72 lines
2.0 KiB
Go
72 lines
2.0 KiB
Go
package logic
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//复用websocket连接标识
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import (
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"encoding/json"
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"fmt"
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"fusenapi/constants"
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"fusenapi/utils/encryption_decryption"
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"github.com/zeromicro/go-zero/core/logx"
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)
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// 复用连接处理器
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type reuseConnProcesser struct {
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w *wsConnectItem
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}
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func (r *reuseConnProcesser) allocationMessage(data []byte) {
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logx.Info("收到请求恢复上次连接标识数据:", string(data))
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var wid string
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if err := json.Unmarshal(data, &wid); err != nil {
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logx.Error(" invalid format of wid :", wid)
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r.w.incomeDataFormatErrResponse("invalid format of wid")
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return
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}
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//解密
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decryptionWid, err := encryption_decryption.CBCDecrypt(wid)
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if err != nil {
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r.w.reuseLastConnErrResponse("invalid wid")
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return
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}
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lendecryptionWid := len(decryptionWid)
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//合成client后缀,不是同个后缀的不能复用
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userPart := getUserJoinPart(r.w.userId, r.w.guestId, r.w.userAgent)
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lenUserPart := len(userPart)
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if lendecryptionWid <= lenUserPart {
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r.w.reuseLastConnErrResponse("length of client id is to short")
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return
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}
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//尾部不同不能复用
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if decryptionWid[lendecryptionWid-lenUserPart:] != userPart {
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r.w.reuseLastConnErrResponse("the client id is not belong to you before")
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return
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}
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//存在是不能给他申请重新绑定
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if v, ok := mapConnPool.Load(wid); ok {
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obj, ok := v.(wsConnectItem)
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if !ok {
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logx.Error("连接断言失败")
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}
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//是当前自己占用(无需处理)
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if obj.uniqueId == r.w.uniqueId {
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rsp := r.w.respondDataFormat(constants.WEBSOCKET_CONNECT_SUCCESS, wid)
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r.w.sendToOutChan(rsp)
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return
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} else {
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r.w.reuseLastConnErrResponse("the wid is used by other people")
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return
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}
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}
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//重新绑定
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r.w.uniqueId = wid
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mapConnPool.Store(wid, *r.w)
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rsp := r.w.respondDataFormat(constants.WEBSOCKET_CONNECT_SUCCESS, wid)
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r.w.sendToOutChan(rsp)
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return
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}
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// 获取用户拼接部分(复用标识用到)
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func getUserJoinPart(userId, guestId int64, userAgent string) string {
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return fmt.Sprintf("|_%d_%d_|_%s_|", userId, guestId, userAgent)
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}
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