curriculum/challenges/english/blocks/back-end-development-and-apis-projects/bd7158d8c443edefaeb5bd0e.md
Build a full-stack JavaScript app that is functionally similar to this: <a href="https://url-shortener-microservice.freecodecamp.rocks" target="_blank" rel="noopener noreferrer nofollow">https://url-shortener-microservice.freecodecamp.rocks</a>. Working on this project will involve you writing your code using one of the following methods:
HINT: Do not forget to use a body parsing middleware to handle the POST requests. Also, you can use the function dns.lookup(host, cb) from the dns core module to verify a submitted URL.
You should provide your own project, not the example URL.
assert(
!/.*\/url-shortener-microservice\.freecodecamp\.rocks/.test(
code
)
);
You can POST a URL to /api/shorturl and get a JSON response with original_url and short_url properties. Here's an example: { original_url : 'https://freeCodeCamp.org', short_url : 1}
const url = code;
const urlVariable = Date.now();
const fullUrl = `${url}/?v=${urlVariable}`
const res = await fetch(url + '/api/shorturl', {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `url=${fullUrl}`
});
if (res.ok) {
const { short_url, original_url } = await res.json();
assert.isNotNull(short_url);
assert.strictEqual(original_url, `${url}/?v=${urlVariable}`);
} else {
throw new Error(`${res.status} ${res.statusText}`);
}
When you visit /api/shorturl/<short_url>, you will be redirected to the original URL.
const url = code;
const urlVariable = Date.now();
const fullUrl = `${url}/?v=${urlVariable}`
let shortenedUrlVariable;
const postResponse = await fetch(url + '/api/shorturl', {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `url=${fullUrl}`
});
if (postResponse.ok) {
const { short_url } = await postResponse.json();
shortenedUrlVariable = short_url;
} else {
throw new Error(`${postResponse.status} ${postResponse.statusText}`);
}
const getResponse = await fetch(
url + '/api/shorturl/' + shortenedUrlVariable
);
if (getResponse) {
const { redirected, url } = getResponse;
assert.isTrue(redirected);
assert.strictEqual(url,fullUrl);
} else {
throw new Error(`${getResponse.status} ${getResponse.statusText}`);
}
If you pass an invalid URL that doesn't follow the valid http://www.example.com format, the JSON response will contain { error: 'invalid url' }
const url = code;
const res = await fetch(url + '/api/shorturl', {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `url=ftp:/john-doe.invalidTLD`
});
if (res.ok) {
const { error } = await res.json();
assert.isNotNull(error);
assert.strictEqual(error.toLowerCase(), 'invalid url');
} else {
throw new Error(`${res.status} ${res.statusText}`);
}