mirror of
https://bitbucket.org/s_l_teichmann/mtsatellite
synced 2024-12-23 16:50:18 +01:00
Regenerate base tiles when db signals changes. TODO remove duplicate code from mtseeder.
This commit is contained in:
Sascha L. Teichmann
parent
3f13738d41
commit
e899b13889
@ -10,17 +10,21 @@ import (
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"log"
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"net/http"
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"bitbucket.org/s_l_teichmann/mtredisalize/common"
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"github.com/gorilla/mux"
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)
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func main() {
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var (
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webPort int
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webHost string
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webDir string
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mapDir string
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redisPort int
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redisHost string
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webPort int
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webHost string
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webDir string
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mapDir string
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redisPort int
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redisHost string
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colorsFile string
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workers int
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)
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flag.IntVar(&webPort, "web-port", 8808, "port of the web server")
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flag.IntVar(&webPort, "p", 8808, "port of the web server (shorthand)")
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@ -34,6 +38,9 @@ func main() {
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flag.StringVar(&redisHost, "rh", "", "address of the backend Redis server (shorthand)")
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flag.IntVar(&redisPort, "redis-port", 6379, "port of the backend Redis server")
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flag.IntVar(&redisPort, "rp", 6379, "port of the backend Redis server (shorthand)")
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flag.IntVar(&workers, "workers", 1, "number of workers to render tiles")
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flag.StringVar(&colorsFile, "colors", "colors.txt", "colors used to render map tiles.")
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flag.StringVar(&colorsFile, "c", "colors.txt", "colors used to render map tiles (shorthand).")
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flag.Parse()
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@ -43,8 +50,17 @@ func main() {
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router.Path("/map/{z:[0-9]+}/{x:[0-9]+}/{y:[0-9]+}.png").Handler(subBaseLine)
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if redisHost != "" {
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tileUpdater := newTileUpdater(mapDir, redisHost, redisPort)
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router.Path("/update").Methods("POST").Handler(tileUpdater)
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var colors *common.Colors
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var err error
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if colors, err = common.ParseColors(colorsFile); err != nil {
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log.Fatalf("ERROR: problem loading colors: %s", err)
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}
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redisAddress := fmt.Sprintf("%s:%d", redisHost, redisPort)
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tu := newTileUpdater(mapDir, redisAddress, colors, workers)
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if err = tu.doUpdates(); err != nil {
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log.Fatalf("ERROR: Cannot start tile generation: %s", err)
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}
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router.Path("/update").Methods("POST").Handler(tu)
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}
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router.PathPrefix("/").Handler(http.FileServer(http.Dir(webDir)))
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@ -14,6 +14,7 @@ import (
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"os"
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"path/filepath"
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"strconv"
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"time"
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"bitbucket.org/s_l_teichmann/mtredisalize/common"
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"github.com/gorilla/mux"
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@ -35,8 +36,10 @@ func (sb *subBaseLine) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
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x, y, z := toUint(xs), toUint(ys), toUint(zs)
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if z < 9 {
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filename := fmt.Sprintf("%d/%d/%d.png", z, x, y)
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http.ServeFile(rw, r, filepath.Join(sb.mapDir, filename))
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http.ServeFile(rw, r, filepath.Join(sb.mapDir,
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strconv.Itoa(int(z)),
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strconv.Itoa(int(x)),
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fmt.Sprintf("%d.png", y)))
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return
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}
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@ -46,20 +49,24 @@ func (sb *subBaseLine) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
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tx := x >> (z - 8)
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ty := y >> (z - 8)
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baseTile := filepath.Join(sb.mapDir, fmt.Sprintf("8/%d/%d.png", tx, ty))
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baseTile := filepath.Join(
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sb.mapDir, "8", strconv.Itoa(int(tx)), fmt.Sprintf("%d.png", ty))
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rw.Header().Set("Cache-Control", "private, max-age=0, no-cache")
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var etag string
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var err error
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var fi os.FileInfo
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if fi, err = os.Stat(baseTile); err != nil {
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http.NotFound(rw, r)
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return
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}
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if ifNoneMatch := r.Header.Get("If-None-Match"); ifNoneMatch != "" {
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if etag, err = createETag(baseTile); err != nil {
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http.NotFound(rw, r)
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return
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}
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if ifNoneMatch == etag {
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http.Error(rw, http.StatusText(http.StatusNotModified), http.StatusNotModified)
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return
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}
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if checkLastModified(rw, r, fi.ModTime()) {
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return
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}
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if checkETag(rw, r, fi) {
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return
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}
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rx := x & ^(^uint(0) << (z - 8))
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@ -82,23 +89,14 @@ func (sb *subBaseLine) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
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} else {
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// Should not happen.
