Added port

[Revadike]

Port 80 is often used by other (essential) processes, making the current form of the library unusable for some people. This PR will make it configurable.

[Revadike]

(In case you were wondering, I picked port 32019, because it is the start month of this project ;) )

[levz0r]

Review

Good feature - port 80 requires root privileges on Unix and blocks many users. Changing default to 32019 is a sensible choice.

Bugs Found 🐛

1. Assignment instead of argument passing (3 occurrences)

// gmail-tester.js:192 - BUG
return await _get_recent_email(credentials, token, options, port = 32019);
//                                                         ^^^^^^^^^^^^
// Should be just: port

// gmail-tester.js:209 - BUG  
const oAuth2Client = await gmail.authorize(credentials, token, port = 32019);
// Should be just: port

// gmail.js:31 - BUG
const newOAuth2Client = await get_new_token(oAuth2Client, token, port = 32019);
// Should be just: port

These are assignments (port = 32019), not parameter passing. This always passes 32019 regardless of what port value was passed in, breaking the feature.

2. Inconsistent defaults

• oauth2.js defaults to port = 80
• All other files default to port = 32019

Should be consistent (32019 everywhere).

Suggested Fix

// gmail-tester.js:192
- return await _get_recent_email(credentials, token, options, port = 32019);
+ return await _get_recent_email(credentials, token, options, port);

// gmail-tester.js:209
- const oAuth2Client = await gmail.authorize(credentials, token, port = 32019);
+ const oAuth2Client = await gmail.authorize(credentials, token, port);

// gmail.js:31
- const newOAuth2Client = await get_new_token(oAuth2Client, token, port = 32019);
+ const newOAuth2Client = await get_new_token(oAuth2Client, token, port);

// libs/oauth2.js:35
- async function authenticate(oauth2Client, scopes, tokensFile, port = 80) {
+ async function authenticate(oauth2Client, scopes, tokensFile, port = 32019) {

Once these are fixed, this PR is good to merge! 👍

[levz0r]

Thank you for the contribution! This PR has been superseded by #149 which includes your changes along with bug fixes, tests, and documentation updates.