529 lines
17 KiB
JavaScript
529 lines
17 KiB
JavaScript
'use strict';
|
|
|
|
import fsp from 'node:fs/promises';
|
|
import path from 'path';
|
|
|
|
import clone from 'clone';
|
|
import express from 'express';
|
|
import Pbf from 'pbf';
|
|
import { VectorTile } from '@mapbox/vector-tile';
|
|
import SphericalMercator from '@mapbox/sphericalmercator';
|
|
import { Image, createCanvas } from 'canvas';
|
|
import sharp from 'sharp';
|
|
|
|
import { LocalDemManager } from './contour.js';
|
|
import { fixTileJSONCenter, getTileUrls, isValidHttpUrl } from './utils.js';
|
|
import {
|
|
getPMtilesInfo,
|
|
getPMtilesTile,
|
|
openPMtiles,
|
|
} from './pmtiles_adapter.js';
|
|
import { gunzipP, gzipP } from './promises.js';
|
|
import { openMbTilesWrapper } from './mbtiles_wrapper.js';
|
|
|
|
export const serve_data = {
|
|
init: (options, repo) => {
|
|
const app = express().disable('x-powered-by');
|
|
|
|
app.get(
|
|
'/:id/:z(\\d+)/:x(\\d+)/:y(\\d+).:format([\\w.]+)',
|
|
async (req, res, next) => {
|
|
const item = repo[req.params.id];
|
|
if (!item) {
|
|
return res.sendStatus(404);
|
|
}
|
|
const tileJSONFormat = item.tileJSON.format;
|
|
const z = req.params.z | 0;
|
|
const x = req.params.x | 0;
|
|
const y = req.params.y | 0;
|
|
let format = req.params.format;
|
|
if (format === options.pbfAlias) {
|
|
format = 'pbf';
|
|
}
|
|
if (
|
|
format !== tileJSONFormat &&
|
|
!(format === 'geojson' && tileJSONFormat === 'pbf')
|
|
) {
|
|
return res.status(404).send('Invalid format');
|
|
}
|
|
if (
|
|
z < item.tileJSON.minzoom ||
|
|
0 ||
|
|
x < 0 ||
|
|
y < 0 ||
|
|
z > item.tileJSON.maxzoom ||
|
|
x >= Math.pow(2, z) ||
|
|
y >= Math.pow(2, z)
|
|
) {
|
|
return res.status(404).send('Out of bounds');
|
|
}
|
|
if (item.sourceType === 'pmtiles') {
|
|
let tileinfo = await getPMtilesTile(item.source, z, x, y);
|
|
if (tileinfo == undefined || tileinfo.data == undefined) {
|
|
return res.status(404).send('Not found');
|
|
} else {
|
|
let data = tileinfo.data;
|
|
let headers = tileinfo.header;
|
|
if (tileJSONFormat === 'pbf') {
|
|
if (options.dataDecoratorFunc) {
|
|
data = options.dataDecoratorFunc(id, 'data', data, z, x, y);
|
|
}
|
|
}
|
|
if (format === 'pbf') {
|
|
headers['Content-Type'] = 'application/x-protobuf';
|
|
} else if (format === 'geojson') {
|
|
headers['Content-Type'] = 'application/json';
|
|
const tile = new VectorTile(new Pbf(data));
|
|
const geojson = {
|
|
type: 'FeatureCollection',
|
|
features: [],
|
|
};
|
|
for (const layerName in tile.layers) {
|
|
const layer = tile.layers[layerName];
|
|
for (let i = 0; i < layer.length; i++) {
|
|
const feature = layer.feature(i);
|
|
const featureGeoJSON = feature.toGeoJSON(x, y, z);
|
|
featureGeoJSON.properties.layer = layerName;
|
|
geojson.features.push(featureGeoJSON);
|
|
}
|
|
}
|
|
data = JSON.stringify(geojson);
|
|
}
|
|
delete headers['ETag']; // do not trust the tile ETag -- regenerate
