You may query the cluster probe endpoint to check if the node which received the request can be taken down for maintenance, if the server replies back '412 Precondition Failed' this means you will lose HA. '200 OK' means you are okay to proceed.

```
curl http://minio1:9001/minio/health/cluster?maintenance=true
HTTP/1.1 412 Precondition Failed
Accept-Ranges: bytes
Content-Length: 0
Server: MinIO
Vary: Origin
X-Amz-Bucket-Region: us-east-1

        transaction.setDataBytesWritten(300);

        // First element
        transaction.nextElement();
        assertTrue(transaction.hasMoreElements(), "Should have more elements for large data");

        // Process multiple elements
        int count = 1;
        while (transaction.hasMoreElements() && count < 10) {
            transaction.nextElement();
            count++;
        }

**FastAPI** 为了开发者方便提供了该对象，但它直接来自 Starlette。

///

### 在 `response` 之前与之后 { #before-and-after-the-response }

你可以在任何*路径操作*接收 `request` 之前，添加要与该 `request` 一起运行的代码。

也可以在生成 `response` 之后、返回之前添加代码。

例如，你可以添加一个自定义请求头 `X-Process-Time`，其值为处理请求并生成响应所花费的秒数：

{* ../../docs_src/middleware/tutorial001_py310.py hl[10,12:13] *}

/// tip

     * we must exclude each transitive dependency of each direct dependency.
     * <p>
     * Determining the transitive deps of a dependency which has been resolved as
     * non-transitive is difficult because the process of resolving removes the
     * transitive deps. To sidestep this issue, we create a configuration per
     * direct dependency version. This specially named and unique configuration

import org.gradle.api.model.ObjectFactory;
import org.gradle.api.tasks.Internal;
import org.gradle.api.tasks.SkipWhenEmpty;
import org.gradle.api.tasks.TaskAction;
import org.gradle.api.tasks.options.Option;
import org.gradle.process.ExecOperations;

import java.io.File;
import java.nio.file.Path;
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.inject.Inject;

INFO:     Will watch for changes in these directories: ['/home/user/code/awesomeapp']
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [2248755] using WatchFiles
INFO:     Started server process [2248757]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">

    override fun intercept(chain: Interceptor.Chain): Response {
      val level = this.level

      val request = chain.request()
      if (level == Level.NONE) {
        return chain.proceed(request)
      }

      val logBody = level == Level.BODY
      val logHeaders = logBody || level == Level.HEADERS

      val requestBody = request.body

      val connection = chain.connection()

    }

    /**
     * Processes sub-roles for the specified LDAP user.
     *
     * @param ldapUser the LDAP user to process sub-roles for
     * @param bindDn the bind DN for LDAP connection
     * @param subRoleSet the set of sub-roles to process
     * @param groupFilter the group filter pattern
     * @param roleSet the set of roles to update
     */

             to quit<b>)</b>
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started reloader process <b>[</b><font color="#34E2E2"><b>383138</b></font><b>]</b> using WatchFiles
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started server process <b>[</b><font color="#34E2E2"><b>383153</b></font><b>]</b>

			truncate(path, length, callback) { callback(enosys()); },
			unlink(path, callback) { callback(enosys()); },
			utimes(path, atime, mtime, callback) { callback(enosys()); },
		};
	}

	if (!globalThis.process) {
		globalThis.process = {
			getuid() { return -1; },
			getgid() { return -1; },
			geteuid() { return -1; },
			getegid() { return -1; },
			getgroups() { throw enosys(); },
			pid: -1,
			ppid: -1,