NodeJS Patreon API account link - node.js

Question

I'm trying to connect user accounts on my website to patreon. I keep getting an access_denied error message in response to step 3. I'm following this documentation.
My node server code looks like this:
socket.on("patreon_register",function(code,user){
var reqString = "api.patreon.com/oauth2/token?code="
+code
+"&grant_type=authorization_code&client_id="
+settings.patreon.Client_ID
+"&client_secret="
+settings.patreon.Client_Secret
+"&redirect_uri="
+"http%3A%2F%2Fwww.levisinger.com%2F%3Fpage%3Dpatreon_success",
req = querystring.stringify({
"code": code,
"grant_type": "authorization_code",
"client_id": settings.patreon.Client_ID,
"client_secret": settings.patreon.Client_Secret,
"redirect_uri": "http%3A%2F%2Fwww.levisinger.com%2F%3Fpage%3Dpatreon_success"
}),
post_options = {
host: 'api.patreon.com',
port: '80',
path: '/oauth2/token',
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': Buffer.byteLength(req)
}
};
// Set up the request
console.log(req);
var post_req = http.request(post_options, function(res) {
res.setEncoding('utf8');
res.on('data', function (chunk) {
console.log(chunk);
if(
chunk.access_token &&
chunk.refresh_token &&
chunk.expires_in &&
chunk.scope &&
chunk.token_type
){
Auth.linkPatreon(user,chunk,function(err,res){
if(err){ socket.emit('patreon_register',false,res); }
else { socket.emit('patreon_register',true,res); }
});
}
});
});
// post the data
post_req.write(req);
post_req.end();
});
The req variable that's actually sent to the server looks like this (changed my codes to generic values of course)
code=MY_RESPONSE_CODE&grant_type=authorization_code&client_id=MY_CLIENT_ID&client_secret=MY_CLIENT_SECRET&redirect_uri=MY_RESPONSE_URI
Any ideas?

Answer 1

In the end, my server looks like this and is working:
socket.on("patreon_register",function(code,user){
var req = querystring.stringify({
code: code,
grant_type: "authorization_code",
client_id: settings.patreon.Client_ID,
client_secret: settings.patreon.Client_Secret,
redirect_uri: settings.patreon.redirect_uri
}),
post_options = {
host: 'api.patreon.com',
port: '80',
path: '/oauth2/token',
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': Buffer.byteLength(req)
}
};
// Set up the request
console.log(req);
var post_req = http.request(post_options, function(res) {
res.setEncoding('utf8');
res.on('data', function (chunk) {
chunk = JSON.parse(chunk);
console.log(chunk);
if(!chunk["error"]){
console.log("Linking!");
Auth.linkPatreon(user,chunk,function(err,res){
if(err){ socket.emit('patreon_register',false,res); }
else { socket.emit('patreon_register',true,res); }
console.log("Linked!");
});
}
});
});