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help.go
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help.go
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package _189pc
import (
"bytes"
"crypto/aes"
"crypto/hmac"
"crypto/rand"
"crypto/rsa"
"crypto/sha1"
"crypto/x509"
"encoding/hex"
"encoding/pem"
"encoding/xml"
"fmt"
"math"
"net/http"
"regexp"
"strings"
"time"
"github.com/alist-org/alist/v3/pkg/utils/random"
)
func clientSuffix() map[string]string {
rand := random.Rand
return map[string]string{
"clientType": PC,
"version": VERSION,
"channelId": CHANNEL_ID,
"rand": fmt.Sprintf("%d_%d", rand.Int63n(1e5), rand.Int63n(1e10)),
}
}
// 带params的SignatureOfHmac HMAC签名
func signatureOfHmac(sessionSecret, sessionKey, operate, fullUrl, dateOfGmt, param string) string {
urlpath := regexp.MustCompile(`://[^/]+((/[^/\s?#]+)*)`).FindStringSubmatch(fullUrl)[1]
mac := hmac.New(sha1.New, []byte(sessionSecret))
data := fmt.Sprintf("SessionKey=%s&Operate=%s&RequestURI=%s&Date=%s", sessionKey, operate, urlpath, dateOfGmt)
if param != "" {
data += fmt.Sprintf("¶ms=%s", param)
}
mac.Write([]byte(data))
return strings.ToUpper(hex.EncodeToString(mac.Sum(nil)))
}
// RAS 加密用户名密码
func RsaEncrypt(publicKey, origData string) string {
block, _ := pem.Decode([]byte(publicKey))
pubInterface, _ := x509.ParsePKIXPublicKey(block.Bytes)
data, _ := rsa.EncryptPKCS1v15(rand.Reader, pubInterface.(*rsa.PublicKey), []byte(origData))
return strings.ToUpper(hex.EncodeToString(data))
}
// aes 加密params
func AesECBEncrypt(data, key string) string {
block, _ := aes.NewCipher([]byte(key))
paddingData := PKCS7Padding([]byte(data), block.BlockSize())
decrypted := make([]byte, len(paddingData))
size := block.BlockSize()
for src, dst := paddingData, decrypted; len(src) > 0; src, dst = src[size:], dst[size:] {
block.Encrypt(dst[:size], src[:size])
}
return strings.ToUpper(hex.EncodeToString(decrypted))
}
func PKCS7Padding(ciphertext []byte, blockSize int) []byte {
padding := blockSize - len(ciphertext)%blockSize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(ciphertext, padtext...)
}
// 获取http规范的时间
func getHttpDateStr() string {
return time.Now().UTC().Format(http.TimeFormat)
}
// 时间戳
func timestamp() int64 {
return time.Now().UTC().UnixNano() / 1e6
}
func MustParseTime(str string) *time.Time {
lastOpTime, _ := time.ParseInLocation("2006-01-02 15:04:05 -07", str+" +08", time.Local)
return &lastOpTime
}
type Time time.Time
func (t *Time) UnmarshalJSON(b []byte) error { return t.Unmarshal(b) }
func (t *Time) UnmarshalXML(e *xml.Decoder, ee xml.StartElement) error {
b, err := e.Token()
if err != nil {
return err
}
if b, ok := b.(xml.CharData); ok {
if err = t.Unmarshal(b); err != nil {
return err
}
}
return e.Skip()
}
func (t *Time) Unmarshal(b []byte) error {
bs := strings.Trim(string(b), "\"")
var v time.Time
var err error
for _, f := range []string{"2006-01-02 15:04:05 -07", "Jan 2, 2006 15:04:05 PM -07"} {
v, err = time.ParseInLocation(f, bs+" +08", time.Local)
if err == nil {
break
}
}
*t = Time(v)
return err
}
type String string
func (t *String) UnmarshalJSON(b []byte) error { return t.Unmarshal(b) }
func (t *String) UnmarshalXML(e *xml.Decoder, ee xml.StartElement) error {
b, err := e.Token()
if err != nil {
return err
}
if b, ok := b.(xml.CharData); ok {
if err = t.Unmarshal(b); err != nil {
return err
}
}
return e.Skip()
}
func (s *String) Unmarshal(b []byte) error {
*s = String(bytes.Trim(b, "\""))
return nil
}
func toFamilyOrderBy(o string) string {
switch o {
case "filename":
return "1"
case "filesize":
return "2"
case "lastOpTime":
return "3"
default:
return "1"
}
}
func toDesc(o string) string {
switch o {
case "desc":
return "true"
case "asc":
fallthrough
default:
return "false"
}
}
func ParseHttpHeader(str string) map[string]string {
header := make(map[string]string)
for _, value := range strings.Split(str, "&") {
if k, v, found := strings.Cut(value, "="); found {
header[k] = v
}
}
return header
}
func MustString(str string, err error) string {
return str
}
func BoolToNumber(b bool) int {
if b {
return 1
}
return 0
}
// 计算分片大小
// 对分片数量有限制
// 10MIB 20 MIB 999片
// 50MIB 60MIB 70MIB 80MIB ∞MIB 1999片
func partSize(size int64) int64 {
const DEFAULT = 1024 * 1024 * 10 // 10MIB
if size > DEFAULT*2*999 {
return int64(math.Max(math.Ceil((float64(size)/1999) /*=单个切片大小*/ /float64(DEFAULT)) /*=倍率*/, 5) * DEFAULT)
}
if size > DEFAULT*999 {
return DEFAULT * 2 // 20MIB
}
return DEFAULT
}