I'd like to build an application to query the data in my Yahoo! Fantasy league but can't make it past the 3-legged OAuth authentication and was hoping someone could give me a quick demo, or point me to a relevant tutorial.
I'm willing to use NodeJS, Python or PHP.
I've registered an API and gotten a Consumer Key and Consumer Secret.
Their documentation contains two PHP examples (that I couldn't get to work) and references OAuth.net's list of libaries.
But let's take Python. The rauth documentation only lists the first leg, how am I supposed to complete the other 2 legs?
from rauth import OAuth2Service
yahoo = OAuth2Service(
client_id='mykey',
client_secret='mysecret',
name='yahoo',
authorize_url='https://api.login.yahoo.com/oauth/v2/request_auth',
access_token_url='https://api.login.yahoo.com/oauth/v2/get_token',
base_url='https://api.login.yahoo.com/oauth/v2/')
url = yahoo.get_authorize_url()
Almost all of the examples I found on GitHub.com are years old and have compatibility problems, although yahoofantasysandbox seemed almost there.
This tutorial recommens using fantasy-sports but I didn't see a lot of details on implementation or examples.
Can someone either point me in the right direction on this or give me a demo of working code?
One year later I've managed to do this myself.
TL;DR: If you want to access the Yahoo Fantasy API just use this NodeJS tool I've created: https://github.com/edwarddistel/yahoo-fantasy-baseball-reader
If you want to create your own app in NodeJS or PHP however, here's how:
Go to https://developer.yahoo.com/apps/create/, get a Consumer Key and Consumer Secret
Put the Consumer Key into https://api.login.yahoo.com/oauth2/request_auth?client_id=YOUR-CONSUMER-KEY-GOES-HERE&redirect_uri=oob&response_type=code&language=en-us and Agree to allow access, then grab the authorization code
Construct the Auth header, a Base64 encoding of CONSUMER_KEY:CONSUMER_SECRET:
const AUTH_HEADER = Buffer.from(`${CONSUMER_KEY}:${CONSUMER_SECRET}`, `binary`).toString(`base64`);
Yahoo requires x-www-form-urlencoded, so if using an HTTP request library like Axios you'll need to stringify the data as per the docs
Make a request to Yahoo. Here's an example:
function getInitialAuthorization () {
return axios({
url: `https://api.login.yahoo.com/oauth2/get_token`,
method: 'post',
headers: {
'Authorization': `Basic ${AUTH_HEADER}`,
'Content-Type': 'application/x-www-form-urlencoded',
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36',
},
data: qs.stringify({
client_id: CONSUMER_KEY,
client_secret: CONSUMER_SECRET,
redirect_uri: 'oob',
code: YAHOO_AUTH_CODE,
grant_type: 'authorization_code'
}),
timeout: 1000,
}).catch((err) => {
console.error(`Error in getInitialAuthorization(): ${err}`);
});
}
Take that response and write it to a file. You'll need those credentials to re-authorize the app every 60 minutes of usage.
Make normal HTTP requests to the Yahoo API. Check the response, if the authorization token has expired, re-authorize using a slightly different set of parameters:
function refreshAuthorizationToken (token) {
return axios({
url: `https://api.login.yahoo.com/oauth2/get_token`,
method: 'post',
headers: {
'Authorization': `Basic ${AUTH_HEADER}`,
'Content-Type': 'application/x-www-form-urlencoded',
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36',
},
data: qs.stringify({
redirect_uri: 'oob',
grant_type: 'refresh_token',
refresh_token: token
}),
timeout: 10000,
}).catch((err) => {
console.error(`Error in refreshAuthorizationToken(): ${err}`);
});
}
// Hit the Yahoo Fantasy API
async function makeAPIrequest (url) {
let response;
try {
response = await axios({
url: url,
method: 'get',
headers: {
'Authorization': `Bearer ${CREDENTIALS.access_token}`,
'Content-Type': 'application/x-www-form-urlencoded',
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36',
},
timeout: 10000,
});
const jsonData = JSON.parse(parser.toJson(response.data));
return jsonData;
} catch (err) {
if (err.response.data && err.response.data.error && err.response.data.error.description && err.response.data.error.description.includes("token_expired")) {
const newToken = await refreshAuthorizationToken(CREDENTIALS.refresh_token);
if (newToken && newToken.data && newToken.data.access_token) {
CREDENTIALS = newToken.data;
// Just a wrapper for fs.writeFile
writeToFile(JSON.stringify(newToken.data), AUTH_FILE, 'w');
return makeAPIrequest(url, newToken.data.access_token, newToken.data.refresh_token);
}
} else {
console.error(`Error with credentials in makeAPIrequest()/refreshAuthorizationToken(): ${err}`);
process.exit();
}
}
}
Here is an example in PHP:
function getInitialAuthorizationToken() {
$ch = curl_init();
$post_values = [
"client_id" => $GLOBALS['consumer_key'],
"client_secret" => $GLOBALS['consumer_secret'],
"redirect_uri" => "oob",
"code" => $GLOBALS['initial_auth_code'],
"grant_type" => "authorization_code"
];
curl_setopt_array($ch, array(
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_URL => $GLOBALS['auth_endpoint'],
CURLOPT_POST => 1,
CURLOPT_HTTPHEADER => array(
'Authorization: Basic ' . $GLOBALS['auth_header'],
'Content-Type: application/x-www-form-urlencoded',
'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36'),
CURLOPT_POSTFIELDS => http_build_query($post_values)
));
$answer = curl_exec($ch);
if (isset($answer)) writeToFile($answer);
if (!isset($access_token)) {
echo "Error!";
die;
}
else {
return $token;
}
}
Hope this helps others.