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