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serve_rendered.js
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serve_rendered.js
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'use strict';
// SECTION START
//
// The order of the two imports below is important.
// For an unknown reason, if the order is reversed, rendering can crash.
// This happens on ARM:
// > terminate called after throwing an instance of 'std::runtime_error'
// > what(): Cannot read GLX extensions.
import 'canvas';
import '@maplibre/maplibre-gl-native';
//
// SECTION END
import advancedPool from 'advanced-pool';
import fs from 'node:fs';
import path from 'path';
import url from 'url';
import util from 'util';
import sharp from 'sharp';
import clone from 'clone';
import Color from 'color';
import express from 'express';
import sanitize from 'sanitize-filename';
import SphericalMercator from '@mapbox/sphericalmercator';
import mlgl from '@maplibre/maplibre-gl-native';
import polyline from '@mapbox/polyline';
import proj4 from 'proj4';
import axios from 'axios';
import {
getFontsPbf,
listFonts,
getTileUrls,
isValidHttpUrl,
fixTileJSONCenter,
} from './utils.js';
import {
openPMtiles,
getPMtilesInfo,
getPMtilesTile,
} from './pmtiles_adapter.js';
import { renderOverlay, renderWatermark, renderAttribution } from './render.js';
import fsp from 'node:fs/promises';
import { existsP, gunzipP } from './promises.js';
import { openMbTilesWrapper } from './mbtiles_wrapper.js';
const FLOAT_PATTERN = '[+-]?(?:\\d+|\\d+.?\\d+)';
const PATH_PATTERN =
/^((fill|stroke|width)\:[^\|]+\|)*(enc:.+|-?\d+(\.\d*)?,-?\d+(\.\d*)?(\|-?\d+(\.\d*)?,-?\d+(\.\d*)?)+)/;
const httpTester = /^https?:\/\//i;
const mercator = new SphericalMercator();
const getScale = (scale) => (scale || '@1x').slice(1, 2) | 0;
mlgl.on('message', (e) => {
if (e.severity === 'WARNING' || e.severity === 'ERROR') {
console.log('mlgl:', e);
}
});
/**
* Lookup of sharp output formats by file extension.
*/
const extensionToFormat = {
'.jpg': 'jpeg',
'.jpeg': 'jpeg',
'.png': 'png',
'.webp': 'webp',
};
/**
* Cache of response data by sharp output format and color. Entry for empty
* string is for unknown or unsupported formats.
*/
const cachedEmptyResponses = {
'': Buffer.alloc(0),
};
/**
* Create an appropriate mlgl response for http errors.
* @param {string} format The format (a sharp format or 'pbf').
* @param {string} color The background color (or empty string for transparent).
* @param {Function} callback The mlgl callback.
*/
function createEmptyResponse(format, color, callback) {
if (!format || format === 'pbf') {
callback(null, { data: cachedEmptyResponses[''] });
return;
}
if (format === 'jpg') {
format = 'jpeg';
}
if (!color) {
color = 'rgba(255,255,255,0)';
}
const cacheKey = `${format},${color}`;
const data = cachedEmptyResponses[cacheKey];
if (data) {
callback(null, { data: data });
return;
}
// create an "empty" response image
color = new Color(color);
const array = color.array();
const channels = array.length === 4 && format !== 'jpeg' ? 4 : 3;
sharp(Buffer.from(array), {
raw: {
width: 1,
height: 1,
channels,
},
})
.toFormat(format)
.toBuffer((err, buffer, info) => {
if (!err) {
cachedEmptyResponses[cacheKey] = buffer;
}
callback(null, { data: buffer });
});
}
/**
* Parses coordinate pair provided to pair of floats and ensures the resulting
* pair is a longitude/latitude combination depending on lnglat query parameter.
* @param {List} coordinatePair Coordinate pair.
* @param coordinates
* @param {object} query Request query parameters.
