ZeroBot-Plugin/utils/file/updater.go
2021-12-25 13:39:41 +08:00

107 lines
2.6 KiB
Go
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package file
import (
"crypto/md5"
"encoding/hex"
"errors"
"io"
"net/http"
"os"
"sync"
"unsafe"
reg "github.com/fumiama/go-registry"
"github.com/sirupsen/logrus"
)
const (
dataurl = "https://gitcode.net/u011570312/zbpdata/-/raw/main/"
)
var (
registry = reg.NewRegReader("reilia.eastasia.azurecontainer.io:32664", "fumiama")
lzmu sync.Mutex
)
// GetLazyData 获取懒加载数据
func GetLazyData(path string, isReturnDataBytes, isDataMustEqual bool) ([]byte, error) {
var data []byte
var resp *http.Response
var filemd5 *[16]byte
var ms string
u := dataurl + path
lzmu.Lock()
logrus.Infoln("[file]检查懒加载文件:", path)
err := registry.Connect()
if err != nil {
logrus.Errorln("[file]无法连接到md5验证服务器请自行确保下载文件的正确性:", err)
} else {
ms, err = registry.Get(path)
if err != nil || len(ms) != 16 {
logrus.Errorln("[file]获取md5失败请自行确保下载文件", path, "的正确性:", err)
} else {
filemd5 = (*[16]byte)(*(*unsafe.Pointer)(unsafe.Pointer(&ms)))
logrus.Infoln("[file]从验证服务器获得文件md5:", hex.EncodeToString(filemd5[:]))
}
}
_ = registry.Close()
lzmu.Unlock()
if IsExist(path) {
data, err = os.ReadFile(path)
if err != nil {
return nil, err
}
if filemd5 != nil {
if md5.Sum(data) == *filemd5 {
logrus.Infoln("[file]文件md5匹配文件已存在且为最新")
goto ret
} else if !isDataMustEqual {
logrus.Warnln("[file]文件", path, "md5不匹配但不主动更新")
goto ret
}
logrus.Infoln("[file]文件md5不匹配开始更新文件")
} else {
logrus.Warnln("[file]文件", path, "存在已跳过md5检查")
goto ret
}
}
// 下载
resp, err = http.Get(u)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.ContentLength <= 0 {
return nil, errors.New("resp body len <= 0")
}
logrus.Printf("[file]从镜像下载数据%d字节...", resp.ContentLength)
// 读取数据
data, err = io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if len(data) == 0 {
return nil, errors.New("read body len <= 0")
}
if filemd5 != nil {
if md5.Sum(data) == *filemd5 {
logrus.Infoln("[file]文件下载完成md5匹配开始保存")
} else {
logrus.Errorln("[file]文件", path, "md5不匹配下载失败")
return nil, errors.New("file md5 mismatch")
}
} else {
logrus.Warnln("[file]文件", path, "下载完成已跳过md5检查开始保存")
}
// 写入数据
err = os.WriteFile(path, data, 0644)
ret:
if isReturnDataBytes {
return data, err
}
return nil, err
}