How to use Spotify 30sec previews with Expo React native app - react-native

Question

I have been trying to use the Spotify API in my expo app but every tutorial or wrapper I find doesn't seem to work.
I would specifically like to access the 30-second song previews and track/song searching features.
If anyone could provide some guidance or point me towards a working demo of any kind that would be awesome.
Thanks!

Answer 1

Found parts of the solution in https://docs.expo.dev/guides/authentication/#spotify
const discovery = {
authorizationEndpoint: 'https://accounts.spotify.com/authorize',
tokenEndpoint: 'https://accounts.spotify.com/api/token',
};
var client_id = ''; // Your client id
var client_secret = ''; // Your secret
export default function spotifyLogin(props) {
const [request, response, promptAsync] = useAuthRequest(
{
clientId: '',
scopes: ['user-read-email', 'user-read-playback-state', 'playlist-modify-public','playlist-modify-private','playlist-modify-public','playlist-read-private','user-read-recently-played'],
// In order to follow the "Authorization Code Flow" to fetch token after authorizationEndpoint
// this must be set to false
usePKCE: false,
redirectUri: makeRedirectUri({
//scheme: 'your.app'
}),
},
discovery
);
React.useEffect(() => {
if (response?.type === 'success') {
const { code } = response.params;
//save code to local storage
props.saveLogin(code)
}
}, [response]);
return (
<Button
disabled={!request}
title="Login"
onPress={() => {
promptAsync();
}}
/>
);
}
export const getFirstTokenData = async (code) => {
var dataToSend = {
code: code,
redirect_uri: makeRedirectUri(),
grant_type: 'authorization_code'};
//making data to send on server
var formBody = [];
for (var key in dataToSend) {
var encodedKey = encodeURIComponent(key);
var encodedValue = encodeURIComponent(dataToSend[key]);
formBody.push(encodedKey + '=' + encodedValue);
}
formBody = formBody.join('&');
//POST request
var response = await fetch('https://accounts.spotify.com/api/token', {
method: 'POST', //Request Type
body: formBody, //post body
headers: {
//Header Defination
'Authorization': 'Basic ' + (new Buffer(client_id + ':' + client_secret).toString('base64')),
},
})
try{
return await response.json()
}catch (error){
console.log(error)
}
}
export const getRefreshTokenData = async (refreshToken) => {
console.log(refreshToken)
console.log(refreshToken + " going in for refresh")
var dataToSend = {
refresh_token : refreshToken,
grant_type: 'refresh_token'};
//making data to send on server
var formBody = [];
for (var key in dataToSend) {
var encodedKey = encodeURIComponent(key);
var encodedValue = encodeURIComponent(dataToSend[key]);
formBody.push(encodedKey + '=' + encodedValue);
}
formBody = formBody.join('&');
//POST request
var response = await fetch('https://accounts.spotify.com/api/token', {
method: 'POST', //Request Type
body: formBody, //post body
headers: {
//Header Defination
'Authorization': 'Basic ' + (new Buffer(client_id + ':' + client_secret).toString('base64')),
},
})
try{
return await response.json()
}catch (error){
console.log(error)
}
}
The above takes care of auth and getting refresh tokens, below takes care of searching for a track. To get 30 second previews there is a preview property in the return data for getTrack()
const apiPrefix = 'https://api.spotify.com/v1';
export default async ({
offset,
limit,
q,
token,
}) => {
const uri = `${apiPrefix}/search?type=track&limit=${limit}&offset=${offset}&q=${encodeURIComponent(q)}`;
console.log('search begin, uri =', uri, 'token =', token);
const res = await fetch(uri, {
method: 'GET',
headers: {
Authorization: `Bearer ${token}`,
}
});
const json = await res.json();
//console.log('search got json', json);
if (!res.ok) {
return [];
}
return json
// const {
// tracks: {
// items,
// }
// } = json;
// // const items = json.tracks.items;
// return items.map(item => ({
// id: item.id,
// title: item.name,
// imageUri: item.album.images
// ? item.album.images[0].url
// : undefined
// }));
console.log('search end');
};
export const getTrack = async(trackID, token) => {
const uri = `${apiPrefix}/tracks/${trackID}?market=ES`;
const res = await fetch(uri, {
method: 'GET',
headers: {
// Accept: `application/json`,
// Content-Type: `application/json`,
Authorization: `Bearer ${token}`,
}
});
const json = await res.json();
//console.log('search got json', json);
if (!res.ok) {
return [];
}
return json
}

Answer 2

Once upon a time, I worked on a similar application as a test. It's a bit outdated, but I believe Spotify has not changed its API much in the meantime.
Hope this caa help
https://github.com/kubanac95/spotify-test