*/
const parseCoordinatePair = (coordinates, query) => {
const firstCoordinate = parseFloat(coordinates[0]);
const secondCoordinate = parseFloat(coordinates[1]);
// Ensure provided coordinates could be parsed and abort if not
if (isNaN(firstCoordinate) || isNaN(secondCoordinate)) {
return null;
}
// Check if coordinates have been provided as lat/lng pair instead of the
// ususal lng/lat pair and ensure resulting pair is lng/lat
if (query.latlng === '1' || query.latlng === 'true') {
return [secondCoordinate, firstCoordinate];
}
return [firstCoordinate, secondCoordinate];
};
/**
* Parses a coordinate pair from query arguments and optionally transforms it.
* @param {List} coordinatePair Coordinate pair.
* @param {object} query Request query parameters.
* @param {Function} transformer Optional transform function.
*/
const parseCoordinates = (coordinatePair, query, transformer) => {
const parsedCoordinates = parseCoordinatePair(coordinatePair, query);
// Transform coordinates
if (transformer) {
return transformer(parsedCoordinates);
}
return parsedCoordinates;
};
/**
* Parses paths provided via query into a list of path objects.
* @param {object} query Request query parameters.
* @param {Function} transformer Optional transform function.
*/
const extractPathsFromQuery = (query, transformer) => {
// Initiate paths array
const paths = [];
// Return an empty list if no paths have been provided
if ('path' in query && !query.path) {
return paths;
}
// Parse paths provided via path query argument
if ('path' in query) {
const providedPaths = Array.isArray(query.path) ? query.path : [query.path];
// Iterate through paths, parse and validate them
for (const providedPath of providedPaths) {
// Logic for pushing coords to path when path includes google polyline
if (providedPath.includes('enc:') && PATH_PATTERN.test(providedPath)) {
// +4 because 'enc:' is 4 characters, everything after 'enc:' is considered to be part of the polyline
const encIndex = providedPath.indexOf('enc:') + 4;
const coords = polyline
.decode(providedPath.substring(encIndex))
.map(([lat, lng]) => [lng, lat]);
paths.push(coords);
} else {
// Iterate through paths, parse and validate them
const currentPath = [];
// Extract coordinate-list from path
const pathParts = (providedPath || '').split('|');
// Iterate through coordinate-list, parse the coordinates and validate them
for (const pair of pathParts) {
// Extract coordinates from coordinate pair
const pairParts = pair.split(',');
// Ensure we have two coordinates
if (pairParts.length === 2) {
const pair = parseCoordinates(pairParts, query, transformer);
// Ensure coordinates could be parsed and skip them if not
if (pair === null) {
continue;
}
// Add the coordinate-pair to the current path if they are valid
currentPath.push(pair);
}
}
// Extend list of paths with current path if it contains coordinates
if (currentPath.length) {
paths.push(currentPath);
}
}
}
}
return paths;
};
/**
* Parses marker options provided via query and sets corresponding attributes
* on marker object.
* Options adhere to the following format
* [optionName]:[optionValue]
* @param {List[String]} optionsList List of option strings.
* @param {object} marker Marker object to configure.
*/
const parseMarkerOptions = (optionsList, marker) => {
for (const options of optionsList) {
const optionParts = options.split(':');
// Ensure we got an option name and value
if (optionParts.length < 2) {
continue;
}
switch (optionParts[0]) {
// Scale factor to up- or downscale icon
case 'scale':
// Scale factors must not be negative
marker.scale = Math.abs(parseFloat(optionParts[1]));
break;
// Icon offset as positive or negative pixel value in the following
// format [offsetX],[offsetY] where [offsetY] is optional
case 'offset':
const providedOffset = optionParts[1].split(',');
// Set X-axis offset
marker.offsetX = parseFloat(providedOffset[0]);
// Check if an offset has been provided for Y-axis
if (providedOffset.length > 1) {
marker.offsetY = parseFloat(providedOffset[1]);
}
break;
}
}
};
/**
* Parses markers provided via query into a list of marker objects.
