@amischencko/capacitor-oauth2

v3.0.0

Published

3 years ago

Capacitor OAuth 2 client plugin

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amischenko

capacitor capacitor-plugin oauth2 oauth2-client social-login

Capacitor OAuth 2 client plugin

This a generic OAuth 2 client plugin.

It let you configure the oauth parameters yourself instead of using SDKs. Therefore it is usable with various providers. See providers the community has already used this plugin with.

Maintainers

| Maintainer | GitHub | Social | | -----------| -------| -------| | Michael Oberwasserlechner | moberwasserlechner | @michaelowl_web |

Actively maintained: YES

Install

npm install @capacitor-community/oauth2
npx cap sync

Versions

| Plugin | Minimum Capacitor | Docs | Notes | |--------|-------------------|----------------------------------------------------------------------------------------|--------------------------------| | 3.x | 3.0.0 | (NOT RELEASED YET) README | Breaking changes see Changelog. XCode 12.0 needs this version | | 2.x | 2.0.0 | README | Breaking changes see Changelog. XCode 11.4 needs this version | | 1.x | 1.0.0 | README | |

For further details on what has changed see the CHANGELOG.

Supported flows

See the excellent article about OAuth2 response type combinations.

https://medium.com/@darutk/diagrams-of-all-the-openid-connect-flows-6968e3990660

The plugin on the other will behave differently depending on the existence of certain config parameters:

These parameters are:

accessTokenEndpoint
resourceUrl

e.g.

If responseType=code, pkceDisable=true and accessTokenEndpoint is missing the authorizationCode will be resolve along with the whole authorization response. This only works for the Web and Android. On iOS the used lib does not allows to cancel after the authorization request see #13.

If you just need the id_token JWT you have to set accessTokenEndpoint and resourceUrl to null.

Tested / working flows

These flows are already working and were tested by me.

Implicit flow

responseType: "token"

Code flow + PKCE

...
responseType: "code"
pkceEnable: true
...

Please be aware that some providers (OneDrive, Auth0) allow Code Flow + PKCE only for native apps. Web apps have to use implicit flow.

Important

For security reasons this plugin does/will not support Code Flow without PKCE.

That would include storing your client secret in client code which is highly insecure and not recommended. That flow should only be used on the backend (server).

Configuration

Starting with version 3.0.0, the plugin is registered automatically on all platforms.

Use it

import {OAuth2Client} from "@byteowls/capacitor-oauth2";

@Component({
  template: '<button (click)="onOAuthBtnClick()">Login with OAuth</button>' +
   '<button (click)="onOAuthRefreshBtnClick()">Refresh token</button>' +
   '<button (click)="onLogoutClick()">Logout OAuth</button>'
})
export class SignupComponent {
    refreshToken: string;

    onOAuthBtnClick() {
        OAuth2Client.authenticate(
            oauth2Options
        ).then(response => {
            let accessToken = response["access_token"];
            this.refreshToken = response["refresh_token"];

            // only if you include a resourceUrl protected user values are included in the response!
            let oauthUserId = response["id"];
            let name = response["name"];

            // go to backend
        }).catch(reason => {
            console.error("OAuth rejected", reason);
        });
    }

    // Refreshing tokens only works on iOS/Android for now
    onOAuthRefreshBtnClick() {
      if (!this.refreshToken) {
        console.error("No refresh token found. Log in with OAuth first.");
      }

      OAuth2Client.refreshToken(
        oauth2RefreshOptions
      ).then(response => {
        let accessToken = response["access_token"];
        // Don't forget to store the new refresh token as well!
        this.refreshToken = response["refresh_token"];
        // Go to backend
      }).catch(reason => {
          console.error("Refreshing token failed", reason);
      });
    }

    onLogoutClick() {
            OAuth2Client.logout(
                oauth2LogoutOptions
            ).then(() => {
                // do something
            }).catch(reason => {
                console.error("OAuth logout failed", reason);
            });
        }
}

Options

See the oauth2Options and oauth2RefreshOptions interfaces at https://github.com/moberwasserlechner/capacitor-oauth2/blob/master/src/definitions.ts for details.

