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Description:
vk id
VK ID #
Pure dart impl of OAuth VK ID API.
The module allows to generate 'authorize' link, retrieve OAuth token and user data
General #
Dart SDK >=3.3.0
Supports 2 modes:
Front-end authorization code exchange without SDK: Generating random code_verifier and state at front-end
Back-end authorization code exchange without SDK: Generating random code_verifier and state at back-end and sending code_challenge with state to front-end
Supports VK app platforms:
Android
iOS
Web
Notice: You aren't strictly bound between the hardware and the VK app platform. For example, you can authorize on iOS VK app using Android device
Supports VK ID APIs:
Generating 'auhtorize' link for VK ID with code_verifier or code_challenge
Exchange received from passed user login redirect authorization code for access, refresh, id tokens
Refresh access token through refresh token
Get public (masked) user info
Get full (unmasked) user info
Revoke permissions for authorization
Invalidate authorization (Logout)
Notice: This module doesn't support user authorization. Use webview on flutter context to do it
Setup #
Create and setup VK app
Create VkIDController instance with VK app client ID
If you have previously saved authorization, you can set init oauth and profile data for controller ctor
Authorization #
Generating authorize link #
You may generate authorize link itself (redirect_uri and code_challenge or code_verifier) or request the generated link from back-end
Android, iOS: Redirect uri must be 'vk{clientID}://vk.com/blank.html'. Otherwise VK will throw an error for authorize
Web: Redirect uri must match with uri from VK web app settings. Also you can use default value from Android and iOS apps (vk{clientID}://vk.com/blank.html)
Authorize link generation examples
Android and iOS with code_challenge
final controller = VkIDController(clID: 1234567890);
//Generate code_verifier and code_challenge itself or get code_challenge from back-end
final codeChallenge = "1234567890RND0987654321";
final uri = controller.generateAuthorizeLinkWithCodeChallenge(codeChallenge: codeChallenge);
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Android and iOS with random code_verifier
final controller = VkIDController(clID: 1234567890);
final codeVerifierWithUri = controller.generateAuthorizeLinkWithCodeVerifier();
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Android and iOS with user-defined code_verifier
final controller = VkIDController(clID: 1234567890);
//Generate code_verifier
final codeVerifier = "1234567890RND0987654321";
final codeVerifierWithUri = controller.generateAuthorizeLinkWithCodeVerifier(codeVerifier: codeVerifier);
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Web with code_challenge and user-defined redirect_uri from VK web app settings
final controller = VkIDController(clID: 1234567890);
final redirectUri = "https://site.com/redirect";
//Generate code_verifier and code_challenge itself or get code_challenge from back-end
final codeChallenge = "1234567890RND0987654321";
final uri = controller.generateAuthorizeLinkWithCodeChallenge(codeChallenge: codeChallenge, redirectUri: redirectUri);
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Web with code_challenge and default redirect_uri
final controller = VkIDController(clID: 1234567890);
//Generate code_verifier and code_challenge itself or get code_challenge from back-end
final codeChallenge = "1234567890RND0987654321";
final uri = controller.generateAuthorizeLinkWithCodeChallenge(codeChallenge: codeChallenge);
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Web with random code_verifier and user-defined redirect_uri from VK web app settings
final controller = VkIDController(clID: 1234567890);
final redirectUri = "https://site.com/redirect";
//Generate code_verifier
final codeVerifier = "1234567890RND0987654321";
final codeVerifierWithUri = controller.generateAuthorizeLinkWithCodeVerifier(codeVerifier: codeVerifier);
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Web with random code_verifier and default redirect_uri
final controller = VkIDController(clID: 1234567890);
//Generate code_verifier
final codeVerifier = "1234567890RND0987654321";
final codeVerifierWithUri = controller.generateAuthorizeLinkWithCodeVerifier(codeVerifier: codeVerifier);
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Authorizing on VK ID #
You need flutter context and webview to handle it
Pass authorize link to webview. Also include NavigationDelegate for preventing redirect navigation requests. See example for details
On success authorization you will be redirected by uri from redirect_uri + query parameters
Front-end mode: Block redirect from id.vk.com on webview context (Prevent navigation request). Also you need extract 'code' and 'device_id' parameters from query for exchanging OAuth token
Back-end mode: If VK app is web, don't block redirect. Otherwise block it and process authorization data
Retrieve OAuth token #
Front-end mode: Use controller method to exchange authorization_code for access_token
Back-end mode: Send, if needed, data to back-end for exchanging
VK ID controller refreshes the access token itself if necessary
License
For personal and professional use. You cannot resell or redistribute these repositories in their original state.
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