Skip to content

Gea-Suan Lin's BLOG

幹壞事是進步最大的原動力

Gea-Suan Lin's BLOG

Tag: signin

網頁版 Google OAuth 的作法

早期的作法是「Integrating Google Sign-In into your web app」這個,但官方已經標注 deprecated 了,在官方的文件上面可以看到對應的警告說明,現在雖然會動,但之後應該會關掉:

Warning: The support of Google Sign-In JavaScript platform library for Web is set to be deprecated after March 31, 2023. The solutions in this guide are based on this library and therefore also deprecated.

本來一開始是走「OAuth 2.0 for Client-side Web Applications」這個,這份文件會教你引入 Google 提供的 javascript library,也就是 https://apis.google.com/js/api.js 這份,但其實沒必要這樣用... 先不管會多吃多少資源,比較敏感的是隱私問題 (像是透過 3rd-party cookie 追蹤)。

後來研究出來比較好的方法是走「Using OAuth 2.0 for Web Server Applications」這邊提到的方式,就算是 javascript 也可以建立出來,像是這樣:

(() => {
  const el = document.getElementById('glogin');
  el.addEventListener('click', () => {
    document.location = 'https://accounts.google.com/o/oauth2/v2/auth?' +
      'client_id=x-x.apps.googleusercontent.com' +
      '&redirect_uri=https://test.example.com/google_redirect_uri.php' +
      '&response_type=code' +
      '&scope=profile+email';
  });
})();

然後這邊的接收端 (google_redirect_uri.php) 是讓 Google 授權後用 redirect 的方式把對應的認證變數 code 帶過來,這邊是用 PHP 實做,有兩個步驟:

  • 先用 POST 打 https://oauth2.googleapis.com/token 取得 (換得) access token,也就是 access_token。
  • 再用 GET 打 https://www.googleapis.com/oauth2/v3/userinfo (帶上一個取得的 access token 進去) 取得使用者資料。

scope 裡如果沒有 email 的話,最後就不會拿到 email,但 SSO 應用應該會需要這個資訊,所以範例裡面還是放進去...

這邊是故意儘量用 PHP 內建的 library 實做,但應該不算複雜,換用 Guzzle 或是用其他語言應該算簡單:

    $qs = http_build_query([
        'code' => $_GET['code'],
        'client_id' => 'x-x.apps.googleusercontent.com',
        'client_secret' => 'x',
        'redirect_uri' => 'https://test.example.com/google_redirect_uri.php',
        'grant_type' => 'authorization_code',
    ]);

    $url = 'https://oauth2.googleapis.com/token';
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $qs);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $res = curl_exec($ch);
    curl_close($ch);

    $data = json_decode($res);

    $atoken = $data->access_token;

    $url = 'https://www.googleapis.com/oauth2/v3/userinfo';
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HTTPHEADER, ["Authorization: Bearer ${atoken}"]);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $res = curl_exec($ch);
    curl_close($ch);

最後的資料就在 $res 裡面,想要看可以直接用 var_dump($res); 看。

這樣只有使用者真的要用 Google SSO 時才會有 request 進到 Google 伺服器。

Author Gea-Suan LinPosted on April 24, 2023April 24, 2023Categories Computer, Murmuring, Network, Programming, ServiceTags app, application, client, google, html, in, javascript, js, oauth, server, sign, signin, sso, webLeave a comment on 網頁版 Google OAuth 的作法
  • Live 記錄
  • 訂閱 (subscribe)
  • 關於我 (about me)

Recent Comments

  • brli on 在 Raspberry Pi (32-bit) 上安裝 Tor
  • gugod on scp -3:直接對兩個 remote host 複製檔案
  • xnum on Golang 將改變常見的 closure 地雷
  • mason on PostgreSQL 的 meme 與對應的解釋
  • anonymous on 用兩個禮拜 Kagi 的心得

