74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
// Copyright (c) 2014-2017, b3log.org & hacpai.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package util
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import (
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"errors"
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"net/http"
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"time"
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"github.com/gorilla/websocket"
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)
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// WSChannel represents a WebSocket channel.
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type WSChannel struct {
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Sid string // wide session id
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Conn *websocket.Conn // websocket connection
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Request *http.Request // HTTP request related
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Time time.Time // the latest use time
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}
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// WriteJSON writes the JSON encoding of v to the channel.
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func (c *WSChannel) WriteJSON(v interface{}) (ret error) {
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if nil == c.Conn {
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return errors.New("connection is nil, channel has been closed")
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}
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defer func() {
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if r := recover(); nil != r {
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ret = errors.New("channel has been closed")
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}
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}()
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return c.Conn.WriteJSON(v)
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}
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// ReadJSON reads the next JSON-encoded message from the channel and stores it in the value pointed to by v.
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func (c *WSChannel) ReadJSON(v interface{}) (ret error) {
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if nil == c.Conn {
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return errors.New("connection is nil, channel has been closed")
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}
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defer func() {
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if r := recover(); nil != r {
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ret = errors.New("channel has been closed")
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}
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}()
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return c.Conn.ReadJSON(v)
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}
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// Close closed the channel.
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func (c *WSChannel) Close() {
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if nil != c.Conn {
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c.Conn.Close()
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}
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}
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// Refresh refreshes the channel by updating its use time.
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func (c *WSChannel) Refresh() {
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c.Time = time.Now()
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}
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