在golang中存储Oauth2凭据

Question

I am trying to figure out how I can storing OAuth2 credentials in golang?

Currently I do this in Python:

from oauth2client.file import Storage ... storage = Storage('settings.dat')

Is there anything similar in go? Does anyone have an example? Thanks!

Answer 1

I think you want a CacheFile which you pass as the TokenCache. Here is some code ripped from a project which uses google drive with oauth2 which should hopefully get you started!

import "code.google.com/p/goauth2/oauth"

// Ask the user for a new auth
func MakeNewToken(t *oauth.Transport) error {
    if *driveAuthCode == "" {
        // Generate a URL to visit for authorization.
        authUrl := t.Config.AuthCodeURL("state")
        fmt.Fprintf(os.Stderr, "Go to the following link in your browser
")
        fmt.Fprintf(os.Stderr, "%s
", authUrl)
        fmt.Fprintf(os.Stderr, "Log in, then re-run this program with the -drive-auth-code parameter
")
        fmt.Fprintf(os.Stderr, "You only need this parameter once until the drive token file has been created
")
        return errors.New("Re-run with --drive-auth-code")
    }

    // Read the code, and exchange it for a token.
    //fmt.Printf("Enter verification code: ")
    //var code string
    //fmt.Scanln(&code)
    _, err := t.Exchange(*driveAuthCode)
    return err
}

func main() {
    // Settings for authorization.
    var driveConfig = &oauth.Config{
        ClientId:     *driveClientId,
        ClientSecret: *driveClientSecret,
        Scope:        "https://www.googleapis.com/auth/drive",
        RedirectURL:  "urn:ietf:wg:oauth:2.0:oob",
        AuthURL:      "https://accounts.google.com/o/oauth2/auth",
        TokenURL:     "https://accounts.google.com/o/oauth2/token",
        TokenCache:   oauth.CacheFile(*driveTokenFile),
    }

    t := &oauth.Transport{
        Config:    driveConfig,
        Transport: http.DefaultTransport,
    }

    // Try to pull the token from the cache; if this fails, we need to get one.
    token, err := driveConfig.TokenCache.Token()
    if err != nil {
        err := MakeNewToken(t)
        if err != nil {
            return nil, fmt.Errorf("Failed to authorise: %s", err)
        }
     }
}