(Swift 3,4,5...) SugarCRM Authenticate

Demonstrates how to authenticate to the SugarCRM REST v10 API. This is how an OAuth2 access token is obtained.

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func chilkatTest() {
    let rest = CkoRest()!
    var success: Bool

    success = rest.connect("your.site.domain", port: 443, tls: true, autoReconnect: true)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    rest.addHeader("Cache-Control", value: "no-cache")

    // The following code creates the JSON request body.
    // The JSON created by this code is shown below.
    let jsonReq = CkoJsonObject()!
    jsonReq.update("grant_type", value: "password")
    jsonReq.update("client_id", value: "sugar")
    jsonReq.update("client_secret", value: "CLIENT_SECRET")
    jsonReq.update("username", value: "admin")
    jsonReq.update("password", value: "password")
    jsonReq.update("platform", value: "custom_api")

    // The JSON request body created by the above code:

    // {
    //   "grant_type": "password",
    //   "client_id": "sugar",
    //   "client_secret": "CLIENT_SECRET",
    //   "username": "admin",
    //   "password": "password",
    //   "platform": "custom_api"
    // }

    let sbReq = CkoStringBuilder()!
    jsonReq.emitSb(sbReq)

    rest.addHeader("Content-Type", value: "application/json")

    let sbJson = CkoStringBuilder()!
    success = rest.fullRequestSb("POST", uriPath: "/rest/v10/oauth2/token", requestBody: sbReq, responseBody: sbJson)
    if success != true {
        print("\(rest.lastErrorText!)")
        return
    }

    if rest.responseStatusCode.intValue != 200 {
        print("Received error response code: \(rest.responseStatusCode.intValue)")
        print("Response body:")
        print("\(sbJson.getAsString()!)")
        return
    }

    let json = CkoJsonObject()!
    json.loadSb(sbJson)

    // The following code parses the JSON response.
    // A sample JSON response is shown below the sample code.
    var access_token: String?
    var expires_in: Int
    var token_type: String?
    var scope: Bool
    var refresh_token: String?
    var refresh_expires_in: Int
    var download_token: String?

    access_token = json.string(of: "access_token")
    expires_in = json.int(of: "expires_in").intValue
    token_type = json.string(of: "token_type")
    scope = json.isNull(of: "scope")
    refresh_token = json.string(of: "refresh_token")
    refresh_expires_in = json.int(of: "refresh_expires_in").intValue
    download_token = json.string(of: "download_token")

    // A sample JSON response body that is parsed by the above code:

    // {
    //   "access_token": "c6d495c9-bb25-81d2-5f81-533ef6479f9b",
    //   "expires_in": 3600,
    //   "token_type": "bearer",
    //   "scope": null,
    //   "refresh_token": "cbc40e67-12bc-4b56-a1d9-533ef62f2601",
    //   "refresh_expires_in": 1209600,
    //   "download_token": "cc5d1a9f-6627-3349-96e5-533ef6b1a493"
    // }

    print("Example Completed.")

}