我有一个使用OpenIdConnect通过Azure Active Directory进行身份验证的应用程序。一切正常,除非我从Office应用程序(excel / word)链接到我的网站。从这些应用程序中我得到一个“异常:相关失败。”。
根据我的研究,似乎办公室首先进行302重定向,然后打开该页面而不是原始链接。
见:https://github.com/aspnet/Security/issues/1252
建议如何处理此方案。我不想对身份验证流程进行很多更改并引入错误。
当我检测到excel的用户代理时,我尝试重定向到我网站上的其他页面。我认为然后会设置正确的cookie,我可以从那里重定向到请求的页面,然后触发授权。虽然没有运气
OnRedirectToIdentityProvider = context =>
{
if (context.Request.Headers["User-Agent"].ToString().Contains("Microsoft Office Excel"))
{
string redirect = context.Request.Scheme + "://" + context.Request.Host + context.Request.PathBase + "/Home/Office" + "?url=" + context.Request.Scheme + "://" + context.Request.Host + context.Request.PathBase + context.Request.Path;
context.Response.Clear();
context.Response.Redirect(redirect);
context.HandleResponse();
return Task.CompletedTask;
}
}
我能够使用owin中间件实现一个不错的解决方案。很大程度上借助这篇文章:https://github.com/aspnet/AspNetKatana/issues/78
我怎么需要将它转换为.net core 2.0。这是转换后的代码:
public class MsOfficeLinkPrefetchMiddleware
{
RequestDelegate _next;
public MsOfficeLinkPrefetchMiddleware(RequestDelegate next)
{
_next = next;
}
public Task Invoke(HttpContext context)
{
if (Is(context, HttpMethod.Get, HttpMethod.Head) && IsMsOffice(context))
{
// Mitigate by preempting auth challenges to MS Office apps' preflight requests and
// let the real browser start at the original URL and handle all redirects and cookies.
// Success response indicates to Office that the link is OK.
context.Response.StatusCode = (int)HttpStatusCode.OK;
context.Response.Headers["Cache-Control"] = "no-cache, no-store, must-revalidate";
context.Response.Headers["Pragma"] = "no-cache";
context.Response.Headers["Expires"] = "0";
}
else if (_next != null)
{
return _next.Invoke(context);
}
return Task.CompletedTask;
}
private static bool Is(HttpContext context, params HttpMethod[] methods)
{
var requestMethod = context.Request.Method;
return methods.Any(method => StringComparer.OrdinalIgnoreCase.Equals(requestMethod, method.Method));
}
private static readonly Regex _msOfficeUserAgent = new Regex(
@"(^Microsoft Office\b)|([\(;]\s*ms-office\s*[;\)])",
RegexOptions.CultureInvariant | RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled);
private static bool IsMsOffice(HttpContext context)
{
var headers = context.Request.Headers;
var userAgent = headers["User-Agent"];
return _msOfficeUserAgent.IsMatch(userAgent)
|| !string.IsNullOrWhiteSpace(headers["X-Office-Major-Version"]);
}
}
启动
app.UseMiddleware<MsOfficeLinkPrefetchMiddleware>();
希望这能够帮助将来的某个人。
在Startup.ConfigureServices()中,您需要添加此行
services.Configure<CookiePolicyOptions>(options =>
{
// This lambda determines whether user consent for
//non -essential cookies is needed for a given request.
options.CheckConsentNeeded = context => true;
options.MinimumSameSitePolicy = SameSiteMode.None;
});