req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, bytes.NewReader(buf))
	if err != nil {
		return err
	}

	if token != "" {
		req.Header.Set("Authorization", token)
	}
	req.Header.Set("Content-Type", "application/json")

	clnt := http.Client{Transport: getRemoteInstanceTransport()}
	resp, err := clnt.Do(req)
	if err != nil {
		return err
	}

	xhttp.DrainBody(resp.Body)

    #  However, detail packages have default value so basically
    #  you only have to specify the property 'packageBase'.
    #  If this property is specified and detail package properties is not specified, 
    #  Then the packages of generated class are as follows:
    #
    #  e.g. packageBase = org.docksidestage.dbflute
    #      --> org.docksidestage.dbflute.allcommon
    #      --> org.docksidestage.dbflute.bsbhv

   * While intuitively, using CharsetEncoder to encode the CharSequence directly to the buffer (or
   * even to an intermediate buffer) should be considerably more efficient than potentially
   * copying the CharSequence to a String and then calling getBytes(Charset) on that String, in
   * reality there are optimizations that make the getBytes(Charset) approach considerably faster,
   * at least for commonly used charsets like UTF-8.
   */

  @Override

      if (c != '\t' && c != '\n' && c != '\r') {
        builder.addEscape(c, "\uFFFD");
      }
    }

    // Build the content escaper first and then add quote escaping for the
    // general escaper.
    builder.addEscape('&', "&");
    builder.addEscape('<', "&lt;");
    builder.addEscape('>', "&gt;");
    XML_CONTENT_ESCAPER = builder.build();

   *
   * <p>This bug is this: if you create an iterator from a TreeSet and call next() on that iterator
   * when hasNext() is false, so that next() throws a NoSuchElementException, then subsequent calls
   * to remove() will incorrectly throw an IllegalStateException, instead of removing the last
   * element returned.
   *
   * <p>See <a href="https://bugs.openjdk.org/browse/JDK-6529795">JDK-6529795</a>

            byte[] wideBytes = str.getBytes(StandardCharsets.UTF_16LE);
            int charCount = str.length();

            // NDR string structure: MaximumCount, Offset, ActualCount, then data
            buf.enc_ndr_long(charCount + 1); // MaximumCount (including null terminator)
            buf.enc_ndr_long(0); // Offset
            buf.enc_ndr_long(charCount + 1); // ActualCount (including null terminator)

        CIFSContext ctx = mock(CIFSContext.class);
        SmbTreeConnectionTrace delegate = Mockito.spy(new SmbTreeConnectionTrace(ctx));

        // Act: create wrapper using delegate, then acquire and release once
        SmbTreeConnectionTrace wrapper = new SmbTreeConnectionTrace(delegate);
        wrapper.acquire();
        wrapper.release();

Sie verfügt über eine `GET`-Operation, die einen Fehler zurückgeben könnte.

Sie verfügt über eine `POST`-Operation, die mehrere Fehler zurückgeben könnte.

Beide *Pfadoperationen* erfordern einen `X-Token`-Header.

{* ../../docs_src/app_testing/app_b_an_py310/main.py *}

### Erweiterte Testdatei { #extended-testing-file }

Anschließend könnten Sie `test_main.py` mit den erweiterten Tests aktualisieren:

# Delete modules that should be hidden from dir().
# Don't fail if these modules are not available.
# For e.g. this file will be originally placed under tensorflow/_api/v1 which
# does not have "python", "core" directories. Then, it will be copied
# to tensorflow/ which does have these two directories.

try:
  del python
except NameError:
  pass
try:
  del core
except NameError:
  pass
try:
  del compiler

我們稍後會把這個 `APIRouter` 加進主要的 `FastAPI` 應用程式中，但先來看看相依性與另一個 `APIRouter`。

## 相依性 { #dependencies }

我們發現應用程式的多個地方會用到一些相依性。

所以把它們放進獨立的 `dependencies` 模組（`app/dependencies.py`）。

接下來我們會用一個簡單的相依性來讀取自訂的 `X-Token` 標頭：

{* ../../docs_src/bigger_applications/app_an_py310/dependencies.py hl[3,6:8] title["app/dependencies.py"] *}

/// tip | 提示

為了簡化範例，我們使用了一個虛構的標頭。

但在真實情況下，使用內建的 [安全工具](security/index.md) 會有更好的效果。