package convert import ( "encoding/base64" "math/rand" "net/http" "strings" "github.com/gofrs/uuid" ) var hostsSuffix = []string{ "-cdn.aliyuncs.com", ".alicdn.com", ".pan.baidu.com", ".tbcache.com", ".aliyuncdn.com", ".vod.miguvideo.com", ".cibntv.net", ".myqcloud.com", ".smtcdns.com", ".alikunlun.com", ".smtcdns.net", ".apcdns.net", ".cdn-go.cn", ".cdntip.com", ".cdntips.com", ".alidayu.com", ".alidns.com", ".cdngslb.com", ".mxhichina.com", ".alibabadns.com", } var userAgents = []string{ "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.162 Safari/537.36", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36", "Mozilla/5.0 (Linux; Android 7.0; Moto C Build/NRD90M.059) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Mobile Safari/537.36", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36", "Mozilla/5.0 (Linux; Android 6.0.1; SM-G532M Build/MMB29T; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36", "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.101 Safari/537.36", "Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36", "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36", "Mozilla/5.0 (Linux; Android 5.1.1; SM-J120M Build/LMY47X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Mobile Safari/537.36", "Mozilla/5.0 (Windows NT 6.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36", "Mozilla/5.0 (Linux; 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Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.131 Safari/537.36", "Mozilla/5.0 (Linux; Android 6.0; vivo 1713 Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.124 Mobile Safari/537.36", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.89 Safari/537.36", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.101 Safari/537.36", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36", } var ( hostsLen = len(hostsSuffix) uaLen = len(userAgents) ) func RandHost() string { id, _ := uuid.NewV4() base := strings.ToLower(base64.RawURLEncoding.EncodeToString(id.Bytes())) base = strings.ReplaceAll(base, "-", "") base = strings.ReplaceAll(base, "_", "") buf := []byte(base) prefix := string(buf[:3]) + "---" prefix += string(buf[6:8]) + "-" prefix += string(buf[len(buf)-8:]) return prefix + hostsSuffix[rand.Intn(hostsLen)] } func RandUserAgent() string { return userAgents[rand.Intn(uaLen)] } func SetUserAgent(header http.Header) { if header.Get("User-Agent") != "" { return } userAgent := RandUserAgent() header.Set("User-Agent", userAgent) }