Support for serving raw vector tiles

src/serve_raster.js

@@ -37,13 +37,9 @@ module.exports = function(maps, options, prefix) {
   var lock = new asyncLock();
 
   var app = express().disable('x-powered-by'),
-      domains = [],
+      domains = options.domains,
       tilePath = '/{z}/{x}/{y}.{format}';
 
-  if (options.domains && options.domains.length > 0) {
-    domains = options.domains.split(',');
-  }
-
   var rootPath = path.join(process.cwd(), options.root);
 
   var styleUrl = options.style;

src/serve_vector.js

@@ -0,0 +1,101 @@
+'use strict';
+
+var async = require('async'),
+    asyncLock = require('async-lock'),
+    crypto = require('crypto'),
+    fs = require('fs'),
+    path = require('path'),
+    util = require('util'),
+    zlib = require('zlib');
+
+var abaculus = require('abaculus'),
+    clone = require('clone'),
+    concat = require('concat-stream'),
+    express = require('express'),
+    mercator = new (require('sphericalmercator'))(),
+    mbgl = require('mapbox-gl-native'),
+    mbtiles = require('mbtiles'),
+    request = require('request');
+
+var utils = require('./utils');
+
+module.exports = function(maps, options, prefix) {
+  var lock = new asyncLock();
+
+  var app = express().disable('x-powered-by'),
+      domains = options.domains,
+      tilePath = '/{z}/{x}/{y}.pbf';
+
+  var rootPath = path.join(process.cwd(), options.root);
+
+  var mbtilesPath = options.mbtiles;
+  var map = {
+    tileJSON: {}
+  };
+  maps[prefix] = map;
+
+  var source = new mbtiles(path.join(rootPath, mbtilesPath), function(err) {
+    source.getInfo(function(err, info) {
+      map.tileJSON['name'] = prefix.substr(1);
+
+      Object.assign(map.tileJSON, info);
+
+      map.tileJSON['tilejson'] = '2.0.0';
+      map.tileJSON['basename'] = prefix.substr(1);
+      map.tileJSON['format'] = 'pbf';
+
+      Object.assign(map.tileJSON, options.options || {});
+    });
+  });
+
+  var tilePattern = tilePath
+    .replace('{z}', ':z(\\d+)')
+    .replace('{x}', ':x(\\d+)')
+    .replace('{y}', ':y(\\d+)');
+
+  var getTile = function(z, x, y, callback) {
+    source.getTile(z, x, y, function(err, data, headers) {
+      if (err) {
+        callback(err);
+      } else {
+        var md5 = crypto.createHash('md5').update(data).digest('base64');
+        headers['content-md5'] = md5;
+        headers['content-type'] = 'application/x-protobuf';
+        headers['content-encoding'] = 'gzip';
+
+        callback(null, data, headers);
+      }
+    });
+  };
+
+  app.get(tilePattern, function(req, res, next) {
+    var z = req.params.z | 0,
+        x = req.params.x | 0,
+        y = req.params.y | 0;
+    return getTile(z, x, y, function(err, data, headers) {
+        if (err) {
+          return next(err);
+        }
+        if (headers) {
+          res.set(headers);
+        }
+        if (data == null) {
+          return res.status(404).send('Not found');
+        } else {
+          return res.status(200).send(data);
+        }
+    }, res, next);
+  });
+
+  app.get('/index.json', function(req, res, next) {
+    var info = clone(map.tileJSON);
+
+    info.tiles = utils.getTileUrls(req.protocol, domains, req.headers.host,
+                                   prefix, tilePath, info.format,
+                                   req.query.key);
+
+    return res.send(info);
+  });
+
+  return app;
+};

src/server.js

@@ -13,7 +13,8 @@ var async = require('async'),
     express = require('express'),
     morgan = require('morgan');
 
-var serve = require('./app'),
+var serve_raster = require('./serve_raster'),
+    serve_vector = require('./serve_vector'),
     utils = require('./utils');
 
 module.exports = function(opts, callback) {
@@ -36,7 +37,11 @@ module.exports = function(opts, callback) {
       app.use(prefix, cors());
     }
 
-    app.use(prefix, serve(maps, config[prefix], prefix));
+    if (config[prefix].style) {
+      app.use(prefix, serve_raster(maps, config[prefix], prefix));
+    } else {
+      app.use(prefix, serve_vector(maps, config[prefix], prefix));
+    }
   });
 
   // serve index.html on the root
@@ -50,16 +55,9 @@ module.exports = function(opts, callback) {
       queue.push(function(callback) {
         var info = clone(map.tileJSON);
 
-        var domains = [],
-            tilePath = '/{z}/{x}/{y}.{format}';
-
-        if (config[prefix].domains && config[prefix].domains.length > 0) {
-          domains = config[prefix].domains.split(',');
-        }
-
-        info.tiles = utils.getTileUrls(req.protocol, domains, req.headers.host,
-                                       prefix, tilePath, info.format,
-                                       req.query.key);
+        info.tiles = utils.getTileUrls(
+            req.protocol, config[prefix].domains, req.headers.host,
+            prefix, '/{z}/{x}/{y}.{format}', info.format, req.query.key);
 
         callback(null, info);
       });

src/utils.js

@@ -2,7 +2,16 @@
 
 module.exports.getTileUrls = function(
     protocol, domains, host, path, tilePath, format, key) {
-  domains = domains && domains.length > 0 ? domains : [host];
+
+  if (domains) {
+    if (domains.constructor === String && domains.length > 0) {
+      domains = domains.split(',');
+    }
+  }
+  if (!domains || domains.length == 0) {
+    domains = [host];
+  }
+
   var query = (key && key.length > 0) ? ('?key=' + key) : '';
   if (path == '/') {
     path = '';