* @param {object} query Request query parameters.
* @param {object} options Configuration options.
* @param {Function} transformer Optional transform function.
*/
const extractMarkersFromQuery = (query, options, transformer) => {
// Return an empty list if no markers have been provided
if (!query.marker) {
return [];
}
const markers = [];
// Check if multiple markers have been provided and mimic a list if it's a
// single maker.
const providedMarkers = Array.isArray(query.marker)
? query.marker
: [query.marker];
// Iterate through provided markers which can have one of the following
// formats
// [location]|[pathToFileTelativeToConfiguredIconPath]
// [location]|[pathToFile...]|[option]|[option]|...
for (const providedMarker of providedMarkers) {
const markerParts = providedMarker.split('|');
// Ensure we got at least a location and an icon uri
if (markerParts.length < 2) {
continue;
}
const locationParts = markerParts[0].split(',');
// Ensure the locationParts contains two items
if (locationParts.length !== 2) {
continue;
}
let iconURI = markerParts[1];
// Check if icon is served via http otherwise marker icons are expected to
// be provided as filepaths relative to configured icon path
const isRemoteURL =
iconURI.startsWith('http://') || iconURI.startsWith('https://');
const isDataURL = iconURI.startsWith('data:');
if (!(isRemoteURL || isDataURL)) {
// Sanitize URI with sanitize-filename
// https://www.npmjs.com/package/sanitize-filename#details
iconURI = sanitize(iconURI);
// If the selected icon is not part of available icons skip it
if (!options.paths.availableIcons.includes(iconURI)) {
continue;
}
iconURI = path.resolve(options.paths.icons, iconURI);
// When we encounter a remote icon check if the configuration explicitly allows them.
} else if (isRemoteURL && options.allowRemoteMarkerIcons !== true) {
continue;
} else if (isDataURL && options.allowInlineMarkerImages !== true) {
continue;
}
// Ensure marker location could be parsed
const location = parseCoordinates(locationParts, query, transformer);
if (location === null) {
continue;
}
const marker = {};
marker.location = location;
marker.icon = iconURI;
// Check if options have been provided
if (markerParts.length > 2) {
parseMarkerOptions(markerParts.slice(2), marker);
}
// Add marker to list
markers.push(marker);
}
return markers;
};
const calcZForBBox = (bbox, w, h, query) => {
let z = 25;
const padding = query.padding !== undefined ? parseFloat(query.padding) : 0.1;
const minCorner = mercator.px([bbox[0], bbox[3]], z);
const maxCorner = mercator.px([bbox[2], bbox[1]], z);
const w_ = w / (1 + 2 * padding);
const h_ = h / (1 + 2 * padding);
z -=
Math.max(
Math.log((maxCorner[0] - minCorner[0]) / w_),
Math.log((maxCorner[1] - minCorner[1]) / h_),
) / Math.LN2;
z = Math.max(Math.log(Math.max(w, h) / 256) / Math.LN2, Math.min(25, z));
return z;
};
const respondImage = (
options,
item,
z,
lon,
lat,
bearing,
pitch,
width,
height,
scale,
format,
res,
overlay = null,
mode = 'tile',
) => {
if (
Math.abs(lon) > 180 ||
Math.abs(lat) > 85.06 ||
lon !== lon ||
lat !== lat
) {
return res.status(400).send('Invalid center');
}
if (
Math.min(width, height) <= 0 ||
Math.max(width, height) * scale > (options.maxSize || 2048) ||
width !== width ||
height !== height
) {
return res.status(400).send('Invalid size');
}
if (format === 'png' || format === 'webp') {
} else if (format === 'jpg' || format === 'jpeg') {
format = 'jpeg';
} else {
return res.status(400).send('Invalid format');
}
const tileMargin = Math.max(options.tileMargin || 0, 0);
let pool;
if (mode === 'tile' && tileMargin === 0) {
pool = item.map.renderers[scale];
} else {
pool = item.map.renderersStatic[scale];
}
pool.acquire((err, renderer) => {
// For 512px tiles, use the actual maplibre-native zoom. For 256px tiles, use zoom - 1
let mlglZ;
if (width === 512) {
mlglZ = Math.max(0, z);
} else {
mlglZ = Math.max(0, z - 1);
}
const params = {
zoom: mlglZ,
center: [lon, lat],
bearing,
pitch,
width,
height,
};
// HACK(Part 1) 256px tiles are a zoom level lower than maplibre-native default tiles. this hack allows tileserver-gl to support zoom 0 256px tiles, which would actually be zoom -1 in maplibre-native. Since zoom -1 isn't supported, a double sized zoom 0 tile is requested and resized in Part 2.
