Create arbitrary POST request

As the salesforce api continues to expand, it might be useful to create a way for nforce to make an arbitrary POST request while waiting for specific features to be supported.

Use Case: POST to generic streaming API channel.

This requires making an HTTP POST request to

/services/data/v36.0/sobjects/StreamingChannel/{channelId}/push

(where {channelId} is the salesforce ID for the generic channel).

I was able to get this to work, but I ended up using the should-be-private _apiRequest method. I would much rather have a way to make a POST pre-packaged in the same way that getUrl is made available for arbitrary HTTP GET requests.

I am crazy busy for the next month. If I can get back to this later, I might have a stab and make a PR. But if I post this here, maybe someone else will have a go first.

Thanks! Great lib, by the way!

[kevinohara80]

I also added more low-level REST methods in v1.10.

[jkentjnr]

@afawcett I created https://github.com/jkentjnr/nforce-actions and have only added support to date for flows:

const org = nforce.createConnection({
  clientId: '<client_id>',
  clientSecret: '<client_secret>',
  redirectUri: '<redirect_uri>',
  username: process.env.SFUSER,
  password: process.env.SFPASS,
  plugins: ['customActions'] // loads the plugin in this connection
});

org.customActions.runFlow({ flow: { name: 'Test_Flow', params: { } }, oauth }, (err, response) => {
    console.log('RESP', err, response);
});