fun Response.commonClose() {
  body.close()
}

fun Response.commonToString(): String = "Response{protocol=$protocol, code=$code, message=$message, url=${request.url}}"

fun Response.Builder.commonRequest(request: Request) =
  apply {
    this.request = request
  }

fun Response.Builder.commonProtocol(protocol: Protocol) =
  apply {
    this.protocol = protocol
  }

import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.RepositoryRequest;

/**
 * Forms a request to retrieve artifact metadata.
 *
 */
@Deprecated
public interface MetadataResolutionRequest extends RepositoryRequest {

    /**
     * Indicates whether network access to remote repositories has been disabled.

    protected static final String OPTIONS = "OPTIONS";

    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {
        final HttpServletRequest httpRequest = (HttpServletRequest) request;
        final String origin = httpRequest.getHeader("Origin");
        if (StringUtil.isNotBlank(origin)) {

			// these quotes.
			addr = strings.Trim(match[1], `"`)
		}
	}

	return addr
}

// GetSourceIPRaw retrieves the IP from the request headers
// and falls back to r.RemoteAddr when necessary.
// however returns without bracketing.
func GetSourceIPRaw(r *http.Request) string {
	addr := GetSourceIPFromHeaders(r)
	if addr == "" {
		addr = r.RemoteAddr
	}

	// Default to remote address if headers not set.

import okhttp3.FormBody
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.OkHttpClient
import okhttp3.Request

class PostForm {
  private val client = OkHttpClient()

  fun run() {
    val formBody =
      FormBody.Builder()
        .add("search", "Jurassic Park")
        .build()
    val request =
      Request(
        url = "https://en.wikipedia.org/w/index.php".toHttpUrl(),
        body = formBody,
      )

package okhttp3.recipes.kt

import java.io.IOException
import okhttp3.OkHttpClient
import okhttp3.Request

class SynchronousGet {
  private val client = OkHttpClient()

  fun run() {
    val request =
      Request.Builder()
        .url("https://publicobject.com/helloworld.txt")
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")

        }
    }
    void send( ServerMessageBlock request, ServerMessageBlock response ) throws SmbException {

        connect(); /* must negotiate before we can test flags2, useUnicode, etc */

        request.flags2 |= flags2;
        request.useUnicode = useUnicode;
        request.response = response; /* needed by sign */
        if (request.digest == null)
            request.digest = digest; /* for sign called in encode */

     * for the specified servlet request.
     * 
     * @param tc
     *
     * @param req
     *            The request being serviced.
     * @param resp
     *            The response.
     * @param challenge
     *            The domain controller challenge.
     * @return credentials passed in the servlet request
     * @throws IOException
     *             If an IO error occurs.

import jcifs.internal.CommonServerMessageBlockResponse;
import jcifs.internal.Request;


/**
 * @author mbechler
 * @param <T>
 *            request type
 *
 */
public abstract class ServerMessageBlock2Request <T extends ServerMessageBlock2Response> extends ServerMessageBlock2
        implements CommonServerMessageBlockRequest, Request<T> {

    private T response;
    private Integer overrideTimeout;

如果你使用了 `yield` 关键字依赖, 依赖中的退出代码将在执行中间件*后*执行.

如果有任何后台任务(稍后记录), 它们将在执行中间件*后*运行.

///

## 创建中间件

要创建中间件你可以在函数的顶部使用装饰器 `@app.middleware("http")`.

中间件参数接收如下参数:

* `request`.
* 一个函数 `call_next` 它将接收 `request` 作为参数.
    * 这个函数将 `request` 传递给相应的 *路径操作*.
    * 然后它将返回由相应的*路径操作*生成的 `response`.
* 然后你可以在返回 `response` 前进一步修改它.

```Python hl_lines="8-9  11  14"
{!../../docs_src/middleware/tutorial001.py!}
```

/// tip