Add custom headers option to CLI

When used as a library, OASGraph allows to define custom headers to be sent in every HTTP request to the wrapped REST(-like) API, as described in the [options]{https://github.com/strongloop/oasgraph/tree/master/packages/oasgraph#options}.

However, this feature is not available when using OASGraph via CLI. A new headers option should allow users to define custom headers to send, for example, authentication tokens. This was also brought up in issue #88.

[gtamas]

@Alan-Cha I think it’s common, yes. For example this is how cURL works and several command-line parser libs support this as well (e.g: yargs, commander, optimist etc ). Also, specifying the header’s value in this format is quite common.

By the way, you could add support for defining query string parameters the same way. Like --qs foo:1 --qs bar: 2

Viewers: ok thx. Unfortunately that’s not gonna work in my case. I need to send custom things like sessionToken, username etc. Anyway,I already solved this. I used OtG as a lib instead of CLI.

[Alan-Cha]

@gtamas Thank you so much for the insight! I will look into adding this feature then. Glad to hear that you were still able to solve your authentication problem!