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Add hook to handle OAuth Access Token Response #174

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1b747b5
Add handler for subclasses to process the response from OAuth2 token
jonstorer May 11, 2023
7892786
wip
jonstorer May 11, 2023
1bd1363
remove console.log
jonstorer May 12, 2023
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39 changes: 32 additions & 7 deletions lib/strategy.js
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Original file line number Diff line number Diff line change
Expand Up @@ -172,9 +172,12 @@ OAuth2Strategy.prototype.authenticate = function(req, options) {
params.code_verifier = ok;
}

self._oauth2.getOAuthAccessToken(code, params,
function(err, accessToken, refreshToken, params) {
if (err) { return self.error(self._createOAuthError('Failed to obtain access token', err)); }
self._oauth2.getOAuthAccessToken(code, params, function(err, _accessToken, _refreshToken, _params) {
if (err) { return self.error(self._createOAuthError('Failed to obtain access token', err)); }

self.handleOAuthAccessTokenResponse(_accessToken, _refreshToken, _params, function (err, accessToken, refreshToken, params) {
if (err) { return self.error(self._createOAuthError('Failed to handle oauth access token response', err)); }

if (!accessToken) { return self.error(new Error('Failed to obtain access token')); }

self._loadUserProfile(accessToken, function(err, profile) {
Expand Down Expand Up @@ -209,8 +212,10 @@ OAuth2Strategy.prototype.authenticate = function(req, options) {
return self.error(ex);
}
});
}
);

});

});
}

var state = (req.query && req.query.state) || (req.body && req.body.state);
Expand Down Expand Up @@ -247,7 +252,7 @@ OAuth2Strategy.prototype.authenticate = function(req, options) {
default:
return this.error(new Error('Unsupported code verifier transformation method: ' + this._pkceMethod));
}

params.code_challenge = challenge;
params.code_challenge_method = this._pkceMethod;
}
Expand All @@ -265,7 +270,7 @@ OAuth2Strategy.prototype.authenticate = function(req, options) {
// the state will be automatically managed and persisted by the
// state store.
params.state = state;

var parsed = url.parse(this._oauth2._authorizeUrl, true);
utils.merge(parsed.query, params);
parsed.query['client_id'] = this._oauth2._clientId;
Expand Down Expand Up @@ -303,6 +308,26 @@ OAuth2Strategy.prototype.authenticate = function(req, options) {
}
};

/**
* Handle OAuthAccessTokenResponse.
*
* OAuth 2.0-based authentication strategies can overrride this function in
* order to format the OAuth Access Token Response
*
* Some auth providers overload the OAuthAccessToken response
* which may require reformatting before continuing with the standard flow
* See https://github.com/nmaves/passport-slack-oauth2/issues/9#issuecomment-1544231819
*
* @param {String:null} accessToken
* @param {String:null} refreshToken
* @param {Object} params
* @param {Function} done
*/

OAuth2Strategy.prototype.handleOAuthAccessTokenResponse = function(accessToken, refreshToken, params, done) {
done(null, accessToken, refreshToken, params);
};

/**
* Retrieve user profile from service provider.
*
Expand Down
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