可以通过使用自定义中间件处理从查询字符串中获取身份验证令牌来解决此问题。
public class SignalRQueryStringAuthMiddleware
{
private readonly RequestDelegate _next;
public SignalRQueryStringAuthMiddleware(RequestDelegate next)
{
_next = next;
}
// Convert incomming qs auth token to a Authorization header so the rest of the chain
// can authorize the request correctly
public async Task Invoke(HttpContext context)
{
if (context.Request.Headers["Connection"] == "Upgrade" &&
context.Request.Query.TryGetValue("authToken", out var token))
{
context.Request.Headers.Add("Authorization", "Bearer " + token.First());
}
await _next.Invoke(context);
}
}
public static class SignalRQueryStringAuthExtensions
{
public static IApplicationBuilder UseSignalRQueryStringAuth(this IApplicationBuilder builder)
{
return builder.UseMiddleware<SignalRQueryStringAuthMiddleware>();
}
}
这将尝试获取查询字符串值“authtoken”,并设置头,以便您可以利用身份验证中间件。您需要在管道中的身份验证中间件之前调用它,如下所示:
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
//...
app.UseSignalRQueryStringAuth();
app.UseAuthentication();
//...
}
编辑
另一方面,只有当用户登录时,才应附加令牌:
if (accessToken) {
hubUrl += '?authToken' +'=' + accessToken;
}
this._hubConnection = new HubConnectionBuilder()
.withUrl(hubUrl)
.build();