def test_middleware():
    client = TestClient(app, base_url="http://example.com")
    response = client.get("/")
    assert response.status_code == 200, response.text
    client = TestClient(app, base_url="http://subdomain.example.com")
    response = client.get("/")
    assert response.status_code == 200, response.text
    client = TestClient(app, base_url="http://invalidhost")
    response = client.get("/")

Aşağıdaki argümanlar desteklenir:

* `allowed_hosts` - Hostname olarak izin verilmesi gereken domain adlarının listesi. `*.example.com` gibi wildcard domain'ler subdomain eşleştirmesi için desteklenir. Herhangi bir hostname'e izin vermek için `allowed_hosts=["*"]` kullanın veya middleware'i hiç eklemeyin.

    }

    // Test with different from addresses
    @Test
    public void test_differentFromAddresses() {
        String[] fromAddresses = { "******@****.***", "******@****.***", "******@****.***", "test.user@subdomain.example.com" };

        for (String from : fromAddresses) {
            ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
                private static final long serialVersionUID = 1L;

  * A pod can specify its own Hostname and Subdomain via annotations (<code>pod.beta.kubernetes.io/hostname, pod.beta.kubernetes.io/subdomain)</code>. If the Subdomain matches the name of a [headless service](http://kubernetes.io/docs/user-guide/services/#headless-services) in the same namespace, a DNS A record is also created for the pod’s FQDN. More

    }

    // Test with different origin formats
    @Test
    public void test_doFilter_differentOrigins() throws Exception {
        String[] origins = { "http://localhost:8080", "https://example.com", "http://subdomain.example.com", "https://example.com:3000" };

        for (String origin : origins) {
            resetMocks(); // Reset for each test
            mockRequest.setHeader("Origin", origin);

### kube-dns
* Adds support for configurable DNS stub domains and upstream nameservers.
  The following configuration options have been added to the `kube-system:kube-dns` ConfigMap:
  ```
  "stubDomains": {
    "acme.local": ["1.2.3.4"]
  },
  ```
  is a map of domain to list of nameservers for the domain. This is used
  to inject private DNS domains into the kube-dns namespace. In the above

   * Fix confusing logging when initialize server

   * Fix printf in cmd/kube-dns/app/server.go

   * Fix version on startup and `--version` flag

   * Support specifying port number for nameserver in stubDomains

#### kube-proxy
* Features:

  * ratelimit runs of iptables by sync-period flags ([#46266](https://github.com/kubernetes/kubernetes/pull/46266), [@thockin](https://github.com/thockin))

* Port-forward: use out and error streams instead of glog ([#17030](https://github.com/kubernetes/kubernetes/pull/17030), [@csrwng](https://github.com/csrwng))
* Promote Pod Hostname & Subdomain to fields (were annotations) ([#24362](https://github.com/kubernetes/kubernetes/pull/24362), [@ArtfulCoder](https://github.com/ArtfulCoder))

- Allowed setting the `hostnameOverride` field in `PodSpec` to specify any RFC 1123 DNS subdomain as the pod's hostname. The `HostnameOverride` feature gate was introduced to control enablement of this functionality. ([#132558](https://github.com/kubernetes/kubernetes/pull/132558), [@HirazawaUi](https://github.com/HirazawaUi)) [SIG API Machinery,...

- Dynamic Resource Allocator (DRA): Enhanced validation for the ResourceClaimParametersReference and ResourceClassParametersReference with the following rules:
  
  1. `apiGroup`: If set, it must be a valid DNS subdomain (e.g. 'example.com').