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context.go
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context.go
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package linker
import (
"bytes"
"context"
"hash/crc32"
"net"
"runtime"
"strconv"
"strings"
"github.com/gorilla/websocket"
"github.com/wpajqz/linker/codec"
)
var _ Context = new(ContextTcp)
var _ Context = new(ContextWebsocket)
type (
Context interface {
WithValue(key interface{}, value interface{}) Context
Value(key interface{}) interface{}
ParseParam(data interface{}) error
Success(body interface{})
Error(code int, message string)
Write(operator string, body interface{}) (int, error)
SetRequestProperty(key, value string)
GetRequestProperty(key string) string
SetResponseProperty(key, value string)
GetResponseProperty(key string) string
LocalAddr() string
RemoteAddr() string
}
ContextTcp struct {
config Config
operateType uint32
sequence int64
body []byte
Context context.Context
Conn net.Conn
Request, Response struct {
Header, Body []byte
}
}
ContextWebsocket struct {
config Config
operateType uint32
sequence int64
body []byte
Context context.Context
Conn *webSocketConn
Request, Response struct {
Header, Body []byte
}
}
ContextUdp struct {
config Config
operateType uint32
sequence int64
body []byte
remote *net.UDPAddr
Context context.Context
Conn *net.UDPConn
Request, Response struct {
Header, Body []byte
}
}
)
func NewContextTcp(ctx context.Context, conn net.Conn, OperateType uint32, Sequence int64, Header, Body []byte, config Config) *ContextTcp {
return &ContextTcp{
Context: ctx,
Conn: conn,
operateType: OperateType,
sequence: Sequence,
config: config,
Request: struct{ Header, Body []byte }{Header: Header, Body: Body},
body: Body,
}
}
func (c *ContextTcp) WithValue(key interface{}, value interface{}) Context {
c.Context = context.WithValue(c.Context, key, value)
return c
}
func (c *ContextTcp) Value(key interface{}) interface{} {
return c.Context.Value(key)
}
func (c *ContextTcp) ParseParam(data interface{}) error {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
return err
}
return r.Decoder(c.body, data)
}
// 响应请求成功的数据包
func (c *ContextTcp) Success(body interface{}) {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
panic(err)
}
data, err := r.Encoder(body)
if err != nil {
panic(err)
}
p, err := NewPacket(c.operateType, c.sequence, c.Response.Header, data, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
c.Conn.Write(p.Bytes())
runtime.Goexit()
}
// 响应请求失败的数据包
func (c *ContextTcp) Error(code int, message string) {
c.SetResponseProperty("code", strconv.Itoa(code))
c.SetResponseProperty("message", message)
p, err := NewPacket(c.operateType, c.sequence, c.Response.Header, nil, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
c.Conn.Write(p.Bytes())
runtime.Goexit()
}
// 向客户端发送数据
func (c *ContextTcp) Write(operator string, body interface{}) (int, error) {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
return 0, err
}
data, err := r.Encoder(body)
if err != nil {
return 0, err
}
p, err := NewPacket(crc32.ChecksumIEEE([]byte(operator)), 0, c.Response.Header, data, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
return c.Conn.Write(p.Bytes())
}
func (c *ContextTcp) SetRequestProperty(key, value string) {
v := c.GetRequestProperty(key)
if v != "" {
c.Request.Header = bytes.Trim(c.Request.Header, key+"="+value+";")
}
c.Request.Header = append(c.Request.Header, []byte(key+"="+value+";")...)
}
func (c *ContextTcp) GetRequestProperty(key string) string {
values := strings.Split(string(c.Request.Header), ";")
for _, value := range values {
kv := strings.Split(value, "=")
if kv[0] == key {
return kv[1]
}
}
return ""
}
func (c *ContextTcp) SetResponseProperty(key, value string) {
v := c.GetResponseProperty(key)
if v != "" {
c.Response.Header = bytes.Trim(c.Response.Header, key+"="+value+";")
}
c.Response.Header = append(c.Response.Header, []byte(key+"="+value+";")...)
}
func (c *ContextTcp) GetResponseProperty(key string) string {
values := strings.Split(string(c.Response.Header), ";")
for _, value := range values {
kv := strings.Split(value, "=")
if kv[0] == key {
return kv[1]
}
}
return ""
}
func (c *ContextTcp) LocalAddr() string {
return c.Conn.LocalAddr().String()
}
func (c *ContextTcp) RemoteAddr() string {
return c.Conn.RemoteAddr().String()
}
func NewContextWebsocket(conn *webSocketConn, OperateType uint32, Sequence int64, Header, Body []byte, config Config) *ContextWebsocket {
return &ContextWebsocket{
Context: context.Background(),
Conn: conn,
operateType: OperateType,
sequence: Sequence,
config: config,
Request: struct{ Header, Body []byte }{Header: Header, Body: Body},
body: Body,
}
}
func (c *ContextWebsocket) WithValue(key interface{}, value interface{}) Context {
c.Context = context.WithValue(c.Context, key, value)
return c
}
func (c *ContextWebsocket) Value(key interface{}) interface{} {
return c.Context.Value(key)
}
func (c *ContextWebsocket) ParseParam(data interface{}) error {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
return err
}
return r.Decoder(c.body, data)
}
// 响应请求成功的数据包
func (c *ContextWebsocket) Success(body interface{}) {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
panic(err)
}
data, err := r.Encoder(body)
if err != nil {
panic(err)
}
p, err := NewPacket(c.operateType, c.sequence, c.Response.Header, data, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
c.Conn.WriteMessage(websocket.BinaryMessage, p.Bytes())
runtime.Goexit()
}
// 响应请求失败的数据包
func (c *ContextWebsocket) Error(code int, message string) {
c.SetResponseProperty("code", strconv.Itoa(code))
c.SetResponseProperty("message", message)
p, err := NewPacket(c.operateType, c.sequence, c.Response.Header, nil, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
c.Conn.WriteMessage(websocket.BinaryMessage, p.Bytes())
runtime.Goexit()
}
// 向客户端发送数据
func (c *ContextWebsocket) Write(operator string, body interface{}) (int, error) {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
return 0, err
}
data, err := r.Encoder(body)
if err != nil {
return 0, err
}
p, err := NewPacket(crc32.ChecksumIEEE([]byte(operator)), 0, c.Response.Header, data, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
return 0, c.Conn.WriteMessage(websocket.BinaryMessage, p.Bytes())
}
func (c *ContextWebsocket) SetRequestProperty(key, value string) {
v := c.GetRequestProperty(key)
if v != "" {
c.Request.Header = bytes.Trim(c.Request.Header, key+"="+value+";")
}
c.Request.Header = append(c.Request.Header, []byte(key+"="+value+";")...)