if (z === 0 && width === 256) {
params.width *= 2;
params.height *= 2;
}
// END HACK(Part 1)
if (z > 0 && tileMargin > 0) {
params.width += tileMargin * 2;
params.height += tileMargin * 2;
}
renderer.render(params, (err, data) => {
pool.release(renderer);
if (err) {
console.error(err);
return res.status(500).header('Content-Type', 'text/plain').send(err);
}
const image = sharp(data, {
raw: {
premultiplied: true,
width: params.width * scale,
height: params.height * scale,
channels: 4,
},
});
if (z > 0 && tileMargin > 0) {
const y = mercator.px(params.center, z)[1];
const yoffset = Math.max(
Math.min(0, y - 128 - tileMargin),
y + 128 + tileMargin - Math.pow(2, z + 8),
);
image.extract({
left: tileMargin * scale,
top: (tileMargin + yoffset) * scale,
width: width * scale,
height: height * scale,
});
}
// HACK(Part 2) 256px tiles are a zoom level lower than maplibre-native default tiles. this hack allows tileserver-gl to support zoom 0 256px tiles, which would actually be zoom -1 in maplibre-native. Since zoom -1 isn't supported, a double sized zoom 0 tile is requested and resized here.
if (z === 0 && width === 256) {
image.resize(width * scale, height * scale);
}
// END HACK(Part 2)
const composites = [];
if (overlay) {
composites.push({ input: overlay });
}
if (item.watermark) {
const canvas = renderWatermark(width, height, scale, item.watermark);
composites.push({ input: canvas.toBuffer() });
}
if (mode === 'static' && item.staticAttributionText) {
const canvas = renderAttribution(
width,
height,
scale,
item.staticAttributionText,
);
composites.push({ input: canvas.toBuffer() });
}
if (composites.length > 0) {
image.composite(composites);
}
// Legacy formatQuality is deprecated but still works
const formatQualities = options.formatQuality || {};
if (Object.keys(formatQualities).length !== 0) {
console.log(
'WARNING: The formatQuality option is deprecated and has been replaced with formatOptions. Please see the documentation. The values from formatQuality will be used if a quality setting is not provided via formatOptions.',
);
}
const formatQuality = formatQualities[format];
const formatOptions = (options.formatOptions || {})[format] || {};
if (format === 'png') {
image.png({
progressive: formatOptions.progressive,
compressionLevel: formatOptions.compressionLevel,
adaptiveFiltering: formatOptions.adaptiveFiltering,
palette: formatOptions.palette,
quality: formatOptions.quality,
effort: formatOptions.effort,
colors: formatOptions.colors,
dither: formatOptions.dither,
});
} else if (format === 'jpeg') {
image.jpeg({ quality: formatOptions.quality || formatQuality || 80 });
} else if (format === 'webp') {
image.webp({ quality: formatOptions.quality || formatQuality || 90 });
}
image.toBuffer((err, buffer, info) => {
if (!buffer) {
return res.status(404).send('Not found');
}
res.set({
'Last-Modified': item.lastModified,
'Content-Type': `image/${format}`,
});
return res.status(200).send(buffer);
});
});
});
};
const existingFonts = {};
let maxScaleFactor = 2;
export const serve_rendered = {
init: async (options, repo) => {
maxScaleFactor = Math.min(Math.floor(options.maxScaleFactor || 3), 9);
let scalePattern = '';
for (let i = 2; i <= maxScaleFactor; i++) {
scalePattern += i.toFixed();
}
scalePattern = `@[${scalePattern}]x`;
