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.net core 3.1 Identity Server4 (实现GitHub登录)

7218人阅读 2021/1/19 15:32 总访问：3734924 评论：1 收藏：0 手机

分类: Ids4

![.netcore](https://img.tnblog.net/arcimg/hb/c857299a86d84ee7b26d181a31e58234.jpg ".netcore")
>#.net core 3.1 Identity Server4 (实现GitHub登录)
[TOC]

创建GitHub应用
------------

![](https://img.tnblog.net/arcimg/hb/1679181068594ff0b40112b3618ee672.png)

![](https://img.tnblog.net/arcimg/hb/dda257fd8bee4ed7b515d3d1f185bcc4.png)

![](https://img.tnblog.net/arcimg/hb/0fd2a20a42d849e58703053fb1f82e97.png)

![](https://img.tnblog.net/arcimg/hb/97423e1dc82942d59fe2c2e033071bb5.png)

tn>在下面进行身份授权的时候，我去掉了`Webhook`添加了邮箱的读取。

![](https://img.tnblog.net/arcimg/hb/0c8f2b40038c4831ad31e1141b1fbea3.png)


![](https://img.tnblog.net/arcimg/hb/a235e4ae492b4788b94f627f644d072a.png)

添加相关代码
------------

>### 添加相关依赖库

```bash
Install-Package AspNet.Security.OAuth.GitHub -Version 3.1.6
```

tn>在`Startup`中，添加Github相关扩展

```csharp
services.AddAuthentication()
    .AddGitHub(options =>
    {
        options.ClientId = "your_ClientId";
        options.ClientSecret = "your_ClientSecret";
		// 添加 email
        options.Scope.Add("user:email");
    });

```

>### 扩展登录相关代码

tn>在`LoginViewModel`实体中，添加扩展登录`ExternalProviders`属性。

```csharp
/// <summary>
/// 获取第三方登录扩展
/// </summary>
public IEnumerable<AuthenticationScheme> ExternalProviders { get; set; }
```

tn>添加第三方登录注册类`ExternalRegisterViewModel`

```csharp
public class ExternalRegisterViewModel
{
    public string Username { get; set; }
    public string ReturnUrl { get; set; }
}
```

tn>在`IdentityCodeAuthController`控制器中修改登录内容

```csharp
[HttpGet]
public async Task<IActionResult> Login(string returnUrl)
{
    var vm = new LoginViewModel() { ReturnUrl = returnUrl };
    // 获取上下文的内容
    var context = await _interaction.GetAuthorizationContextAsync(returnUrl);
    vm.Username = context?.LoginHint;

    // 获取第三方登录扩展
    var externalProviders = await _signInManager.GetExternalAuthenticationSchemesAsync();
    vm.ExternalProviders = externalProviders;
    return View(vm);
}
```

tn>在前台添加显示扩展显示标签。

```html

<form asp-controller="IdentityCodeAuth" asp-action="ExternalLogin" asp-route-returnUrl="@Model.ReturnUrl" method="post">
    @foreach (var provider in Model.ExternalProviders)
    {
    <button name="provider" type="submit" value="@provider.Name">@provider.Name</button>
    }
</form>
```

tn>在添加第三方验证

```csharp
/// <summary>
/// 第三方登录扩展处理
/// </summary>
/// <param name="returnUrl"></param>
/// <returns></returns>
public async Task<IActionResult> ExternalLogin(string provider, string returnUrl) 
{
    // 制作回调地址
    var redirectUri = Url.Action(nameof(ExteranlLoginCallback), "IdentityCodeAuth", new { returnUrl });
    var properties = _signInManager.ConfigureExternalAuthenticationProperties(provider,redirectUri);
    return Challenge(properties, provider);
}
/// <summary>
/// 重定向到外部登录问题
/// </summary>
/// <returns></returns>
public async Task<IActionResult> ExteranlLoginCallback(string returnUrl) 
{
    // 获取外部信息
    var info = await _signInManager.GetExternalLoginInfoAsync();
    // 当我们获取不到就将它跳转回login页重新登录
    if (info == null)
    {
        return RedirectToAction("Login");
    }

    // 获取相关信息
    var result = await _signInManager.ExternalLoginSignInAsync(info.LoginProvider, info.ProviderKey, false);

    if (result.Succeeded)
    {
        return Redirect(returnUrl);
    }

    // 找不到就注册
    var username = info.Principal.FindFirst(ClaimTypes.Name.Replace(" ", "_")).Value;

    return View("ExternalRegister",new ExternalRegisterViewModel {
        Username = username,
        ReturnUrl = returnUrl
    });
}
/// <summary>
/// 获取第三方注册处理
/// </summary>
/// <returns></returns>
public async Task<IActionResult> ExternalRegister(ExternalRegisterViewModel vm)
{
    // 获取外部信息
    var info = await _signInManager.GetExternalLoginInfoAsync();
    // 当我们获取不到就将它跳转回login页重新登录
    if (info == null)
    {
        return RedirectToAction("Login");
    }

    // 创建用户 (这里就没要密码)
    var user = new IdentityUser(vm.Username);
	// 获取邮箱
	user.Email = info.Principal.Claims.FirstOrDefault(x => x.Type.Contains("email"))?.Value;
    var result = await _userManager.CreateAsync(user);

    if (!result.Succeeded)
    {
        return View(vm);
    }
    // 向指定用户添加外部用户登录信息
    result = await _userManager.AddLoginAsync(user, info);

    if (!result.Succeeded)
    {
        return View(vm);
    }
    // 用户登录
    await _signInManager.SignInAsync(user,false);

    return Redirect(vm.ReturnUrl);
}
```

tn>添加注册页面`ExternalRegister`

```csharp
@model ExternalRegisterViewModel

<form asp-controller="IdentityCodeAuth" asp-action="ExternalRegister" method="post">
    <input type="hidden" asp-for="ReturnUrl" />
    <div>
        <label>Username</label>
        <input asp-for="Username" />
        <span asp-validation-for="Username"></span>
    </div>
    <div>
        <button type="submit">Register In</button>
    </div>
</form>
```

运行测试
------------

![](https://img.tnblog.net/arcimg/hb/7d02c4d3b1ed47a59a07800bd560b461.png)

![](https://img.tnblog.net/arcimg/hb/f2b4cef5e0304a21940cdde8c94f8429.png)

![](https://img.tnblog.net/arcimg/hb/2aa91b6250534364a5e5b3b4ea0b23f2.png)

![](https://img.tnblog.net/arcimg/hb/417f0a97f0ba475ba854b045d521e2ff.png)


tn>我们发现邮箱仍然没有出来，接着我们只需要添加邮箱相关资源即可。

![](https://img.tnblog.net/arcimg/hb/f08c2e459b1d4f40807eb282f350fbf7.png)
![](https://img.tnblog.net/arcimg/hb/3b056382ce1e4f2ba1dbf3434110c604.png)
![](https://img.tnblog.net/arcimg/hb/bc5554c5e10f41fc98810cd30d0204e6.png)

tn>然后再运行一次

![](https://img.tnblog.net/arcimg/hb/722fb24c92ea4288b619d4d9dc8d21db.png)

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.net core 3.1 Identity Server4 (实现GitHub登录)

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