New urls for source data tiles and rendered tiles

src/serve_data.js

@@ -0,0 +1,85 @@
+'use strict';
+
+var crypto = require('crypto'),
+    path = require('path');
+
+var clone = require('clone'),
+    express = require('express'),
+    mbtiles = require('mbtiles');
+
+var utils = require('./utils');
+
+module.exports = function(options, repo, params, id) {
+  var app = express().disable('x-powered-by');
+
+  var mbtilesFile = params.mbtiles;
+  var tileJSON = {
+    'tiles': params.domains || options.domains
+  };
+
+  repo[id] = tileJSON;
+
+  var source = new mbtiles(path.join(options.paths.mbtiles, mbtilesFile),
+                           function(err) {
+    source.getInfo(function(err, info) {
+      tileJSON['name'] = id;
+      tileJSON['format'] = 'pbf';
+
+      Object.assign(tileJSON, info);
+
+      tileJSON['tilejson'] = '2.0.0';
+      tileJSON['basename'] = id;
+
+      Object.assign(tileJSON, params.tilejson || {});
+      utils.fixTileJSONCenter(tileJSON);
+    });
+  });
+
+  var tilePattern = '/' + id + '/:z(\\d+)/:x(\\d+)/:y(\\d+).:format([\\w]+)';
+
+  app.get(tilePattern, function(req, res, next) {
+    var z = req.params.z | 0,
+        x = req.params.x | 0,
+        y = req.params.y | 0;
+    if (req.params.format != tileJSON.format) {
+      return res.status(404).send('Invalid format');
+    }
+    if (z < tileJSON.minzoom || 0 || x < 0 || y < 0 ||
+        z > tileJSON.maxzoom ||
+        x >= Math.pow(2, z) || y >= Math.pow(2, z)) {
+      return res.status(404).send('Out of bounds');
+    }
+    source.getTile(z, x, y, function(err, data, headers) {
+      if (err) {
+        if (/does not exist/.test(err.message)) {
+          return res.status(404).send(err.message);
+        } else {
+          return res.status(500).send(err.message);
+        }
+      } else {
+        var md5 = crypto.createHash('md5').update(data).digest('base64');
+        headers['content-md5'] = md5;
+        if (tileJSON['format'] == 'pbf') {
+          headers['content-type'] = 'application/x-protobuf';
+          headers['content-encoding'] = 'gzip';
+        }
+        res.set(headers);
+
+        if (data == null) {
+          return res.status(404).send('Not found');
+        } else {
+          return res.status(200).send(data);
+        }
+      }
+    });
+  });
+
+  app.get('/' + id + '.json', function(req, res, next) {
+    var info = clone(tileJSON);
+    info.tiles = utils.getTileUrls(req, info.tiles,
+                                   'data/' + id, info.format);
+    return res.send(info);
+  });
+
+  return app;
+};