با **FastAPI** شما تمام ویژگی های **Starlette** را خواهید داشت (زیرا FastAPI یک نسخه و نمونه به تمام معنا از Starlette است):

* عملکرد به طورجدی چشمگیر. <a href="https://github.com/encode/starlette#performance" class="external-link" target="_blank">این یکی از سریعترین فریم ورک های موجود در پایتون است که همتراز با **نود جی اس** و **گو**</a> است.
* پشتیبانی از **WebSocket**.

   * java.nio.file.Files#newBufferedWriter(java.nio.file.Path, Charset,
   * java.nio.file.OpenOption...)}.
   *
   * @param file the file to write to
   * @param charset the charset used to encode the output stream; see {@link StandardCharsets} for
   *     helpful predefined constants
   * @return the buffered writer
   */

因此，我们下一步要做的就是添加代码，为从 API 接收回调的*外部 API*存档。

这部分文档在 `/docs` 下的 Swagger API 文档中显示，并且会告诉外部开发者如何构建*外部 API*。

本例没有实现回调本身（只是一行代码），只有文档部分。

/// tip | "提示"

实际的回调只是 HTTP 请求。

实现回调时，要使用 <a href="https://www.encode.io/httpx/" class="external-link" target="_blank">HTTPX</a> 或 <a href="https://requests.readthedocs.io/" class="external-link" target="_blank">Requests</a>。

///

## 编写回调文档代码

应用不执行这部分代码，只是用它来*记录 外部 API* 。

      if (declaringClass.getEnclosingConstructor() != null) {
        // Enclosed in a constructor, needs hidden this
        return true;
      }
      Method enclosingMethod = declaringClass.getEnclosingMethod();
      if (enclosingMethod != null) {
        // Enclosed in a method, if it's not static, must need hidden this.
        return !Modifier.isStatic(enclosingMethod.getModifiers());

                    // skip
                    continue;
                }
                try {
                    final String[] permissions = split(getValue(list, 2), ",").get(stream -> stream.map(permissionHelper::encode)
                            .filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));
                    final String[] labels = split(getValue(list, 3), ",")

            final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();
            entity.setPermissions(split(form.permissions, "\n").get(stream -> stream.map(s -> permissionHelper.encode(s))
                    .filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n])));
            entity.setVirtualHosts(split(form.virtualHosts, "\n")

            final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();
            entity.setPermissions(split(form.permissions, "\n").get(stream -> stream.map(s -> permissionHelper.encode(s))
                    .filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n])));
            entity.setVirtualHosts(split(form.virtualHosts, "\n")

  }

  public void testToString() {
    byte[] data = new byte[] {127, -128, 5, -1, 14};
    assertEquals("7f8005ff0e", HashCode.fromBytes(data).toString());
    assertEquals("7f8005ff0e", base16().lowerCase().encode(data));
  }

  public void testHashCode_nulls() throws Exception {
    sanityTester().testNulls();
  }

  public void testHashCode_equalsAndSerializable() throws Exception {

        NdrBuffer buf = new NdrBuffer(out, 0);

        msg.flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
        msg.call_id = call_id.incrementAndGet();

        msg.encode(buf);

        if ( this.securityProvider != null ) {
            buf.setIndex(0);
            this.securityProvider.wrap(buf);
        }
        return buf;
    }


    /**
     * 

```

### Using xl-meta

Executing `xl-meta` will look for an `xl.meta` in the current folder and decode it to JSON. It is also possible to specify multiple files or wildcards, for example `xl-meta ./**/xl.meta` will output decoded metadata recursively. It is possible to view what inline data is stored inline in the metadata using `--data` parameter `xl-meta -data xl.json` will display an id -> data size. To export inline data to a file use the `--export` option.