### 扩展后的 **FastAPI** app 文件

让我们继续之前的文件结构：

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

假设现在包含**FastAPI** app的文件 `main.py`  有些其他**路径操作**。

有个 `GET` 操作会返回错误。

有个 `POST` 操作会返回一些错误。

所有*路径操作* 都需要一个`X-Token` 头。

//// tab | Python 3.10+

```Python
{!> ../../docs_src/app_testing/app_b_an_py310/main.py!}
```

////

	// Calculate the size of the bitrot file and compare
	// it with the actual file size.
	if left != bitrotShardFileSize(partSize, shardSize, algo) {
		return errFileCorrupt
	}

	bufp := xioutil.ODirectPoolSmall.Get().(*[]byte)
	defer xioutil.ODirectPoolSmall.Put(bufp)

	for left > 0 {
		// Read expected hash...
		h.Reset()
		n, err := io.ReadFull(r, hashBuf)
		if err != nil {

# See the License for the specific language governing permissions and
# limitations under the License.

set -e

# https://stackoverflow.com/questions/59895/how-can-i-get-the-source-directory-of-a-bash-script-from-within-the-script-itsel
# Note: the normal way we use in other scripts in Istio do not work when `source`d, which is why we use this approach

  shift
  goto argsloop
)

:run

if "!args!"=="" (
  if defined DOUBLECLICKED (
    set CMDS="ui"
  ) else set CMDS=!args!
) else set CMDS=!args!

rem We add a / in front, so we get file:///C: instead of file://C:
rem Java considers the later a UNC path.
rem We also attempt a solid effort at making it URI friendly.
rem We don't even bother with UNC paths.
set JAVA_FRIENDLY_HOME_1=/!ACTIVATOR_HOME:\=/!

/** Data classes that correspond to each of the methods of [EventListener]. */
@SuppressSignatureCheck
sealed class CallEvent {
  abstract val timestampNs: Long
  abstract val call: Call

  val name: String
    get() = javaClass.simpleName

  /** Returns if the event closes this event, or null if this is no open event. */
  open fun closes(event: CallEvent): Boolean? = null

  data class ProxySelectStart(

    }


    /**
     * {@inheritDoc}
     *
     * @see java.lang.Object#finalize()
     */
    @Override
    protected void finalize () throws Throwable {
        if ( this.usageCount.get() != 0 ) {
            log.warn("Tree handle was not properly released " + this.resourceLoc.getURL());
        }
    }


    /**
     * {@inheritDoc}
     *

	if _, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Read bucket access policy.
	config, err := globalPolicySys.Get(bucket)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	configData, err := json.Marshal(config)
	if err != nil {

     * be set on builder to make it able to create session instances.
     */
    @Override
    public SessionBuilder get() {
        requireNonNull(repositorySystem, "repositorySystem");
        SessionBuilder builder = repositorySystem.createSessionBuilder();
        configureSessionBuilder(builder);
        return builder;
    }

                if (key == null)
                    throw new IOException( "end of stream" );
                synchronized (this) {
                    Response response = (Response)response_map.get( key );
                    if (response == null) {
                        if (log.level >= 4)
                            log.println( "Invalid key, skipping message" );
                        doSkip();

            return;
        }
        if (Features.consumerPom(session.getUserProperties())) {
            Path buildDir =
                    project.getBuild() != null ? Paths.get(project.getBuild().getDirectory()) : null;
            if (buildDir != null) {
                Files.createDirectories(buildDir);
            }
            Path consumer = buildDir != null