|
|
headers['Content-Encoding'] = 'gzip';
|
|
res.set(headers);
|
|
|
|
data = await gzipP(data);
|
|
|
|
return res.status(200).send(data);
|
|
}
|
|
} else if (item.sourceType === 'mbtiles') {
|
|
item.source.getTile(z, x, y, async (err, data, headers) => {
|
|
let isGzipped;
|
|
if (err) {
|
|
if (/does not exist/.test(err.message)) {
|
|
return res.status(204).send();
|
|
} else {
|
|
return res
|
|
.status(500)
|
|
.header('Content-Type', 'text/plain')
|
|
.send(err.message);
|
|
}
|
|
} else {
|
|
if (data == null) {
|
|
return res.status(404).send('Not found');
|
|
} else {
|
|
if (tileJSONFormat === 'pbf') {
|
|
isGzipped =
|
|
data.slice(0, 2).indexOf(Buffer.from([0x1f, 0x8b])) === 0;
|
|
if (options.dataDecoratorFunc) {
|
|
if (isGzipped) {
|
|
data = await gunzipP(data);
|
|
isGzipped = false;
|
|
}
|
|
data = options.dataDecoratorFunc(id, 'data', data, z, x, y);
|
|
}
|
|
}
|
|
if (format === 'pbf') {
|
|
headers['Content-Type'] = 'application/x-protobuf';
|
|
} else if (format === 'geojson') {
|
|
headers['Content-Type'] = 'application/json';
|
|
|
|
if (isGzipped) {
|
|
data = await gunzipP(data);
|
|
isGzipped = false;
|
|
}
|
|
|
|
const tile = new VectorTile(new Pbf(data));
|
|
const geojson = {
|
|
type: 'FeatureCollection',
|
|
features: [],
|
|
};
|
|
for (const layerName in tile.layers) {
|
|
const layer = tile.layers[layerName];
|
|
for (let i = 0; i < layer.length; i++) {
|
|
const feature = layer.feature(i);
|
|
const featureGeoJSON = feature.toGeoJSON(x, y, z);
|
|
featureGeoJSON.properties.layer = layerName;
|
|
geojson.features.push(featureGeoJSON);
|
|
}
|
|
}
|
|
data = JSON.stringify(geojson);
|
|
}
|
|
delete headers['ETag']; // do not trust the tile ETag -- regenerate
|
|
headers['Content-Encoding'] = 'gzip';
|
|
res.set(headers);
|
|
|
|
if (!isGzipped) {
|
|
data = await gzipP(data);
|
|
}
|
|
|
|
return res.status(200).send(data);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
},
|
|
);
|
|
|
|
app.get(
|
|
'^/:id/contour/:z([0-9]+)/:x([-.0-9]+)/:y([-.0-9]+)',
|
|
async (req, res, next) => {
|
|
try {
|
|
const item = repo?.[req.params.id];
|
|
if (!item) return res.sendStatus(404);
|
|
if (!item.source) return res.status(404).send('Missing source');
|
|
if (!item.tileJSON) return res.status(404).send('Missing tileJSON');
|
|
if (!item.sourceType)
|
|
return res.status(404).send('Missing sourceType');
|
|
|
|
const { source, tileJSON, sourceType } = item;
|
|
|
|
if (sourceType !== 'pmtiles' && sourceType !== 'mbtiles') {
|
|
return res
|
|
.status(400)
|
|
.send('Invalid sourceType. Must be pmtiles or mbtiles.');
|
|
}
|
|
|
|
const encoding = tileJSON?.encoding;
|
|
if (encoding == null) {
|
|
return res.status(400).send('Missing tileJSON.encoding');
|
|
} else if (encoding !== 'terrarium' && encoding !== 'mapbox') {
|
|
return res
|
|
.status(400)
|
|
.send('Invalid encoding. Must be terrarium or mapbox.');
