"responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {
                                "application/json": {
                                    "schema": {
                                        "title": "Response Items-Get Items",
                                        "type": "array",

                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

## HTTPX { #httpx }

Even if your **FastAPI** application uses normal `def` functions instead of `async def`, it is still an `async` application underneath.

Deploying a **FastAPI** application is relatively easy.

## What Does Deployment Mean { #what-does-deployment-mean }

To **deploy** an application means to perform the necessary steps to make it **available to the users**.

running on the server (the machine, host, etc.) and **managing all the HTTPS parts**: receiving the **encrypted HTTPS requests**, sending the **decrypted HTTP requests** to the actual HTTP application running in the same server (the **FastAPI** application, in this case), take the **HTTP response** from the application, **encrypt it** using the appropriate **HTTPS certificate** and sending it back to the client using **HTTPS**. This server is often called a **<a href="https://en.wikipedia.org/wiki/TL...

                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {

    }

    /**
     * Returns the application type identifier for this Fess application.
     *
     * @return the application type string "FES"
     */
    @Override
    protected String myAppType() { // for framework
        return APP_TYPE;
    }

    /**
     * Returns the user type identifier for this application.
     *

                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {

				"application/ccxml+xml",
				"application/cea-2018+xml",
				"application/cellml+xml",
				"application/cnrp+xml",
				"application/commonground",
				"application/conference-info+xml",
				"application/cpl+xml",
				"application/csta+xml",
				"application/cstadata+xml",
				"application/cu-seeme",
				"application/cybercash",
				"application/davmount+xml",
				"application/dca-rft",
				"application/dec-dx",

         */
        OptionalThing<FessUserBean> supply();
    }

    /**
     * The supplier of application type.
     */
    @FunctionalInterface
    public interface AppTypeSupplier {
        /**
         * Supply the application type.
         * @return The application type.
         */
        String supply();
    }