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/*
* WebSocket endpoint handler
*
* Copyright (C) 2024 Runxi Yu <https://runxiyu.org>
* SPDX-License-Identifier: AGPL-3.0-or-later
*
* 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 <https://www.gnu.org/licenses/>.
*/
package main
import (
"log/slog"
"net/http"
"github.com/coder/websocket"
)
/*
* Handle requests to the WebSocket endpoint and establish a connection.
* Authentication is handled here, but afterwards, the connection is really
* handled in handleConn.
*/
func handleWs(w http.ResponseWriter, req *http.Request) {
defer func() {
if e := recover(); e != nil {
slog.Error("panic", "arg", e)
}
}()
wsOptions := &websocket.AcceptOptions{
Subprotocols: []string{"cca1"},
} //exhaustruct:ignore
c, err := websocket.Accept(
w,
req,
wsOptions,
)
if err != nil {
wstr(
w,
http.StatusBadRequest,
"this endpoint only supports valid WebSocket connections: "+err.Error(),
)
return
}
defer func() {
_ = c.CloseNow()
}()
userID, _, department, err := getUserInfoFromRequest(req)
if err != nil {
_ = writeText(req.Context(), c, "U")
return
}
err = handleConn(req.Context(), c, userID, department)
if err != nil {
slog.Error(
"websocket",
"user", userID,
"error", err,
)
_ = writeText(req.Context(), c, "E :"+err.Error())
return
}
}
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