const app = express().disable('x-powered-by');
app.get(
`/:id/(:tileSize(256|512)/)?:z(\\d+)/:x(\\d+)/:y(\\d+):scale(${scalePattern})?.:format([\\w]+)`,
(req, res, next) => {
const item = repo[req.params.id];
if (!item) {
return res.sendStatus(404);
}
const modifiedSince = req.get('if-modified-since');
const cc = req.get('cache-control');
if (modifiedSince && (!cc || cc.indexOf('no-cache') === -1)) {
if (new Date(item.lastModified) <= new Date(modifiedSince)) {
return res.sendStatus(304);
}
}
const z = req.params.z | 0;
const x = req.params.x | 0;
const y = req.params.y | 0;
const scale = getScale(req.params.scale);
const format = req.params.format;
const tileSize = parseInt(req.params.tileSize, 10) || 256;
if (
z < 0 ||
x < 0 ||
y < 0 ||
z > 22 ||
x >= Math.pow(2, z) ||
y >= Math.pow(2, z)
) {
return res.status(404).send('Out of bounds');
}
const tileCenter = mercator.ll(
[
((x + 0.5) / (1 << z)) * (256 << z),
((y + 0.5) / (1 << z)) * (256 << z),
],
z,
);
// prettier-ignore
return respondImage(
options, item, z, tileCenter[0], tileCenter[1], 0, 0, tileSize, tileSize, scale, format, res,
);
},
);
if (options.serveStaticMaps !== false) {
const staticPattern = `/:id/static/:raw(raw)?/%s/:width(\\d+)x:height(\\d+):scale(${scalePattern})?.:format([\\w]+)`;
const centerPattern = util.format(
':x(%s),:y(%s),:z(%s)(@:bearing(%s)(,:pitch(%s))?)?',
FLOAT_PATTERN,
FLOAT_PATTERN,
FLOAT_PATTERN,
FLOAT_PATTERN,
FLOAT_PATTERN,
);
app.get(
util.format(staticPattern, centerPattern),
async (req, res, next) => {
try {
const item = repo[req.params.id];
if (!item) {
return res.sendStatus(404);
}
const raw = req.params.raw;
const z = +req.params.z;
let x = +req.params.x;
let y = +req.params.y;
const bearing = +(req.params.bearing || '0');
const pitch = +(req.params.pitch || '0');
const w = req.params.width | 0;
const h = req.params.height | 0;
const scale = getScale(req.params.scale);
const format = req.params.format;
if (z < 0) {
return res.status(404).send('Invalid zoom');
}
const transformer = raw
? mercator.inverse.bind(mercator)
: item.dataProjWGStoInternalWGS;
if (transformer) {
const ll = transformer([x, y]);
x = ll[0];
y = ll[1];
}
const paths = extractPathsFromQuery(req.query, transformer);
const markers = extractMarkersFromQuery(
req.query,
options,
transformer,
);
// prettier-ignore
const overlay = await renderOverlay(
z, x, y, bearing, pitch, w, h, scale, paths, markers, req.query,
);
// prettier-ignore
return respondImage(
options, item, z, x, y, bearing, pitch, w, h, scale, format, res, overlay, 'static',
);
} catch (e) {
next(e);
}
},
);
const serveBounds = async (req, res, next) => {
try {
const item = repo[req.params.id];
if (!item) {
return res.sendStatus(404);
}
const raw = req.params.raw;
const bbox = [
+req.params.minx,
+req.params.miny,
+req.params.maxx,
+req.params.maxy,
];
let center = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
const transformer = raw
? mercator.inverse.bind(mercator)
: item.dataProjWGStoInternalWGS;
if (transformer) {
const minCorner = transformer(bbox.slice(0, 2));
const maxCorner = transformer(bbox.slice(2));
bbox[0] = minCorner[0];
bbox[1] = minCorner[1];
bbox[2] = maxCorner[0];
bbox[3] = maxCorner[1];
center = transformer(center);
}
const w = req.params.width | 0;
const h = req.params.height | 0;
