用go语言通过FTP库实现web日库自动上传归档

因为平时管理的web服务器都是VM服务器，为节省硬盘空间，一般给虚拟机分配的硬盘空间都比较小，只有8G，因为，保存不了多少日志，所以每天都需要把每台WEB日志转移到一个硬盘比较大的服务器上，然后再使用NBU集中备份，本程序主要使用go语言实现实现将web日志通过FTP自动上传FTP服务器，使用了filepath.Walk遍历日志目录及第三方纯go库“github.com/jlaffaye/ftp”，而日志VM本地存储路径格式是 /var/log/weblog/www.domainName.com/month/20140616.access.log，

ftp库下载地址

http://godoc.org/github.com/jlaffaye/ftp#ServerConn.Stor

// uploadlog

/*

1.本程序主要是实现linux下上传web日志使用，

2.使用方法是 uploadlog logfile_dir

程序只上传当前时间点的日志文件，

*/

package main

import (

    "fmt"

    ftp "github.com/jlaffaye/ftp"

    "log"

    "net"

    "os"

    "path/filepath"

    "strconv"

    "strings"

    "time"

)

func main() {

    fmt.Println("Hello World!")

    if len(os.Args) != 2 {

        log.Fatal("Usage:" + filepath.Base(os.Args[0]) + " log_dir ")

        os.Exit(1)

    }

    //logFileName是将要分析的日志

    logFileName, _, _ := getLogFileName()

    serverIp := getLocalIpAddr()

    //serverName, _ := os.Hostname()

    time.Sleep(time.Duration(90) * time.Second)

    dir := os.Args[1]

    filepath.Walk(dir, func(path string, f os.FileInfo, err error) error {

        if f == nil {

            return err

        }

        if f.IsDir() {

            return nil

        }

        if f.Name() == logFileName {

            fmt.Println(path)

            //pathFields的作用是将日志path解析成一个数据，从而可以得到日志的域名,注意，如果是linux系统，要用“/”

            pathFields := strings.Split(path, "\")

            var domainName string

            if len(pathFields) > 3 {

                domainName = pathFields[len(pathFields)-3]

            }

            fmt.Println(time.Now())

            ftpUploadFile("ftp-server-ip:21", "ftpUserName", "ftpPassword", path, domainName, serverIp+"_"+logFileName)

            fmt.Println(time.Now())

        }

        return nil

    })

}

func getLogFileName() (string, string, string) {

    MonthTOstr := map[string]string{"January": "01",

        "February": "02",

        "March": "03",

        "April": "04",

        "May": "05",

        "June": "06",

        "July": "07",

        "August": "08",

        "September": "09",

        "October": "10",

        "November": "11",

        "December": "12"}

    timenow := time.Now()

    year, month, day := timenow.Date()

    //monthStr := month.String()

    hour, _, _ := timenow.Clock()

    yearStr := strings.TrimLeft(strconv.Itoa(year), "20") //去掉前面的四位数年份如"2014"年的“20”

    dayStr, hourStr := strconv.Itoa(day), strconv.Itoa(hour)

    if day < 10 {

        dayStr = "0" + dayStr

    }

    if hour < 10 {

        hourStr = "0" + hourStr

    }

    fileName := "ex" + yearStr + MonthTOstr[month.String()] + dayStr + hourStr + ".log"

    logDay := yearStr + MonthTOstr[month.String()] + dayStr

    logMonth := yearStr + MonthTOstr[month.String()]

    //monthSrt := strconv.Itoa(timenow.Month())

    //fmt.Println(fileName, logDay)

    return fileName, logDay, logMonth

    //fmt.Println(fileName)

}

func getLocalIpAddr() string {

    //这里使用一个合法的IP就行了，端口随便，即使没有打开也行，也许因为使用UDP，如果用TCP的话，对端不打开就会有问题

    conn, err := net.Dial("udp", "192.168.8.51:80")

    if err != nil {

        //fmt.Println(err.Error())

        return "127.0.0.1"

    }

    defer conn.Close()

    //fmt.Println(conn.LocalAddr().String())

    //conn.

    //fmt.Println(strings.Split(conn.LocalAddr().String(), ":")[0])

    return strings.Split(conn.LocalAddr().String(), ":")[0]

}

func ftpUploadFile(ftpserver, ftpuser, pw, localFile, remoteSavePath, saveName string) {

    ftp, err := ftp.Connect(ftpserver)

    if err != nil {

        fmt.Println(err)

    }

    err = ftp.Login(ftpuser, pw)

    if err != nil {

        fmt.Println(err)

    }

    //注意是 pub/log，不能带“/”开头

    ftp.ChangeDir("pub/log")

    dir, err := ftp.CurrentDir()

    fmt.Println(dir)

    ftp.MakeDir(remoteSavePath)

    ftp.ChangeDir(remoteSavePath)

    dir, _ = ftp.CurrentDir()

    fmt.Println(dir)

    file, err := os.Open(localFile)

    if err != nil {

        fmt.Println(err)

    }

    defer file.Close()

    err = ftp.Stor(saveName, file)

    if err != nil {

        fmt.Println(err)

    }

    ftp.Logout()

    ftp.Quit()

    fmt.Println("success upload file:", localFile)

}