# WebSockets

When defining WebSockets, you normally declare a parameter of type `WebSocket` and with it you can read data from the client and send data to it.

Read more about it in the [FastAPI docs for WebSockets](https://fastapi.tiangolo.com/advanced/websockets/)

It is provided directly by Starlette, but you can import it from `fastapi`:

```python
from fastapi import WebSocket
```

/// tip

   *
   * @param file the file to read
   * @param processor the object to which the bytes of the file are passed.
   * @return the result of the byte processor
   * @throws IOException if an I/O error occurs
   * @deprecated Prefer {@code asByteSource(file).read(processor)}.
   */
  @Deprecated
  @InlineMe(
      replacement = "Files.asByteSource(file).read(processor)",
      imports = "com.google.common.io.Files")

func FuzzReader(f *testing.F) {
	testdata, err := os.ReadDir("testdata")
	if err != nil {
		f.Fatalf("failed to read testdata directory: %s", err)
	}
	for _, de := range testdata {
		if de.IsDir() {
			continue
		}
		b, err := os.ReadFile(filepath.Join("testdata", de.Name()))
		if err != nil {
			f.Fatalf("failed to read testdata: %s", err)
		}
		f.Add(b)
	}

	f.Fuzz(func(t *testing.T, b []byte) {

		}
	}
	return &Reader{
		src:      r,
		md5:      md5.New(),
		checksum: etag,
	}
}

// Read reads up to len(p) bytes from the underlying
// io.Reader as specified by the io.Reader interface.
func (r *Reader) Read(p []byte) (int, error) {
	n, err := r.src.Read(p)
	r.readN += int64(n)
	r.md5.Write(p[:n])

	if err == io.EOF && len(r.checksum) != 0 {

	if err != nil {
		t.Skipf("skipping test because opening a unixpacket socket failed: %v", err)
	}

	// Start a goroutine for the server to accept one connection
	// and read all the data sent on the connection,
	// reporting the number of bytes read on ch.
	ch := make(chan int, 1)
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		defer wg.Done()

		tot := 0
		defer func() {
			ch <- tot
		}()

@deprecated(
    "UJSONResponse is deprecated, FastAPI now serializes data directly to JSON "
    "bytes via Pydantic when a return type or response model is set, which is "
    "faster and doesn't need a custom response class. Read more in the FastAPI "
    "docs: https://fastapi.tiangolo.com/advanced/custom-response/#orjson-or-response-model "
    "and https://fastapi.tiangolo.com/tutorial/response-model/",
    category=FastAPIDeprecationWarning,

        response = new Trans2QueryFSInformationResponse(config, FileSystemInformation.SMB_INFO_ALLOCATION);

        byte[] buffer = new byte[10];
        int read = response.readSetupWireFormat(buffer, 0, 10);

        assertEquals(0, read);
    }

    @Test
    void testReadParametersWireFormat() {
        // Test readParametersWireFormat returns 0

  }

  @Override
  public int read() throws IOException {
    while (in != null) {
      int result = in.read();
      if (result != -1) {
        return result;
      }
      advance();
    }
    return -1;
  }

  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    checkNotNull(b);
    while (in != null) {
      int result = in.read(b, off, len);
      if (result != -1) {

             * HEAD state).
             *
             * In the case of a plain repository, we can read the HEAD file directly, resolved directly from the .git directory.
             *
             * In the case of a worktree, we read the gitdir from the plain text .git file. This resolves to a directory from which we read
             * the HEAD file and resolve commondir to the plain git repository.
             */

  public boolean closed() {
    return closed;
  }

  @Override
  public int read() throws IOException {
    throwIf(closed);
    throwIf(READ_THROWS);
    return in.read();
  }

  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    throwIf(closed);
    throwIf(READ_THROWS);
    return in.read(b, off, len);
  }

  @Override
  public long skip(long n) throws IOException {