App->>Client: Send Item 2
    App->>App: Produce Item 3
    Client->>Client: Process Item 2
    App->>Client: Send Item 3
    Client->>Client: Process Item 3
    Note over App: Keeps producing...
    Note over Client: Keeps consuming...
```

它甚至可以是一个无限流，你可以一直持续发送数据。

## JSON Lines { #json-lines }

在这些场景中，常见的做法是发送 “JSON Lines”，这是一种每行发送一个 JSON 对象的格式。

pkg testing/synctest, func Sleep(time.Duration) #77169...

          echo "Database initialized successfully";
          break;
        fi;
        echo "Waiting for database to be ready... ($$counter/12)";
        sleep 5;
        counter=$$(($$counter + 1));
      done;
      # timeout handling
      if [ $$counter -gt 20 ]; then
        echo "Error: Database failed to start within timeout";
        exit 1;
      fi;

    async def patched_read(self: StarletteUploadFile, size: int = -1) -> bytes:
        # Make the FIRST file slower *deterministically*
        if self.filename == "slow.txt":
            await anyio.sleep(0.05)
        return await original_read(self, size)

    monkeypatch.setattr(StarletteUploadFile, "read", patched_read)

    client = TestClient(app)

    files = [

   * response is ready.
   */
  @Test
  fun dispatchBlocksWaitingForEnqueue() {
    Thread {
      try {
        Thread.sleep(1000)
      } catch (ignored: InterruptedException) {
      }
      server.enqueue(MockResponse().setBody("enqueued in the background"))
    }.start()
    val connection = server.url("/").toUrl().openConnection()

    break
  else
    error_count=$((error_count + 1))
  fi
  if [[ ${error_count} -ge 60 ]] ; then
    echo "Fess is not available."
    cat ${temp_log_file} ./fess-*/logs/*.log
    exit 1
  fi
  sleep 1
done

pushd /tmp >/dev/null
git clone https://github.com/codelibs/fess-testdata.git
cd fess-testdata
git checkout f19176ab1b7ddc0a40393a8cbbb8d1c17b27c3ce
cd ..
popd >/dev/null

)
try:
    for _ in range(3):
        try:
            response = httpx.get("http://localhost:8000/docs")
        except httpx.ConnectError:
            time.sleep(1)
            break
    with sync_playwright() as playwright:
        run(playwright)
finally:

import java.util.concurrent.TimeUnit.SECONDS
import okhttp3.MediaType
import okhttp3.RequestBody
import okio.BufferedSink
import org.junit.jupiter.api.Assertions.assertTrue

/** A duplex request body that keeps the provided sinks so they can be written to later.  */
class AsyncRequestBody : RequestBody() {
  private val requestBodySinks: BlockingQueue<BufferedSink> = LinkedBlockingQueue()

  override fun contentType(): MediaType? = null

        }
    }

    override fun connectTcp(): ConnectResult {
      check(connectState == ConnectState.READY)
      events += "plan $id TCP connecting..."

      taskFaker.sleep(tcpConnectDelayNanos)

      if (yieldBeforeTcpConnectReturns) {
        taskFaker.yield()
      }

      return when {
        tcpConnectThrowable != null -> {

    }
  }

  private static void assertAtLeastTimePassed(Stopwatch stopwatch, long expectedMillis) {
    long elapsedMillis = stopwatch.elapsed(MILLISECONDS);
    /*
     * The "+ 5" below is to permit, say, sleep(10) to sleep only 9 milliseconds. We see such
     * behavior sometimes when running these tests publicly as part of Guava. "+ 5" is probably more
     * generous than it needs to be.
     */
    assertTrue(