update

develop/dwz/init.go

@@ -2,7 +2,9 @@ package dwz
 
 import (
 	"fmt"
+	"math"
 	"net/http"
+	"strings"
 
 	"github.com/cdle/sillyGirl/core"
 	"github.com/gin-gonic/gin"
@@ -40,13 +42,41 @@ func getDwz(url string) string {
 		Url: url,
 	}
 	dwz.Create(su)
-	return dwz.Get("address", "https://4co.cc"+"/d"+fmt.Sprint(su.ID))
+	return dwz.Get("address", "https://4co.cc"+"/d"+encode(int64(su.ID)))
 }
 
 func getWz(id string) string {
 	su := &ShortUrl{
-		ID: core.Int(id),
+		ID: int(decode(id)),
 	}
 	dwz.First(su)
 	return fmt.Sprint(su.Url)
 }
+
+var chars string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+
+func encode(num int64) string {
+	bytes := []byte{}
+	for num > 0 {
+		bytes = append(bytes, chars[num%62])
+		num = num / 62
+	}
+	reverse(bytes)
+	return string(bytes)
+}
+
+func decode(str string) int64 {
+	var num int64
+	n := len(str)
+	for i := 0; i < n; i++ {
+		pos := strings.IndexByte(chars, str[i])
+		num += int64(math.Pow(62, float64(n-i-1)) * float64(pos))
+	}
+	return num
+}
+
+func reverse(a []byte) {
+	for left, right := 0, len(a)-1; left < right; left, right = left+1, right-1 {
+		a[left], a[right] = a[right], a[left]
+	}
+}