}

    @Override
    public String getSinkContents() throws IOException {
      Path file = getPath();
      try (Reader reader = java.nio.file.Files.newBufferedReader(file, UTF_8)) {
        StringBuilder builder = new StringBuilder();
        for (int c = reader.read(); c != -1; c = reader.read()) {
          builder.append((char) c);
        }
        return builder.toString();
      }
    }
  }

 *    * connection held ([connectionAcquired], [connectionReleased])
 *      * request ([requestFailed])
 *        * headers ([requestHeadersStart], [requestHeadersEnd])
 *        * body ([requestBodyStart], [requestBodyEnd])
 *      * response ([responseFailed])
 *        * headers ([responseHeadersStart], [responseHeadersEnd])
 *        * body ([responseBodyStart], [responseBodyEnd])
 *

In this case the middleware will intercept the incoming request and respond with appropriate CORS headers, and either a `200` or `400` response for informational purposes.

### Simple requests { #simple-requests }

Any request with an `Origin` header. In this case the middleware will pass the request through as normal, but will include appropriate CORS headers on the response.

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.squareup.okhttp3.maventest;

import java.io.IOException;

import okhttp3.Headers;
import okhttp3.HttpUrl;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class SampleHttpClient {
  private final OkHttpClient client;

  public SampleHttpClient() {

        assertNotNull("Allow-Methods header should be set", responseHeaders.get("Access-Control-Allow-Methods"));
        assertNotNull("Allow-Headers header should be set", responseHeaders.get("Access-Control-Allow-Headers"));
        assertNotNull("Max-Age header should be set", responseHeaders.get("Access-Control-Max-Age"));

 * limitations under the License.
 */

package com.google.common.io;

import static java.nio.charset.StandardCharsets.UTF_8;

import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import org.jspecify.annotations.NullUnmarked;

/**
 * A char source for testing that has configurable options.
 *
 * @author Colin Decker
 */
@NullUnmarked

        .header("User-Agent", "OkHttp Headers.java")
        .addHeader("Accept", "application/json; q=0.5")
        .addHeader("Accept", "application/vnd.github.v3+json")
        .build()

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

      println("Server: ${response.header("Server")}")

}

// Return canonical headers.
func canonicalizedAmzHeadersV2(headers http.Header) string {
	var keys []string
	keyval := make(map[string]string, len(headers))
	for key := range headers {
		lkey := strings.ToLower(key)
		if !strings.HasPrefix(lkey, "x-amz-") {
			continue
		}
		keys = append(keys, lkey)
		keyval[lkey] = strings.Join(headers[key], ",")
	}
	sort.Strings(keys)

        // Headers persist in same request, so subsequent headers are additive
        // Test with case insensitive matching
        request.addHeader("X-Forwarded-Host", "TEST.COM");
        result = virtualHostHelper.processVirtualHost(s -> "processed_" + s, "default");
        assertEquals("processed_site1", result); // Still site1 due to header precedence

        // Test with custom header

    server.enqueue(
      MockResponse(
        headers =
          headersOf(
            "Last-Modified",
            formatDate(-1, TimeUnit.HOURS)!!,
            "Expires",
            formatDate(1, TimeUnit.HOURS)!!,
          ),
        body = "ABC.1",
      ),
    )
    server.enqueue(
      MockResponse(
        headers =
          headersOf(
            "Last-Modified",