// This is pulled out so that get_tile & get_raw_tile endpoitn can use the same code
func getTileHandler(ctx *dig.RequestContext) (tile interface{}, err *dig.CodedError) {
params := ctx.Params
x := params["x"].GetInt()
y := params["y"].GetInt()
z := params["z"].GetInt()
slug := params["tileset"].GetString()
xyz := TileXYZ{Tileset: slug, X: x, Y: y, Z: z}
tile, tserr := tilesets.Read(xyz)
if tserr != nil {
err = dig.Cerrorf(500, tserr.Error())
}
return
}
func (s *tileSubscription) notify(conn *dig.Connection) {
//TODO ops will have specific tile in the future?
for xyz := range s.tiles {
var msg *dig.ResponseMessage
if tile, err := tilesets.Read(xyz); err != nil {
check(err)
msg = dig.Cerrorf(dig.RpcInvalidRequest, err.Error()).ResponseMessage()
} else {
tile.Data = nil
tile.Y = (1<<uint(tile.Z) - 1) - tile.Y
id := sprintf("%d:%d:%d", tile.Z, tile.X, tile.Y)
msg = dig.RespondMsg(id, tile)
}
conn.Respond(msg)
}
}
func MBTServer(mbtPath string, port string) (app *dig.App, err error) {
tilesets, err = ReadTilesets(mbtPath)
if err != nil {
return
}
info("Serving tiles from %s", mbtPath)
hub = NewHub(tilesets)
go hub.listen()
app = dig.NewApp("Diglet")
app.Port = port
app.Prefix = "/tileset"
app.Methods = []dig.Method{
{
Name: "gallery",
Route: "/gallery/{tileset}",
Params: dig.MethodParams{
"tileset": {Validator: assertString, Help: "Tileset to query for metadata"},
},
Handler: func(ctx *dig.RequestContext) (t interface{}, err *dig.CodedError) {
template := resources.Static_html()
static, errp := ctx.Render(template)
warn(errp, "params?")
//panic(errp)
w := ctx.HTTPWriter
w.Write([]byte(static))
return
},
Help: "A simple tile viewer gallery app.\n" +
"?lat={}&lon={}&zoom={} can be included to zoom tolocation",
},
{
Name: GetTile,
Params: dig.MethodParams{
"tileset": {Validator: assertString, Help: "Tileset to read from"},
"x": {Validator: assertNumber, Help: "E/W Coordinate"},
"y": {Validator: assertNumber, Help: "N/S Cooredinate"},
"z": {Validator: assertNumber, Help: "Zoom level Coordinate"},
},
Handler: getTileHandler,
Help: "Retrieve a tile, the response's data field will be binary of the contents",
},
{
Name: ListTilesets,
Route: "/",
Params: dig.MethodParams{},
Handler: func(ctx *dig.RequestContext) (tile interface{}, err *dig.CodedError) {
dict := make(map[string]map[string]string)
for name, ts := range tilesets.Tilesets {
dict[name] = ts.Metadata().Attributes()
}
return dict, nil
},
Help: "List all of the tilesets available, including their metadata",
},
{
Name: GetTileset,
Route: "/{tileset}",
Params: dig.MethodParams{
"tileset": {Validator: assertString, Help: "Tileset to query for metadata"},
},
Handler: func(ctx *dig.RequestContext) (attrs interface{}, err *dig.CodedError) {
params := ctx.Params
slug := params["tileset"].GetString()
if ts, ok := tilesets.Tilesets[slug]; ok {
attrs = ts.Metadata().Attributes()
} else {
err = dig.Cerrorf(dig.RpcInvalidRequest, "No tileset named %s", slug)
}
return
},
Help: "Query for the tilesets metadata, all values are string representations",
},
{
Name: SubscribeTile,
Params: dig.MethodParams{
"tileset": {Validator: assertString, Help: "Tileset to subscribe to"},
"x": {Validator: assertNumber, Help: "E/W Coordinate"},
"y": {Validator: assertNumber, Help: "N/S Cooredinate"},
"z": {Validator: assertNumber, Help: "Zoom level Coordinate"},
},
Handler: func(ctx *dig.RequestContext) (res interface{}, err *dig.CodedError) {
params := ctx.Params
x := params["x"].GetInt()
y := params["y"].GetInt()
z := params["z"].GetInt()
slug := params["tileset"].GetString()
if _, ok := tilesets.Tilesets[slug]; !ok {
err = dig.Cerrorf(dig.RpcInvalidRequest, "Cannot find tileset %s", slug)
} else {
xyz := TileXYZ{Tileset: slug, X: x, Y: y, Z: z}
if e := hub.bindTile(ctx, xyz); err != nil {
err = dig.Cerrorf(dig.RpcInvalidRequest, e.Error())
} else {
// might need to make this a notifucation instead
// -> no msg.Id
res = sprintf("Subscribed to tile %s", xyz)
}
}
return
},
Help: "Subscribe to changes on a specific tile, changes will be pushd with the same request id",
},
{
Name: UnsubscribeTile,
Params: dig.MethodParams{
"tileset": {Validator: assertString, Help: "Tileset to subscribe to"},
"x": {Validator: assertNumber, Help: "E/W Coordinate"},
"y": {Validator: assertNumber, Help: "N/S Cooredinate"},
"z": {Validator: assertNumber, Help: "Zoom level Coordinate"},
},
Handler: func(ctx *dig.RequestContext) (res interface{}, err *dig.CodedError) {
params := ctx.Params
x := params["x"].GetInt()
y := params["y"].GetInt()
z := params["z"].GetInt()
slug := params["tileset"].GetString()
if _, ok := tilesets.Tilesets[slug]; !ok {
err = dig.Cerrorf(dig.RpcInvalidRequest, "Cannot find tileset %s", slug)
} else {
xyz := TileXYZ{Tileset: slug, X: x, Y: y, Z: z}
hub.unbindTile(ctx, xyz)
res = sprintf("Unsubscribed from tile %s", xyz)
}
return
},
Help: "Unsubscribe from a tile",
},
{
Name: GetRawTile,
Route: "/{tileset}/{z}/{x}/{y}",
Params: dig.MethodParams{
"tileset": {Validator: assertString, Help: "Tileset to subscribe to"},
"x": {Validator: assertNumber, Help: "E/W Coordinate"},
"y": {Validator: assertNumber, Help: "N/S Cooredinate"},
"z": {Validator: assertNumber, Help: "Zoom level Coordinate"},
},
Handler: func(ctx *dig.RequestContext) (otile interface{}, err *dig.CodedError) {
itile, err := getTileHandler(ctx)
if err != nil {
return
}
r := ctx.HTTPReader
w := ctx.HTTPWriter
if tile, terr := castTile(itile); err != nil {
errorlog(terr)
terr = dig.Cerrorf(500, "Internal Error casting tile contents")
} else {
if dojson := r.URL.Query().Get("json"); toLower(dojson) == "true" {
otile = tile
return
}
//TODO roll sniff encoding into tile object?
headers := formatEncoding[tile.SniffFormat()]
for _, h := range headers {
w.Header().Set(h.key, h.value)
}
w.Header().Set("Content-Length", sprintSizeOf(tile.Data))
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Write(tile.Data)
}
return
},
Help: "Gets a tile and only writes it's raw contents. Used for hosting static tiles.",
},
}
return
}