const scale = getScale(req.params.scale);
const format = req.params.format;
const z = calcZForBBox(bbox, w, h, req.query);
const x = center[0];
const y = center[1];
const bearing = 0;
const pitch = 0;
const paths = extractPathsFromQuery(req.query, transformer);
const markers = extractMarkersFromQuery(
req.query,
options,
transformer,
);
// prettier-ignore
const overlay = await renderOverlay(
z, x, y, bearing, pitch, w, h, scale, paths, markers, req.query,
);
// prettier-ignore
return respondImage(
options, item, z, x, y, bearing, pitch, w, h, scale, format, res, overlay, 'static',
);
} catch (e) {
next(e);
}
};
const boundsPattern = util.format(
':minx(%s),:miny(%s),:maxx(%s),:maxy(%s)',
FLOAT_PATTERN,
FLOAT_PATTERN,
FLOAT_PATTERN,
FLOAT_PATTERN,
);
app.get(util.format(staticPattern, boundsPattern), serveBounds);
app.get('/:id/static/', (req, res, next) => {
for (const key in req.query) {
req.query[key.toLowerCase()] = req.query[key];
}
req.params.raw = true;
req.params.format = (req.query.format || 'image/png').split('/').pop();
const bbox = (req.query.bbox || '').split(',');
req.params.minx = bbox[0];
req.params.miny = bbox[1];
req.params.maxx = bbox[2];
req.params.maxy = bbox[3];
req.params.width = req.query.width || '256';
req.params.height = req.query.height || '256';
if (req.query.scale) {
req.params.width /= req.query.scale;
req.params.height /= req.query.scale;
req.params.scale = `@${req.query.scale}`;
}
return serveBounds(req, res, next);
});
const autoPattern = 'auto';
app.get(
util.format(staticPattern, autoPattern),
async (req, res, next) => {
try {
const item = repo[req.params.id];
if (!item) {
return res.sendStatus(404);
}
const raw = req.params.raw;
const w = req.params.width | 0;
const h = req.params.height | 0;
const bearing = 0;
const pitch = 0;
const scale = getScale(req.params.scale);
const format = req.params.format;
const transformer = raw
? mercator.inverse.bind(mercator)
: item.dataProjWGStoInternalWGS;
const paths = extractPathsFromQuery(req.query, transformer);
const markers = extractMarkersFromQuery(
req.query,
options,
transformer,
);
// Extract coordinates from markers
const markerCoordinates = [];
for (const marker of markers) {
markerCoordinates.push(marker.location);
}
// Create array with coordinates from markers and path
const coords = [].concat(paths.flat()).concat(markerCoordinates);
// Check if we have at least one coordinate to calculate a bounding box
if (coords.length < 1) {
return res.status(400).send('No coordinates provided');
}
const bbox = [Infinity, Infinity, -Infinity, -Infinity];
for (const pair of coords) {
bbox[0] = Math.min(bbox[0], pair[0]);
bbox[1] = Math.min(bbox[1], pair[1]);
bbox[2] = Math.max(bbox[2], pair[0]);
bbox[3] = Math.max(bbox[3], pair[1]);
}
const bbox_ = mercator.convert(bbox, '900913');
const center = mercator.inverse([
(bbox_[0] + bbox_[2]) / 2,
(bbox_[1] + bbox_[3]) / 2,
]);
// Calculate zoom level
const maxZoom = parseFloat(req.query.maxzoom);
let z = calcZForBBox(bbox, w, h, req.query);
if (maxZoom > 0) {
z = Math.min(z, maxZoom);
}
const x = center[0];
const y = center[1];
// prettier-ignore
const overlay = await renderOverlay(
z, x, y, bearing, pitch, w, h, scale, paths, markers, req.query,
);
// prettier-ignore
return respondImage(
