{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[1,23] *}

### Create the callback *path operation* { #create-the-callback-path-operation }

To create the callback *path operation* use the same `APIRouter` you created above.

It should look just like a normal FastAPI *path operation*:

* It should probably have a declaration of the body it should receive, e.g. `body: InvoiceEvent`.

import jakarta.validation.constraints.Size;

/**
 * Form class for editing path mapping configurations in the admin interface.
 * This form extends CreateForm to include fields necessary for updating existing path map entries,
 * including tracking information for optimistic locking and audit trails.
 * Path mappings are used to transform document URLs and paths during indexing and display.
 *
 */

    /**
     * Guesses the content type.
     *
     * @param path
     *            The path. Must not be {@literal null} or an empty string.
     * @return The content type.
     */
    public static String guessContentType(final String path) {
        assertArgumentNotEmpty("path", path);

        final InputStream is = ResourceUtil.getResourceAsStream(path);
        try {

        Path path = rootBuildDirectory.resolve(RESUME_PROPERTIES_FILENAME);
        if (!Files.exists(path)) {
            LOGGER.warn("The {} file does not exist. The --resume / -r feature will not work.", path);
            return properties;
        }

        try (Reader reader = Files.newBufferedReader(path)) {
            properties.load(reader);
        } catch (IOException e) {

func getFileInfoVersions(xlMetaBuf []byte, volume, path string, inclFreeVersions bool) (FileInfoVersions, error) {
	fivs, err := getAllFileInfoVersions(xlMetaBuf, volume, path, true)
	if err != nil {
		return fivs, err
	}

	// If inclFreeVersions is false, partition the versions in fivs.Versions
	// such that finally fivs.Versions has

            // expected failure: wrong relative path calculation
            assertTrue(
                    afe.getMessage()
                            .contains(
                                    "Expected text value 'http://www.apache.org/path/to/parent/child-artifact-id/' but was "
                                            + "'http://www.apache.org/path/to/parent/../child-artifact-id/'"),

        assertEquals(maxFlags, maxAvFlags.getFlags(), "Flags should match Integer.MAX_VALUE");

        // Test with minimum integer value
        int minFlags = Integer.MIN_VALUE;
        AvFlags minAvFlags = new AvFlags(minFlags);
        assertNotNull(minAvFlags, "AvFlags object should not be null for min flags");
        assertEquals(minFlags, minAvFlags.getFlags(), "Flags should match Integer.MIN_VALUE");

        // Test with a negative integer

		<property name="name">"msofficeThumbnailGenerator"</property>
		<property name="commandList">
			["${path}/generate-thumbnail",
			"msoffice",
			"${url}",
			"${outputFile}"]
		</property>
		<property name="generatorList">
			["${path}/generate-thumbnail"]
		</property>
		<postConstruct name="addCondition">
			<arg>"mimetype"</arg>

# Body - Birden Fazla Parametre { #body-multiple-parameters }

Artık `Path` ve `Query` kullanmayı gördüğümüze göre, request body bildirimlerinin daha ileri kullanım senaryolarına bakalım.

## `Path`, `Query` ve body parametrelerini karıştırma { #mix-path-query-and-body-parameters }

Öncelikle, elbette `Path`, `Query` ve request body parametre bildirimlerini serbestçe karıştırabilirsiniz ve **FastAPI** ne yapacağını bilir.

     * @param path The FTP path to check.
     * @return true if it matches, false otherwise.
     */
    boolean matches(final String path) {
        if (StringUtil.isBlank(path)) {
            return false;
        }

        try {
            final int pos = path.indexOf('/', 6);
            final URI uri = new URI(pos == -1 ? path : path.substring(0, pos));