Example:

{
      authorizationBaseUrl: "https://accounts.google.com/o/oauth2/auth",
      accessTokenEndpoint: "https://www.googleapis.com/oauth2/v4/token",
      scope: "email profile",
      resourceUrl: "https://www.googleapis.com/userinfo/v2/me",
      web: {
        appId: environment.oauthAppId.google.web,
        responseType: "token", // implicit flow
        accessTokenEndpoint: "", // clear the tokenEndpoint as we know that implicit flow gets the accessToken from the authorizationRequest
        redirectUrl: "http://localhost:4200",
        windowOptions: "height=600,left=0,top=0"
      },
      android: {
        appId: environment.oauthAppId.google.android,
        responseType: "code", // if you configured a android app in google dev console the value must be "code"
        redirectUrl: "com.companyname.appname:/" // package name from google dev console
      },
      ios: {
        appId: environment.oauthAppId.google.ios,
        responseType: "code", // if you configured a ios app in google dev console the value must be "code"
        redirectUrl: "com.companyname.appname:/" // Bundle ID from google dev console
      }
    }

authenticate() and logout()

Overrideable Base Parameter

These parameters are overrideable in every platform

| parameter | default | required | description | since | |---------------------- |--------- |---------- |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |------- | | appId | | yes | aka clientId, serviceId, ... | | | authorizationBaseUrl | | yes | | | | responseType | | yes | | | | redirectUrl | | yes | | 2.0.0 | | accessTokenEndpoint | | | If empty the authorization response incl code is returned. Known issue: Not on iOS! | | | resourceUrl | | | If empty the tokens are return instead. If you need just the id_token you have to set both accessTokenEndpoint and resourceUrl to null or empty ``. | | | pkceEnabled | false | | Enable PKCE if you need it. | | | scope | | | | | | state | | | The plugin always uses a state.If you don't provide one we generate it. | | | additionalParameters | | | Additional parameters for anything you might miss, like none, response_mode. Just create a key value pair.{ "key1": "value", "key2": "value, "response_mode": "value"} | |

Platform Web

Platform Android

Platform iOS

refreshToken()

| parameter | default | required | description | since | |--------------------- |--------- |---------- |------------------------------ |------- | | appId | | yes | aka clientId, serviceId, ... | | | accessTokenEndpoint | | yes | | | | refreshToken | | yes | | | | scope | | | | |

Error Codes

authenticate()

ERR_PARAM_NO_APP_ID ... The appId / clientId is missing. (web, android, ios)
ERR_PARAM_NO_AUTHORIZATION_BASE_URL ... The authorization base url is missing. (web, android, ios)
ERR_PARAM_NO_RESPONSE_TYPE ... The response type is missing. (web, android, ios)
ERR_PARAM_NO_REDIRECT_URL ... The redirect url is missing. (web, android, ios)
ERR_STATES_NOT_MATCH ... The state included in the authorization code request does not match the one in the redirect. Security risk! (web, android, ios)
ERR_AUTHORIZATION_FAILED ... The authorization failed.
ERR_NO_ACCESS_TOKEN ... No access_token found. (web, android)
ERR_NO_AUTHORIZATION_CODE ... No authorization code was returned in the redirect response. (web, android, ios)
USER_CANCELLED ... The user cancelled the login flow. (web, android, ios)
ERR_CUSTOM_HANDLER_LOGIN ... Login through custom handler class failed. See logs and check your code. (android, ios)
ERR_CUSTOM_HANDLER_LOGOUT ... Logout through custom handler class failed. See logs and check your code. (android, ios)
ERR_ANDROID_NO_BROWSER ... No suitable browser could be found! (Android)
ERR_ANDROID_RESULT_NULL ... The auth result is null. The intent in the ActivityResult is null. This might be a valid state but make sure you configured Android part correctly! See Platform Android
ERR_GENERAL ... A unspecific error. Check the logs to see want exactly happened. (web, android, ios)

refreshToken()

ERR_PARAM_NO_APP_ID ... The appId / clientId is missing. (android, ios)
ERR_PARAM_NO_ACCESS_TOKEN_ENDPOINT ... The access token endpoint url is missing. It is only needed on refresh, on authenticate it is optional. (android, ios)
ERR_PARAM_NO_REFRESH_TOKEN ... The refresh token is missing. (android, ios)
ERR_NO_ACCESS_TOKEN ... No access_token found. (web, android)
ERR_GENERAL ... A unspecific error. Check the logs to see want exactly happened. (android, ios)

Platform: Web/PWA

This implementation just opens a browser window to let users enter their credentials.

