能连接和通讯，还未解析数据

protocol/frame.go

@@ -0,0 +1,106 @@
+package protocol
+
+import (
+	"errors"
+	"github.com/injoyai/base/bytes"
+	"github.com/injoyai/base/g"
+	"github.com/injoyai/conv"
+	"io"
+)
+
+const (
+	// Prefix 固定帧头
+	Prefix = 0x0c
+)
+
+type Message interface {
+	Bytes() g.Bytes
+}
+
+/*
+Frame 数据帧
+0c 02189300 01 0300 0300 0d00 01
+0c 00000000 00 0200 0200 1500
+0c 01000000 01 0300 0300 0d00 01
+0c 01000000 01 0300 0300 0d00 01
+0c 02000000 01 1a00 1a00 3e05 050000000000000002000030303030303101363030303038
+
+0c0100000001030003000d0001
+*/
+type Frame struct {
+	MsgID   uint32 //消息ID
+	Control uint8  //控制码，这个还不知道怎么定义
+	Type    uint16 //请求类型，如建立连接，请求分时数据等
+	Data    []byte //数据
+}
+
+func (this *Frame) Bytes() g.Bytes {
+	length := uint16(len(this.Data) + 2)
+	data := make([]byte, 12+len(this.Data))
+	data[0] = Prefix
+	copy(data[1:], Bytes(this.MsgID))
+	data[5] = this.Control
+	copy(data[6:], Bytes(length))
+	copy(data[8:], Bytes(length))
+	copy(data[10:], Bytes(this.Type))
+	copy(data[12:], this.Data)
+	return data
+}
+
+func Bytes(n any) []byte {
+	return bytes.Reverse(conv.Bytes(n))
+}
+
+func Decode(bs []byte) (*Frame, error) {
+	if len(bs) < 10 {
+		return nil, errors.New("数据长度不足")
+	}
+	f := &Frame{}
+
+	return f, nil
+}
+
+// ReadFrom 这里的r推荐传入*bufio.Reader
+func ReadFrom(r io.Reader) ([]byte, error) {
+	result := []byte(nil)
+	b := make([]byte, 1)
+	for {
+		result = []byte(nil)
+
+		n, err := r.Read(b)
+		if err != nil {
+			return nil, err
+		}
+		if n == 0 || b[0] != Prefix {
+			continue
+		}
+
+		result = append(result, b[0])
+
+		//读取9字节 消息ID+控制码+2个字节长度
+		buf := make([]byte, 9)
+		n, err = r.Read(buf)
+		if err != nil {
+			return nil, err
+		}
+		if n != 9 {
+			continue
+		}
+		result = append(result, buf...)
+
+		//获取后续字节长度
+		length := uint16(result[9])<<8 + uint16(result[10])
+		buf = make([]byte, length)
+		n, err = r.Read(buf)
+		if err != nil {
+			return nil, err
+		}
+		if n != int(length) {
+			continue
+		}
+		result = append(result, buf...)
+
+		return result, nil
+	}
+
+}