|
|
}
|
|
|
|
const format = tileJSON?.format;
|
|
if (format == null) {
|
|
return res.status(400).send('Missing tileJSON.format');
|
|
} else if (format !== 'webp' && format !== 'png') {
|
|
return res.status(400).send('Invalid format. Must be webp or png.');
|
|
}
|
|
|
|
const maxzoom = tileJSON?.maxzoom;
|
|
if (maxzoom == null) {
|
|
return res.status(400).send('Missing tileJSON.maxzoom');
|
|
}
|
|
|
|
const z = parseInt(req.params.z, 10);
|
|
const x = parseFloat(req.params.x);
|
|
const y = parseFloat(req.params.y);
|
|
|
|
const demManagerInit = new LocalDemManager(
|
|
encoding,
|
|
maxzoom,
|
|
source,
|
|
sourceType,
|
|
);
|
|
const demManager = await demManagerInit.getManager();
|
|
|
|
const $data = await demManager.fetchContourTile(
|
|
z,
|
|
x,
|
|
y,
|
|
{ levels: [10] },
|
|
new AbortController(),
|
|
);
|
|
|
|
// Set the Content-Type header here
|
|
res.setHeader('Content-Type', 'application/x-protobuf');
|
|
res.setHeader('Content-Encoding', 'gzip');
|
|
res.send($data);
|
|
} catch (err) {
|
|
return res
|
|
.status(500)
|
|
.header('Content-Type', 'text/plain')
|
|
.send(err.message);
|
|
}
|
|
},
|
|
);
|
|
|
|
app.get(
|
|
'^/:id/elevation/:z([0-9]+)/:x([-.0-9]+)/:y([-.0-9]+)',
|
|
async (req, res, next) => {
|
|
try {
|
|
const item = repo?.[req.params.id];
|
|
if (!item) return res.sendStatus(404);
|
|
if (!item.source) return res.status(404).send('Missing source');
|
|
if (!item.tileJSON) return res.status(404).send('Missing tileJSON');
|
|
if (!item.sourceType)
|
|
return res.status(404).send('Missing sourceType');
|
|
|
|
const { source, tileJSON, sourceType } = item;
|
|
|
|
if (sourceType !== 'pmtiles' && sourceType !== 'mbtiles') {
|
|
return res
|
|
.status(400)
|
|
.send('Invalid sourceType. Must be pmtiles or mbtiles.');
|
|
}
|
|
|
|
const encoding = tileJSON?.encoding;
|
|
if (encoding == null) {
|
|
return res.status(400).send('Missing tileJSON.encoding');
|
|
} else if (encoding !== 'terrarium' && encoding !== 'mapbox') {
|
|
return res
|
|
.status(400)
|
|
.send('Invalid encoding. Must be terrarium or mapbox.');
|
|
}
|
|
|
|
const format = tileJSON?.format;
|
|
if (format == null) {
|
|
return res.status(400).send('Missing tileJSON.format');
|
|
} else if (format !== 'webp' && format !== 'png') {
|
|
return res.status(400).send('Invalid format. Must be webp or png.');
|
|
}
|
|
|
|
const z = parseInt(req.params.z, 10);
|
|
const x = parseFloat(req.params.x);
|
|
const y = parseFloat(req.params.y);
|
|
|
|
if (tileJSON.minzoom == null || tileJSON.maxzoom == null) {
|
|
return res.status(404).send(JSON.stringify(tileJSON));
|
|
}
|
|
|
|
const TILE_SIZE = 256;
|
|
let tileCenter;
|
|
let xy;
|
|
|
|
if (Number.isInteger(x) && Number.isInteger(y)) {
|
|
const intX = parseInt(req.params.x, 10);
|
|
const intY = parseInt(req.params.y, 10);
|
|
|
|
if (
|
|
z < tileJSON.minzoom ||
|
|
z > tileJSON.maxzoom ||
