中间件中的HttpContext .NET核心保存实例 [英] HttpContext .NET core saving instance in Middleware

问题描述

在中间件中存储HttpContext实例是否安全?

Is it safe to store an instance of HttpContext in a middleware?

示例:

public class TestMiddleware
{        
    private readonly RequestDelegate next;    
    private HttpContext context;
    public TestMiddleware(RequestDelegate next)
    {
        this.next = next;
    }

    public async Task Invoke(HttpContext context)        
    {
        try
        {
            this.context = context;

我想在其他私有方法中使用它来处理它，因此我既可以将它作为参数传递给那些函数，也可以如示例中所示使用它.

I would like to use it in other private methods to work on it, so I can either pass it around as parameter to those function or use it as shown in the example.

但是线程安全吗?

推荐答案

但是线程安全吗?

But is it thread safe?

不，不是，因为中间件一定是单例.如果您将特定的HttpContext存储在共享字段中，则它可能会在另一个请求期间被重用(这很糟糕).

No it's not, because middleware are necessarily singletons. If you store a specific HttpContext in a shared field, it will be potentially reused during another request (which would be terrible).

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