options, item, z, x, y, bearing, pitch, w, h, scale, format, res, overlay, 'static',
);
} catch (e) {
next(e);
}
},
);
}
app.get('/(:tileSize(256|512)/)?:id.json', (req, res, next) => {
const item = repo[req.params.id];
if (!item) {
return res.sendStatus(404);
}
const tileSize = parseInt(req.params.tileSize, 10) || undefined;
const info = clone(item.tileJSON);
info.tiles = getTileUrls(
req,
info.tiles,
`styles/${req.params.id}`,
tileSize,
info.format,
item.publicUrl,
);
return res.send(info);
});
const fonts = await listFonts(options.paths.fonts);
Object.assign(existingFonts, fonts);
return app;
},
add: async (options, repo, params, id, publicUrl, dataResolver) => {
const map = {
renderers: [],
renderersStatic: [],
sources: {},
sourceTypes: {},
};
let styleJSON;
const createPool = (ratio, mode, min, max) => {
const createRenderer = (ratio, createCallback) => {
const renderer = new mlgl.Map({
mode,
ratio,
request: async (req, callback) => {
const protocol = req.url.split(':')[0];
// console.log('Handling request:', req);
if (protocol === 'sprites') {
const dir = options.paths[protocol];
const file = decodeURIComponent(req.url).substring(
protocol.length + 3,
);
fs.readFile(path.join(dir, file), (err, data) => {
callback(err, { data: data });
});
} else if (protocol === 'fonts') {
const parts = req.url.split('/');
const fontstack = decodeURIComponent(parts[2]);
const range = parts[3].split('.')[0];
try {
const concatenated = await getFontsPbf(
null,
options.paths[protocol],
fontstack,
range,
existingFonts,
);
callback(null, { data: concatenated });
} catch (err) {
callback(err, { data: null });
}
} else if (protocol === 'mbtiles' || protocol === 'pmtiles') {
const parts = req.url.split('/');
const sourceId = parts[2];
const source = map.sources[sourceId];
const sourceType = map.sourceTypes[sourceId];
const sourceInfo = styleJSON.sources[sourceId];
const z = parts[3] | 0;
const x = parts[4] | 0;
const y = parts[5].split('.')[0] | 0;
const format = parts[5].split('.')[1];
if (sourceType === 'pmtiles') {
let tileinfo = await getPMtilesTile(source, z, x, y);
let data = tileinfo.data;
let headers = tileinfo.header;
if (data == undefined) {
if (options.verbose)
console.log('MBTiles error, serving empty', err);
createEmptyResponse(
sourceInfo.format,
sourceInfo.color,
callback,
);
return;
} else {
const response = {};
response.data = data;
if (headers['Last-Modified']) {
response.modified = new Date(headers['Last-Modified']);
}
if (format === 'pbf') {
if (options.dataDecoratorFunc) {
response.data = options.dataDecoratorFunc(
sourceId,
'data',
response.data,
z,
x,
y,
);
}
}
callback(null, response);
}
} else if (sourceType === 'mbtiles') {
source.getTile(z, x, y, async (err, data, headers) => {
if (err) {
if (options.verbose)
console.log('MBTiles error, serving empty', err);
createEmptyResponse(
sourceInfo.format,
sourceInfo.color,
callback,
);
return;
}
const response = {};
if (headers['Last-Modified']) {
response.modified = new Date(headers['Last-Modified']);
}
if (format === 'pbf') {
try {
response.data = await gunzipP(data);
} catch (err) {
console.log(
'Skipping incorrect header for tile mbtiles://%s/%s/%s/%s.pbf',
id,
z,
x,
y,
);
}
if (options.dataDecoratorFunc) {
response.data = options.dataDecoratorFunc(
sourceId,
'data',
response.data,