Question

根据我的应用程序性质，我必须从数据库中获得用户的角色。我正在context.AcquireRequestState += context_AcquireRequestState;的{{1}}事件处理程序中对用户进行身份验证。我可以从HttpModule进行数据库调用来分配Identity中的角色吗？这是好习惯吗？如果没有，我必须在调用控制器的操作方法之前在哪里做？？

Answer 1

我不知道您如何处理Aquaire请求状态，理想情况下，您必须执行以下操作：

[Authorize(Roles="Admin")]
[Route("user/{id:guid}/roles")]
[HttpPut]
public async Task<IHttpActionResult> AssignRolesToUser([FromUri] string id, [FromBody] string[] rolesToAssign)
{

    var appUser = await this.AppUserManager.FindByIdAsync(id);

    if (appUser == null)
    {
        return NotFound();
    }

    var currentRoles = await this.AppUserManager.GetRolesAsync(appUser.Id);

    var rolesNotExists = rolesToAssign.Except(this.AppRoleManager.Roles.Select(x => x.Name)).ToArray();

    if (rolesNotExists.Count() > 0) {

        ModelState.AddModelError("", string.Format("Roles '{0}' does not exixts in the system", string.Join(",", rolesNotExists)));
        return BadRequest(ModelState);
    }

    IdentityResult removeResult = await this.AppUserManager.RemoveFromRolesAsync(appUser.Id, currentRoles.ToArray());

    if (!removeResult.Succeeded)
    {
        ModelState.AddModelError("", "Failed to remove user roles");
        return BadRequest(ModelState);
    }

    IdentityResult addResult = await this.AppUserManager.AddToRolesAsync(appUser.Id, rolesToAssign);

    if (!addResult.Succeeded)
    {
        ModelState.AddModelError("", "Failed to add user roles");
        return BadRequest(ModelState);
    }

    return Ok();
}

来源为here

从HttpModule中的数据库获取角色

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