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**.

     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Waiting for application startup.
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Waiting for application startup.
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Waiting for application startup.

#         ; propertiesHtmlList = list:{ [env or config or label or message] }
#     }
#     ; appMap = map:{
#         ; [application name, camel case, initial uncapitalised] = map:{
#             ; path = [relative path to application project from DBFlute client]
#             ; freeGenList = list:{ [env or config or label or message or html] }

## HTTPX { #httpx }

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

        @DisplayName("Should return correct mime type for multiple extensions")
        @CsvSource({ "txt, text/plain", "css, text/css", "js, application/x-javascript", "zip, application/zip", "tar, application/x-tar",
                "gz, application/x-gzip", "tiff, image/tiff", "tif, image/tiff" })
        void testVariousExtensions(String extension, String expectedMimeType) throws IOException {
            assertEquals(expectedMimeType, mimeMap.getMimeType(extension));

  public void testAddDelayedShutdownHook_success() throws InterruptedException {
    TestApplication application = new TestApplication();
    ExecutorService service = mock(ExecutorService.class);
    application.addDelayedShutdownHook(service, 2, SECONDS);
    verify(service, never()).shutdown();
    application.shutdown();
    InOrder shutdownFirst = inOrder(service);
    shutdownFirst.verify(service).shutdown();

        headers.put("Content-Type", Arrays.asList("application/json"));
        headers.put("CONTENT-LENGTH", Arrays.asList("100"));
        headers.put("accept-encoding", Arrays.asList("gzip"));
        response.setHeaders(headers);

        // All header access should be case-insensitive
        assertEquals("application/json", response.getHeaderValue("content-type"));
        assertEquals("application/json", response.getHeaderValue("CONTENT-TYPE"));

        if (testToken != null) {
            return;
        }
        given().contentType("application/json").delete(getEsUrl() + "/fess_config.access_token/_doc/" + DEFAULT_TEST_TOKEN_ID);
    }

    public static void refresh() {
        given().contentType("application/json").post(getEsUrl() + "/_refresh");
    }

    public static String getFessUrl() {

# Bigger Applications - Multiple Files { #bigger-applications-multiple-files }

If you are building an application or a web API, it's rarely the case that you can put everything in a single file.

**FastAPI** provides a convenience tool to structure your application while keeping all the flexibility.

/// info

If you come from Flask, this would be the equivalent of Flask's Blueprints.

///

## An example file structure { #an-example-file-structure }

     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Waiting for application startup.
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Application startup complete.