mirror of
https://gitee.com/energye/energy.git
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454 lines
12 KiB
Go
454 lines
12 KiB
Go
//----------------------------------------
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//
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// Copyright © yanghy. All Rights Reserved.
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//
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// Licensed under Apache License Version 2.0, January 2004
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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//----------------------------------------
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// IPC Channel
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// Communication between multiple processes
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package channel
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import (
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"bytes"
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"encoding/binary"
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"errors"
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"github.com/energye/energy/v2/cef/process"
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"github.com/energye/energy/v2/common"
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. "github.com/energye/energy/v2/consts"
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"github.com/energye/energy/v2/logger"
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"github.com/energye/energy/v2/pkgs/json"
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"github.com/energye/golcl/lcl/rtl/version"
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"math"
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"net"
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"os"
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"path/filepath"
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"runtime"
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"strconv"
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"strings"
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)
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var (
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protocolHeader = []byte{0x01, 0x09, 0x08, 0x07, 0x00, 0x08, 0x02, 0x02} // 协议头
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protocolHeaderLength = int32(len(protocolHeader)) // 协议头长度
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messageTypeLength = int32(1) // 消息类型 int8
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processIdLength = int32(1) // 消息来源 int8
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channelIdLength = int32(8) // 发送通道 int64
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toChannelIdLength = int32(8) // 接收通道 int64
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dataByteLength = int32(4) // 数据长度 int32
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headerLength = int(protocolHeaderLength + messageTypeLength + processIdLength + channelIdLength + toChannelIdLength + dataByteLength) // 协议头长度
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)
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var (
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memoryAddress = "energy.sock" //
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ipcSock string // sock path
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useNetIPCChannel = false //
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port = 0 // net ipc default: 0
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)
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// IPCNetSocketPortKey IPC 监听端口号的Key名, 在初始化之前该值可被改变
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var IPCNetSocketPortKey = "--energy-ipc-net-socket-port"
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// mt 消息类型
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type mt int8
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const (
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mt_invalid mt = iota - 1 // 无效类型
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mt_connection // 建立链接消息
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mt_connectd // 已链接消息
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mt_update_channel_id // 更新通道ID消息
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mt_common // 普通消息
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mt_relay // 转发消息
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)
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// IPCCallback 回调
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type IPCCallback func(context IIPCContext)
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func init() {
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ipcSock = filepath.Join(os.TempDir(), memoryAddress)
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}
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func removeMemory() {
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os.Remove(ipcSock)
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}
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func UseNetIPCChannel() bool {
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return useNetIPCChannel
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}
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func MemoryAddress() string {
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return memoryAddress
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}
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// IsUseNetIPC
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//
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// 当前IPC使用的通道类型
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// MacOS, Linux, Windows10 && Build >= 17063 时使用 unix socket
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// Windows10 以下 && Windows10 Build < 17063 时使用 net socket
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func IsUseNetIPC() bool {
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if common.IsDarwin() || common.IsLinux() {
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return false
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}
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goVersion := strings.Replace(runtime.Version(), "go", "", -1)
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vers := strings.Split(goVersion, ".")
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supoortWindows := common.StrToInt32(vers[0]) >= 1 && common.StrToInt32(vers[1]) >= 14 // Go 版本 >= 1.14 支持Windows
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ov := version.OSVersion
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if ((ov.Major > 10) || (ov.Major == 10 && ov.Build >= 17063)) && supoortWindows {
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return false
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}
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return true
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}
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// SetPort 设置 net socket 端口号, 如参数 "v" 非指定范围内端口则获取随机未使用端口号
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//
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// v 1024 ~ 65535
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func SetPort(v int) {
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if v >= 1024 && v < 65535 {
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port = v
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} else {
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port = 0
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port = Port()
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}
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}
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// Port 获取并返回未使用的net socket端口
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func Port() int {
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if port != 0 {
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return port
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}
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//主进程获取端口号
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if process.Args.IsMain() {
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addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
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if err != nil {
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panic("Failed to Get unused Port number Error: " + err.Error())
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}
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listen, err := net.ListenTCP("tcp", addr)
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if err != nil {
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panic("Failed to Get unused Port number Error: " + err.Error())
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}
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defer listen.Close()
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port = listen.Addr().(*net.TCPAddr).Port
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// 主进程(浏览器进程)环境变量以使子进程获取这个端口
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os.Setenv(IPCNetSocketPortKey, strconv.Itoa(port))
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} else if process.Args.IsRender() {
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// 子进程(渲染进程)获取这个端口号
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nsp := os.Getenv(IPCNetSocketPortKey)
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port, _ = strconv.Atoi(nsp)
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}
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return port
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}
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// IIPCContext IPC通信回调上下文
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type IIPCContext interface {
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Connect() net.Conn // IPC 通道链接
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ChannelId() int64 // 返回 发送通道ID
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ToChannelId() int64 // 返回 接收发送通道ID
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ChannelType() ChannelType // 返回 当前通道类型
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ProcessId() CefProcessId // 返回 通道消息来源
