197 lines
4.1 KiB
Go
197 lines
4.1 KiB
Go
package main
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import (
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"io"
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"log"
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"net"
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"sync"
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)
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type CartPacketQueue struct {
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mu sync.RWMutex
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expectedPackages map[uint32]*CartListener
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}
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const CurrentPacketVersion = 2
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type CartListener map[CartId]chan []byte
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func NewCartPacketQueue(connection net.Conn) *CartPacketQueue {
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queue := &CartPacketQueue{
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expectedPackages: make(map[uint32]*CartListener),
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}
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go queue.HandleConnection(connection)
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return queue
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}
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func (p *CartPacketQueue) HandleConnection(connection net.Conn) error {
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defer connection.Close()
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var packet CartPacket
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for {
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err := ReadCartPacket(connection, &packet)
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if err != nil {
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if err == io.EOF {
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return nil
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}
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log.Printf("Error receiving packet: %v\n", err)
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return err
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}
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if packet.Version != CurrentPacketVersion {
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log.Printf("Error receiving packet: %v\n", err)
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continue
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}
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if packet.DataLength == 0 {
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go p.HandleData(packet.MessageType, packet.Id, []byte{})
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continue
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}
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data, err := GetPacketData(connection, packet.DataLength)
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if err != nil {
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log.Printf("Error receiving packet data: %v\n", err)
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return err
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}
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go p.HandleData(packet.MessageType, packet.Id, data)
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}
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}
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func (p *CartPacketQueue) HandleData(t uint32, id CartId, data []byte) {
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p.mu.Lock()
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defer p.mu.Unlock()
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l, ok := p.expectedPackages[t]
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if ok {
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ch, ok := (*l)[id]
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if ok {
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ch <- data
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close(ch)
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delete(*l, id)
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}
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}
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data = nil
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}
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func (p *CartPacketQueue) Expect(messageType uint32, id CartId) <-chan []byte {
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p.mu.Lock()
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defer p.mu.Unlock()
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l, ok := p.expectedPackages[messageType]
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if ok {
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if ch, idOk := (*l)[id]; idOk {
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return ch
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}
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ch := make(chan []byte)
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(*l)[id] = ch
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return ch
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}
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ch := make(chan []byte)
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p.expectedPackages[messageType] = &CartListener{
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id: ch,
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}
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return ch
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}
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// package main
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// import (
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// "fmt"
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// "io"
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// "log"
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// "net"
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// "sync"
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// "time"
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// )
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// type CartPacketWithData struct {
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// MessageType uint32
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// Id CartId
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// Added time.Time
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// Consumed bool
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// Data []byte
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// }
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// type CartPacketQueue struct {
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// mu sync.RWMutex
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// Packets []CartPacketWithData
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// //connection net.Conn
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// }
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// const cartCap = 150
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// func NewCartPacketQueue(connection net.Conn) *CartPacketQueue {
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// queue := &CartPacketQueue{
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// Packets: make([]CartPacketWithData, 0, cartCap),
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// //connection: connection,
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// }
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// go func() {
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// defer connection.Close()
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// var packet CartPacket
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// for {
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// err := ReadCartPacket(connection, &packet)
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// if err != nil {
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// if err == io.EOF {
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// return
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// }
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// log.Printf("Error receiving packet: %v\n", err)
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// //return
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// }
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// data, err := GetPacketData(connection, packet.DataLength)
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// if err != nil {
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// log.Printf("Error receiving packet data: %v\n", err)
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// return
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// }
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// go queue.HandleData(packet.MessageType, packet.Id, data)
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// }
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// }()
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// return queue
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// }
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// func (p *CartPacketQueue) HandleData(t uint32, id CartId, data []byte) {
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// ts := time.Now()
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// l := make([]CartPacketWithData, 0, cartCap)
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// p.mu.RLock()
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// breakAt := ts.Add(-time.Millisecond * 250)
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// for _, packet := range p.Packets {
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// if !packet.Consumed && packet.Added.After(breakAt) {
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// l = append(l, packet)
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// if len(l) >= cartCap {
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// break
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// }
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// }
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// }
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// p.mu.RUnlock()
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// p.mu.Lock()
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// p.Packets = append([]CartPacketWithData{
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// {
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// MessageType: t,
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// Id: id,
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// Added: ts,
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// Data: data,
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// },
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// }, l...)
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// p.mu.Unlock()
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// }
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// func (p *CartPacketQueue) Expect(messageType uint32, id CartId, timeToWait time.Duration) (*CartPacketWithData, error) {
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// start := time.Now().Add(-time.Millisecond)
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// for {
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// if time.Since(start) > timeToWait {
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// return nil, fmt.Errorf("timeout waiting for message type %d", messageType)
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// }
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// p.mu.RLock()
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// for _, packet := range p.Packets {
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// if !packet.Consumed && packet.MessageType == messageType && packet.Id == id && packet.Added.After(start) {
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// packet.Consumed = true
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// p.mu.RUnlock()
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// return &packet, nil
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// }
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// }
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// p.mu.RUnlock()
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// time.Sleep(time.Millisecond * 2)
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// }
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// }
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