Some Session methods don't work with http client created by golang.org/x/oauth2

[VojtechVitek]

How can I use this pkg with golang.org/x/oauth2 properly?

package main

import (
    "golang.org/x/oauth2"
    oauth2fb "golang.org/x/oauth2/facebook"

    "github.com/huandu/facebook"
)

func main() {

    conf := &oauth2.Config{
        ClientID:     "AppId",
        ClientSecret: "AppSecret",
        RedirectURL:  "CallbackURL",
        Scopes:       []string{"user_location"},
        Endpoint:     oauth2fb.Endpoint,
    }

    token, err := conf.Exchange(oauth2.NoContext, "code")

    client := conf.Client(oauth2.NoContext, tok)

    // Now, I want to pass the above client
    // (that already provides the AccessTokens)
    // into the facebook Session.
    // 
    // ... I tried:

    api := &facebook.Session{
        HttpClient: client,
        Version: "2.2",
    }

    err := api.Validate()  // <= returns "access token is not set" error
}

The question is... how do I create new Session with my own HttpClient and without any AccessToken (as my client's Transport already handles that)?

[VojtechVitek]

I ended up with this:

app := facebook.New("AppId", "AppSecret")
api := app.Session("token")
api.Version = "v2.2"
api.HttpClient = client  // Client coming from golang.org/x/oauth2.

The only thing I'm not satisfied with is that this pkg forces me to provide AppId, AppSecret and Token. Which is what golang.org/x/oauth2 client already handles for me.

Any suggestions? :)

[huandu]

You can use Session#SetAccessToken to set access token without having to create an App.

[VojtechVitek]

Here's what I'm saying:
I don't want to set AccessToken at all, as the golang.org/x/oauth2 client's Transport already handles that for me :)

So, is it possible to use the API directly without setting AppId, AppSecret and AccessToken? Seems like most of the methods fail on checks like

facebook/session.go

Lines 229 to 232 in ff27e4b

	if session.accessToken == "" {
	err = fmt.Errorf("access token is not set.")
	return
	}

.

Thanks for your feedback:)

[VojtechVitek]

I guess I could use session.Get("/me", Params{"fields": "id"}) directly, I will give it a shot.

[VojtechVitek]

Given

    api := &facebook.Session{
        Version:    "v2.4",
        HttpClient: client,
    }

I can't use the following methods, as they return errors because of missing Session ID / AccessToken:

    err := api.Validate()

    id, err := api.User()

But the following works :-)

    res, err := api.Get("/me/accounts", getFbParams(url.Values{}))

[huandu]

OK. I get your point. I think it's reasonable to by-pass some access token checks when Session#HttpClient is set.

[VojtechVitek]

Yea, that'd do it. Thanks!

[huandu]

Please try latest code and let me know whether it works for you now.

[VojtechVitek]

That was fast, wow.. And it works now!

@huandu Thank you very much for such a fast resolution and for this project in general. Cheers.