# Sub Applications - Mounts

If you need to have two independent FastAPI applications, with their own independent OpenAPI and their own docs UIs, you can have a main app and "mount" one (or more) sub-application(s).

## Mounting a **FastAPI** application

"Mounting" means adding a completely "independent" application in a specific path, that then takes care of handling everything under that path, with the _path operations_ declared in that sub-application.

        .build(),
    )
    val urlC = server.url("/c")
    assertThat(get(urlC).body.string()).isEqualTo("c")

    // Confirm the iterator returns those responses...
    val i: Iterator<String> = cache.urls()
    assertThat(i.hasNext()).isTrue()
    assertThat(i.next()).isEqualTo(urlA.toString())
    assertThat(i.hasNext()).isTrue()
    assertThat(i.next()).isEqualTo(urlB.toString())
    assertThat(i.hasNext()).isTrue()

	public final fun scheme ()Ljava/lang/String;
	public fun toString ()Ljava/lang/String;
	public final fun topPrivateDomain ()Ljava/lang/String;
	public final fun uri ()Ljava/net/URI;
	public final fun url ()Ljava/net/URL;
	public final fun username ()Ljava/lang/String;
}

public final class okhttp3/HttpUrl$Builder {
	public fun <init> ()V

			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         RedirectURIDynamic,
			Description: `Enable 'Host' header based dynamic redirect URI` + defaultHelpPostfix(RedirectURIDynamic),
			Optional:    true,
			Type:        "on|off",
		},
		config.HelpKV{
			Key:         ClaimPrefix,

)

func TestDashboard(t *testing.T) {
	cases := []testutil.TestCase{
		{ // case 0
			Args:           strings.Split("--browser=false", " "),
			ExpectedRegexp: regexp.MustCompile("Access to Istio web UIs"),
		},
		{ // case 1
			Args:           strings.Split("invalid --browser=false", " "),
			ExpectedRegexp: regexp.MustCompile(`unknown dashboard "invalid"`),
			WantException:  true,
		},
		{ // case 2

     * Sets the URL target of this request.
     *
     * @throws IllegalArgumentException if [url] is not a valid HTTP or HTTPS URL. Avoid this
     *     exception by calling [HttpUrl.parse]; it returns null for invalid URLs.
     */
    open fun url(url: String): Builder {
      return url(canonicalUrl(url).toHttpUrl())
    }

    /**
     * Sets the URL target of this request.
     *

    `DurationUnit` which was a typealias in 1.5.x.
 *  Upgrade: [Okio 3.2.0][okio_3_2_0].


## Version 5.0.0-alpha.9

_2022-06-16_

 *  New: Enforce label length limits in URLs. `HttpUrl` now rejects URLs whose domains aren't valid.
    This includes overly-long domain names (longer than 253 characters), overly-long labels (more
    than 63 characters between dots), and empty labels.

     */
    @Nonnull
    InputStream openStream() throws IOException;

    /**
     * Provides a user-friendly hint about the location of the source.
     * This could be a local file path, a URI or just an empty string.
     * The intention is to assist users during error reporting.
     *
     * @return a user-friendly hint about the location of the source, never {@code null}
     */
    @Nonnull

            }
        }
    }

    public void test_doGet_accessTimeoutTarget() {
        FtpClient client = new FtpClient() {
            @Override
            protected ResponseData getResponseData(final String uri, final boolean includeContent) {
                try {
                    Thread.sleep(10000);
                } catch (InterruptedException e) {
                    throw new CrawlingAccessException(e);
                }

public class Config {

    private static final Logger log = LoggerFactory.getLogger(Config.class);


    /**
     * This static method registers the SMB URL protocol handler which is
     * required to use SMB URLs with the <tt>java.net.URL</tt> class. If this
     * method is not called before attempting to create an SMB URL with the
     * URL class the following exception will occur:
     * <blockquote>
     * 
     * <pre>