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http.Error(rw,
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http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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http.StatusText(http.StatusInternalServerError),
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http.StatusInternalServerError)
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return
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}
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img = blowUp(img)
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rw.Header().Set("Content-Type", "image/png")
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if etag == "" {
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if etag, err = createETag(baseTile); err != nil {
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// Unlikely
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log.Printf("Cannot create ETag: %s", baseTile)
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} else {
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rw.Header().Set("ETag", etag)
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}
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} else {
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rw.Header().Set("ETag", etag)
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}
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if err = png.Encode(rw, img); err != nil {
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log.Printf("WARN: encoding image failed: %s", err)
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return
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@ -137,13 +135,30 @@ func blowUp(src image.Image) *image.RGBA {
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return dst
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}
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func createETag(path string) (etag string, err error) {
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var fi os.FileInfo
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if fi, err = os.Stat(path); err != nil {
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return
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func checkETag(w http.ResponseWriter, r *http.Request, fi os.FileInfo) bool {
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etag := fmt.Sprintf("%x-%x", fi.ModTime().Unix(), fi.Size())
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if ifNoneMatch := r.Header.Get("If-None-Match"); ifNoneMatch == etag {
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w.WriteHeader(http.StatusNotModified)
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return true
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}
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etag = fmt.Sprintf("%x-%x", fi.ModTime().Unix(), fi.Size())
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return
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w.Header().Set("ETag", etag)
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return false
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}
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func checkLastModified(w http.ResponseWriter, r *http.Request, modtime time.Time) bool {
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if modtime.IsZero() {
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return false
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}
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// The Date-Modified header truncates sub-second precision, so
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// use mtime < t+1s instead of mtime <= t to check for unmodified.
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if t, err := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); err == nil && modtime.Before(t.Add(1*time.Second)) {
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w.WriteHeader(http.StatusNotModified)
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return true
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}
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w.Header().Set("Last-Modified", modtime.UTC().Format(http.TimeFormat))
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return false
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}
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func toUint(s string) uint {
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@ -6,14 +6,54 @@ package main
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import (
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"encoding/json"
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"fmt"
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"image/color"
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"log"
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"net/http"
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"path/filepath"
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"sync"
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"bitbucket.org/s_l_teichmann/mtredisalize/common"
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)
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const (
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tileWidth = 18
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tileHeight = 18
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yOrderCapacity = 512
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)
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// To scan the whole height in terms of the y coordinate
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// the database is queried in height units defined in the yRanges table.
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var yRanges = [][]int16{
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{1024, 1934},
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{256, 1023},
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{128, 255},
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{64, 127},
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{32, 63},
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{16, 31},
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{8, 15},
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{4, 7},
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{2, 3},
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{0, 1},
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{-1, 0},
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{-4, -2},
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{-8, -5},
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{-16, -9},
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{-32, -17},
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{-64, -33},
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{-128, -65},
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{-256, -129},
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{-1024, -257},
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{-1934, -1025}}
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type tileUpdater struct {
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mapDir string
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redisHost string
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redisPort int
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changes map[xz]bool
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mapDir string
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redisAddress string
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colors *common.Colors
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workers int
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cond *sync.Cond
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mu sync.Mutex
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}
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type xz struct {
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@ -21,23 +61,164 @@ type xz struct {
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Z int16
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}
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func newTileUpdater(mapDir, redisHost string, redisPort int) *tileUpdater {
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return &tileUpdater{
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mapDir: mapDir,
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redisHost: redisHost,
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redisPort: redisPort}
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func (c xz) quantize() xz {
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return xz{X: (c.X - -1936) / 16, Z: (c.Z - -1936) / 16}
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}
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func newTileUpdater(mapDir, redisAddress string, colors *common.Colors, workers int) *tileUpdater {
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tu := tileUpdater{
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mapDir: mapDir,
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redisAddress: redisAddress,
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changes: map[xz]bool{},
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colors: colors,
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workers: workers}
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tu.cond = sync.NewCond(&tu.mu)
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return &tu
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}
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func (tu *tileUpdater) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
