For example, you could identify a "car" or a "blog post".

Then you could add permissions about that entity, like "drive" (for the car) or "edit" (for the blog).

And then, you could give that JWT token to a user (or bot), and they could use it to perform those actions (drive the car, or edit the blog post) without even needing to have an account, just with the JWT token your API generated for that.

而当使用默认的 `Depends(scope="request")` 时，`yield` 之后的退出代码会在响应发送之后执行。

你可以在文档 [带 `yield` 的依赖项 - 提前退出与 `scope`](../tutorial/dependencies/dependencies-with-yield.md#early-exit-and-scope) 中了解更多。

### 带 `yield` 的依赖项与 `StreamingResponse`（技术细节） { #dependencies-with-yield-and-streamingresponse-technical-details }

在 FastAPI 0.118.0 之前，如果你使用带 `yield` 的依赖项，它会在*路径操作函数*返回后、发送响应之前运行 `yield` 之后的退出代码。

                                                            <la:link
                                                                    href="/admin/searchlist/edit?crudMode=2&amp;doc.doc_id=${f:u(doc.doc_id)}&amp;q=${f:u(q)}"
                                                                    styleClass="btn btn-primary btn-xs">

          coordinatorWakeUpAt = now + minDelayNanos
          try {
            backend.coordinatorWait(this@TaskRunner, minDelayNanos)
          } catch (_: InterruptedException) {
            // Will cause all tasks to exit unless more are scheduled!
            cancelAll()
          } finally {
            coordinatorWaiting = false
          }
        }
      }
    }
  }

    logging.info(f"PR #{pr.number} has labels: {label_strs}")
    if not langs or lang_all_label not in label_strs:
        logging.info(f"PR #{pr.number} doesn't seem to be a translation PR, skipping")
        sys.exit(0)

    # Generate translation map, lang ID to discussion
    discussions = get_graphql_translation_discussions(settings=settings)
    lang_to_discussion_map: dict[str, AllDiscussionsDiscussionNode] = {}

// Code generated by github.com/tinylib/msgp DO NOT EDIT.

package grid

import (
	"github.com/tinylib/msgp/msgp"
)

// DecodeMsg implements msgp.Decodable
func (z *testRequest) DecodeMsg(dc *msgp.Reader) (err error) {
	var field []byte
	_ = field
	var zb0001 uint32
	zb0001, err = dc.ReadMapHeader()
	if err != nil {
		err = msgp.WrapError(err)
		return
	}
	for zb0001 > 0 {
		zb0001--
		field, err = dc.ReadMapKeyPtr()

        --add Microsoft.VisualStudio.Component.VC.14.39.17.9.x86.64 \
        --add Microsoft.VisualStudio.Component.Windows11SDK.22621 \
        --add Microsoft.VisualStudio.Component.VC.ATL \
 || IF "%ERRORLEVEL%"=="3010" EXIT 0

SHELL ["powershell.exe", "-ExecutionPolicy", "Bypass", "-Command", \
       "$ErrorActionPreference='Stop'; $ProgressPreference='SilentlyContinue'; $VerbosePreference = 'Continue';"]

# Install Clang.

  ;;
*)
  echo "Usage: $0 {devtoolset-7|devtoolset-9} <target-directory>"
  echo "Use 'devtoolset-7' to build a manylinux2010 compatible toolchain or 'devtoolset-9' to build a manylinux2014 compatible toolchain"
  exit 1
  ;;
esac

mkdir -p "${TARGET}"

# Download glibc's shared and development libraries based on the value of the
# `VERSION` parameter.
# Note: 'Templatizing' this and the other conditional branches would require

                                    </div>
                                </div>
                                <div class="card-footer">
                                    <button type="submit" class="btn btn-primary" name="edit"
                                            value="<la:message key="labels.design_edit_button" />">
                                        <i class="fa fa-pencil-alt" aria-hidden="true"></i>

                    // ignore
                }
                metadataFile.delete(); // if this fails, forget about it, we'll try to overwrite it anyway so no need
                // to delete on exit
            }
        } else if (metadataFile.exists()) {
            try (InputStream input = Files.newInputStream(metadataFile.toPath())) {
                metadata = new Metadata(new MetadataStaxReader().read(input, false));