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306 lines
8.3 KiB
306 lines
8.3 KiB
// Copyright © 2023 OpenIM. All rights reserved.
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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 msggateway
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import (
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"context"
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"errors"
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"fmt"
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"runtime/debug"
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"sync"
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"github.com/OpenIMSDK/Open-IM-Server/pkg/msgprocessor"
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"google.golang.org/protobuf/proto"
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"github.com/OpenIMSDK/protocol/constant"
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"github.com/OpenIMSDK/protocol/sdkws"
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"github.com/OpenIMSDK/tools/apiresp"
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"github.com/OpenIMSDK/tools/log"
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"github.com/OpenIMSDK/tools/mcontext"
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"github.com/OpenIMSDK/tools/utils"
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)
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var (
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ErrConnClosed = errors.New("conn has closed")
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ErrNotSupportMessageProtocol = errors.New("not support message protocol")
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ErrClientClosed = errors.New("client actively close the connection")
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ErrPanic = errors.New("panic error")
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)
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const (
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// MessageText is for UTF-8 encoded text messages like JSON.
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MessageText = iota + 1
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// MessageBinary is for binary messages like protobufs.
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MessageBinary
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// CloseMessage denotes a close control message. The optional message
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// payload contains a numeric code and text. Use the FormatCloseMessage
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// function to format a close message payload.
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CloseMessage = 8
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// PingMessage denotes a ping control message. The optional message payload
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// is UTF-8 encoded text.
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PingMessage = 9
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// PongMessage denotes a pong control message. The optional message payload
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// is UTF-8 encoded text.
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PongMessage = 10
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)
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type PongHandler func(string) error
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type Client struct {
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w *sync.Mutex
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conn LongConn
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PlatformID int `json:"platformID"`
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IsCompress bool `json:"isCompress"`
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UserID string `json:"userID"`
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IsBackground bool `json:"isBackground"`
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ctx *UserConnContext
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longConnServer LongConnServer
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closed bool
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closedErr error
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token string
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}
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func newClient(ctx *UserConnContext, conn LongConn, isCompress bool) *Client {
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return &Client{
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w: new(sync.Mutex),
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conn: conn,
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PlatformID: utils.StringToInt(ctx.GetPlatformID()),
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IsCompress: isCompress,
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UserID: ctx.GetUserID(),
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ctx: ctx,
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}
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}
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func (c *Client) ResetClient(
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ctx *UserConnContext,
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conn LongConn,
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isBackground, isCompress bool,
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longConnServer LongConnServer,
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token string,
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) {
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c.w = new(sync.Mutex)
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c.conn = conn
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c.PlatformID = utils.StringToInt(ctx.GetPlatformID())
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c.IsCompress = isCompress
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c.IsBackground = isBackground
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c.UserID = ctx.GetUserID()
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c.ctx = ctx
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c.longConnServer = longConnServer
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c.IsBackground = false
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c.closed = false
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c.closedErr = nil
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c.token = token
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}
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func (c *Client) pongHandler(_ string) error {
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c.conn.SetReadDeadline(pongWait)
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return nil
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}
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func (c *Client) readMessage() {
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defer func() {
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if r := recover(); r != nil {
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c.closedErr = ErrPanic
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fmt.Println("socket have panic err:", r, string(debug.Stack()))
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}
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c.close()
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}()
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c.conn.SetReadLimit(maxMessageSize)
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_ = c.conn.SetReadDeadline(pongWait)
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c.conn.SetPongHandler(c.pongHandler)
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for {
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messageType, message, returnErr := c.conn.ReadMessage()
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if returnErr != nil {
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c.closedErr = returnErr
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return
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}
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log.ZDebug(c.ctx, "readMessage", "messageType", messageType)
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if c.closed == true { // 连接刚置位已经关闭，但是协程还没退出的场景
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c.closedErr = ErrConnClosed
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return
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}
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switch messageType {
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case MessageBinary:
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parseDataErr := c.handleMessage(message)
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if parseDataErr != nil {
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c.closedErr = parseDataErr
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return
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}
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case MessageText:
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c.closedErr = ErrNotSupportMessageProtocol
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return
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case PingMessage:
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err := c.writePongMsg()
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log.ZError(c.ctx, "writePongMsg", err)
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case CloseMessage:
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c.closedErr = ErrClientClosed
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return
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default:
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}
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}
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}
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func (c *Client) handleMessage(message []byte) error {
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if c.IsCompress {
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var decompressErr error
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message, decompressErr = c.longConnServer.DeCompress(message)
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if decompressErr != nil {
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return utils.Wrap(decompressErr, "")
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}
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}
