mirror of
https://github.com/Luzifer/staticmap.git
synced 2024-12-20 21:01:18 +00:00
23 lines
563 B
Go
23 lines
563 B
Go
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/sha256"
|
||
|
|
"fmt"
|
||
|
|
"io"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"github.com/golang/geo/s2"
|
||
|
|
)
|
||
|
|
|
||
|
|
type cacheFunction func(center s2.LatLng, zoom int, marker []marker, x, y int) (io.ReadCloser, error)
|
||
|
|
|
||
|
|
func cacheKeyHelper(center s2.LatLng, zoom int, marker []marker, x, y int) string {
|
||
|
|
markerString := []string{}
|
||
|
|
for _, m := range marker {
|
||
|
|
markerString = append(markerString, m.String())
|
||
|
|
}
|
||
|
|
hashString := fmt.Sprintf("%s|%d|%s|%dx%d", center.String(), zoom, strings.Join(markerString, "+"), x, y)
|
||
|
|
|
||
|
|
return fmt.Sprintf("%x", sha256.Sum256([]byte(hashString)))
|
||
|
|
}
|