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util.go
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/
util.go
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package pcsutil
import (
"compress/gzip"
"crypto/md5"
"flag"
"fmt"
"io"
"io/ioutil"
"net/http/cookiejar"
"net/url"
"os"
"strings"
"unsafe"
)
var (
// PipeInput 命令中是否为管道输入
PipeInput bool
)
func init() {
fileInfo, err := os.Stdin.Stat()
if err != nil {
return
}
PipeInput = (fileInfo.Mode() & os.ModeNamedPipe) == os.ModeNamedPipe
}
// ToString 将 []byte 转换为 string
func ToString(p []byte) string {
return *(*string)(unsafe.Pointer(&p))
}
// ToBytes 将 string 转换为 []byte
func ToBytes(str string) []byte {
return *(*[]byte)(unsafe.Pointer(&str))
}
// GetURLCookieString 返回cookie字串
func GetURLCookieString(urlString string, jar *cookiejar.Jar) string {
url, _ := url.Parse(urlString)
cookies := jar.Cookies(url)
cookieString := ""
for _, v := range cookies {
cookieString += v.String() + "; "
}
cookieString = strings.TrimRight(cookieString, "; ")
return cookieString
}
// Md5Encrypt 对 str 进行md5加密, 返回值为 str 加密后的密文
func Md5Encrypt(str interface{}) string {
md5Ctx := md5.New()
switch value := str.(type) {
case string:
md5Ctx.Write([]byte(str.(string)))
case *string:
md5Ctx.Write([]byte(*str.(*string)))
case []byte:
md5Ctx.Write(str.([]byte))
case *[]byte:
md5Ctx.Write(*str.(*[]byte))
default:
fmt.Println("MD5Encrypt: undefined type:", value)
return ""
}
return fmt.Sprintf("%X", md5Ctx.Sum(nil))
}
// DecompressGZIP 对 io.Reader 数据, 进行 gzip 解压
func DecompressGZIP(r io.Reader) ([]byte, error) {
gzipReader, err := gzip.NewReader(r)
if err != nil {
return nil, err
}
gzipReader.Close()
return ioutil.ReadAll(gzipReader)
}
// FlagProvided 检测命令行是否提供名为 name 的 flag, 支持多个name(names)
func FlagProvided(names ...string) bool {
if len(names) == 0 {
return false
}
var targetFlag *flag.Flag
for _, name := range names {
targetFlag = flag.Lookup(name)
if targetFlag == nil {
return false
}
if targetFlag.DefValue == targetFlag.Value.String() {
return false
}
}
return true
}