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var binaryReq Req
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err := c.longConnServer.Decode(message, &binaryReq)
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if err != nil {
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return utils.Wrap(err, "")
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}
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if err := c.longConnServer.Validate(binaryReq); err != nil {
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return utils.Wrap(err, "")
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}
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if binaryReq.SendID != c.UserID {
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return utils.Wrap(errors.New("exception conn userID not same to req userID"), binaryReq.String())
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}
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ctx := mcontext.WithMustInfoCtx(
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[]string{binaryReq.OperationID, binaryReq.SendID, constant.PlatformIDToName(c.PlatformID), c.ctx.GetConnID()},
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)
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log.ZDebug(ctx, "gateway req message", "req", binaryReq.String())
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var messageErr error
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var resp []byte
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switch binaryReq.ReqIdentifier {
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case WSGetNewestSeq:
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resp, messageErr = c.longConnServer.GetSeq(ctx, binaryReq)
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case WSSendMsg:
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resp, messageErr = c.longConnServer.SendMessage(ctx, binaryReq)
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case WSSendSignalMsg:
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resp, messageErr = c.longConnServer.SendSignalMessage(ctx, binaryReq)
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case WSPullMsgBySeqList:
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resp, messageErr = c.longConnServer.PullMessageBySeqList(ctx, binaryReq)
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case WsLogoutMsg:
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resp, messageErr = c.longConnServer.UserLogout(ctx, binaryReq)
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case WsSetBackgroundStatus:
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resp, messageErr = c.setAppBackgroundStatus(ctx, binaryReq)
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default:
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return fmt.Errorf(
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"ReqIdentifier failed,sendID:%s,msgIncr:%s,reqIdentifier:%d",
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binaryReq.SendID,
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binaryReq.MsgIncr,
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binaryReq.ReqIdentifier,
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)
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}
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c.replyMessage(ctx, &binaryReq, messageErr, resp)
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return nil
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}
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func (c *Client) setAppBackgroundStatus(ctx context.Context, req Req) ([]byte, error) {
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resp, isBackground, messageErr := c.longConnServer.SetUserDeviceBackground(ctx, req)
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if messageErr != nil {
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return nil, messageErr
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}
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c.IsBackground = isBackground
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// todo callback
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return resp, nil
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}
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func (c *Client) close() {
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c.w.Lock()
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defer c.w.Unlock()
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c.closed = true
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c.conn.Close()
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c.longConnServer.UnRegister(c)
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}
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func (c *Client) replyMessage(ctx context.Context, binaryReq *Req, err error, resp []byte) {
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errResp := apiresp.ParseError(err)
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mReply := Resp{
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ReqIdentifier: binaryReq.ReqIdentifier,
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MsgIncr: binaryReq.MsgIncr,
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OperationID: binaryReq.OperationID,
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ErrCode: errResp.ErrCode,
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ErrMsg: errResp.ErrMsg,
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Data: resp,
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}
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log.ZDebug(ctx, "gateway reply message", "resp", mReply.String())
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err = c.writeBinaryMsg(mReply)
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if err != nil {
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log.ZWarn(ctx, "wireBinaryMsg replyMessage", err, "resp", mReply.String())
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}
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}
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func (c *Client) PushMessage(ctx context.Context, msgData *sdkws.MsgData) error {
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var msg sdkws.PushMessages
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conversationID := msgprocessor.GetConversationIDByMsg(msgData)
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m := map[string]*sdkws.PullMsgs{conversationID: {Msgs: []*sdkws.MsgData{msgData}}}
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if msgprocessor.IsNotification(conversationID) {
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msg.NotificationMsgs = m
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} else {
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msg.Msgs = m
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}
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log.ZDebug(ctx, "PushMessage", "msg", &msg)
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data, err := proto.Marshal(&msg)
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if err != nil {
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return err
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}
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resp := Resp{
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ReqIdentifier: WSPushMsg,
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OperationID: mcontext.GetOperationID(ctx),
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Data: data,
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}
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return c.writeBinaryMsg(resp)
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}
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func (c *Client) KickOnlineMessage() error {
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resp := Resp{
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ReqIdentifier: WSKickOnlineMsg,
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}
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return c.writeBinaryMsg(resp)
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}
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func (c *Client) writeBinaryMsg(resp Resp) error {
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c.w.Lock()
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defer c.w.Unlock()
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if c.closed == true {
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return nil
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}
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encodedBuf := bufferPool.Get().([]byte)
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resultBuf := bufferPool.Get().([]byte)
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encodedBuf, err := c.longConnServer.Encode(resp)
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if err != nil {
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return utils.Wrap(err, "")
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}
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_ = c.conn.SetWriteDeadline(writeWait)
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if c.IsCompress {
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var compressErr error
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resultBuf, compressErr = c.longConnServer.Compress(encodedBuf)
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if compressErr != nil {
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return utils.Wrap(compressErr, "")
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}
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return c.conn.WriteMessage(MessageBinary, resultBuf)
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} else {
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return c.conn.WriteMessage(MessageBinary, encodedBuf)
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}
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}
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func (c *Client) writePongMsg() error {
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c.w.Lock()
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defer c.w.Unlock()
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if c.closed == true {
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return nil
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}
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_ = c.conn.SetWriteDeadline(writeWait)
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return c.conn.WriteMessage(PongMessage, nil)
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}
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