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// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package ui // import "miniflux.app/v2/internal/ui"
import (
"crypto/subtle"
"errors"
"net/http"
"miniflux.app/v2/internal/config"
"miniflux.app/v2/internal/http/cookie"
"miniflux.app/v2/internal/http/request"
"miniflux.app/v2/internal/http/response/html"
"miniflux.app/v2/internal/http/route"
"miniflux.app/v2/internal/locale"
"miniflux.app/v2/internal/logger"
"miniflux.app/v2/internal/model"
"miniflux.app/v2/internal/ui/session"
)
func (h *handler) oauth2Callback(w http.ResponseWriter, r *http.Request) {
clientIP := request.ClientIP(r)
printer := locale.NewPrinter(request.UserLanguage(r))
sess := session.New(h.store, request.SessionID(r))
provider := request.RouteStringParam(r, "provider")
if provider == "" {
logger.Error("[OAuth2] Invalid or missing provider")
html.Redirect(w, r, route.Path(h.router, "login"))
return
}
code := request.QueryStringParam(r, "code", "")
if code == "" {
logger.Error("[OAuth2] No code received on callback")
html.Redirect(w, r, route.Path(h.router, "login"))
return
}
state := request.QueryStringParam(r, "state", "")
if subtle.ConstantTimeCompare([]byte(state), []byte(request.OAuth2State(r))) == 0 {
logger.Error(`[OAuth2] Invalid state value: got "%s" instead of "%s"`, state, request.OAuth2State(r))
html.Redirect(w, r, route.Path(h.router, "login"))
return
}
authProvider, err := getOAuth2Manager(r.Context()).FindProvider(provider)
if err != nil {
logger.Error("[OAuth2] %v", err)
html.Redirect(w, r, route.Path(h.router, "login"))
return
}
profile, err := authProvider.GetProfile(r.Context(), code, request.OAuth2CodeVerifier(r))
if err != nil {
logger.Error("[OAuth2] %v", err)
html.Redirect(w, r, route.Path(h.router, "login"))
return
}
logger.Info("[OAuth2] [ClientIP=%s] Successful auth for %s", clientIP, profile)
if request.IsAuthenticated(r) {
loggedUser, err := h.store.UserByID(request.UserID(r))
if err != nil {
html.ServerError(w, r, err)
return
}
if h.store.AnotherUserWithFieldExists(loggedUser.ID, profile.Key, profile.ID) {
logger.Error("[OAuth2] User #%d cannot be associated because it is already associated with another user", loggedUser.ID)
sess.NewFlashErrorMessage(printer.Printf("error.duplicate_linked_account"))
html.Redirect(w, r, route.Path(h.router, "settings"))
return
}
authProvider.PopulateUserWithProfileID(loggedUser, profile)
if err := h.store.UpdateUser(loggedUser); err != nil {
html.ServerError(w, r, err)
return
}
sess.NewFlashMessage(printer.Printf("alert.account_linked"))
html.Redirect(w, r, route.Path(h.router, "settings"))
return
}
user, err := h.store.UserByField(profile.Key, profile.ID)
if err != nil {
html.ServerError(w, r, err)
return
}
if user == nil {
if !config.Opts.IsOAuth2UserCreationAllowed() {
html.Forbidden(w, r)
return
}
if h.store.UserExists(profile.Username) {
html.BadRequest(w, r, errors.New(printer.Printf("error.user_already_exists")))
return
}
userCreationRequest := &model.UserCreationRequest{Username: profile.Username}
authProvider.PopulateUserCreationWithProfileID(userCreationRequest, profile)
user, err = h.store.CreateUser(userCreationRequest)
if err != nil {
html.ServerError(w, r, err)
return
}
}
sessionToken, _, err := h.store.CreateUserSessionFromUsername(user.Username, r.UserAgent(), clientIP)
if err != nil {
html.ServerError(w, r, err)
return
}
logger.Info("[OAuth2] [ClientIP=%s] username=%s (%s) just logged in", clientIP, user.Username, profile)
h.store.SetLastLogin(user.ID)
sess.SetLanguage(user.Language)
sess.SetTheme(user.Theme)
http.SetCookie(w, cookie.New(
cookie.CookieUserSessionID,
sessionToken,
config.Opts.HTTPS,
config.Opts.BasePath(),
))
html.Redirect(w, r, route.Path(h.router, "unread"))
}
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