As there is no provider SDK used to accomplish OAuth, no additional javascript files must be loaded and so there is no performance impact using this plugin in a web application.

Register plugin

On Web/PWA the plugin is registered automatically by Capacitor.

Platform: Android

Prerequisite: Capacitor Android Docs

Register plugin

On Android the plugin is registered automatically by Capacitor.

Android Default Config

Skip this, if you use a OAuth2CustomHandler

android/app/src/main/res/AndroidManifest.xml

The AndroidManifest.xml in your Capacitor Android project already contains

    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="@string/custom_url_scheme" />
    </intent-filter>

Find the following line in your AndroidManifest.xml

<data android:scheme="@string/custom_url_scheme" />

and change it to

<data android:scheme="@string/custom_url_scheme" android:host="oauth" />

Note: Actually any value for android:host will do. It does not has to be oauth.

This will fix an issues within the oauth workflow when the application is shown twice. See Issue #15 for details what happens.

android/app/src/main/res/values/strings.xml

In your strings.xml change the custom_url_scheme string to your actual scheme value. Do NOT include ://oauth/redirect or other endpoint urls here!

<string name="custom_url_scheme">com.example.yourapp</string>

<!-- wrong -->
<!-- <string name="custom_url_scheme">com.example.yourapp://endpoint/path</string> -->

android/app/build.gradle

android.defaultConfig.manifestPlaceholders = [
  // change to the 'custom_url_scheme' value in your strings.xml. They need to be the same. e.g.
  "appAuthRedirectScheme": "com.example.yourapp"
]

Troubleshooting

If your appAuthRedirectScheme does not get recognized because you are using a library that replaces it (e.g.: onesignal-cordova-plugin), you will have to add it to your buildTypes like the following:

android.buildTypes.debug.manifestPlaceholders =  [
  'appAuthRedirectScheme': '<@string/custom_url_scheme from string.xml>' // e.g. com.companyname.appname
]
android.buildTypes.release.manifestPlaceholders = [
  'appAuthRedirectScheme': '<@string/custom_url_scheme from string.xml>' // e.g. com.companyname.appname
]

"ERR_ANDROID_RESULT_NULL": See Issue #52 for details. I cannot reproduce this behaviour. Moreover there might be situation this state is valid. In other cases e.g. in the linked issue a configuration tweak fixed it.

Custom OAuth Handler

Some OAuth provider (Facebook) force developers to use their SDK on Android.

This plugin should be as generic as possible so I don't want to include provider specific dependencies.

Therefore I created a mechanism which let developers integrate custom SDK features in this plugin. Simply configure a full qualified classname in the option property android.customHandlerClass. This class has to implement com.byteowls.capacitor.oauth2.handler.OAuth2CustomHandler.

See a full working example below!

Platform: iOS

Register plugin

On iOS the plugin is registered automatically by Capacitor.

iOS Default Config

Skip this, if you use a OAuth2CustomHandler

Open ios/App/App/Info.plist in XCode (Context menu -> Open as -> Source) and add the value of redirectUrl from your config without :/ like that

	<key>CFBundleURLTypes</key>
	<array>
		<dict>
			<key>CFBundleURLSchemes</key>
			<array>
				<string>com.companyname.appname</string>
			</array>
		</dict>
	</array>

Custom OAuth Handler

Some OAuth provider (e.g. Facebook) force developers to use their SDK on iOS.

This plugin should be as generic as possible so I don't want to include provider specific dependencies.

Therefore I created a mechanism which let developers integrate custom SDK features in this plugin. Simply configure a the class name in the option property ios.customHandlerClass. This class has to implement ByteowlsCapacitorOauth2.OAuth2CustomHandler.

See a full working example below!

Platform: Electron

No timeline.

