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学习ASP.NET Core的身份认证（基于JwtBearer的身份认证10）

article 2025/1/30 13:30:32

基于Cookie传递token的主要思路是通过用户身份验证后，将生成的token保存到Response.Cookies返回客户端，后续客户端访问服务接口时会自动携带Cookie到服务端以便验证身份。之前一直搞不清楚的是服务端程序如何从Cookie读取token进行认证（一般都是将token放到header中以特定键值对形式自动验证身份），不过参考文献2中给出示例，主要是处理JwtBearerEvents.OnMessageReceived事件，该事件是接收到 protocol message时触发，此时可以从Cookie中取出token并将其赋予MessageReceivedContext.Token属性，以便支撑身份验证。主要代码如下所示：

[HttpPost]
public async Task<ApiResult> LoginPlus([FromBody] UserInfo info)
{
    try
    {
        if (_dbClient.Queryable<AppUser>().Any(r => (r.Account == info.Name) && (r.Password == info.Password)))
        {
            AppUser curUser = _dbClient.Queryable<AppUser>().First(r => (r.Account == info.Name) && (r.Password == info.Password));
           
            ApiResult result = new ApiResult();
            result.UserName = curUser.Name;

            var cookieOptions = new CookieOptions
            {
                HttpOnly = true, 
                Secure = true, 
                Expires = DateTime.UtcNow.AddDays(7) 
            };
            Response.Cookies.Append("auth_token", GetToken(info.Name), cookieOptions);

            return result;
        }
        else
        {
            return new ApiResult("身份验证失败", 500, false);
        }
    }
    catch (Exception ex)
    {
        return new ApiResult(ex.Message, 500, false);
    }
}

builder.Services.AddAuthentication(options =>
{
    ...
}).AddJwtBearer(options =>
{
    ...

    options.Events = new JwtBearerEvents
    {
        OnMessageReceived = context =>
        {
            var accessToken = context.Request.Cookies["auth_token"];

            if (!string.IsNullOrEmpty(accessToken))
            {
            	//Bearer Token. This will give the application an opportunity to 
            	//retrieve a token from an alternative location.
                context.Token = accessToken;
            }

            return Task.CompletedTask;
        }
    };
});