{* ../../docs_src/websockets/tutorial001.py hl[2,6:38,41:43] *}

## `websocket` を作成する

**FastAPI** アプリケーションで、`websocket` を作成します。

{* ../../docs_src/websockets/tutorial001.py hl[1,46:47] *}

/// note | 技術詳細

`from starlette.websockets import WebSocket` を使用しても構いません.

**FastAPI** は開発者の利便性のために、同じ `WebSocket` を提供します。しかし、こちらはStarletteから直接提供されるものです。

///

## メッセージの送受信

WebSocketルートでは、 `await` を使ってメッセージの送受信ができます。

	// Total number of completed operations
	ReplicatedCount int64 `json:"replicationCount"`
	// Total number of replica received
	ReplicaCount int64 `json:"replicaCount"`

	// in Queue stats for bucket - from qCache
	QStat InQueueMetric `json:"queued"`
	// Deprecated fields
	// Pending size in bytes
	PendingSize int64 `json:"pendingReplicationSize"`
	// Failed size in bytes
	FailedSize int64 `json:"failedReplicationSize"`

test-versioning: install-race
	@echo "Running minio versioning tests"
	@env bash $(PWD)/docs/bucket/versioning/versioning-tests.sh

test-configfile: install-race
	@env bash $(PWD)/docs/distributed/distributed-from-config-file.sh

test-upgrade: install-race
	@echo "Running minio upgrade tests"
	@(env bash $(PWD)/buildscripts/minio-upgrade.sh)

test-race: verifiers build ## builds minio, runs linters, tests (race)

}

// checkPostPolicy - apply policy conditions and validate input values.
// Note that content-length-range is checked in the API handler function PostPolicyBucketHandler.
// formValues is the already-canonicalized form values from the POST request.
func checkPostPolicy(formValues http.Header, postPolicyForm PostPolicyForm) error {
	// Check if policy document expiry date is still not reached
	if !postPolicyForm.Expiration.After(UTCNow()) {

（FastAPIを使用しない場合でも）Pythonの型の使用方法について簡単な復習が必要な場合は、短いチュートリアル（[Python Types](python-types.md){.internal-link target=_blank}）を参照してください。

型を使用した標準的なPythonを記述します:

```Python
from datetime import date

from pydantic import BaseModel

# Declare a variable as a str
# and get editor support inside the function
def main(user_id: str):
    return user_id


# A Pydantic model
class User(BaseModel):

        if (b != null) {
            def = b.toLowerCase().equals("true");
        }
        return def;
    }

    /**
     * Retrieve an array of <code>InetAddress</code> created from a property
     * value containing a <code>delim</code> separated list of host names and/or
     * ip addresses.
     *
     * @param props the properties to search in
     * @param key the property key to look up

                    stateChangeTime.set(System.currentTimeMillis());
                    halfOpenSuccesses.set(0);
                    log.info("Circuit breaker {} transitioning from OPEN to HALF_OPEN", name);
                    return State.HALF_OPEN;
                }
                // Another thread changed the state, re-evaluate
                return state.get();
            }
        }

        assertEquals(0, SMBUtil.readInt2(buffer, 2)); // maxItems
        assertEquals(0, SMBUtil.readInt4(buffer, 6)); // resumeKey
    }

    // Helper method to read string from buffer
    private String readString(byte[] buffer, int offset, int maxLength) {
        int length = 0;
        for (int i = offset; i < offset + maxLength && i < buffer.length; i++) {
            if (buffer[i] == 0) {

        byte[] buffer = new byte[24];

        // Test with offset 0
        int bytesDecoded = response.decode(buffer, 0, 24);
        assertEquals(24, bytesDecoded, "Should return 24 bytes consumed from offset 0");

        // Test with different offset
        response = new ValidateNegotiateInfoResponse();
        buffer = new byte[50];
        bytesDecoded = response.decode(buffer, 10, 24);

     * @return true if the element is contained in the list, false otherwise
     */
    public boolean contains(final E element) {
        return indexOf(element) != -1;
    }

    /**
     * Removes an element from the list.
     *
     * @param element the element
     * @return true if the element was removed, false otherwise
     */
    public boolean remove(final E element) {
        if (element == null) {