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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| // Package api contains the authentication endpoints. | ||
| package api | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "errors" | ||
| "net/http" | ||
|
|
||
| "log/slog" | ||
|
|
||
| "github.com/go-chi/chi/v5" | ||
| "github.com/perebaj/contractus" | ||
| "golang.org/x/oauth2" | ||
| ) | ||
|
|
||
| // Auth endpoints | ||
|
|
||
| // TODO(JOJO): randomize this | ||
| var randState = "random" | ||
|
|
||
| // RegisterAuthHandler register the auth endpoints. | ||
| func RegisterAuthHandler(r chi.Router, a Auth) { | ||
| const ( | ||
| loginURL = "/" | ||
| callbackURL = "/callback" | ||
| tokenURL = "/token" | ||
| ) | ||
| r.Method(http.MethodGet, loginURL, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| login(w, r, a) | ||
| })) | ||
| r.Method(http.MethodGet, callbackURL, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| callback(w, r, a) | ||
| })) | ||
| r.Method(http.MethodGet, tokenURL, http.HandlerFunc(token)) | ||
| } | ||
|
|
||
| func login(w http.ResponseWriter, r *http.Request, a Auth) { | ||
| var url string | ||
| if a.AccessType == "online" { | ||
| url = a.GoogleOAuthConfig.AuthCodeURL(randState, oauth2.AccessTypeOnline) | ||
| } else { | ||
| url = a.GoogleOAuthConfig.AuthCodeURL(randState, oauth2.AccessTypeOffline) | ||
| } | ||
|
|
||
| http.Redirect(w, r, url, http.StatusFound) | ||
| slog.Info("login request received") | ||
| } | ||
|
|
||
| func callback(w http.ResponseWriter, r *http.Request, a Auth) { | ||
| state := r.FormValue("state") | ||
| if state == "" { | ||
| sendErr(w, http.StatusBadRequest, errors.New("missing state")) | ||
| return | ||
| } | ||
| if state != randState { | ||
| sendErr(w, http.StatusBadRequest, errors.New("invalid state")) | ||
| return | ||
| } | ||
|
|
||
| code := r.FormValue("code") | ||
| if code == "" { | ||
| sendErr(w, http.StatusBadRequest, errors.New("missing code")) | ||
| return | ||
| } | ||
|
|
||
| ctx := r.Context() | ||
| token, err := a.GoogleOAuthConfig.Exchange(ctx, code) | ||
| if err != nil { | ||
| sendErr(w, http.StatusInternalServerError, err) | ||
| return | ||
| } | ||
|
|
||
| client := a.GoogleOAuthConfig.Client(ctx, token) | ||
| resp, err := client.Get("https://www.googleapis.com/oauth2/v2/userinfo") | ||
| if err != nil { | ||
| sendErr(w, http.StatusInternalServerError, err) | ||
| return | ||
| } | ||
| defer func() { | ||
| _ = resp.Body.Close() | ||
| }() | ||
|
|
||
| d := json.NewDecoder(resp.Body) | ||
|
|
||
| var usr contractus.GoogleUser | ||
| err = d.Decode(&usr) | ||
| if err != nil { | ||
| sendErr(w, http.StatusInternalServerError, err) | ||
| return | ||
| } | ||
|
|
||
| tokenString, err := a.GenerateToken(usr.Email) | ||
| if err != nil { | ||
| sendErr(w, http.StatusInternalServerError, err) | ||
| return | ||
| } | ||
|
|
||
| cookie := http.Cookie{ | ||
| Name: "jwt", | ||
| Value: tokenString, | ||
| MaxAge: 60 * 60 * 24 * 7, // 1 week | ||
| Domain: a.Domain, | ||
| } | ||
| http.SetCookie(w, &cookie) | ||
| http.Redirect(w, r, a.Domain+"/docs", http.StatusSeeOther) | ||
| } | ||
|
|
||
| func token(w http.ResponseWriter, r *http.Request) { | ||
| jwt, err := r.Cookie("jwt") | ||
| if err != nil { | ||
| sendErr(w, http.StatusUnauthorized, Error{"login_again", "try to log in again"}) | ||
