### CORS 预检请求 { #cors-preflight-requests }

这是些带有 `Origin` 和 `Access-Control-Request-Method` 请求头的 `OPTIONS` 请求。

在这种情况下，中间件将拦截传入的请求并进行响应，出于提供信息的目的返回一个使用了适当的 CORS headers 的 `200` 或 `400` 响应。

### 简单请求 { #simple-requests }

任何带有 `Origin` 请求头的请求。在这种情况下，中间件将像平常一样传递请求，但是在响应中包含适当的 CORS headers。

## 更多信息 { #more-info }

                <template>src/main/mdo/merger.vm</template>
                <template>src/main/mdo/transformer.vm</template>
                <template>src/main/mdo/reader.vm</template>
                <template>src/main/mdo/reader-ex.vm</template>
                <template>src/main/mdo/writer.vm</template>
                <template>src/main/mdo/writer-ex.vm</template>
              </templates>
              <params>

 */

package jcifs.netbios;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.HashMap;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.CIFSContext;
import jcifs.smb.SmbFileInputStream;

/**

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Hashtable;

import jcifs.smb1.Config;
import jcifs.smb1.smb1.SmbFileInputStream;
import jcifs.smb1.util.LogStream;

/**
 * Lmhosts file handling for NetBIOS name resolution.
 */

* completion (meaning code auto-completion): автозавершение
* editor (meaning component of IDE): редактор кода
* adopt (meaning start to use): использовать (or `начать использовать`)
* headers (meaning HTTP-headers): HTTP-заголовки
* cookie sessions: сессии с использованием cookie
* tested (adjective): протестированный
* middleware: middleware (don't translate, but add `промежуточный слой` if clarification is needed)

		resource := "test"
		runtime.GOMAXPROCS(gomaxprocs)
		// Number of active readers + 10000 * number of active writers.
		var activity int32
		cdone := make(chan bool)
		go writer(resource, numIterations, &activity, cdone)
		var i int
		for i = 0; i < numReaders/2; i++ {
			go reader(resource, numIterations, &activity, cdone)
		}
		go writer(resource, numIterations, &activity, cdone)

        prop.load(inStream);
        properties = prop;
    }

    @Override
    public synchronized void load(final Reader reader) throws IOException {
        final Properties prop = new Properties();
        lastModified = propertiesFile.lastModified();
        prop.load(reader);
        properties = prop;
    }

    @Override

///

## Agrega headers personalizados { #add-custom-headers }

Existen algunas situaciones en las que es útil poder agregar headers personalizados al error HTTP. Por ejemplo, para algunos tipos de seguridad.

Probablemente no necesitarás usarlos directamente en tu código.

Pero en caso de que los necesites para un escenario avanzado, puedes agregar headers personalizados:

  // Optional: confirm that your app made the HTTP requests you were expecting.
  val request1 = server.takeRequest()
  assertEquals("/v1/chat/messages/", request1.url.encodedPath)
  assertNotNull(request1.headers["Authorization"])

  val request2 = server.takeRequest()
  assertEquals("/v1/chat/messages/2", request2.url.encodedPath)

  val request3 = server.takeRequest()

@app.middleware("http")
async def add_process_time_header(request: Request, call_next):
    start_time = time.perf_counter()
    response = await call_next(request)
    process_time = time.perf_counter() - start_time
    response.headers["X-Process-Time"] = str(process_time)