In the next chapters, I'll give you more **concrete recipes** to deploy FastAPI applications.

But for now, let's check these important **conceptual ideas**. These concepts also apply to any other type of web API. 💡

## Security - HTTPS

In the [previous chapter about HTTPS](https.md){.internal-link target=_blank} we learned about how HTTPS provides encryption for your API.

		// 403, but in situations where there is a dependency
		// with the caller to take the client offline purpose
		// fully it should make sure to respond with '412'
		// instead, see cmd/storage-rest-server.go for ideas.
		if c.HealthCheckFn != nil && resp.StatusCode == http.StatusPreconditionFailed {
			err = fmt.Errorf("Marking %s offline temporarily; caused by PreconditionFailed with drive ID mismatch", c.url.Host)

The most common way to do it is to have a file `requirements.txt` with the package names and their versions, one per line.

You would of course use the same ideas you read in [About FastAPI versions](versions.md){.internal-link target=_blank} to set the ranges of versions.

For example, your `requirements.txt` could look like:

```
fastapi>=0.112.0,<0.113.0

* A [Java Development Kit](http://jdk.java.net/) (JDK) **version 11**. Fixed version is required to use [remote cache](#remote-build-cache). 
* A text editor or IDE. We use and recommend [IntelliJ IDEA CE](http://www.jetbrains.com/idea/).  IntelliJ Ultimate will also work. You'll need IntelliJ 2021.2.2 or newer.
* [git](https://git-scm.com/) and a [GitHub account](https://github.com/join).

/libraries/tools/kotlin-gradle-plugin-dsl-codegen/ "Kotlin Build Tools" "Kotlin Apple Ecosystem"
/libraries/tools/kotlin-gradle-plugin-idea/ "Kotlin Build Tools"
/libraries/tools/kotlin-gradle-plugin-idea-for-compatibility-tests/ "Kotlin Build Tools"
/libraries/tools/kotlin-gradle-plugin-idea-proto/ "Kotlin Build Tools"
/libraries/tools/kotlin-gradle-plugin-integration-tests/ "Kotlin Build Tools" "Kotlin Apple Ecosystem"

      "coverage" : {
        "per_day" : [ "linux" ]
      }
    } ]
  }, {
    "testId" : "org.gradle.performance.regression.corefeature.IdeIntegrationPerformanceTest.idea",
    "groups" : [ {
      "testProject" : "largeJavaMultiProject",
      "coverage" : {
        "per_day" : [ "linux" ]
      }
    }, {
      "testProject" : "largeMonolithicJavaProject",

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}
```

but this time at the URL with the prefix path provided by the proxy: `/api/v1`.

Of course, the idea here is that everyone would access the app through the proxy, so the version with the path prefix `/api/v1` is the "correct" one.

			<version>${tomcat.version}</version>
			<!-- Disable scope at development on IDEA -->
			<scope>provided</scope>
		</dependency>
		<dependency><!-- for jsp -->
			<groupId>org.apache.tomcat.embed</groupId>
			<artifactId>tomcat-embed-jasper</artifactId>
			<version>${tomcat.version}</version>
			<!-- Disable scope at development on IDEA -->
			<scope>provided</scope>
		</dependency>

		<!-- test -->

import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
import org.jetbrains.kotlin.descriptors.annotations.AnnotationUseSiteTarget
import org.jetbrains.kotlin.descriptors.impl.*
import org.jetbrains.kotlin.idea.KotlinLanguage
import org.jetbrains.kotlin.load.java.descriptors.JavaCallableMemberDescriptor
import org.jetbrains.kotlin.load.java.descriptors.JavaClassDescriptor

    * Sistemas de generación automática de código de cliente para muchos lenguajes.
* Proveer directamente 2 interfaces de documentación web interactivas.

---

Hasta ahora, escasamente vimos lo básico pero ya tienes una idea de cómo funciona.

Intenta cambiando la línea a:

```Python
    return {"item_name": item.name, "item_id": item_id}
```

...de:

```Python
        ... "item_name": item.name ...
```