go-http-leaflet-geotag

Go HTTP middleware for the Leaflet.GeotagPhoto plugin.

Important

Documentation is incomplete.

Example

$> go run -mod vendor cmd/example/main.go 
2020/04/06 11:28:37 Listening for requests on localhost:8080

An abbreviated code example

This is an abbreviated example of code to demonstrate appending Leaflet.GeotagPhoto related handlers to an http.ServeMux instance and updating a user-defined http.Handler to append Leaflet.GeotagPhoto Javascript and CSS links to its output.

Error handling has been removed for the sake of brevity.

import (
	"github.com/sfomuseum/go-http-leaflet-geotag"
	"net/http"
)

func main() {

	// code...
     	
	geotag_opts := geotag.DefaultLeafletGeotagOptions()
	
	mux := http.NewServeMux()

	geotag.AppendAssetHandlers(mux)

	camera_handler, _ := PageHandler(t, "camera")

	camera_handler = geotag.AppendResourcesHandler(camera_handler, geotag_opts)

	mux.Handle("/camera/", camera_handler)

	// code...
}	

For a complete example please consult cmd/example/main.go. The (Javascript) code for the web application itself is contained in the HTML files in the templates/html directory.

Changes

Leaflet.GeotagPhoto.js

This package uses a modified version of the Leaflet.GeotagPhoto.js file that is part of the original Leaflet.GeotagPhoto. It encodes all the static assets (icons and markers) as base64-encoded data URIs rather than linking to the resources themselves. This is to account for situations where an application may be run inside or behind one or more load balancers or proxies and where keeping track of URL rewriting rules becomes a burden.

See also

• https://github.com/sfomuseum/Leaflet.GeotagPhoto
• https://github.com/aaronland/go-http-leaflet