Package gclientauth handles settings up a oAuth2 client and access token to talk to Google APIs from cli applications. The client libraries/APIs themselves don't handle authentication so it is necessary to first get the access token that is used to setup the API client to the APIs which this package handles.

It wraps around golang.org/x/oauth2/google to provide some user friendly behavior and removes some boiler plate code for developers.

The code is a mixture of various public Google tutorials and examples such as http://developers.google.com/youtube/v3/quickstart/go.

In order to use this package:

1. Create a new project on the Google API Console (https://console.developers.google.com/).
2. In the new project, enable the Google APIs to access.
3. Setup up the credentials and download the client secret JSON configuration from https://console.developers.google.com/apis/credentials

TIP:

If it is desktop/other credential is chosen then gclientauth will show the user an URL to visit in order toget a code that can be used to get an access token..

If it is a web application then gclientauth will attempt to run a local webserver to get the code itself and create a token so the user don't have to do anything themselves. Make sure you set the redirect url to match what you pass to the library (e.g. localhost:8080).

Example Usage:

package main

func main() {
    scopes := []string{youtube.YoutubeReadonlyScope}
    ctx := oauth2.NoContext
    token, config, err := gclientauth.GetGoogleOauth2Token(ctx, "client_secret.json", "accesstoken.json", scopes, false, "8080")
    ...
    cfg := config.Client(ctx, token)
    ...
    gp, err := googlephotos.New(cfg)
    ...
    res, err := gp.Albums.List().Do()
    for _, a := range res.Albums {
        fmt.Printf("%v\n", a.Title)
    }
}