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var err error
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var data []xz
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var newChanges []xz
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decoder := json.NewDecoder(r.Body)
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if err = decoder.Decode(&data); err != nil {
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if err = decoder.Decode(&newChanges); err != nil {
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log.Printf("WARN: JSON document broken: %s", err)
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http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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log.Printf("Changes: #%d %+v\n", len(data), data)
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tu.cond.L.Lock()
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for _, c := range newChanges {
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tu.changes[c.quantize()] = true
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}
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tu.cond.L.Unlock()
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tu.cond.Signal()
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rw.WriteHeader(http.StatusOK)
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}
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func (tu *tileUpdater) doUpdates() (err error) {
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jobs := make(chan xz)
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baseDir := filepath.Join(tu.mapDir, "8")
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for i := 0; i < tu.workers; i++ {
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var client *common.RedisClient
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if client, err = common.NewRedisClient("tcp", tu.redisAddress); err != nil {
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return
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}
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btc := NewBaseTileCreator(client, tu.colors, baseDir)
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go btc.run(jobs)
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}
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go func() {
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for {
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var changes map[xz]bool
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tu.cond.L.Lock()
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for len(tu.changes) == 0 {
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tu.cond.Wait()
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}
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changes = tu.changes
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tu.changes = map[xz]bool{}
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tu.cond.L.Unlock()
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for c, _ := range changes {
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log.Printf("job: %+v", c)
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jobs <- c
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}
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}
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}()
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return
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}
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type BaseTileCreator struct {
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client *common.RedisClient
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colors *common.Colors
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renderer *common.Renderer
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yOrder *common.YOrder
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baseDir string
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}
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func NewBaseTileCreator(client *common.RedisClient,
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colors *common.Colors, baseDir string) *BaseTileCreator {
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renderer := common.NewRenderer(tileWidth, tileHeight)
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return &BaseTileCreator{
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client: client,
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colors: colors,
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baseDir: baseDir,
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renderer: renderer,
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yOrder: common.NewYOrder(renderer, yOrderCapacity)}
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}
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func (btc *BaseTileCreator) run(jobs chan xz) {
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for job := range jobs {
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x := job.X*16 + -1936 - 1
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z := job.Z*16 + -1936 - 1
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log.Printf("%d/%d %d/%d", x, z, job.X, job.Z)
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if err := btc.createTile(x, z, int(job.X), int(job.Z)); err != nil {
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log.Printf("WARN: create tile failed: %s", err)
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}
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}
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}
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func (btc *BaseTileCreator) close() error {
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return btc.client.Close()
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}
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func (btc *BaseTileCreator) createTile(x, z int16, i, j int) error {
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btc.renderer.Reset()
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btc.renderer.SetPos(x, z)
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btc.yOrder.Reset()
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drawBlock := func(block *common.Block) {
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if err := btc.yOrder.RenderBlock(block, btc.colors.NameIndex); err != nil {
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log.Printf("WARN: rendering block failed: %s", err)
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}
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}
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var c1, c2 common.Coord
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nareas := make([]common.Area, 0, tileWidth*tileHeight/2)
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oareas := make([]common.Area, 1, tileWidth*tileHeight/2)
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oareas[0] = common.Area{
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X1: 0, Z1: 0,
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X2: int16(tileWidth) - 1, Z2: int16(tileHeight) - 1}
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for _, yRange := range yRanges {
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c1.Y = yRange[0]
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c2.Y = yRange[1]
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nareas = btc.renderer.UncoveredAreas(nareas, oareas)
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if len(nareas) == 0 {
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break
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}
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for _, area := range nareas {
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c1.X = area.X1 + x
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c1.Z = area.Z1 + z
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c2.X = area.X2 + x
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c2.Z = area.Z2 + z
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query := common.Cuboid{P1: c1, P2: c2}
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if err := btc.client.QueryCuboid(query, drawBlock); err != nil {
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return err
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}
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if err := btc.yOrder.Drain(btc.colors.NameIndex); err != nil {
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log.Printf("WARN: rendering block failed: %s", err)
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}
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}
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oareas, nareas = nareas, oareas[0:0]
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}
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image := btc.renderer.CreateShadedImage(
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16, 16, (tileWidth-2)*16, (tileHeight-2)*16,
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btc.colors.Colors, color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
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path := filepath.Join(btc.baseDir, fmt.Sprintf("%d", i), fmt.Sprintf("%d.png", j))
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log.Printf("file path: %s", path)
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log.Printf("Writing (%d, %d) (%d, %d)", i, j, x, z)
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return common.SaveAsPNG(path, image)
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}
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