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Message() IMessage // 消息
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Free() //
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}
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// IMessage 消息内容接口
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type IMessage interface {
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Type() mt // 消息类型
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Length() int32 // 数据长度
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Data() []byte // 数据
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JSON() json.JSON // 转为 JSON 对象并返回
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clear() // 清空
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}
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// IChannel 通道链接
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type IChannel interface {
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IsConnect() bool
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Close()
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read(b []byte) (n int, err error)
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write(messageType mt, channelId, toChannelId int64, data []byte) (n int, err error)
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}
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type IBrowserChannel interface {
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Channel(channelId int64) IChannel
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ChannelIds() (result []int64)
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Send(channelId int64, data []byte)
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Handler(handler IPCCallback)
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Close()
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}
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type IRenderChannel interface {
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Channel() IChannel
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Send(data []byte)
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SendToChannel(toChannelId int64, data []byte)
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UpdateChannelId(toChannelId int64)
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Handler(handler IPCCallback)
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Close()
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}
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// ipcMessage 消息内容
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type ipcMessage struct {
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t mt // type
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s int32 // size
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v []byte // data
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}
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// IPCContext IPC 上下文
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type IPCContext struct {
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channelId int64 //render channelId
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toChannelId int64 //
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ipcType IPC_TYPE // ipc type
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channelType ChannelType // ipc channel type
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processId CefProcessId // ipc msg source, browser or render
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connect net.Conn // connect
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message IMessage // message
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}
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// Free 释放消息内存空间
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func (m *IPCContext) Free() {
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if m.message != nil {
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m.message.clear()
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m.message = nil
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}
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}
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// ChannelId 返回发送通道ID
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func (m *IPCContext) ChannelId() int64 {
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return m.channelId
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}
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// ToChannelId 返回接收通道ID
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func (m *IPCContext) ToChannelId() int64 {
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return m.toChannelId
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}
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// ChannelType 返回当前通道类型
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func (m *IPCContext) ChannelType() ChannelType {
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return m.channelType
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}
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func (m *IPCContext) ProcessId() CefProcessId {
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return m.processId
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}
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// Message 返回消息内容
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func (m *IPCContext) Message() IMessage {
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return m.message
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}
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// Connect 返回当前通道链接
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func (m *IPCContext) Connect() net.Conn {
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return m.connect
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}
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// Type 消息类型
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func (m *ipcMessage) Type() mt {
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return m.t
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}
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// Data 消息[]byte数据
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func (m *ipcMessage) Data() []byte {
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return m.v
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}
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// Length 消息[]byte长度
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func (m *ipcMessage) Length() int32 {
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return m.s
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}
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// JSON 消息转为JSON对象
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func (m *ipcMessage) JSON() json.JSON {
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return json.NewJSON(m.v)
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}
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// clear 清空内容
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func (m *ipcMessage) clear() {
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m.t = mt_invalid
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m.v = nil
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m.s = 0
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}
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// channel 通道
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type channel struct {
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channelId int64
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isConnect bool
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conn net.Conn
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ipcType IPC_TYPE
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channelType ChannelType
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handler IPCCallback
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}
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// IsConnect return is connect success
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func (m *channel) IsConnect() bool {
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if m == nil {
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return false
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}
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return m.isConnect
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}
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// Close the current IPC channel connect
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func (m *channel) Close() {
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if m.conn != nil {
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m.conn.Close()
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m.conn = nil
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}
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}
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// read data
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func (m *channel) read(b []byte) (n int, err error) {
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if m.ipcType == IPCT_NET {
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return m.conn.Read(b)
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} else {
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n, _, err := m.conn.(*net.UnixConn).ReadFromUnix(b)
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return n, err
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}
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}
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// write data
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func (m *channel) write(messageType mt, channelId, toChannelId int64, data []byte) (n int, err error) {
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defer func() {
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data = nil
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}()
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if m.conn == nil {
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return 0, errors.New("channel link not established successfully")
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}
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var (
