ios - 方形 API + OAuth2 : How do I set my redirect URL to my iOS app?

Question

我正尝试通过 Square 在我的 iOS 应用程序中实现 OAuth2，但它说当我通过弹出的浏览器成功登录时，我的 redirect_uri 出现错误。

我正在使用 OAuthSwift pod。这是我到目前为止设置的 URL 方案，以便重定向应该打开我的 iOS 应用程序:

方形仪表板配置:

应用委托(delegate):

class AppDelegate: UIResponder, UIApplicationDelegate {
  var window: UIWindow?

  func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    print("hollaaaaaaaaaaaaaaaaa") // i never see this printed
    OAuthSwift.handle(url: url)
    return true
  }
}

目标:

打开浏览器的 Controller :

class OAuthViewController: UIViewController {

  @IBAction func signInButtonTapped(_ sender: AnyObject) {
    print("tapped");

    let oauthswift = OAuth2Swift(
        consumerKey:    "my token",
        consumerSecret: "my secret",
        authorizeUrl:   "https://connect.squareup.com/oauth2/authorize?client_id=my_id",
        responseType:   "token"
    )
    oauthswift.authorize(
      withCallbackURL: URL(string: "com.edmund.ios/oauth-callback")!, // doesn't seem to do anything honestly... I think the Square dashboard setting has precedence over this.
      scope: "MERCHANT_PROFILE_READ%20PAYMENTS_READ%20ITEMS_READ%20ORDERS_READ",
      state: "",
      success: { (credential, response, parameters) -> Void in
        print(credential)
      },
      failure: { error in
        print(error.localizedDescription)
      }
    )
  }

}

Answer 1

可以重定向到 ios 应用程序吗？完全可能

在这里，我将指导您实现这一目标的简单方法。方形 oAuth 实现可以通过 2 个简单的简单步骤实现，无需使用任何第三方库。

这种方法的好处

• 您始终停留在应用程序中(因为我们使用应用程序内浏览器)
• 无需在应用程序中添加 URI 架构(因为我们永远不会离开应用程序)

---

• 第 1 步:添加一个 View Controller 并附加一个 WKWebview；
• 第 2 步:加载授权请求 URL 并监听重定向 URI；

重定向发生后，您可以关闭 Controller 并继续使用访问 token 。

---

重定向 URI

您必须在方形仪表板中设置重定向 URI；(示例:“http://localhost/square-oauth-callback”)但您可以自由设置任何有效的 URL。我们在我们的应用程序中监控此 url。

---

在您的应用程序中实现以下代码

import Foundation
import UIKit
import WebKit


class SquareAuthenticationViewController: UIViewController {


    // MARK: Connection Objects
    @IBOutlet weak var webView: WKWebView!



    // MARK: Life Cycle
    override func viewDidLoad() {
        super.viewDidLoad()

        configureView()
        initiateAuthentication()
    }



    func configureView() {

        webView.navigationDelegate = self
    }



    func initiateAuthentication() {

        // Validation
        guard let url = getPath() else {
            return
        }

        // Prepare request
        let request = URLRequest(url: url)
        webView.load(request)
    }



    func getPath() -> URL? {

        let clientId = "Your Suare Application Id"
        let scope = ["MERCHANT_PROFILE_READ",
                     "CUSTOMERS_READ",
                     "CUSTOMERS_WRITE",
                     "EMPLOYEES_READ",
                     "EMPLOYEES_WRITE",
                     "ITEMS_READ",
            "PAYMENTS_READ"].joined(separator: " ")
        let queryClientId = URLQueryItem(name: "client_id" , value: clientId.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed))
        let queryScope = URLQueryItem(name: "scope" , value: scope.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed))

        var components = URLComponents()
        components.scheme = "https"
        components.host = "connect.squareup.com"
        components.path = "/oauth2/authorize"
        components.percentEncodedQueryItems = [queryClientId, queryScope]
        return components.url
    }
}



extension SquareAuthenticationViewController: WKNavigationDelegate {

    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {

        // here we handle internally the callback url and call method that call handleOpenURL (not app scheme used)
        if let url = navigationAction.request.url, url.host == "localhost" , url.path == "/square-oauth-callback" {


            print(url)
            print(url.valueOf("code"))
            //decisionHandler(.cancel)

            /*  Dismiss your view controller as normal
                And proceed with OAuth authorization code
                The code you receive here is not the auth token; For auth token you have to make another api call with the code that you received here and you can procced further
             */

            /*
                Auth Process Flow: https://developer.squareup.com/docs/oauth-api/how-it-works#oauth-access-token-management

                Obtain Auth Token: https://developer.squareup.com/reference/square/oauth-api/obtain-token
             */

        }
        decisionHandler(.allow)
    }

}


extension URL {

    func valueOf(_ queryParamaterName: String) -> String? {

        guard let url = URLComponents(string: self.absoluteString) else { return nil }
        return url.queryItems?.first(where: { $0.name == queryParamaterName })?.value
    }
}