# Generating SDKs { #generating-sdks }

Because **FastAPI** is based on the **OpenAPI** specification, its APIs can be described in a standard format that many tools understand.

This makes it easy to generate up-to-date **documentation**, client libraries (<abbr title="Software Development Kits">**SDKs**</abbr>) in multiple languages, and **testing** or **automation workflows** that stay in sync with your code.

      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a
      file or class name and description of purpose be included on the
      same "printed page" as the copyright notice for easier
      identification within third-party archives.

        assertEquals("test index name", builder.settingsIndexName);
    }

    @Test
    public void testVariousTimeoutFormats() {
        // Test various timeout format strings
        builder.scrollTimeout("1000ms")
                .searchTimeout("1m")
                .indexTimeout("1h")
                .bulkTimeout("1d")
                .indicesTimeout("500")

/**
 * A utility class for building query strings with proper escaping and parameters.
 * This class provides methods to construct search queries from various parameters,
 * handle special characters, and format the final query string for search operations.
 */
public class QueryStringBuilder {

    private static final String OR_ALT = " || ";

    private static final String OR = " OR ";

        // Should be valid base64
        assertTrue(encryptedStr.matches("^[A-Za-z0-9+/]*={0,2}$"), "Should be valid Base64 format");

        // Decrypt from string
        char[] decrypted = storage.decryptFromString(encryptedStr);
        assertArrayEquals(plaintext, decrypted, "Decrypted string should match original");

        // Clean up

				Content:  []byte("This small file is in ZIP64 format.\n"),
				Modified: time.Date(2012, 8, 10, 14, 33, 32, 0, time.UTC),
				Mode:     0644,
			},
		},
	},
	// Another zip64 file with different Extras fields. (golang.org/issue/7069)
	{
		Name: "zip64-2.zip",
		File: []ZipTestFile{
			{
				Name:     "README",
				Content:  []byte("This small file is in ZIP64 format.\n"),

     */
    int FLAGS2_EXTENDED_SECURITY_NEGOTIATION = 0x0800;
    /**
     * Resolve paths in Distributed File System flag.
     */
    int FLAGS2_RESOLVE_PATHS_IN_DFS = 0x1000;
    /**
     * Permit read if execute permission flag.
     */
    int FLAGS2_PERMIT_READ_IF_EXECUTE_PERM = 0x2000;
    /**
     * Use 32-bit status codes flag.
     */
    int FLAGS2_STATUS32 = 0x4000;
    /**

import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletRequest;

/**
 * This class returns a list of a role from a request parameter,
 * a request header and a cookie. The format of the default value
 * is "[\d]+\nrole1,role2,role3", which you can encrypt.
 *
 *
 */
public class RoleQueryHelper {

    /**
     * Constructor.
     */
    public RoleQueryHelper() {

        assertEquals(original.getMessage(), retry.getMessage());
        assertEquals(original.getCause(), retry.getCause());
        assertNotNull(retry.getContext());
    }

    @Test
    @DisplayName("Should format message correctly")
    void testMessageFormatting() {
        // With custom message
        exception = new SmbOperationException(SmbOperationException.ErrorCode.FILE_EXISTS, "document.pdf already exists");

func getReqAccessKeyV2(r *http.Request) (auth.Credentials, bool, APIErrorCode) {
	if accessKey := r.Form.Get(xhttp.AmzAccessKeyID); accessKey != "" {
		return checkKeyValid(r, accessKey)
	}

	// below is V2 Signed Auth header format, splitting on `space` (after the `AWS` string).
	// Authorization = "AWS" + " " + AWSAccessKeyId + ":" + Signature
	authFields := strings.Split(r.Header.Get(xhttp.Authorization), " ")
	if len(authFields) != 2 {