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/* Vuls - Vulnerability Scanner
Copyright (C) 2016 Future Corporation , Japan.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package util
import (
"fmt"
"net"
"net/url"
"strings"
"github.com/future-architect/vuls/config"
)
// GenWorkers generates goroutine
// http://qiita.com/na-o-ys/items/65373132b1c5bc973cca
func GenWorkers(num int) chan<- func() {
tasks := make(chan func())
for i := 0; i < num; i++ {
go func() {
defer func() {
if p := recover(); p != nil {
log := NewCustomLogger(config.ServerInfo{})
log.Errorf("run time panic: %v", p)
}
}()
for f := range tasks {
f()
}
}()
}
return tasks
}
// AppendIfMissing append to the slice if missing
func AppendIfMissing(slice []string, s string) []string {
for _, ele := range slice {
if ele == s {
return slice
}
}
return append(slice, s)
}
// URLPathJoin make URL
func URLPathJoin(baseURL string, paths ...string) (string, error) {
baseURL = strings.TrimSuffix(baseURL, "/")
trimedPaths := []string{}
for _, path := range paths {
trimed := strings.Trim(path, " /")
if len(trimed) != 0 {
trimedPaths = append(trimedPaths, trimed)
}
}
var url *url.URL
url, err := url.Parse(baseURL)
if err != nil {
return "", err
}
url.Path += "/" + strings.Join(trimedPaths, "/")
return url.String(), nil
}
// URLPathParamJoin make URL
func URLPathParamJoin(baseURL string, paths []string, params map[string]string) (string, error) {
urlPath, err := URLPathJoin(baseURL, paths...)
if err != nil {
return "", err
}
u, err := url.Parse(urlPath)
if err != nil {
return "", err
}
parameters := url.Values{}
for key := range params {
parameters.Add(key, params[key])
}
u.RawQuery = parameters.Encode()
return u.String(), nil
}
// IP returns scanner network ip addresses
func IP() (ipv4Addrs []string, ipv6Addrs []string, err error) {
ifaces, err := net.Interfaces()
if err != nil {
return nil, nil, err
}
for _, i := range ifaces {
addrs, _ := i.Addrs()
for _, addr := range addrs {
var ip net.IP
switch v := addr.(type) {
case *net.IPNet:
ip = v.IP
case *net.IPAddr:
ip = v.IP
}
// only global unicast address
if !ip.IsGlobalUnicast() {
continue
}
if ok := ip.To4(); ok != nil {
ipv4Addrs = append(ipv4Addrs, ip.String())
} else {
ipv6Addrs = append(ipv6Addrs, ip.String())
}
}
}
return ipv4Addrs, ipv6Addrs, nil
}
// ProxyEnv returns shell environment variables to set proxy
func ProxyEnv() string {
httpProxyEnv := ""
keys := []string{
"http_proxy",
"https_proxy",
"HTTP_PROXY",
"HTTPS_PROXY",
}
for _, key := range keys {
httpProxyEnv += fmt.Sprintf(
` %s="%s"`, key, config.Conf.HTTPProxy)
}
return httpProxyEnv
}
// PrependProxyEnv prepends proxy environment variable
func PrependProxyEnv(cmd string) string {
if len(config.Conf.HTTPProxy) == 0 {
return cmd
}
return fmt.Sprintf("%s %s", ProxyEnv(), cmd)
}
// func unixtime(s string) (time.Time, error) {
// i, err := strconv.ParseInt(s, 10, 64)
// if err != nil {
// return time.Time{}, err
// }
// return time.Unix(i, 0), nil
// }
// Truncate truncates string to the length
func Truncate(str string, length int) string {
if length < 0 {
return str
}
if length <= len(str) {
return str[:length]
}
return str
}
// Distinct a slice
func Distinct(ss []string) (distincted []string) {
m := map[string]bool{}
for _, s := range ss {
if _, found := m[s]; !found {
m[s] = true
distincted = append(distincted, s)
}
}
return
}
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