MaysWind
98 lines
4.1 KiB
Go
98 lines
4.1 KiB
Go
package api
|
|
|
|
import (
|
|
"net/http"
|
|
"net/http/httputil"
|
|
"net/url"
|
|
"strings"
|
|
|
|
"github.com/mayswind/ezbookkeeping/pkg/core"
|
|
"github.com/mayswind/ezbookkeeping/pkg/errs"
|
|
"github.com/mayswind/ezbookkeeping/pkg/settings"
|
|
"github.com/mayswind/ezbookkeeping/pkg/utils"
|
|
)
|
|
|
|
const openStreetMapTileImageUrlFormat = "https://tile.openstreetmap.org/{z}/{x}/{y}.png" // https://tile.openstreetmap.org/{z}/{x}/{y}.png
|
|
const openStreetMapHumanitarianStyleTileImageUrlFormat = "https://a.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png" // https://{s}.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png
|
|
const openTopoMapTileImageUrlFormat = "https://tile.opentopomap.org/{z}/{x}/{y}.png" // https://tile.opentopomap.org/{z}/{x}/{y}.png
|
|
const opnvKarteMapTileImageUrlFormat = "https://tileserver.memomaps.de/tilegen/{z}/{x}/{y}.png" // https://tileserver.memomaps.de/tilegen/{z}/{x}/{y}.png
|
|
const cyclOSMMapTileImageUrlFormat = "https://a.tile-cyclosm.openstreetmap.fr/cyclosm/{z}/{x}/{y}.png" // https://{s}.tile-cyclosm.openstreetmap.fr/cyclosm/{z}/{x}/{y}.png
|
|
const cartoDBMapTileImageUrlFormat = "https://a.basemaps.cartocdn.com/rastertiles/voyager/{z}/{x}/{y}{scale}.png" // https://{s}.basemaps.cartocdn.com/{style}/{z}/{x}/{y}{scale}.png
|
|
const tomtomMapTileImageUrlFormat = "https://api.tomtom.com/map/1/tile/basic/main/{z}/{x}/{y}.png" // https://api.tomtom.com/map/{versionNumber}/tile/{layer}/{style}/{z}/{x}/{y}.png?key={key}&language={language}
|
|
|
|
// MapImageProxy represents map image proxy
|
|
type MapImageProxy struct {
|
|
}
|
|
|
|
// Initialize a map image proxy singleton instance
|
|
var (
|
|
MapImages = &MapImageProxy{}
|
|
)
|
|
|
|
// MapTileImageProxyHandler returns map tile image
|
|
func (p *MapImageProxy) MapTileImageProxyHandler(c *core.Context) (*httputil.ReverseProxy, *errs.Error) {
|
|
mapProvider := strings.Replace(c.Query("provider"), "-", "_", -1)
|
|
targetUrl := ""
|
|
|
|
if mapProvider != settings.Container.Current.MapProvider {
|
|
return nil, errs.ErrMapProviderNotCurrent
|
|
}
|
|
|
|
zoomLevel := c.Param("zoomLevel")
|
|
coordinateX := c.Param("coordinateX")
|
|
fileName := c.Param("fileName")
|
|
fileNameParts := strings.Split(fileName, ".")
|
|
coordinateY := fileNameParts[0]
|
|
scale := c.Query("scale")
|
|
|
|
if len(fileNameParts) != 2 || fileNameParts[len(fileNameParts)-1] != "png" {
|
|
return nil, errs.ErrImageExtensionNotSupported
|
|
}
|
|
|
|
if mapProvider == settings.OpenStreetMapProvider {
|
|
targetUrl = openStreetMapTileImageUrlFormat
|
|
} else if mapProvider == settings.OpenStreetMapHumanitarianStyleProvider {
|
|
targetUrl = openStreetMapHumanitarianStyleTileImageUrlFormat
|
|
} else if mapProvider == settings.OpenTopoMapProvider {
|
|
targetUrl = openTopoMapTileImageUrlFormat
|
|
} else if mapProvider == settings.OPNVKarteMapProvider {
|
|
targetUrl = opnvKarteMapTileImageUrlFormat
|
|
} else if mapProvider == settings.CyclOSMMapProvider {
|
|
targetUrl = cyclOSMMapTileImageUrlFormat
|
|
} else if mapProvider == settings.CartoDBMapProvider {
|
|
targetUrl = cartoDBMapTileImageUrlFormat
|
|
} else if mapProvider == settings.TomTomMapProvider {
|
|
targetUrl = tomtomMapTileImageUrlFormat + "?key=" + settings.Container.Current.TomTomMapAPIKey
|
|
language := c.Query("language")
|
|
|
|
if language != "" {
|
|
targetUrl = targetUrl + "&language=" + language
|
|
}
|
|
} else if mapProvider == settings.CustomProvider {
|
|
targetUrl = settings.Container.Current.CustomMapTileServerUrl
|
|
} else {
|
|
return nil, errs.ErrParameterInvalid
|
|
}
|
|
|
|
transport := http.DefaultTransport.(*http.Transport).Clone()
|
|
utils.SetProxyUrl(transport, settings.Container.Current.MapProxy)
|
|
|
|
director := func(req *http.Request) {
|
|
imageRawUrl := targetUrl
|
|
imageRawUrl = strings.Replace(imageRawUrl, "{z}", zoomLevel, -1)
|
|
imageRawUrl = strings.Replace(imageRawUrl, "{x}", coordinateX, -1)
|
|
imageRawUrl = strings.Replace(imageRawUrl, "{y}", coordinateY, -1)
|
|
imageRawUrl = strings.Replace(imageRawUrl, "{scale}", scale, -1)
|
|
imageUrl, _ := url.Parse(imageRawUrl)
|
|
|
|
req.URL = imageUrl
|
|
req.RequestURI = req.URL.RequestURI()
|
|
req.Host = imageUrl.Host
|
|
}
|
|
|
|
return &httputil.ReverseProxy{
|
|
Transport: transport,
|
|
Director: director,
|
|
}, nil
|
|
}
|