FullRequestNoBodySb("GET",loo_SbPath.GetAsString(),loo_SbJsonResponse)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_JsonToken
    destroy loo_SbAuth
    destroy loo_Rest
    destroy loo_SbPath
    destroy loo_SbJsonResponse
    return
end if

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_Json.EmitCompact = 0
loo_Json.LoadSb(loo_SbJsonResponse)

Write-Debug "Response Status Code = " + string(loo_Rest.ResponseStatusCode)

// Did we get a 200 success response?
if loo_Rest.ResponseStatusCode <> 200 then
    Write-Debug loo_Json.Emit()
    Write-Debug "Failed."
    destroy loo_JsonToken
    destroy loo_SbAuth
    destroy loo_Rest
    destroy loo_SbPath
    destroy loo_SbJsonResponse
    destroy loo_Json
    return
end if

// If the 200 response is received, the response body contains the PNG data.
// Save the PNG to a file.
loo_PngData = create oleobject
li_rc = loo_PngData.ConnectToNewObject("Chilkat_9_5_0.BinData")

loo_PngData.AppendEncoded(loo_Json.StringOf("image"),"base64")
li_Success = loo_PngData.WriteFile("qa_output/paypal_qr_code.png")
if li_Success = 0 then
    Write-Debug "Failed to save PNG file."
    destroy loo_JsonToken
    destroy loo_SbAuth
    destroy loo_Rest
    destroy loo_SbPath
    destroy loo_SbJsonResponse
    destroy loo_Json
    destroy loo_PngData
    return
end if

Write-Debug "Success."


destroy loo_JsonToken
destroy loo_SbAuth
destroy loo_Rest
destroy loo_SbPath
destroy loo_SbJsonResponse
destroy loo_Json
destroy loo_PngData

 

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