37 lines
851 B
Go
37 lines
851 B
Go
package rwgps
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
)
|
|
|
|
type ErrNotFound struct {
|
|
RouteId int
|
|
}
|
|
|
|
func (e *ErrNotFound) Error() string {
|
|
return fmt.Sprintf("RideWithGPS track %d not found", e.RouteId)
|
|
}
|
|
|
|
func FetchTrack(routeId int) ([]byte, error) {
|
|
url := fmt.Sprintf("https://ridewithgps.com/routes/%d.gpx?sub_format=track", routeId)
|
|
resp, err := http.Get(url)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error getting %s: %v", url, err)
|
|
}
|
|
defer resp.Body.Close()
|
|
data, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error reading response from %s: %v", url, err)
|
|
}
|
|
if IsNotFound(data) {
|
|
return nil, &ErrNotFound{routeId}
|
|
}
|
|
return data, nil
|
|
}
|
|
|
|
func IsNotFound(data []byte) bool {
|
|
return bytes.HasPrefix(data, []byte("<!DOCTYPE html>")) && bytes.Contains(data, []byte("Error (404 not found)"))
|
|
}
|