(Go) PayPal Send Invoice

Sends a PayPal invoice to a customer.

See also Send Invoice

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    // 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)
    jsonToken := chilkat.NewJsonObject()
    jsonToken.LoadFile("qa_data/tokens/paypal.json")

    // Build the Authorization request header field value.
    sbAuth := chilkat.NewStringBuilder()
    // 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.
    rest := chilkat.NewRest()
    bAutoReconnect := true
    success := rest.Connect("api.sandbox.paypal.com",443,true,bAutoReconnect)
    if success != true {
        fmt.Println(rest.LastErrorText())
        jsonToken.DisposeJsonObject()
        sbAuth.DisposeStringBuilder()
        rest.DisposeRest()
        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 a draft invoice ID.
    sbPath := chilkat.NewStringBuilder()
    sbPath.Append("/v1/invoicing/invoices/invoice_id/send")
    numReplacements := sbPath.Replace("invoice_id","INV2-QCHR-QHSD-M2VU-AVXC")

    rest.AddHeader("Authorization",*sbAuth.GetAsString())
    rest.AddQueryParam("notify_merchant","true")

    responseBody := rest.FullRequestFormUrlEncoded("POST",*sbPath.GetAsString())
    if rest.LastMethodSuccess() != true {
        fmt.Println(rest.LastErrorText())
        jsonToken.DisposeJsonObject()
        sbAuth.DisposeStringBuilder()
        rest.DisposeRest()
        sbPath.DisposeStringBuilder()
        return
    }

    fmt.Println("Response Status Code = ", rest.ResponseStatusCode())

    // Did we get a 202 accepted response?
    if rest.ResponseStatusCode() != 202 {
        fmt.Println(*responseBody)
        fmt.Println("Failed.")
        jsonToken.DisposeJsonObject()
        sbAuth.DisposeStringBuilder()
        rest.DisposeRest()
        sbPath.DisposeStringBuilder()
        return
    }

    // If the 202 response is received, the response body would be empty...
    fmt.Println("Success.")

    jsonToken.DisposeJsonObject()
    sbAuth.DisposeStringBuilder()
    rest.DisposeRest()
    sbPath.DisposeStringBuilder()