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Open-IM-Server/internal/msggateway/long_conn.go

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4.6 KiB

// Copyright © 2023 OpenIM. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package msggateway
import (
"errors"
"net/http"
"time"
"github.com/OpenIMSDK/tools/errs"
"github.com/gorilla/websocket"
)
type LongConn interface {
// Close this connection
Close() error
// WriteMessage Write message to connection,messageType means data type,can be set binary(2) and text(1).
WriteMessage(messageType int, message []byte) error
// ReadMessage Read message from connection.
ReadMessage() (int, []byte, error)
// SetReadDeadline sets the read deadline on the underlying network connection,
// after a read has timed out, will return an error.
SetReadDeadline(timeout time.Duration) error
// SetWriteDeadline sets to write deadline when send message,when read has timed out,will return error.
SetWriteDeadline(timeout time.Duration) error
// Dial Try to dial a connection,url must set auth args,header can control compress data
Dial(urlStr string, requestHeader http.Header) (*http.Response, error)
// IsNil Whether the connection of the current long connection is nil
IsNil() bool
// SetConnNil Set the connection of the current long connection to nil
SetConnNil()
// SetReadLimit sets the maximum size for a message read from the peer.bytes
SetReadLimit(limit int64)
SetPongHandler(handler PingPongHandler)
SetPingHandler(handler PingPongHandler)
// GenerateLongConn Check the connection of the current and when it was sent are the same
GenerateLongConn(w http.ResponseWriter, r *http.Request) error
}
type GWebSocket struct {
protocolType int
conn *websocket.Conn
handshakeTimeout time.Duration
writeBufferSize int
}
func newGWebSocket(protocolType int, handshakeTimeout time.Duration, wbs int) *GWebSocket {
return &GWebSocket{protocolType: protocolType, handshakeTimeout: handshakeTimeout, writeBufferSize: wbs}
}
func (d *GWebSocket) Close() error {
return d.conn.Close()
}
func (d *GWebSocket) GenerateLongConn(w http.ResponseWriter, r *http.Request) error {
upgrader := &websocket.Upgrader{
HandshakeTimeout: d.handshakeTimeout,
CheckOrigin: func(r *http.Request) bool { return true },
}
if d.writeBufferSize > 0 { // default is 4kb.
upgrader.WriteBufferSize = d.writeBufferSize
}
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
// The upgrader.Upgrade method usually returns enough error messages to diagnose problems that may occur during the upgrade
return errs.Wrap(err, "GenerateLongConn: WebSocket upgrade failed")
}
d.conn = conn
return nil
}
func (d *GWebSocket) WriteMessage(messageType int, message []byte) error {
// d.setSendConn(d.conn)
return d.conn.WriteMessage(messageType, message)
}
//func (d *GWebSocket) setSendConn(sendConn *websocket.Conn) {
// d.sendConn = sendConn
//}
func (d *GWebSocket) ReadMessage() (int, []byte, error) {
return d.conn.ReadMessage()
}
func (d *GWebSocket) SetReadDeadline(timeout time.Duration) error {
return d.conn.SetReadDeadline(time.Now().Add(timeout))
}
func (d *GWebSocket) SetWriteDeadline(timeout time.Duration) error {
// TODO add error
if timeout <= 0 {
return errs.Wrap(errors.New("timeout must be greater than 0"))
}
// TODO SetWriteDeadline Future add error handling
if err := d.conn.SetWriteDeadline(time.Now().Add(timeout)); err != nil {
return errs.Wrap(err, "GWebSocket.SetWriteDeadline failed")
}
return nil
}
func (d *GWebSocket) Dial(urlStr string, requestHeader http.Header) (*http.Response, error) {
conn, httpResp, err := websocket.DefaultDialer.Dial(urlStr, requestHeader)
if err == nil {
d.conn = conn
}
return httpResp, err
}
func (d *GWebSocket) IsNil() bool {
return d.conn == nil
//
// if d.conn != nil {
// return false
// }
// return true
}
func (d *GWebSocket) SetConnNil() {
d.conn = nil
}
func (d *GWebSocket) SetReadLimit(limit int64) {
d.conn.SetReadLimit(limit)
}
func (d *GWebSocket) SetPongHandler(handler PingPongHandler) {
d.conn.SetPongHandler(handler)
}
func (d *GWebSocket) SetPingHandler(handler PingPongHandler) {
d.conn.SetPingHandler(handler)
}
//func (d *GWebSocket) CheckSendConnDiffNow() bool {
// return d.conn == d.sendConn
//}