Archives

  • October 2023 (4)
  • September 2023 (30)
  • August 2023 (39)
  • July 2023 (24)
  • June 2023 (30)
  • May 2023 (32)
  • April 2023 (29)
  • March 2023 (30)
  • February 2023 (22)
  • January 2023 (19)
  • December 2022 (22)
  • November 2022 (32)
  • October 2022 (36)
  • September 2022 (18)
  • August 2022 (38)
  • July 2022 (36)
  • June 2022 (28)
  • May 2022 (31)
  • April 2022 (35)
  • March 2022 (43)
  • February 2022 (40)
  • January 2022 (22)
  • December 2021 (28)
  • November 2021 (26)
  • October 2021 (31)
  • September 2021 (44)
  • August 2021 (24)
  • July 2021 (28)
  • June 2021 (31)
  • May 2021 (32)
  • April 2021 (24)
  • March 2021 (51)
  • February 2021 (34)
  • January 2021 (29)
  • December 2020 (38)
  • November 2020 (42)
  • October 2020 (40)
  • September 2020 (23)
  • August 2020 (32)
  • July 2020 (35)
  • June 2020 (22)
  • May 2020 (36)
  • April 2020 (33)
  • March 2020 (18)
  • February 2020 (28)
  • January 2020 (34)
  • December 2019 (43)
  • November 2019 (22)
  • October 2019 (24)
  • September 2019 (33)
  • August 2019 (30)
  • July 2019 (40)
  • June 2019 (37)
  • May 2019 (39)
  • April 2019 (30)
  • March 2019 (62)
  • February 2019 (35)
  • January 2019 (38)
  • December 2018 (36)
  • November 2018 (45)
  • October 2018 (19)
  • September 2018 (37)
  • August 2018 (28)
  • July 2018 (29)
  • June 2018 (25)
  • May 2018 (37)
  • April 2018 (36)
  • March 2018 (30)
  • February 2018 (57)
  • January 2018 (53)
  • December 2017 (84)
  • November 2017 (117)
  • October 2017 (93)
  • September 2017 (60)
  • August 2017 (37)
  • July 2017 (41)
  • June 2017 (37)
  • May 2017 (59)
  • April 2017 (55)
  • March 2017 (55)
  • February 2017 (35)
  • January 2017 (42)
  • December 2016 (48)
  • November 2016 (32)
  • October 2016 (35)
  • September 2016 (78)
  • August 2016 (69)
  • July 2016 (19)
  • June 2016 (42)
  • May 2016 (61)
  • April 2016 (51)
  • March 2016 (74)
  • February 2016 (87)
  • January 2016 (31)
  • December 2015 (36)
  • November 2015 (61)
  • October 2015 (72)
  • September 2015 (53)
  • August 2015 (42)
  • July 2015 (38)
  • June 2015 (30)
  • May 2015 (18)
  • April 2015 (57)
  • March 2015 (41)
  • February 2015 (50)
  • January 2015 (35)
  • December 2014 (50)
  • November 2014 (56)
  • October 2014 (41)
  • September 2014 (37)
  • August 2014 (37)
  • July 2014 (28)
  • June 2014 (50)
  • May 2014 (32)
  • April 2014 (46)
  • March 2014 (38)
  • February 2014 (29)
  • January 2014 (52)
  • December 2013 (50)
  • November 2013 (45)
  • October 2013 (40)
  • September 2013 (48)
  • August 2013 (22)
  • July 2013 (25)
  • June 2013 (13)
  • May 2013 (16)
  • April 2013 (28)
  • March 2013 (37)
  • February 2013 (36)
  • January 2013 (57)
  • December 2012 (44)
  • November 2012 (10)
  • October 2012 (12)
  • September 2012 (21)
  • August 2012 (21)
  • July 2012 (25)
  • June 2012 (8)
  • May 2012 (10)
  • April 2012 (11)
  • March 2012 (10)
  • February 2012 (11)
  • January 2012 (5)
  • December 2011 (13)
  • November 2011 (12)
  • October 2011 (10)
  • September 2011 (7)
  • August 2011 (5)
  • July 2011 (11)
  • June 2011 (21)
  • May 2011 (22)
  • April 2011 (36)
  • March 2011 (43)
  • February 2011 (23)
  • January 2011 (24)
  • December 2010 (34)
  • November 2010 (19)
  • October 2010 (16)
  • September 2010 (15)
  • August 2010 (10)
  • July 2010 (12)
  • June 2010 (3)
  • May 2010 (3)
  • April 2010 (4)
  • March 2010 (8)
  • February 2010 (14)
  • January 2010 (13)
  • December 2009 (16)
  • November 2009 (28)
  • October 2009 (24)
  • September 2009 (12)
  • August 2009 (7)
  • July 2009 (10)
  • June 2009 (11)
  • May 2009 (22)
  • April 2009 (21)
  • March 2009 (18)
  • February 2009 (7)
  • January 2009 (32)
  • December 2008 (19)
  • November 2008 (12)
  • October 2008 (15)
  • September 2008 (14)
  • August 2008 (15)
  • July 2008 (18)
  • June 2008 (20)
  • May 2008 (19)
  • April 2008 (27)
  • March 2008 (22)
  • February 2008 (21)
  • January 2008 (15)
  • December 2007 (22)
  • November 2007 (17)
  • October 2007 (29)
  • September 2007 (31)
  • August 2007 (34)
  • July 2007 (31)
  • June 2007 (36)
  • May 2007 (23)
  • April 2007 (22)
  • March 2007 (30)
  • February 2007 (50)
  • January 2007 (75)
  • December 2006 (48)
  • November 2006 (59)
  • October 2006 (89)
  • September 2006 (29)
  • August 2006 (48)
  • July 2006 (14)
  • June 2006 (35)
  • May 2006 (62)
  • April 2006 (63)
  • March 2006 (72)
  • February 2006 (83)
  • January 2006 (56)
  • December 2005 (46)
  • November 2005 (60)
  • October 2005 (27)
  • September 2005 (54)
  • August 2005 (83)

Tags

  • amazon
  • api
  • aws
  • browser
  • cdn
  • certificate
  • chrome
  • cloud
  • cloudflare
  • cpu
  • data
  • database
  • db
  • dns
  • ec2
  • engine
  • facebook
  • firefox
  • github
  • google
  • https
  • image
  • instance
  • javascript
  • js
  • linux
  • mysql
  • network
  • open
  • percona
  • performance
  • php
  • pricing
  • privacy
  • rdbms
  • security
  • server
  • service
  • source
  • speed
  • ssl
  • storage
  • tls
  • ubuntu
  • web

Blogroll

  • Ashley's BLOG
  • Gea-Suan Lin’s BLOG for Class^H^H^H^H^H ACG
  • Gea-Suan Lin’s BLOG for Networking
  • Gea-Suan Lin’s BLOG for Work
  • Gea-Suan Lin's Blog
  • Gea-Suan Lin's Wiki
  • Zonble
  • 蔡依林的部落格
Gea-Suan Lin's BLOG Proudly powered by WordPress