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package main
import (
"bytes"
"crypto/md5"
"encoding/gob"
"errors"
"fmt"
"github.com/garyburd/redigo/redis"
"golang.org/x/crypto/bcrypt"
"io"
"io/ioutil"
"log"
"math/rand"
"net/http"
"os"
"time"
)
/*
type errorString struct {
s string
}
func (e *errorString) Error() string {
return e.s
}
// New returns an error that formats as the given text.
func New(text string) error {
return &errorString{text}
}
*/
// Returns headers as map and the content of a webpage as string
func HttpGet(url string) (*http.Response, string, error) {
r, err := http.Get(url)
if err != nil {
return r, "Get request failed.", err
}
defer r.Body.Close()
contents, err := ioutil.ReadAll(r.Body)
if err != nil {
return r, "Reading body failed.", err
}
return r, string(contents), nil
}
// Hashs and returns a string (md5)
func Md5Hash(content string) string {
h := md5.New()
io.WriteString(h, content)
hash := fmt.Sprintf("%x", h.Sum(nil))
return hash
}
// Creates a random string
func RandomKey() string {
letters := []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
key := make([]rune, 40)
for i := range key {
key[i] = letters[rand.Intn(len(letters))]
}
return string(key)
}
var pool = newPool()
// Creates a pool with connections to Redis
func newPool() *redis.Pool {
return &redis.Pool{
MaxIdle: 3,
IdleTimeout: 240 * time.Second,
Dial: func() (redis.Conn, error) {
redis_server := os.Getenv("STATUS_REDIS_SERVER")
redis_port := os.Getenv("STATUS_REDIS_PORT")
c, err := redis.Dial("tcp", redis_server+":"+redis_port)
if err != nil {
return nil, err
}
return c, err
},
TestOnBorrow: func(c redis.Conn, t time.Time) error {
_, err := c.Do("PING")
return err
},
}
}
// Hashs password with bcrypt and returns the string
func HashPassword(password string) (string, error) {
if password == "" {
return "", errors.New("Empty password.")
}
p := []byte(password)
hash, err := bcrypt.GenerateFromPassword(p, 10)
if err != nil {
return "", err
}
return string(hash), nil
}
// Verify password and hash
func VerifyPassword(password, hash string) bool {
if hash == "" || password == "" {
return false
}
err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
if err != nil {
log.Printf("%s \n", err)
return false
}
return true
}
func GetBytes(key interface{}) ([]byte, error) {
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
err := enc.Encode(key)
if err != nil {
return nil, err
}
return buf.Bytes(), nil
}
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