List of Providers

These are some of the providers that can be configured with this plugin. I'm happy to add others ot the list, if you let me know.

| Name | Example (config,...) | Notes | |-----------|------------------------|-------| | Google | see below | | | Facebook | see below | | | Azure B2C | see below| | | Apple | see below | ios only |

Examples

Apple

iOS 13+

Minimum config

appleLogin() {
  OAuth2Client.authenticate({
    appId: "xxxxxxxxx",
    authorizationBaseUrl: "https://appleid.apple.com/auth/authorize",
  });
}

The plugin requires authorizationBaseUrl as it triggers the native support and because it is needed for other platforms anyway. Those platforms are not supported yet.

appId is required as well for internal, generic reasons and any not blank value is fine.

It is also possible to control the scope although Apple only supports email and/or fullName. Add siwaUseScope: true to the ios block and then you can use scope: "fullName", scope: "email" or both but the latter is the default one if siwaUseScope is not set or false.

appleLogin() {
  OAuth2Client.authenticate({
    appId: "xxxxxxxxx",
    authorizationBaseUrl: "https://appleid.apple.com/auth/authorize",
    ios: {
      siwaUseScope: true,
      scope: "fullName"
    }
  });
}

As "Signin with Apple" is only supported since iOS 13 you should show the according button only in that case.

In Angular do sth like

import {Component, OnInit} from '@angular/core';
import {Device, DeviceInfo} from "@capacitor/device";
import {OAuth2Client} from "@byteowls/capacitor-oauth2";

@Component({
  templateUrl: './siwa.component.html'
})
export class SiwaComponent implements OnInit {

  ios: boolean;
  siwaSupported: boolean;
  deviceInfo: DeviceInfo;

  async ngOnInit() {
      this.deviceInfo = await Device.getInfo();
      this.ios = this.deviceInfo.platform === "ios";
      if (this.ios) {
          const majorVersion: number = +this.deviceInfo.osVersion.split(".")[0];
          this.siwaSupported = majorVersion >= 13;
      }
  }
}

And show the button only if siwaSupported is true.

The response contains these fields:

"id"
"given_name"
"family_name"
"email"
"real_user_status"
"state"
"id_token"
"code"

iOS <12

not supported

PWA

not supported

Android

not supported

Azure B2C

In case of problems please read #91 and #96

See this example repo by @loonix.

PWA

See these 2 configs that should work.

It's important to use the urls you see in the Azure config for the specific platform.

import {OAuth2Client} from "@byteowls/capacitor-oauth2";

azureLogin() {
  OAuth2Client.authenticate({
    appId: "xxxxxxxxx",
    authorizationBaseUrl: "https://tenantb2c.b2clogin.com/tfp/tenantb2c.onmicrosoft.com/B2C_1_SignUpAndSignIn/oauth2/v2.0/authorize",
    accessTokenEndpoint: "",
    scope: "openid offline_access https://tenantb2c.onmicrosoft.com/capacitor-api/demo.read",
    responseType: "token",
    web: {
        redirectUrl: "http://localhost:8100/auth"
    },
    android: {
        pkceEnabled: true,
        responseType: "code",
        redirectUrl: "com.tenant.app://oauth/auth", // Use the value from Azure config. Platform "Android"
        accessTokenEndpoint: "https://tenantb2c.b2clogin.com/tfp/tenantb2c.onmicrosoft.com/B2C_1_SignUpAndSignIn/oauth2/v2.0/token",
        handleResultOnNewIntent: true,
        handleResultOnActivityResult: true
    },
    ios: {
        pkceEnabled: true,
        responseType: "code",
        redirectUrl: "msauth.BUNDLE_ID://oauth", // Use the value from Azure config. Platform "iOS/Mac"
        accessTokenEndpoint: "https://tenantb2c.b2clogin.com/tfp/tenantb2c.onmicrosoft.com/B2C_1_SignUpAndSignIn/oauth2/v2.0/token",
    }
  });
}

import {OAuth2Client} from "@byteowls/capacitor-oauth2";