|
|
intX < 0 ||
|
|
intY < 0 ||
|
|
intX >= Math.pow(2, z) ||
|
|
intY >= Math.pow(2, z)
|
|
) {
|
|
return res.status(404).send('Out of bounds');
|
|
}
|
|
xy = [intX, intY];
|
|
tileCenter = new SphericalMercator().bbox(intX, intY, z);
|
|
} else {
|
|
if (
|
|
z < tileJSON.minzoom ||
|
|
z > tileJSON.maxzoom ||
|
|
x < -180 ||
|
|
y < -90 ||
|
|
x > 180 ||
|
|
y > 90
|
|
) {
|
|
return res.status(404).send('Out of bounds');
|
|
}
|
|
|
|
tileCenter = [y, x, y + 0.1, x + 0.1];
|
|
const { minX, minY } = new SphericalMercator().xyz(tileCenter, z);
|
|
xy = [minX, minY];
|
|
}
|
|
|
|
let data;
|
|
if (sourceType === 'pmtiles') {
|
|
const tileinfo = await getPMtilesTile(source, z, x, y);
|
|
if (!tileinfo?.data) return res.status(204).send();
|
|
data = tileinfo.data;
|
|
} else {
|
|
data = await new Promise((resolve, reject) => {
|
|
source.getTile(z, xy[0], xy[1], (err, tileData) => {
|
|
if (err) {
|
|
return /does not exist/.test(err.message)
|
|
? resolve(null)
|
|
: reject(err);
|
|
}
|
|
resolve(tileData);
|
|
});
|
|
});
|
|
}
|
|
if (data == null) return res.status(204).send();
|
|
if (!data) return res.status(404).send('Not found');
|
|
|
|
const image = new Image();
|
|
await new Promise(async (resolve, reject) => {
|
|
image.onload = async () => {
|
|
const canvas = createCanvas(TILE_SIZE, TILE_SIZE);
|
|
const context = canvas.getContext('2d');
|
|
context.drawImage(image, 0, 0);
|
|
const imgdata = context.getImageData(0, 0, TILE_SIZE, TILE_SIZE);
|
|
|
|
const arrayWidth = imgdata.width;
|
|
const arrayHeight = imgdata.height;
|
|
const bytesPerPixel = 4;
|
|
|
|
const xPixel = Math.floor(xy[0]);
|
|
const yPixel = Math.floor(xy[1]);
|
|
|
|
if (
|
|
xPixel < 0 ||
|
|
yPixel < 0 ||
|
|
xPixel >= arrayWidth ||
|
|
yPixel >= arrayHeight
|
|
) {
|
|
return reject('Out of bounds Pixel');
|
|
}
|
|
|
|
const index = (yPixel * arrayWidth + xPixel) * bytesPerPixel;
|
|
|
|
const red = imgdata.data[index];
|
|
const green = imgdata.data[index + 1];
|
|
const blue = imgdata.data[index + 2];
|
|
|
|
let elevation;
|
|
if (encoding === 'mapbox') {
|
|
elevation =
|
|
-10000 + (red * 256 * 256 + green * 256 + blue) * 0.1;
|
|
} else if (encoding === 'terrarium') {
|
|
elevation = red * 256 + green + blue / 256 - 32768;
|
|
} else {
|
|
elevation = 'invalid encoding';
|
|
}
|
|
|
|
resolve(
|
|
res.status(200).send({
|
|
z,
|
|
x: xy[0],
|
|
y: xy[1],
|
|
red,
|
|
green,
|
|
blue,
|
|
latitude: tileCenter[0],
|
|
longitude: tileCenter[1],
|
|
elevation,
|
|
}),
|
|
);
|
|
};
|
|
|
|
image.onerror = (err) => reject(err);
|
|
|
|
if (format === 'webp') {
|
|
try {
|
|
const img = await sharp(data).toFormat('png').toBuffer();
|
|
image.src = img;
|
|
} catch (err) {
|
|
reject(err);
|
|
}
|
|
} else {
|
|
image.src = data;
|
|
}
|
|
});
|
|
} catch (err) {
|
|
return res
|
|
.status(500)
|
|
.header('Content-Type', 'text/plain')
|
|
.send(err.message);
