1 files changed, 76 insertions, 0 deletions
diff --git a/internal/api/client/auth/middleware.go b/internal/api/client/auth/middleware.go
new file mode 100644
index 000000000..c42ba77fc
--- /dev/null
+++ b/internal/api/client/auth/middleware.go
@@ -0,0 +1,76 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package auth
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// OauthTokenMiddleware checks if the client has presented a valid oauth Bearer token.
+// If so, it will check the User that the token belongs to, and set that in the context of
+// the request. Then, it will look up the account for that user, and set that in the request too.
+// If user or account can't be found, then the handler won't *fail*, in case the server wants to allow
+// public requests that don't have a Bearer token set (eg., for public instance information and so on).
+func (m *Module) OauthTokenMiddleware(c *gin.Context) {
+	l := m.log.WithField("func", "OauthTokenMiddleware")
+	l.Trace("entering OauthTokenMiddleware")
+
+	ti, err := m.server.ValidationBearerToken(c.Request)
+	if err != nil {
+		l.Trace("no valid token presented: continuing with unauthenticated request")
+		return
+	}
+	c.Set(oauth.SessionAuthorizedToken, ti)
+	l.Tracef("set gin context %s to %+v", oauth.SessionAuthorizedToken, ti)
+
+	// check for user-level token
+	if uid := ti.GetUserID(); uid != "" {
+		l.Tracef("authenticated user %s with bearer token, scope is %s", uid, ti.GetScope())
+
+		// fetch user's and account for this user id
+		user := &gtsmodel.User{}
+		if err := m.db.GetByID(uid, user); err != nil || user == nil {
+			l.Warnf("no user found for validated uid %s", uid)
+			return
+		}
+		c.Set(oauth.SessionAuthorizedUser, user)
+		l.Tracef("set gin context %s to %+v", oauth.SessionAuthorizedUser, user)
+
+		acct := &gtsmodel.Account{}
+		if err := m.db.GetByID(user.AccountID, acct); err != nil || acct == nil {
+			l.Warnf("no account found for validated user %s", uid)
+			return
+		}
+		c.Set(oauth.SessionAuthorizedAccount, acct)
+		l.Tracef("set gin context %s to %+v", oauth.SessionAuthorizedAccount, acct)
+	}
+
+	// check for application token
+	if cid := ti.GetClientID(); cid != "" {
+		l.Tracef("authenticated client %s with bearer token, scope is %s", cid, ti.GetScope())
+		app := &gtsmodel.Application{}
+		if err := m.db.GetWhere("client_id", cid, app); err != nil {
+			l.Tracef("no app found for client %s", cid)
+		}
+		c.Set(oauth.SessionAuthorizedApplication, app)
+		l.Tracef("set gin context %s to %+v", oauth.SessionAuthorizedApplication, app)
+	}
+}