azureLogin() {
  OAuth2Client.authenticate({
    appId: 'XXXXXXXXXX-XXXXXXXXXX-XXXXXXXXX',
    authorizationBaseUrl: 'https://TENANT.b2clogin.com/tfp/TENANT.onmicrosoft.com/B2C_1_policy-signin-signup-web/oauth2/v2.0/authorize',
    accessTokenEndpoint: '',
    scope: 'https://XXXXXXX.onmicrosoft.com/TestApi4/demo.read',
    responseType: 'token',
    web: {
      redirectUrl: 'http://localhost:8100/'
    },
    android: {
      pkceEnabled: true,
      responseType: 'code',
      redirectUrl: 'com.company.project://oauth/redirect',
      accessTokenEndpoint: 'https://TENANT.b2clogin.com/TENANT.onmicrosoft.com/B2C_1_policy-signin-signup-web',
      handleResultOnNewIntent: true,
      handleResultOnActivityResult: true
    },
    ios: {
      pkceEnabled: true,
      responseType: 'code',
      redirectUrl: 'com.company.project://oauth',
      accessTokenEndpoint: 'https://TENANT.b2clogin.com/TENANT.onmicrosoft.com/B2C_1_policy-signin-signup-web',
    }
  });
}

Android

See Android Default Config

iOS

Open Info.plist in XCode by Right Click on that file -> Open as -> Source Code. Note: XCode does not "like" files opened and changed externally.

	<key>CFBundleURLTypes</key>
	<array>
		<dict>
			<key>CFBundleURLSchemes</key>
			<array>
				<string>msauth.BUNDLE_ID</string>
			</array>
		</dict>
	</array>

Do not enter :// and part of your redirect url after those chars.

Google

PWA

import {OAuth2Client} from "@byteowls/capacitor-oauth2";

googleLogin() {
    OAuth2Client.authenticate({
      authorizationBaseUrl: "https://accounts.google.com/o/oauth2/auth",
      accessTokenEndpoint: "https://www.googleapis.com/oauth2/v4/token",
      scope: "email profile",
      resourceUrl: "https://www.googleapis.com/userinfo/v2/me",
      web: {
        appId: environment.oauthAppId.google.web,
        responseType: "token", // implicit flow
        accessTokenEndpoint: "", // clear the tokenEndpoint as we know that implicit flow gets the accessToken from the authorizationRequest
        redirectUrl: "http://localhost:4200",
        windowOptions: "height=600,left=0,top=0"
      },
      android: {
        appId: environment.oauthAppId.google.android,
        responseType: "code", // if you configured a android app in google dev console the value must be "code"
        redirectUrl: "com.companyname.appname:/" // package name from google dev console
      },
      ios: {
        appId: environment.oauthAppId.google.ios,
        responseType: "code", // if you configured a ios app in google dev console the value must be "code"
        redirectUrl: "com.companyname.appname:/" // Bundle ID from google dev console
      }
    }).then(resourceUrlResponse => {
      // do sth e.g. check with your backend
    }).catch(reason => {
      console.error("Google OAuth rejected", reason);
    });
  }

Android

See Android Default Config

iOS

See iOS Default Config

Facebook

PWA

import {OAuth2Client} from "@byteowls/capacitor-oauth2";

facebookLogin() {
    let fbApiVersion = "2.11";
    OAuth2Client.authenticate({
      appId: "YOUR_FACEBOOK_APP_ID",
      authorizationBaseUrl: "https://www.facebook.com/v" + fbApiVersion + "/dialog/oauth",
      resourceUrl: "https://graph.facebook.com/v" + fbApiVersion + "/me",
      web: {
        responseType: "token",
        redirectUrl: "http://localhost:4200",
        windowOptions: "height=600,left=0,top=0"
      },
      android: {
        customHandlerClass: "com.companyname.appname.YourAndroidFacebookOAuth2Handler",
      },
      ios: {
        customHandlerClass: "App.YourIOsFacebookOAuth2Handler",
      }
    }).then(resourceUrlResponse => {
      // do sth e.g. check with your backend
    }).catch(reason => {
      console.error("FB OAuth rejected", reason);
    });
  }

Android and iOS

Since October 2018 Strict Mode for Redirect Urls is always on.

