Node.js

PayPal Generate QR Code

See more PayPal Examples

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

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  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)
    var jsonToken = new chilkat.JsonObject();
    jsonToken.LoadFile("qa_data/tokens/paypal.json");

    //  Build the Authorization request header field value.
    var sbAuth = new chilkat.StringBuilder();
    //  token_type should be "Bearer"
    sbAuth.Append(jsonToken.StringOf("token_type"));
    sbAuth.Append(" ");
    sbAuth.Append(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.
    var rest = new chilkat.Rest();
    var bAutoReconnect = true;
    success = rest.Connect("api.sandbox.paypal.com",443,true,bAutoReconnect);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

    //  ----------------------------------------------------------------------------------------------
    //  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.
    var sbPath = new chilkat.StringBuilder();
    sbPath.Append("/v1/invoicing/invoices/invoice_id/qr-code");
    var numReplacements = sbPath.Replace("invoice_id","INV2-ZG2H-HKAW-PMWU-N6ZR");

    rest.AddHeader("Authorization",sbAuth.GetAsString());
    //  A 500x500 image results in a PNG file of approx. 4K bytes in size.
    rest.AddQueryParam("width","500");
    rest.AddQueryParam("height","500");
    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="}
    var sbJsonResponse = new chilkat.StringBuilder();
    success = rest.FullRequestNoBodySb("GET",sbPath.GetAsString(),sbJsonResponse);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

    var json = new chilkat.JsonObject();
    json.EmitCompact = false;
    json.LoadSb(sbJsonResponse);

    console.log("Response Status Code = " + rest.ResponseStatusCode);

    //  Did we get a 200 success response?
    if (rest.ResponseStatusCode !== 200) {
        console.log(json.Emit());
        console.log("Failed.");
        return;
    }

    //  If the 200 response is received, the response body contains the PNG data.
    //  Save the PNG to a file.
    var pngData = new chilkat.BinData();
    pngData.AppendEncoded(json.StringOf("image"),"base64");
    success = pngData.WriteFile("qa_output/paypal_qr_code.png");
    if (success == false) {
        console.log("Failed to save PNG file.");
        return;
    }

    console.log("Success.");

}

chilkatExample();