# 全局依赖项

有时，我们要为整个应用添加依赖项。

通过与定义[*路径装饰器依赖项*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank} 类似的方式，可以把依赖项添加至整个 `FastAPI` 应用。

这样一来，就可以为所有*路径操作*应用该依赖项：

{* ../../docs_src/dependencies/tutorial012.py hl[15] *}

[*路径装饰器依赖项*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank} 一章的思路均适用于全局依赖项， 在本例中，这些依赖项可以用于应用中的所有*路径操作*。

## 为一组路径操作定义依赖项

    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/user/": {
                "post": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",

		req.Header.Set("Expires", expiresStr)
	}

	// url.RawPath will be valid if path has any encoded characters, if not it will
	// be empty - in which case we need to consider url.Path (bug in net/http?)
	encodedResource := req.URL.RawPath
	encodedQuery := req.URL.RawQuery
	if encodedResource == "" {
		splits := strings.SplitN(req.URL.Path, "?", 2)
		encodedResource = splits[0]
		if len(splits) == 2 {
			encodedQuery = splits[1]

 *
 * <pre>{@code
 * UrlConvertHelper helper = new UrlConvertHelper();
 * helper.add("old-domain.com", "new-domain.com");
 * String convertedUrl = helper.convert("http://old-domain.com/path");
 * // convertedUrl will be "http://new-domain.com/path"
 * }</pre>
 */
/**
 * This class is a helper for URL conversion.
 */
public class UrlConvertHelper {

    /**
     * Creates a new UrlConvertHelper instance.
     */

	"fmt"
	"io"
	"log"
	"net/http"
	"strings"
)

var (
	keyFile  string
	certFile string
)

func init() {
	flag.StringVar(&keyFile, "key-file", "", "Path to TLS cert key file")
	flag.StringVar(&certFile, "cert-file", "", "Path to TLS cert file")
}

func writeErrorResponse(w http.ResponseWriter, err error) {
	w.WriteHeader(http.StatusBadRequest)
	json.NewEncoder(w).Encode(map[string]string{

    }

    @Test
    @DisplayName("available() on SMB2 returns peeked byte count and interacts with tree")
    void available_smb2_happyPath() throws Exception {
        // Verify SMB2 path: IOCTL peek result is returned and resources are closed
        SmbPipeInputStream stream = newStreamWithMinimalStubs(true);

        // Arrange mocks for available()
        when(handle.ensureOpen()).thenReturn(fd);

  private lateinit var compactTable: IdnaMappingTable

  @BeforeEach
  fun setUp() {
    val path = "/okhttp3/internal/idna/IdnaMappingTable.txt".toPath()
    val plainTable =
      FileSystem.RESOURCES.read(path) {
        readPlainTextIdnaMappingTable()
      }
    table = plainTable
    val data = buildIdnaMappingTableData(plainTable)
    compactTable =
      IdnaMappingTable(

        assertTrue(options.directory().isPresent(), "--directory option should be present");
        assertEquals("/some/path", options.directory().get(), "--directory should be /some/path");
    }

    @Test
    void testGoalsParsing() throws ParseException {
        String[] args = {"apply", "--plugins"};
        CommonsCliUpgradeOptions options = CommonsCliUpgradeOptions.parse(args);

    * ユーザーがクエリ`q`を提供しなかった場合、クッキーに保存していた最後に使用したクエリを使用します。

### 依存関係の使用

以下のように依存関係を使用することができます:

{* ../../docs_src/dependencies/tutorial005.py hl[21] *}

/// info | 情報

*path operation関数*の中で宣言している依存関係は`query_or_cookie_extractor`の１つだけであることに注意してください。

しかし、**FastAPI** は`query_extractor`を最初に解決し、その結果を`query_or_cookie_extractor`を呼び出す時に渡す必要があることを知っています。

///

```mermaid
graph TB

    val persistent: Boolean = cookie.persistent()
    val expiresAt: Long = cookie.expiresAt()
    val hostOnly: Boolean = cookie.hostOnly()
    val domain: String = cookie.domain()
    val path: String = cookie.path()
    val httpOnly: Boolean = cookie.httpOnly()
    val secure: Boolean = cookie.secure()
  }

  @Test @Disabled
  fun formBody() {
    val formBody: FormBody = FormBody.Builder().build()