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slippytiles.go
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/
slippytiles.go
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package slippytiles
import (
"encoding/json"
"github.com/jtacoma/uritemplates"
"io/ioutil"
"net/http"
)
type Config struct {
Cache CacheConfig
Layers LayersConfig
}
type CacheConfig struct {
Name string
Path string
}
type LayersConfig map[string]LayerConfig
type LayerConfig struct {
URL string
Formats []string
}
func (l LayerConfig) URITemplate() (*uritemplates.UriTemplate, error) {
template, err := uritemplates.Parse(l.URL)
return template, err
}
type Cache interface {
Get(string) ([]byte, error)
Set(string, []byte) error
Unset(string) error
}
type Provider interface {
Handler(http.Handler) http.Handler
Cache() Cache
}
func NewConfigFromFile(file string) (*Config, error) {
body, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
c := Config{}
err = json.Unmarshal(body, &c)
if err != nil {
return nil, err
}
return &c, nil
}