Use Strict Mode for Redirect URIs

Only allow redirects that use the Facebook SDK or that exactly match the Valid OAuth Redirect URIs. Strongly recommended.

Before that it was able to use fb<your_app_id>:/authorize in a Android or iOS app and get the accessToken.

Unfortunately now we have to use the SDK for Facebook Login.

I don't want to have a dependency to facebook for users, who don't need Facebook OAuth.

To address this problem I created a integration with custom code in your app customHandlerClass

Android

See https://developers.facebook.com/docs/facebook-login/android/ for more background on how to configure Facebook in your Android app.

Add implementation 'com.facebook.android:facebook-login:4.36.0' to android/app/build.gradle as dependency.
Add to string.xml

    <string name="facebook_app_id"><YOUR_FACEBOOK_APP_ID></string>
    <string name="fb_login_protocol_scheme">fb<YOUR_FACEBOOK_APP_ID></string>

Add to AndroidManifest.xml

<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>

<activity android:name="com.facebook.FacebookActivity"
  android:configChanges=
    "keyboard|keyboardHidden|screenLayout|screenSize|orientation"
  android:label="@string/app_name" />

<activity android:name="com.facebook.CustomTabActivity" android:exported="true">
  <intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data android:scheme="@string/fb_login_protocol_scheme" />
  </intent-filter>
</activity>

Create a custom handler class


package com.companyname.appname;

import android.app.Activity;

import com.byteowls.capacitor.oauth2.handler.AccessTokenCallback;
import com.byteowls.capacitor.oauth2.handler.OAuth2CustomHandler;
import com.companyname.appname.MainActivity;
import com.facebook.AccessToken;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.login.DefaultAudience;
import com.facebook.login.LoginBehavior;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;
import com.getcapacitor.PluginCall;

import java.util.Collections;

public class YourAndroidFacebookOAuth2Handler implements OAuth2CustomHandler {

  @Override
  public void getAccessToken(Activity activity, PluginCall pluginCall, final AccessTokenCallback callback) {
    AccessToken accessToken = AccessToken.getCurrentAccessToken();
    if (AccessToken.isCurrentAccessTokenActive()) {
      callback.onSuccess(accessToken.getToken());
    } else {
      LoginManager l = LoginManager.getInstance();
      l.logInWithReadPermissions(activity, Collections.singletonList("public_profile"));
      l.setLoginBehavior(LoginBehavior.WEB_ONLY);
      l.setDefaultAudience(DefaultAudience.NONE);
      LoginManager.getInstance().registerCallback(((MainActivity) activity).getCallbackManager(), new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
          callback.onSuccess(loginResult.getAccessToken().getToken());
        }

        @Override
        public void onCancel() {
          callback.onCancel();
        }

        @Override
        public void onError(FacebookException error) {
          callback.onCancel();
        }
      });
    }

  }

  @Override
  public boolean logout(Activity activity, PluginCall pluginCall) {
    LoginManager.getInstance().logOut();
    return true;
  }
}

Change your MainActivity like

public class MainActivity extends BridgeActivity {

  private CallbackManager callbackManager;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // Initialize Facebook SDK
    FacebookSdk.sdkInitialize(this.getApplicationContext());
    callbackManager = CallbackManager.Factory.create();
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (callbackManager.onActivityResult(requestCode, resultCode, data)) {
      return;
    }
  }

  public CallbackManager getCallbackManager() {
    return callbackManager;
  }

}

iOS

See https://developers.facebook.com/docs/swift/getting-started and https://developers.facebook.com/docs/swift/login

Add Facebook pods to ios/App/Podfile and run pod install afterwards

platform :ios, '12.0'
use_frameworks!