}
func (c *ContextWebsocket) GetRequestProperty(key string) string {
values := strings.Split(string(c.Request.Header), ";")
for _, value := range values {
kv := strings.Split(value, "=")
if kv[0] == key {
return kv[1]
}
}
return ""
}
func (c *ContextWebsocket) SetResponseProperty(key, value string) {
v := c.GetResponseProperty(key)
if v != "" {
c.Response.Header = bytes.Trim(c.Response.Header, key+"="+value+";")
}
c.Response.Header = append(c.Response.Header, []byte(key+"="+value+";")...)
}
func (c *ContextWebsocket) GetResponseProperty(key string) string {
values := strings.Split(string(c.Response.Header), ";")
for _, value := range values {
kv := strings.Split(value, "=")
if kv[0] == key {
return kv[1]
}
}
return ""
}
func (c *ContextWebsocket) LocalAddr() string {
return c.Conn.LocalAddr().String()
}
func (c *ContextWebsocket) RemoteAddr() string {
return c.Conn.RemoteAddr().String()
}
func NewContextUdp(conn *net.UDPConn, remote *net.UDPAddr, OperateType uint32, Sequence int64, Header, Body []byte, config Config) *ContextUdp {
return &ContextUdp{
Context: context.Background(),
Conn: conn,
remote: remote,
operateType: OperateType,
sequence: Sequence,
config: config,
Request: struct{ Header, Body []byte }{Header: Header, Body: Body},
body: Body,
}
}
func (c *ContextUdp) WithValue(key interface{}, value interface{}) Context {
c.Context = context.WithValue(c.Context, key, value)
return c
}
func (c *ContextUdp) Value(key interface{}) interface{} {
return c.Context.Value(key)
}
func (c *ContextUdp) ParseParam(data interface{}) error {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
return err
}
return r.Decoder(c.body, data)
}
// 响应请求成功的数据包
func (c *ContextUdp) Success(body interface{}) {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
panic(err)
}
data, err := r.Encoder(body)
if err != nil {
panic(err)
}
p, err := NewPacket(c.operateType, c.sequence, c.Response.Header, data, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
c.Conn.WriteToUDP(p.Bytes(), c.remote)
runtime.Goexit()
}
// 响应请求失败的数据包
func (c *ContextUdp) Error(code int, message string) {
c.SetResponseProperty("code", strconv.Itoa(code))
c.SetResponseProperty("message", message)
p, err := NewPacket(c.operateType, c.sequence, c.Response.Header, nil, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
c.Conn.WriteToUDP(p.Bytes(), c.remote)
runtime.Goexit()
}
// 向客户端发送数据
func (c *ContextUdp) Write(operator string, body interface{}) (int, error) {
r, err := codec.NewCoder(c.config.ContentType)
if err != nil {
return 0, err
}
data, err := r.Encoder(body)
if err != nil {
return 0, err
}
p, err := NewPacket(crc32.ChecksumIEEE([]byte(operator)), 0, c.Response.Header, data, c.config.PluginForPacketSender)
if err != nil {
panic(err)
}
return c.Conn.WriteToUDP(p.Bytes(), c.remote)
}
func (c *ContextUdp) SetRequestProperty(key, value string) {
v := c.GetRequestProperty(key)
if v != "" {
c.Request.Header = bytes.Trim(c.Request.Header, key+"="+value+";")
}
c.Request.Header = append(c.Request.Header, []byte(key+"="+value+";")...)
}
func (c *ContextUdp) GetRequestProperty(key string) string {
values := strings.Split(string(c.Request.Header), ";")
for _, value := range values {
kv := strings.Split(value, "=")
if kv[0] == key {
return kv[1]
}
}
return ""
}
func (c *ContextUdp) SetResponseProperty(key, value string) {
v := c.GetResponseProperty(key)
if v != "" {
c.Response.Header = bytes.Trim(c.Response.Header, key+"="+value+";")
}
c.Response.Header = append(c.Response.Header, []byte(key+"="+value+";")...)
}
func (c *ContextUdp) GetResponseProperty(key string) string {
values := strings.Split(string(c.Response.Header), ";")
for _, value := range values {
kv := strings.Split(value, "=")
if kv[0] == key {
return kv[1]
}
}
return ""
}
func (c *ContextUdp) LocalAddr() string {
return c.Conn.LocalAddr().String()
}
func (c *ContextUdp) RemoteAddr() string {
return c.Conn.RemoteAddr().String()
}