* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.ws

import java.io.Closeable
import java.io.IOException
import java.util.zip.Inflater
import okio.Buffer
import okio.InflaterSource

private const val OCTETS_TO_ADD_BEFORE_INFLATION = 0x0000ffff

    clientListener.assertClosed(1000, "")
    serverListener.assertClosed(1000, "")
  }

  @Test
  fun wsScheme() {
    assumeNotWindows()
    websocketScheme("ws")
  }

  @Test
  fun wsUppercaseScheme() {
    websocketScheme("WS")
  }

  @Test
  fun wssScheme() {
    webServer.useHttps(handshakeCertificates.sslSocketFactory())
    client =
      client.newBuilder()

    lazyCacheControl = result
  }
  return result
}

internal fun canonicalUrl(url: String): String {
  // Silently replace web socket URLs with HTTP URLs.
  return when {
    url.startsWith("ws:", ignoreCase = true) -> {
      "http:${url.substring(3)}"
    }
    url.startsWith("wss:", ignoreCase = true) -> {
      "https:${url.substring(4)}"
    }
    else -> url
  }
}

**FastAPI** 🚚 📚 🛠️ `fastapi.middleware` 🏪 👆, 👩‍💻. ✋️ 🌅 💪 🛠️ 👟 🔗 ⚪️➡️ 💃.

///

## `HTTPSRedirectMiddleware`

🛠️ 👈 🌐 📨 📨 🔜 👯‍♂️ `https` ⚖️ `wss`.

🙆 📨 📨 `http` ⚖️ `ws` 🔜 ❎ 🔐 ⚖ ↩️.

```Python hl_lines="2  6"
{!../../docs_src/advanced_middleware/tutorial001.py!}
```

## `TrustedHostMiddleware`

🛠️ 👈 🌐 📨 📨 ✔️ ☑ ⚒ `Host` 🎚, ✔ 💂‍♂ 🛡 🇺🇸🔍 🦠 🎚 👊.

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.ws

import assertk.assertThat
import assertk.assertions.isEqualTo
import okhttp3.Headers.Companion.headersOf
import org.junit.jupiter.api.Test

class WebSocketExtensionsTest {
  @Test
  fun emptyHeader() {

///

## `HTTPSRedirectMiddleware`

Enforces that all incoming requests must either be `https` or `wss`.

Any incoming request to `http` or `ws` will be redirected to the secure scheme instead.

{* ../../docs_src/advanced_middleware/tutorial001.py hl[2,6] *}

## `TrustedHostMiddleware`

///

## `HTTPSRedirectMiddleware`

Erzwingt, dass alle eingehenden Requests entweder `https` oder `wss` sein müssen.

Alle eingehenden Requests an `http` oder `ws` werden stattdessen an das sichere Schema umgeleitet.

```Python hl_lines="2  6"
{!../../docs_src/advanced_middleware/tutorial001.py!}
```

## `TrustedHostMiddleware`

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.ws

import java.io.IOException
import okhttp3.Headers
import okhttp3.internal.delimiterOffset
import okhttp3.internal.trimSubstring
import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

/**

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.ws

import okio.Buffer
import okio.ByteString.Companion.encodeUtf8

object WebSocketProtocol {
  /** Magic value which must be appended to the key in a response header. */

	case finished:
		return n, io.EOF
	default:
		return n, nil
	}
}

func (sr *sparseFileReader) WriteTo(w io.Writer) (n int64, err error) {
	ws, ok := w.(io.WriteSeeker)
	if ok {
		if _, err := ws.Seek(0, io.SeekCurrent); err != nil {
			ok = false // Not all io.Seeker can really seek
		}
	}
	if !ok {
		return io.Copy(w, struct{ io.Reader }{sr})
	}