Fix overwrite of existing cookiejar.

auth.go

@@ -122,18 +122,31 @@ func (kf *KF) TwoFactorAuth(ctx context.Context, resp *http.Response, code uint3
 	return kf.Do(req)
 }
 
-func (kf *KF) RefreshSession(ctx context.Context) error {
+func (kf *KF) IsLoggedIn() bool {
+	return getCookie(kf.client.Jar, kf.domain, "xf_user") != nil
+}
+
+func (kf *KF) RefreshSession(ctx context.Context) (string, error) {
+	const COOKIE_NAME = "xf_session"
+
+	jar := kf.client.Jar
+
 	// Clear any existing session token to request a new one.
-	setCookie(kf.domain, kf.client.Jar, &http.Cookie{
-		Name:  "xf_session",
+	setCookie(jar, kf.domain, &http.Cookie{
+		Name:  COOKIE_NAME,
 		Value: "",
 	})
 
 	resp, err := kf.Get(ctx, kf.domain)
 	if err != nil {
-		return err
+		return "", err
 	}
 	resp.Body.Close()
 
-	return nil
+	session := getCookie(jar, kf.domain, COOKIE_NAME)
+	if session == nil {
+		return "", errors.New("Failed to get new xf_session cookie.")
+	}
+
+	return session.Value, nil
 }

auth_test.go

@@ -63,6 +63,13 @@ func TestLogin(t *testing.T) {
 		}
 		t.Logf("2FA response: %+v\n", lr)
 	}
+
+	session, err := kf.RefreshSession(ctx)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	t.Logf("xf_session: %s\n", session)
 }
 
 func genTest2FACode() (uint32, error) {

go.mod

@@ -1,6 +1,6 @@
 module gitgud.io/yats/libkiwi
 
-go 1.26.1
+go 1.26.4
 
 require (
 	gitgud.io/yats/cerberus v0.0.0-20260214165307-66e6f74a4be9

http.go

@@ -14,25 +14,18 @@ import (
 	"golang.org/x/net/html/atom"
 )
 
-// Get XFToken (data-csrf) from page html.
-func XFToken(page io.Reader) (string, error) {
-	z := html.NewTokenizer(page)
-	for i := z.Next(); i != html.ErrorToken; i = z.Next() {
-		tk := z.Token()
-		if tk.DataAtom == atom.Html {
-			for _, a := range tk.Attr {
-				switch a.Key {
-				case "data-csrf":
-					return a.Val, nil
-				}
-			}
+func getCookie(jar http.CookieJar, u *url.URL, name string) *http.Cookie {
+	cookies := jar.Cookies(u)
+	for _, c := range cookies {
+		if c.Name == name {
+			return c
 		}
 	}
 
-	return "", ErrNoXFToken
+	return nil
 }
 
-func setCookie(u *url.URL, jar http.CookieJar, newCookie *http.Cookie) {
+func setCookie(jar http.CookieJar, u *url.URL, newCookie *http.Cookie) {
 	cookies := jar.Cookies(u)
 
 	for i, c := range cookies {
@@ -48,6 +41,26 @@ func setCookie(u *url.URL, jar http.CookieJar, newCookie *http.Cookie) {
 	jar.SetCookies(u, cookies)
 }
 
+// Get XFToken (data-csrf) from page html.
+func XFToken(page io.Reader) (string, error) {
+	z := html.NewTokenizer(page)
+	for i := z.Next(); i != html.ErrorToken; i = z.Next() {
+		tk := z.Token()
+		if tk.DataAtom != atom.Html {
+			continue
+		}
+
+		for _, a := range tk.Attr {
+			switch a.Key {
+			case "data-csrf":
+				return a.Val, nil
+			}
+		}
+	}
+
+	return "", ErrNoXFToken
+}
+
 func (kf *KF) Do(req *http.Request) (*http.Response, error) {
 	var (
 		ctx = req.Context()

libkiwi.go

@@ -21,25 +21,25 @@ type KF struct {
 }
 
 // Supply your own http.Client to route through any proxies.
-func NewKF(hc http.Client, host *url.URL) (*KF, error) {
+func NewKF(hc http.Client, host *url.URL) (KF, error) {
 	u, err := url.Parse(fmt.Sprintf("https://%s", host.Hostname()))
 	if err != nil {
-		return nil, err
+		return KF{}, err
 	}
 
-	jar, err := cookiejar.New(nil)
-	if err != nil {
-		return nil, err
+	if hc.Jar == nil {
+		jar, err := cookiejar.New(nil)
+		if err != nil {
+			return KF{}, err
+		}
+
+		hc.Jar = jar
 	}
 
-	hc.Jar = jar
-
-	kf := &KF{
+	return KF{
 		client: hc,
 		domain: u,
-	}
-
-	return kf, nil
+	}, nil
 }
 
 type User struct {