The trick is to input the right redirect url at the point of creating the ID. I found that updating the redirect url once the ID has been created via an 'Edit' just doesn't get the job done. What also worked for me is duplicating the entire 'vendor' folder and copying it to the same location where the 'oauth' file is (just until you successfully generate the token and then you can delete the duplicate 'vendor' folder). This is because trying to point to the vendor folder via '../vendor/autoload' didn't work for me.

因此，删除您现有的麻烦客户端OAuth ID，并尝试这种方法，它将工作。

重定向url区分大小写。

在我的例子中，我添加了两个: http://localhost:5023/AuthCallback/IndexAsync http://localhost:5023/authcallback/indexasync

我在控制台中有两个请求uri, http://xxxxx/client/api/spreadsheet/authredirect和http://localhost。

我尝试了这个问题的所有回答，并确认没有一个是我的问题。

我从控制台删除了localhost，更新了client_secret。Json在我的项目中，不匹配错误消失了。

小心url末尾多余的/ http://localhost:8000和http://localhost:8000/不同

如果你使用这个教程:https://developers.google.com/identity/sign-in/web/server-side-flow，那么你应该使用“postmessage”。

在GO中，这解决了问题:

confg = &oauth2.Config{
        RedirectURL:  "postmessage",
        ClientID:   ...,
        ClientSecret: ...,
        Scopes:      ...,
        Endpoint:     google.Endpoint,
}

Rails用户(来自omniauth-google-oauth2文档):

修复redirect_uri在Rails中的协议不匹配 只需要根据Rails.env在OmniAuth中设置full_host。 #配置/初始化/ omniauth.rb OmniAuth.config。full_host = Rails.env.production?？ 'https://domain.com': 'http://localhost:3000'

记住:不要包括后面的"/"