| return | ||
| } | ||
|
|
||
| send(w, http.StatusOK, struct { | ||
| Token string `json:"token"` | ||
| }{jwt.Value}) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "net/http" | ||
| "net/http/httptest" | ||
| "testing" | ||
|
|
||
| "github.com/go-chi/chi/v5" | ||
| "golang.org/x/oauth2" | ||
| "golang.org/x/oauth2/google" | ||
| ) | ||
|
|
||
| func TestToken(t *testing.T) { | ||
| r := chi.NewRouter() | ||
| RegisterAuthHandler(r, Auth{}) | ||
|
|
||
| wantToken := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyX2lkIjoxMjN9.PZLMJBT9OIVG2qgp9hQr685oVYFgRgWpcSPmNcw6y7M" | ||
| req := httptest.NewRequest(http.MethodGet, "/token", nil) | ||
| req.AddCookie(&http.Cookie{ | ||
| Name: "jwt", | ||
| Value: wantToken, | ||
| }) | ||
|
|
||
| resp := httptest.NewRecorder() | ||
| r.ServeHTTP(resp, req) | ||
|
|
||
| var response struct { | ||
| Token string `json:"token"` | ||
| } | ||
|
|
||
| if err := json.NewDecoder(resp.Body).Decode(&response); err != nil { | ||
| t.Fatalf("failed to decode response body: %v", err) | ||
| } | ||
| assert(t, resp.Code, http.StatusOK) | ||
| assert(t, response.Token, wantToken) | ||
| } | ||
|
|
||
| func TestToken_Unauthorized(t *testing.T) { | ||
| r := chi.NewRouter() | ||
| RegisterAuthHandler(r, Auth{}) | ||
|
|
||
| req := httptest.NewRequest(http.MethodGet, "/token", nil) | ||
|
|
||
| resp := httptest.NewRecorder() | ||
| r.ServeHTTP(resp, req) | ||
|
|
||
| assert(t, resp.Code, http.StatusUnauthorized) | ||
| } | ||
|
|
||
| func TestLogin(t *testing.T) { | ||
| a := Auth{ | ||
| GoogleOAuthConfig: &oauth2.Config{ | ||
| ClientID: "client_id", | ||
| ClientSecret: "client_secret", | ||
| Endpoint: google.Endpoint, | ||
| RedirectURL: "http://localhost:8080/callback", | ||
| Scopes: []string{"https://www.googleapis.com/auth/userinfo.email"}, | ||
| }, | ||
| } | ||
|
|
||
| r := chi.NewRouter() | ||
| RegisterAuthHandler(r, a) | ||
|
|
||
| req := httptest.NewRequest(http.MethodGet, "/", nil) | ||
|
|
||
| resp := httptest.NewRecorder() | ||
| r.ServeHTTP(resp, req) | ||
|
|
||
| assert(t, resp.Code, http.StatusFound) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "github.com/go-chi/jwtauth/v5" | ||
| "github.com/golang-jwt/jwt" | ||
| "golang.org/x/oauth2" | ||
| ) | ||
|
|
||
| // Auth have the configuration for Auth endpoints. | ||
| type Auth struct { | ||
| // Google OAuth2 | ||
| ClientID string | ||
| ClientSecret string | ||
| RedirectURL string | ||
|
|
||
| // Default domain | ||
| Domain string | ||
| // JWT secret key | ||
| JWTSecretKey string | ||
| // Google OAuth2 config struct | ||
| GoogleOAuthConfig *oauth2.Config | ||
| // Access type | ||
| AccessType string // offline(for local) or online(for production) | ||
| } | ||
|
|
||
| // GenerateToken generates a JWT token for the given email. | ||
| func (a *Auth) GenerateToken(email string) (string, error) { | ||
| claims := jwt.MapClaims{ | ||
| "email": email, | ||
| } | ||
| token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims) | ||
| return token.SignedString([]byte(a.JWTSecretKey)) | ||
| } | ||
|
|
||
| // JWTAuth returns a validated JWT token. | ||
| func (a *Auth) JWTAuth() *jwtauth.JWTAuth { | ||
| tokenAuth := jwtauth.New("HS256", []byte(a.JWTSecretKey), nil) | ||
| return tokenAuth | ||
| } |
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