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websocket.go
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websocket.go
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// Package service
// Date: 2024/3/11 10:38
// Author: Amu
// Description:
package service
import (
"bufio"
"context"
"fmt"
"github.com/amuluze/amutool/docker"
"github.com/gofiber/contrib/websocket"
"log/slog"
"time"
)
type LoggerHandler struct {
manager *docker.Manager
}
func NewLoggerHandler() *LoggerHandler {
manager, err := docker.NewManager()
if err != nil {
return nil
}
return &LoggerHandler{manager: manager}
}
func (l *LoggerHandler) Handler(c *websocket.Conn) {
fmt.Println("websocket handler")
containerId := c.Params("id")
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
reader, err := l.manager.ContainerLogs(ctx, containerId)
if err != nil {
return
}
scanner := bufio.NewScanner(reader)
for {
mt, msg, err := c.ReadMessage()
if err != nil {
slog.Error("read websocket message error", "err", err)
_ = c.WriteMessage(mt, []byte("bad message"))
break
}
slog.Info("receive websocket message", "msg", string(msg))
for scanner.Scan() {
// scanner.Bytes() 前有 8 个字节的 the HEADER part,需要忽略掉
// https://medium.com/@dhanushgopinath/reading-docker-container-logs-with-golang-docker-engine-api-702233fac044
if err = c.WriteMessage(mt, scanner.Bytes()[8:]); err != nil {
continue
}
}
}
}