freeCodeCamp/curriculum/challenges/espanol/05-back-end-development-and-apis/back-end-development-and-apis-projects/request-header-parser-microservice.md

---
id: bd7158d8c443edefaeb5bdff
title: Request Header Parser Microservice
challengeType: 4
forumTopicId: 301507
dashedName: request-header-parser-microservice
---

# --description--

Build a full stack JavaScript app that is functionally similar to this: <https://request-header-parser-microservice.freecodecamp.rocks/>. Working on this project will involve you writing your code using one of the following methods:

-   Clone [this GitHub repo](https://github.com/freeCodeCamp/boilerplate-project-headerparser/) and complete your project locally.
-   Use [our Replit starter project](https://replit.com/github/freeCodeCamp/boilerplate-project-headerparser) to complete your project.
-   Use a site builder of your choice to complete the project. Be sure to incorporate all the files from our GitHub repo.

When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the `Solution Link` field. Optionally, also submit a link to your project's source code in the `GitHub Link` field.

# --hints--

You should provide your own project, not the example URL.

```js
(getUserInput) => {
  assert(
    !/.*\/request-header-parser-microservice\.freecodecamp\.rocks/.test(
      getUserInput('url')
    )
  );
};
```

A request to `/api/whoami` should return a JSON object with your IP address in the `ipaddress` key.

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/whoami').then(
    (data) => assert(data.ipaddress && data.ipaddress.length > 0),
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

A request to `/api/whoami` should return a JSON object with your preferred language in the `language` key.

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/whoami').then(
    (data) => assert(data.language && data.language.length > 0),
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

A request to `/api/whoami` should return a JSON object with your software in the `software` key.

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/whoami').then(
    (data) => assert(data.software && data.software.length > 0),
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

# --solutions--

```js
/**
  Backend challenges don't need solutions, 
  because they would need to be tested against a full working project. 
  Please check our contributing guidelines to learn more.
*/
```