# workaround to avoid Xcode caching of Pods that requires
# Product -> Clean Build Folder after new Cordova plugins installed
# Requires CocoaPods 1.6 or newer
install! 'cocoapods', :disable_input_output_paths => true

def capacitor_pods
  pod 'Capacitor', :path => '../../node_modules/@capacitor/ios'
  pod 'CapacitorCordova', :path => '../../node_modules/@capacitor/ios'
  pod 'ByteowlsCapacitorOauth2', :path => '../../node_modules/@byteowls/capacitor-oauth2'
  # core plugins
  pod 'CapacitorApp', :path => '../../node_modules/@capacitor/app'
  pod 'CapacitorDevice', :path => '../../node_modules/@capacitor/device'
  pod 'CapacitorKeyboard', :path => '../../node_modules/@capacitor/keyboard'
  pod 'CapacitorSplashScreen', :path => '../../node_modules/@capacitor/splash-screen'
  pod 'CapacitorStatusBar', :path => '../../node_modules/@capacitor/status-bar'
end

target 'App' do
  capacitor_pods
  # Add your Pods here
  pod 'FacebookCore'
  pod 'FacebookLogin'
end

Add some Facebook configs to your Info.plist

<key>CFBundleURLTypes</key>
<array>
  <dict>
    <key>CFBundleURLSchemes</key>
    <array>
      <string>fb{your-app-id}</string>
    </array>
  </dict>
</array>
<key>FacebookAppID</key>
<string>{your-app-id}</string>
<key>FacebookDisplayName</key>
<string>{your-app-name}</string>
<key>LSApplicationQueriesSchemes</key>
<array>
  <string>fbapi</string>
  <string>fb-messenger-share-api</string>
  <string>fbauth2</string>
  <string>fbshareextension</string>
</array>

Create a custom handler class

import Foundation
import FacebookCore
import FacebookLogin
import Capacitor
import ByteowlsCapacitorOauth2

@objc class YourIOsFacebookOAuth2Handler: NSObject, OAuth2CustomHandler {

    required override init() {
    }

    func getAccessToken(viewController: UIViewController, call: CAPPluginCall, success: @escaping (String) -> Void, cancelled: @escaping () -> Void, failure: @escaping (Error) -> Void) {
        if let accessToken = AccessToken.current {
            success(accessToken.tokenString)
        } else {
            DispatchQueue.main.async {
                let loginManager = LoginManager()
                // I only need the most basic permissions but others are available
                loginManager.logIn(permissions: [ .publicProfile ], viewController: viewController) { result in
                    switch result {
                    case .success(_, _, let accessToken):
                        success(accessToken.tokenString)
                    case .failed(let error):
                        failure(error)
                    case .cancelled:
                        cancelled()
                    }
                }
            }
        }
    }

    func logout(viewController: UIViewController, call: CAPPluginCall) -> Bool {
        let loginManager = LoginManager()
        loginManager.logOut()
        return true
    }
}

This handler will be automatically discovered up by the plugin and handles the login using the Facebook SDK. See https://developers.facebook.com/docs/swift/login/#custom-login-button for details.

The users that have redirect problem after success grant add the following code to ios/App/App/AppDelegate.swift. This code correctly delegate the FB redirect url to be managed by Facebook SDK.

import UIKit
import FacebookCore
import FacebookLogin
import Capacitor

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    // other methods

    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
      // Called when the app was launched with a url. Feel free to add additional processing here,
      // but if you want the App API to support tracking app url opens, make sure to keep this call

      if let scheme = url.scheme, let host = url.host {
        let appId: String = Settings.appID!
        if scheme == "fb\(appId)" && host == "authorize" {
          return ApplicationDelegate.shared.application(app, open: url, options: options)
        }
      }

      return CAPBridge.handleOpenUrl(url, options)
    }

    // other methods
}

Contribute

See Contribution Guidelines.

Changelog

See CHANGELOG.

License

MIT. See LICENSE.

BYTEOWLS Software & Consulting

This plugin is powered by BYTEOWLS Software & Consulting.

If you need extended support for this project like critical changes or releases ahead of schedule. Feel free to contact us for a consulting offer.

Disclaimer

We have no business relation to Ionic.

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Capacitor OAuth 2 client plugin

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Code flow + PKCE

Important

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Options

authenticate() and logout()

refreshToken()

Error Codes

authenticate()

refreshToken()

Platform: Web/PWA

Register plugin

Platform: Android

Register plugin

Android Default Config

android/app/src/main/res/AndroidManifest.xml

android/app/src/main/res/values/strings.xml

android/app/build.gradle

Custom OAuth Handler

Platform: iOS

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iOS Default Config

Custom OAuth Handler

Platform: Electron

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