freeCodeCamp/curriculum/challenges/chinese/05-apis-and-microservices/apis-and-microservices-projects/timestamp-microservice.md

---
id: bd7158d8c443edefaeb5bdef
title: Timestamp Microservice
challengeType: 4
forumTopicId: 301508
dashedName: timestamp-microservice
---

# --description--

Build a full stack JavaScript app that is functionally similar to this: <https://timestamp-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-timestamp/) and complete your project locally.
-   Use [our repl.it starter project](https://repl.it/github/freeCodeCamp/boilerplate-project-timestamp) 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 projects source code in the `GitHub Link` field.

# --hints--

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

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

A request to `/api/timestamp/:date?` with a valid date should return a JSON object with a `unix` key that is a Unix timestamp of the input date in milliseconds

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/timestamp/2016-12-25').then(
    (data) => {
      assert.equal(
        data.unix,
        1482624000000,
        'Should be a valid unix timestamp'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

A request to `/api/timestamp/:date?` with a valid date should return a JSON object with a `utc` key that is a string of the input date in the format: `Thu, 01 Jan 1970 00:00:00 GMT`

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/timestamp/2016-12-25').then(
    (data) => {
      assert.equal(
        data.utc,
        'Sun, 25 Dec 2016 00:00:00 GMT',
        'Should be a valid UTC date string'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

A request to `/api/timestamp/1451001600000` should return `{ unix: 1451001600000, utc: "Fri, 25 Dec 2015 00:00:00 GMT" }`

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/timestamp/1451001600000').then(
    (data) => {
      assert(
        data.unix === 1451001600000 &&
          data.utc === 'Fri, 25 Dec 2015 00:00:00 GMT'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

Your project can handle dates that can be successfully parsed by `new Date(date_string)`

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/timestamp/05 October 2011').then(
    (data) => {
      assert(
        data.unix === 1317772800000 &&
          data.utc === 'Wed, 05 Oct 2011 00:00:00 GMT'
      );
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

If the input date string is invalid, the api returns an object having the structure `{ error : "Invalid Date" }`

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/timestamp/this-is-not-a-date').then(
    (data) => {
      assert.equal(data.error.toLowerCase(), 'invalid date');
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

An empty date parameter should return the current time in a JSON object with a `unix` key

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/timestamp').then(
    (data) => {
      var now = Date.now();
      assert.approximately(data.unix, now, 20000);
    },
    (xhr) => {
      throw new Error(xhr.responseText);
    }
  );
```

An empty date parameter should return the current time in a JSON object with a `utc` key

```js
(getUserInput) =>
  $.get(getUserInput('url') + '/api/timestamp').then(
    (data) => {
      var now = Date.now();
      var serverTime = new Date(data.utc).getTime();
      assert.approximately(serverTime, now, 20000);
    },
    (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.
*/
```