我正在基于Google+ API进行解释,它使用Gmail ID登录。因此,您将验证您的用户是否可以使用 Gmail 登录。
1:您需要开启Google+ API
:
2:开启Google+ API后,您需要添加新的Client ID
.
Step 2
Step 3
在步骤 2 中,当您添加重定向 URL 时,您需要添加您希望用户重定向到的页面的网站 URL。
创建 Web 应用程序的客户端 ID 后。
然后在您的应用程序中,您需要添加两个包
1: Newtonsoft.Json
2: Microsoft.Net.Http
现在添加这个命名空间;
using Newtonsoft.Json;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
现在,首先在代码中在页面顶部声明此变量;
protected string googleplus_client_id = "458878619548-khuatamj3qpiccnsm4q6dbulf13jumva.apps.googleusercontent.com"; // Replace this with your Client ID
protected string googleplus_client_secret = "4hiVJYlomswRd_PV5lyNQlfN"; // Replace this with your Client Secret
protected string googleplus_redirect_url = "http://localhost:2443/Index.aspx"; // Replace this with your Redirect URL; Your Redirect URL from your developer.google application should match this URL.
protected string Parameters;
然后在页面加载事件中;
protected void Page_Load(object sender, EventArgs e)
{
if ((Session.Contents.Count > 0) && (Session["loginWith"] != null) && (Session["loginWith"].ToString() == "google"))
{
try
{
var url = Request.Url.Query;
if (url != "")
{
string queryString = url.ToString();
char[] delimiterChars = { '=' };
string[] words = queryString.Split(delimiterChars);
string code = words[1];
if (code != null)
{
//get the access token
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create("https://accounts.google.com/o/oauth2/token");
webRequest.Method = "POST";
Parameters = "code=" + code + "&client_id=" + googleplus_client_id + "&client_secret=" + googleplus_client_secret + "&redirect_uri=" + googleplus_redirect_url + "&grant_type=authorization_code";
byte[] byteArray = Encoding.UTF8.GetBytes(Parameters);
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.ContentLength = byteArray.Length;
Stream postStream = webRequest.GetRequestStream();
// Add the post data to the web request
postStream.Write(byteArray, 0, byteArray.Length);
postStream.Close();
WebResponse response = webRequest.GetResponse();
postStream = response.GetResponseStream();
StreamReader reader = new StreamReader(postStream);
string responseFromServer = reader.ReadToEnd();
GooglePlusAccessToken serStatus = JsonConvert.DeserializeObject<GooglePlusAccessToken>(responseFromServer);
if (serStatus != null)
{
string accessToken = string.Empty;
accessToken = serStatus.access_token;
if (!string.IsNullOrEmpty(accessToken))
{
// This is where you want to add the code if login is successful.
// getgoogleplususerdataSer(accessToken);
}
}
}
}
}
catch (Exception ex)
{
//throw new Exception(ex.Message, ex);
Response.Redirect("index.aspx");
}
}
}
现在将调用 google API 的事件
protected void Google_Click(object sender, EventArgs e)
{
var Googleurl = "https://accounts.google.com/o/oauth2/auth?response_type=code&redirect_uri=" + googleplus_redirect_url + "&scope=https://www.googleapis.com/auth/userinfo.email%20https://www.googleapis.com/auth/userinfo.profile&client_id=" + googleplus_client_id;
Session["loginWith"] = "google";
Response.Redirect(Googleurl);
}
添加这个GooglePlusAccessToken
class;
// Google
public class GooglePlusAccessToken
{
public string access_token { get; set; }
public string token_type { get; set; }
public int expires_in { get; set; }
public string id_token { get; set; }
public string refresh_token { get; set; }
}
也可以拨打其他电话oauth API
与Access Token
检索一些用户信息。
private async void getgoogleplususerdataSer(string access_token)
{
try
{
HttpClient client = new HttpClient();
var urlProfile = "https://www.googleapis.com/oauth2/v1/userinfo?access_token=" + access_token;
client.CancelPendingRequests();
HttpResponseMessage output = await client.GetAsync(urlProfile);
if (output.IsSuccessStatusCode)
{
string outputData = await output.Content.ReadAsStringAsync();
GoogleUserOutputData serStatus = JsonConvert.DeserializeObject<GoogleUserOutputData>(outputData);
if (serStatus != null)
{
// You will get the user information here.
}
}
}
catch (Exception ex)
{
//catching the exception
}
}
public class GoogleUserOutputData
{
public string id { get; set; }
public string name { get; set; }
public string given_name { get; set; }
public string email { get; set; }
public string picture { get; set; }
}
希望这就是您正在寻找的,我实现了这个并且运行得很好。
希望这可以帮助。