(Swift 3,4,5...) Isabel Connect Create Access Token given Valid Refresh Token

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Create (refresh) an access token given a valid refresh token.

For more information, see https://documentation.ibanity.com/isabel-connect/api#create-access-token

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let http = CkoHttp()!

    // Implements the following CURL command:

    // curl -X POST https://api.ibanity.com/isabel-connect/oauth2/token \
    // --cert certificate.pem:qwertyuiop1 \
    // --key private_key.pem  \
    // -H "Content-Type: application/x-www-form-urlencoded" \
    // -H "Accept: application/vnd.api+json" \
    // -H "Ibanity-Idempotency-Key: 94c5586e-e15e-4bae-a1fe-fdbefe1f11d3"  \
    // -d grant_type=refresh_token \
    // -d refresh_token=valid_refresh_token \
    // -d client_id=valid_client_id \
    // -d client_secret=valid_client_secret

    // Ibanity provides the certificate + private key in PFX format.  This example will use the .pfx instead of the pair of PEM files.
    // (It is also possible to implement using Chilkat with the PEM files, but PFX is easier.)
    let cert = CkoCert()!
    var success: Bool = cert.loadPfxFile("qa_data/pfx/my_ibanity_certificate.pfx", password: "my_pfx_password")
    if success == false {
        print("\(cert.lastErrorText!)")
        return
    }

    success = http.setSslClientCert(cert)
    if success == false {
        print("\(http.lastErrorText!)")
        return
    }

    let req = CkoHttpRequest()!
    req.httpVerb = "POST"
    req.path = "/isabel-connect/oauth2/token"
    req.contentType = "application/x-www-form-urlencoded"
    req.addParam("grant_type", value: "refresh_token")

    // Load the previously obtained refresh token.
    let jsonToken = CkoJsonObject()!
    success = jsonToken.loadFile("qa_data/tokens/isabel_refresh_token.json")
    if success == false {
        print("No existing access token.")
        return
    }

    req.addParam("refresh_token", value: jsonToken.string(of: "refresh_token"))

    // Note: For sandbox testing, we literally want to use the strings
    // "valid_client_id", and "valid_client_secret".
    // For the live app, you would replace these with actual values.
    req.addParam("client_id", value: "valid_client_id")
    req.addParam("client_secret", value: "valid_client_secret")

    req.addHeader("Accept", value: "application/vnd.api+json")

    let crypt = CkoCrypt2()!
    var idempotencyKey: String? = crypt.generateUuid()
    print("Ibanity-Idempotency-Key: \(idempotencyKey!)")
    req.addHeader("Ibanity-Idempotency-Key", value: idempotencyKey)

    var resp: CkoHttpResponse? = http.postUrlEncoded("https://api.ibanity.com/isabel-connect/oauth2/token", req: req)
    if http.lastMethodSuccess == false {
        print("\(http.lastErrorText!)")
        return
    }

    let sbResponseBody = CkoStringBuilder()!
    resp!.getBodySb(sbResponseBody)
    let jResp = CkoJsonObject()!
    jResp.loadSb(sbResponseBody)
    jResp.emitCompact = false

    print("Response Body:")
    print("\(jResp.emit()!)")

    var respStatusCode: Int = resp!.statusCode.intValue
    print("Response Status Code = \(respStatusCode)")
    if respStatusCode >= 400 {
        print("Response Header:")
        print("\(resp!.header!)")
        print("Failed.")
        resp = nil
        return
    }

    resp = nil

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // Notice that we don't get a new refresh token.  The original refresh token is used each time we
    // want to refresh.  However, we get a new access token.  This access token is to be used in Isabel API calls
    // until we need to refresh again.
    // {
    //   "token_type": "Bearer",
    //   "scope": "cloudconnect",
    //   "expires_in": 1799,
    //   "access_token": "access_token_1603365408"
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    var token_type: String? = jResp.string(of: "token_type")
    var scope: String? = jResp.string(of: "scope")
    var expires_in: Int = jResp.int(of: "expires_in").intValue
    var access_token: String? = jResp.string(of: "access_token")

    // Save this to a file so we can load in other examples to include the access token in the HTTP request.
    success = jResp.writeFile("qa_data/tokens/isabel_access_token.json")

}