Repository rearrangement

2019-12-05 13:34:34 +03:00
parent 8e348ad0f3
commit 56b9999342
25 changed files with 6 additions and 2 deletions
@@ -0,0 +1,105 @@
+using Google.Apis.Auth.OAuth2;
+using Google.Apis.Auth.OAuth2.Flows;
+using Google.Apis.Auth.OAuth2.Responses;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace YouTube.Authorization
+{
+    public static class AuthorizationHelpers
+    {
+        public static Uri Endpoint => "https://accounts.google.com/o/oauth2/approval".ToUri();
+        const string refreshEndpoint = "https://oauth2.googleapis.com/token";
+        const string tokenEndpoint = "https://www.googleapis.com/oauth2/v4/token";
+
+        public static Uri FormQueryString(ClientSecrets clientSecrets, Uri redirectUri, params string[] scopes)
+        {
+            string clientId = Uri.EscapeDataString(clientSecrets.ClientId);
+            string scopeStr = string.Join(" ", scopes);
+
+            return $"https://accounts.google.com/o/oauth2/auth?client_id={clientId}&redirect_uri={redirectUri.AbsoluteUri}&response_type=code&scope={scopeStr}".ToUri();
+        }
+
+        public static async Task<UserCredential> ExchangeToken(ClientSecrets clientSecrets, string responseToken)
+        {
+            using HttpClient client = new HttpClient();
+
+            Dictionary<string, string> requestBody = new Dictionary<string, string>
+            {
+                { "code", responseToken },
+                //{ "redirect_uri", redirectUrl },
+                { "grant_type", "authorization_code" },
+                { "client_id", clientSecrets.ClientId },
+                { "client_secret", clientSecrets.ClientSecret }
+            };
+
+            HttpResponseMessage response = await client.PostAsync(tokenEndpoint, new FormUrlEncodedContent(requestBody));
+
+            if (!response.IsSuccessStatusCode)
+                return null;
+
+            string responseString = await response.Content.ReadAsStringAsync();
+            dynamic responseData = JsonConvert.DeserializeObject(responseString);
+
+            TokenResponse tokenResponse = new TokenResponse
+            {
+                AccessToken = responseData.access_token,
+                ExpiresInSeconds = responseData.expires_in,
+                RefreshToken = responseData.refresh_token,
+                Scope = responseData.scope,
+                TokenType = responseData.token_type
+            };
+
+            AuthorizationCodeFlow authorizationCodeFlow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer
+            {
+                ClientSecrets = clientSecrets,
+                Scopes = responseData.scope.ToString().Split(' ')
+            });
+
+            UserCredential credential = new UserCredential(authorizationCodeFlow, "user", tokenResponse);
+
+            return credential;
+        }
+
+        public static async Task<UserCredential> RestoreUser(ClientSecrets clientSecrets, string refreshToken)
+        {
+            using HttpClient client = new HttpClient();
+
+            Dictionary<string, string> requestBody = new Dictionary<string, string>
+            {
+                { "client_id", clientSecrets.ClientId },
+                { "client_secret", clientSecrets.ClientSecret },
+                { "refresh_token", refreshToken },
+                { "grant_type", "refresh_token" }
+            };
+
+            HttpResponseMessage response = await client.PostAsync(refreshEndpoint, new FormUrlEncodedContent(requestBody));
+
+            if (!response.IsSuccessStatusCode)
+                return null;
+
+            string responseString = await response.Content.ReadAsStringAsync();
+            dynamic responseData = JsonConvert.DeserializeObject(responseString);
+
+            TokenResponse tokenResponse = new TokenResponse
+            {
+                AccessToken = responseData.access_token,
+                ExpiresInSeconds = responseData.expires_in,
+                RefreshToken = refreshToken,
+                TokenType = responseData.token_type
+            };
+
+            AuthorizationCodeFlow authorizationCodeFlow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer
+            {
+                ClientSecrets = clientSecrets
+            });
+
+            UserCredential credential = new UserCredential(authorizationCodeFlow, "user", tokenResponse);
+
+            return credential;
+        }
+    }
+}