|
|
}
|
|
},
|
|
);
|
|
|
|
app.get('/:id.json', (req, res, next) => {
|
|
const item = repo[req.params.id];
|
|
if (!item) {
|
|
return res.sendStatus(404);
|
|
}
|
|
const tileSize = undefined;
|
|
const info = clone(item.tileJSON);
|
|
info.tiles = getTileUrls(
|
|
req,
|
|
info.tiles,
|
|
`data/${req.params.id}`,
|
|
tileSize,
|
|
info.format,
|
|
item.publicUrl,
|
|
{
|
|
pbf: options.pbfAlias,
|
|
},
|
|
);
|
|
return res.send(info);
|
|
});
|
|
|
|
return app;
|
|
},
|
|
add: async (options, repo, params, id, publicUrl) => {
|
|
let inputFile;
|
|
let inputType;
|
|
if (params.pmtiles) {
|
|
inputType = 'pmtiles';
|
|
if (isValidHttpUrl(params.pmtiles)) {
|
|
inputFile = params.pmtiles;
|
|
} else {
|
|
inputFile = path.resolve(options.paths.pmtiles, params.pmtiles);
|
|
}
|
|
} else if (params.mbtiles) {
|
|
inputType = 'mbtiles';
|
|
if (isValidHttpUrl(params.mbtiles)) {
|
|
console.log(
|
|
`ERROR: MBTiles does not support web based files. "${params.mbtiles}" is not a valid data file.`,
|
|
);
|
|
process.exit(1);
|
|
} else {
|
|
inputFile = path.resolve(options.paths.mbtiles, params.mbtiles);
|
|
}
|
|
}
|
|
|
|
let tileJSON = {
|
|
tiles: params.domains || options.domains,
|
|
};
|
|
|
|
if (!isValidHttpUrl(inputFile)) {
|
|
const inputFileStats = await fsp.stat(inputFile);
|
|
if (!inputFileStats.isFile() || inputFileStats.size === 0) {
|
|
throw Error(`Not valid input file: "${inputFile}"`);
|
|
}
|
|
}
|
|
|
|
let source;
|
|
let sourceType;
|
|
if (inputType === 'pmtiles') {
|
|
source = openPMtiles(inputFile);
|
|
sourceType = 'pmtiles';
|
|
const metadata = await getPMtilesInfo(source);
|
|
|
|
tileJSON['encoding'] = params['encoding'];
|
|
tileJSON['name'] = id;
|
|
tileJSON['format'] = 'pbf';
|
|
Object.assign(tileJSON, metadata);
|
|
|
|
tileJSON['tilejson'] = '2.0.0';
|
|
delete tileJSON['filesize'];
|
|
delete tileJSON['mtime'];
|
|
delete tileJSON['scheme'];
|
|
|
|
Object.assign(tileJSON, params.tilejson || {});
|
|
fixTileJSONCenter(tileJSON);
|
|
|
|
if (options.dataDecoratorFunc) {
|
|
tileJSON = options.dataDecoratorFunc(id, 'tilejson', tileJSON);
|
|
}
|
|
} else if (inputType === 'mbtiles') {
|
|
sourceType = 'mbtiles';
|
|
const mbw = await openMbTilesWrapper(inputFile);
|
|
const info = await mbw.getInfo();
|
|
source = mbw.getMbTiles();
|
|
tileJSON['encoding'] = params['encoding'];
|
|
tileJSON['name'] = id;
|
|
tileJSON['format'] = 'pbf';
|
|
|
|
Object.assign(tileJSON, info);
|
|
|
|
tileJSON['tilejson'] = '2.0.0';
|
|
delete tileJSON['filesize'];
|
|
delete tileJSON['mtime'];
|
|
delete tileJSON['scheme'];
|
|
|
|
Object.assign(tileJSON, params.tilejson || {});
|
|
fixTileJSONCenter(tileJSON);
|
|
|
|
if (options.dataDecoratorFunc) {
|
|
tileJSON = options.dataDecoratorFunc(id, 'tilejson', tileJSON);
|
|
}
|
|
}
|
|
|
|
repo[id] = {
|
|
tileJSON,
|
|
publicUrl,
|
|
source,
|
|
sourceType,
|
|
};
|
|
},
|
|
};
|