exceptionMessage = t.getClass().getSimpleName();
            }

            if (t instanceof UnknownHostException && !fullMessage.contains("host")) {
                fullMessage = join(fullMessage, "Unknown host " + exceptionMessage);
            } else if (!fullMessage.contains(exceptionMessage)) {
                fullMessage = join(fullMessage, exceptionMessage);
            }

    )
    val interceptor =
      Interceptor { chain: Interceptor.Chain ->
        // The network request has everything: User-Agent, Host, Accept-Encoding.
        val networkRequest = chain.request()
        assertThat(networkRequest.header("User-Agent")).isNotNull()
        assertThat(networkRequest.header("Host")).isEqualTo(
          server.hostName + ":" + server.port,
        )

 */
package okhttp3

import java.net.InetAddress
import java.net.UnknownHostException
import okhttp3.Dns.Companion.SYSTEM

/**
 * A domain name service that resolves IP addresses for host names. Most applications will use the
 * [system DNS service][SYSTEM], which is the default. Some applications may provide their own
 * implementation to use a different DNS server, to prefer IPv6 addresses, to prefer IPv4 addresses,

 *
 * <tr><td ><code>
 *  smb1://host/share/a/b/
 * </code></td><td ><code>
 *  c/d/
 * </code></td><td><code>
 *  smb1://host/share/a/b/c/d/
 * </code></td></tr>
 *
 * <tr><td ><code>
 *  smb1://host/share/foo/bar/
 * </code></td><td ><code>
 *  /share2/zig/zag
 * </code></td><td><code>
 *  smb1://host/share2/zig/zag
 * </code></td></tr>
 *
 * <tr><td ><code>

`http` または `ws` への受信リクエストは、安全なスキームにリダイレクトされます。

{* ../../docs_src/advanced_middleware/tutorial001_py310.py hl[2,6] *}

## `TrustedHostMiddleware` { #trustedhostmiddleware }

HTTP Host Header 攻撃を防ぐため、すべての受信リクエストに正しく設定された `Host` ヘッダーを強制します。

{* ../../docs_src/advanced_middleware/tutorial002_py310.py hl[2,6:8] *}

サポートされる引数は次のとおりです:

* [X-Forwarded-Proto](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Proto)
* [X-Forwarded-Host](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Host)

///

### 启用代理转发的请求头 { #enable-proxy-forwarded-headers }

你可以用 *CLI 选项* `--forwarded-allow-ips` 启动 FastAPI CLI，并传入应该被信任、允许读取这些转发请求头的 IP 地址列表。

      throw failures.first()
    }
  }

  private fun testToAscii(
    input: String,
    output: String?,
    comment: String?,
  ) {
    val url = "https://$input/".toHttpUrlOrNull()
    assertThat(url?.host, name = comment ?: input).isEqualTo(output)
  }

### Remotely Inspecting backend data

        }
        final int domainLength = domain.length;
        byte[] server = {};
        try {
            final String host = NbtAddress.getLocalHost().getHostName();
            if (host != null) {
                try {
                    server = host.getBytes(UNI_ENCODING);
                } catch (final IOException ex) {}
            }
        } catch (final UnknownHostException ex) {}

    @Size(max = 10000)
    public String term;

    /**
     * The related content to be displayed.
     */
    @Required
    @Size(max = 10000)
    public String content;

    /**
     * The virtual host for which this related content applies.
     */
    @Size(max = 1000)
    public String virtualHost;

    /**
     * The sort order for this related content (0-2147483647).
     */
    @Min(value = 0)