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dataByteLen = len(data)
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)
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if dataByteLen > math.MaxInt32 {
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return 0, errors.New("exceeded maximum message length")
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}
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var processId CefProcessId
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if m.channelType == Ct_Server {
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processId = PID_BROWSER
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} else {
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processId = PID_RENDER
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}
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var writeBuf = new(bytes.Buffer)
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_ = binary.Write(writeBuf, binary.BigEndian, protocolHeader) //protocol header
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_ = binary.Write(writeBuf, binary.BigEndian, int8(messageType)) //message type
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_ = binary.Write(writeBuf, binary.BigEndian, int8(processId)) //source of information
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_ = binary.Write(writeBuf, binary.BigEndian, channelId) //source channel Id
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_ = binary.Write(writeBuf, binary.BigEndian, toChannelId) //to channel Id
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_ = binary.Write(writeBuf, binary.BigEndian, int32(dataByteLen)) //data length
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_ = binary.Write(writeBuf, binary.BigEndian, data) //data bytes
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n, err = m.conn.Write(writeBuf.Bytes())
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writeBuf.Reset()
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writeBuf = nil
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return n, err
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}
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// ipcRead Read channel messages
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func (m *channel) ipcRead() {
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var ipcType, chnType string
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if m.ipcType == IPCT_NET {
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ipcType = "[net]"
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} else {
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ipcType = "[unix]"
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}
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if m.channelType == Ct_Server {
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chnType = "[server]"
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} else {
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chnType = "[client]"
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}
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defer func() {
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logger.Debug("IPC Read Disconnect type:", ipcType, "ChannelType:", chnType, "processType:", process.Args.ProcessType())
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m.Close()
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}()
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for {
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header := make([]byte, headerLength)
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size, err := m.read(header)
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if err != nil {
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logger.Debug("IPC Read [Error] type:", ipcType, "ChannelType:", chnType, "Error:", err)
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return
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} else if size == 0 {
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logger.Debug("IPC Read [Size == 0] type:", ipcType, "ChannelType:", chnType, "header:", header, "Error:", err)
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return
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}
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if size == headerLength {
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for i, protocol := range protocolHeader {
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if header[i] != protocol {
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logger.Debug("check header protocol error", i, header[i], protocol)
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return
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}
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}
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var (
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t, proId int8 //
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channelId, toChannelId int64 //
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dataLen int32 //数据长度
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low, high int32 //
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)
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//message type
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low = protocolHeaderLength
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high = protocolHeaderLength + messageTypeLength
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err = binary.Read(bytes.NewReader(header[low:high]), binary.BigEndian, &t)
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if err != nil {
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logger.Debug("binary.Read.t: ", err)
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return
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}
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//message source
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low = high
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high = high + processIdLength
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err = binary.Read(bytes.NewReader(header[low:high]), binary.BigEndian, &proId)
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if err != nil {
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logger.Debug("binary.Read.t: ", err)
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return
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}
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//send channel id
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low = high
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high = high + channelIdLength
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err = binary.Read(bytes.NewReader(header[low:high]), binary.BigEndian, &channelId)
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if err != nil {
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logger.Debug("binary.Read.channelId: ", err)
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return
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}
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//receive channel id
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low = high
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high = high + toChannelIdLength
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err = binary.Read(bytes.NewReader(header[low:high]), binary.BigEndian, &toChannelId)
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if err != nil {
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logger.Debug("binary.Read.toChannelId: ", err)
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return
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}
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//data length
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low = high
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high = high + dataByteLength
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err = binary.Read(bytes.NewReader(header[low:high]), binary.BigEndian, &dataLen)
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if err != nil {
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logger.Debug("binary.Read.dataLen: ", err)
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return
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}
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//data
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dataByte := make([]byte, dataLen)
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if dataLen > 0 {
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size, err = m.read(dataByte)
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}
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if err != nil {
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logger.Debug("binary.Read.dataByte: ", err)
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return
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}
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// call handler
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m.handler(&IPCContext{
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channelId: channelId,
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toChannelId: toChannelId,
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ipcType: m.ipcType,
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connect: m.conn,
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channelType: m.channelType,
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processId: CefProcessId(proId),
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message: &ipcMessage{ // message data
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t: mt(t),
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s: dataLen,
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v: dataByte,
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},
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})
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} else {
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logger.Debug("invalid != headerLength")
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break
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}
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}
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}
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