/
Handlers.go
231 lines (211 loc) · 5.36 KB
/
Handlers.go
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package main
import (
"encoding/binary"
"log"
"net/http"
"strconv"
"time"
"github.com/gorilla/mux"
bolt "go.etcd.io/bbolt"
)
var (
db *bolt.DB
devopdb *bolt.DB
edgedb *bolt.DB
placesdb *bolt.DB
masterdbpath, devopdbpath, edgedbpath, placesdbpath string
)
// GetDB is db getter.
func GetDB(nameof string) (db *bolt.DB) {
switch nameof {
case "master", "":
return db
case "devop":
return devopdb
case "edge":
return edgedb
case "places":
return placesdb
default:
log.Println("invalid db requested")
}
return nil
}
// string arg for da cattrack main to rid dis
func InitBoltDB(nameof, boltDb string) error {
log.Println("initing boltdb name=", nameof)
var err error
bopts := &bolt.Options{}
defer func() {
log.Println("boltdb-refresh/init: path=", boltDb, "name=", nameof)
}()
switch nameof {
case "master", "":
if db != nil {
log.Println("closing db=", nameof, boltDb)
db.Close()
log.Println("closed db=", nameof, boltDb)
bopts.ReadOnly = true
}
if boltDb == "" {
boltDb = masterdbpath
}
log.Println("opening", nameof, boltDb)
// db, err = bolt.Open(boltDb, 0660, bopts)
masterdbpath = boltDb
case "devop":
if devopdb != nil {
log.Println("closing db=", nameof, boltDb)
devopdb.Close()
log.Println("closed db=", nameof, boltDb)
bopts.ReadOnly = true
}
if boltDb == "" {
boltDb = devopdbpath
}
log.Println("opening", nameof, boltDb)
// devopdb, err = bolt.Open(boltDb, 0660, bopts)
devopdbpath = boltDb
case "edge":
if edgedb != nil {
log.Println("closing db=", nameof, boltDb)
edgedb.Close()
log.Println("closed db=", nameof, boltDb)
bopts.ReadOnly = true
}
if boltDb == "" {
boltDb = edgedbpath
}
log.Println("opening", nameof, boltDb)
// edgedb, err = bolt.Open(boltDb, 0660, bopts)
edgedbpath = boltDb
case "places":
if placesdb != nil {
log.Println("closing db=", nameof, boltDb)
placesdb.Close()
log.Println("closed db=", nameof, boltDb)
bopts.ReadOnly = true
}
if boltDb == "" {
boltDb = placesdbpath
}
log.Println("opening", nameof, boltDb)
// epathdgedb, err = bolt.Open(boltDb, 0660, bopts)
placesdbpath = boltDb
}
if err != nil {
log.Println("Could not initialize Bolt database. ", err)
} else {
log.Println("Bolt db is initialized at ", boltDb)
}
return err
}
func i32tob(v int32) []byte {
b := make([]byte, 8)
binary.BigEndian.PutUint32(b, uint32(v))
return b
}
// RefreshDB is probably completely useless b/c TilesBolty does same thing
func RefreshDB(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
vars := mux.Vars(r)
dbName := vars["db"]
log.Println("handling refreshdb db=", dbName)
if dbName == "" {
http.Error(w, "invalid db name", http.StatusBadRequest)
return
}
if err := InitBoltDB(dbName, ""); err != nil {
log.Println("err refresh/initdb", err)
}
w.Write([]byte("OK:" + dbName))
}
func TilesBolty(w http.ResponseWriter, r *http.Request) {
tpstart := time.Now()
defer log.Println("tb took", time.Since(tpstart))
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Content-Type", "application/x-protobuf")
w.Header().Set("Content-Encoding", "gzip") // set response header for encoding (browsers may do the ungzipping)
// https://github.com/SpatialServer/Leaflet.MapboxVectorTile/issues/29
vars := mux.Vars(r)
dbname := vars["db"]
z := vars["z"]
x := vars["x"]
y := vars["y"]
// dafuc
zoomLevel, e1 := strconv.ParseUint(z, 10, 32)
if e1 != nil {
log.Println(e1.Error())
}
// dafaq
colNum, e13 := strconv.ParseUint(x, 10, 32)
if e13 != nil {
log.Println(e13.Error())
}
rowNum, e2 := strconv.ParseUint(y, 10, 32)
if e2 != nil {
log.Println(e1.Error())
}
var qrow = (1 << zoomLevel) - 1 - rowNum
// tile data bytes for response
var tileData []byte
var dbp string
switch dbname {
case "master":
dbp = masterdbpath
case "devop":
dbp = devopdbpath
case "edge":
dbp = edgedbpath
case "places":
dbp = placesdbpath
default:
http.Error(w, "invalid db parameter", http.StatusBadRequest)
return
}
log.Println("TILEGET: db/z/x/y path", dbname, z, x, y, dbp)
// InitBoltDB(dbname, "") // dunno why
// db, err := bolt.Open(dbp, 0660, &bolt.Options{ReadOnly: true})
// db, err := bolt.Open(dbp, 0660, nil)
var err error
db = GetDB(dbname)
if db == nil {
log.Println("opendb", dbname)
db, err = bolt.Open(dbp, 0660, &bolt.Options{ReadOnly: true})
// http.Error(w, "invalid db parameter", http.StatusBadRequest)
// return
}
if db != nil {
defer db.Close()
}
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
e := db.View(func(tx *bolt.Tx) error {
bz := tx.Bucket(i32tob(int32(zoomLevel)))
if bz == nil { // these are the cases the map is requesting a tile that we haven't made :paw_prints: in yet
log.Println("E: bucket by zoom empty")
w.Write(nil)
return nil
}
bx := bz.Bucket(i32tob(int32(colNum)))
if bx == nil {
log.Println("E: bucket by col empty")
w.Write(nil)
return nil
}
n := i32tob(int32(qrow))
tileData = bx.Get(n)
return nil
})
if e != nil {
log.Println("getboltdb", e)
}
if tileData == nil {
log.Println("td war nil", z, x, y)
w.Write(nil)
return
}
w.Write(tileData)
}