///

Bununla WebSocket'e bağlanabilir, ardından mesaj gönderip alabilirsiniz:

<img src="/img/tutorial/websockets/image05.png">

## Bağlantı Kopmalarını ve Birden Fazla Client'ı Yönetme { #handling-disconnections-and-multiple-clients }

Bir WebSocket bağlantısı kapandığında, `await websocket.receive_text()` bir `WebSocketDisconnect` exception'ı raise eder; ardından bunu bu örnekteki gibi yakalayıp (catch) yönetebilirsiniz.

        // Test null input handling
        try {
            KuromojiCSVUtil.quoteEscape(null);
            fail("Should throw NullPointerException for null input");
        } catch (NullPointerException e) {
            // Expected behavior
        }
    }

    @Test
    public void test_parse_null_input() {
        // Test null input handling
        try {

* "Item ID"，用於路徑。
* "Token"，作為查詢參數。

/// tip

注意查詢參數 `token` 會由一個依賴處理。

///

之後你就能連線到 WebSocket，並開始收發訊息：

<img src="/img/tutorial/websockets/image05.png">

## 處理斷線與多個用戶端 { #handling-disconnections-and-multiple-clients }

當 WebSocket 連線關閉時，`await websocket.receive_text()` 會拋出 `WebSocketDisconnect` 例外，你可以像範例中那樣捕捉並處理。

{* ../../docs_src/websockets_/tutorial003_py310.py hl[79:81] *}

試用方式：

│       ├── __init__.py  # makes "internal" a "Python subpackage"
│       └── admin.py     # "admin" submodule, e.g. import app.internal.admin
```

## `APIRouter` { #apirouter }

Let's say the file dedicated to handling just users is the submodule at `/app/routers/users.py`.

You want to have the *path operations* related to your users separated from the rest of the code, to keep it organized.

import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

/**
 * Servlet filter for handling character encoding conversion and URL redirection.
 * This filter processes requests with specific encoding requirements and converts
 * character encodings according to configured mapping rules.
 *

        assertEquals(this.getClass().getName(), topElement.getClassName());
    }

    @Test
    public void test_nestedExceptions() {
        // Test nested exception handling
        Exception level3 = new RuntimeException("Level 3 error");
        Exception level2 = new IllegalStateException("Level 2 error", level3);
        Exception level1 = new IOException("Level 1 error", level2);

        assertEquals(newState, entry.getLeaseState());
        assertEquals(initialEpoch + 1, entry.getEpoch());
        assertFalse(entry.isBreaking()); // Should be false after break handling completes
    }

    @Test
    @DisplayName("Should release lease")
    void testReleaseLease() {
        String path = "/share/file.txt";
        int requestedState = Smb2LeaseState.SMB2_LEASE_READ_HANDLE;

        // Act + Assert
        assertThrows(NullPointerException.class, () -> SmbCopyUtil.openCopyTargetFile(dest, SmbConstants.ATTR_NORMAL, false));
    }

    // --- Tests for copyFile exception handling branch ---

    @Nested
    class CopyFileExceptions {

        private SmbTreeHandleImpl newTreeHandle(boolean isSmb2) throws Exception {
            SmbTreeHandleImpl th = mock(SmbTreeHandleImpl.class);

        } catch (Exception e) {
            fail("Should have caught as FessSystemException");
        }
    }

    @Test
    public void test_longMessageHandling() {
        // Test handling of long messages
        StringBuilder longMessage = new StringBuilder();
        for (int i = 0; i < 1000; i++) {
            longMessage.append("Long message part ").append(i).append(" ");
        }

/**
 * Helper class for indexing operations in the Fess search engine.
 * This class provides functionality for sending documents to the search engine,
 * managing document lifecycle operations (create, update, delete), and handling
 * thumbnail processing during indexing.
 *
 * <p>The IndexingHelper manages bulk operations, handles retries on failures,
 * and provides various query-based operations for document management.