(Swift 3,4,5...) ZATCA Onboarding Get Compliance CSID

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Demonstrates sending a POST to get a compliance CSID, which is two parts: A binary security token, and a secret.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // It is assumed you've already generated a CSR.
    // Also, you'll need an OTP code, valid for 1 hour, which is generated online in the Fatoora portal.  See 
    // https://zatca.gov.sa/ar/E-Invoicing/Introduction/Guidelines/Documents/E-invoicing%20Detailed%20Technical%20Guidelines.pdf

    // Manually replace this with the OTP code you interactively obtained in a browser session from the Fatoora portal.
    // The OTP code is valid for 1 hour.
    var otp: String? = "123434"

    // You should already have a CSR in a file containing something that looks like this:

    // -----BEGIN CERTIFICATE REQUEST-----
    // MIIB5DCCAYsCAQAwTDELMAkGA1UEBhMCU0ExFTATBgNVBAsMDFJpeWFkIEJyYW5j
    // aDEQMA4GA1UECgwHQ29udG9zbzEUMBIGA1UEAwwLRUExMjM0NTY3ODkwVjAQBgcq
    // hkjOPQIBBgUrgQQACgNCAAQI6op+6GQ4Gmn9oy0DpGxX0lFtUIvj+4Jtnp0VyEsH
    // +ZO7lpgksbRC484R3fAsO0v+Ly24ZIUIOYEIAeJ1f6AooIHfMIHcBgkqhkiG9w0B
    // CQ4xgc4wgcswIQYJKwYBBAGCNxQCBBQTElpBVENBLUNvZGUtU2lnbmluZzCBpQYD
    // VR0RBIGdMIGapIGXMIGUMTswOQYDVQQEDDIxLVRTVHwyLVRTVHwzLWVkMjJmMWQ4
    // LWU2YTItMTExOC05YjU4LWQ5YThmMTFlNDQ1ZjEfMB0GCgmSJomT8ixkAQEMDzMx
    // MDEyMjM5MzUwMDAwMzENMAsGA1UEDAwEMTEwMDESMBAGA1UEGgwJTXlBZGRyZXNz
    // MREwDwYDVQQPDAhJbmR1c3RyeTAKBggqhkjOPQQDAgNHADBEAiBurm6KdAeHfXzt
    // h/jk8xSMBP4TAkkFrg+hWDhfI0/SuAIgJi8ectM7YwBIBCmf0tdFcVTU7GBbvjnK
    // xValZCAO39M=
    // -----END CERTIFICATE REQUEST-----

    let pem = CkoPem()!
    var success: Bool = pem.loadFile("c:/aaworkarea/zatca/onboarding/taxpayer.csr", password: "")
    if success == false {
        print("\(pem.lastErrorText!)")
        return
    }

    // Get the base64 from the CSR in a single line.
    let sbCsrBase64 = CkoStringBuilder()!
    sbCsrBase64.append(pem.getEncodedItem("csr", itemSubType: "", encoding: "base64", index: 0))
    var numReplaced: Int = sbCsrBase64.replace("\r", replacement: "").intValue
    numReplaced = sbCsrBase64.replace("\n", replacement: "").intValue
    var csrBase64: String? = sbCsrBase64.getAsString()
    print("\(csrBase64!)")

    let json = CkoJsonObject()!
    json.emitCompact = false
    json.updateSb("csr", sb: sbCsrBase64)

    let http = CkoHttp()!
    http.accept = "application/json"
    http.setRequestHeader("OTP", value: otp)
    http.setRequestHeader("Accept-Version", value: "V2")
    var resp: CkoHttpResponse? = http.postJson3("https://gw-apic-gov.gazt.gov.sa/e-invoicing/core/compliance", contentType: "application/json", json: json)
    if http.lastMethodSuccess == false {
        print("\(http.lastErrorText!)")
        return
    }

    if resp!.statusCode.intValue != 200 {
        print("\(resp!.bodyStr!)")
        print("response status code = \(resp!.statusCode.intValue)")
        print("Failed")
        resp = nil
        return
    }

    let jsonResp = CkoJsonObject()!
    resp!.getBodyJson(jsonResp)

    jsonResp.emitCompact = false
    print("JSON response:")
    print("\(jsonResp.emit()!)")

    resp = nil

}