60 lines
1.6 KiB
JavaScript
60 lines
1.6 KiB
JavaScript
'use strict';
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var async = require('async'),
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path = require('path'),
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fs = require('fs');
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var clone = require('clone'),
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express = require('express');
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module.exports = function(options, allowedFonts) {
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var app = express().disable('x-powered-by');
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var fontPath = options.paths.fonts;
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var getFontPbf = function(name, range, callback) {
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// if some of the files failed to load (does not exist or not allowed),
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// return empty buffer so the other fonts can still work
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if (allowedFonts[name]) {
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var filename = path.join(fontPath, name, range + '.pbf');
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return fs.readFile(filename, function(err, data) {
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if (err) {
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console.log('Font load error:', filename);
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return callback(null, new Buffer([]));
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} else {
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return callback(null, data);
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}
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});
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} else {
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return callback(null, new Buffer([]));
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}
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};
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app.get('/:fontstack/:range([\\d]+-[\\d]+).pbf',
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function(req, res, next) {
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var fontstack = decodeURI(req.params.fontstack);
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var range = req.params.range;
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var fonts = fontstack.split(',');
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var queue = [];
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fonts.forEach(function(font) {
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queue.push(function(callback) {
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getFontPbf(font, range, callback);
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});
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});
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return async.parallel(queue, function(err, results) {
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var concated = Buffer.concat(results);
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if (err || concated.length == 0) {
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return res.status(400).send('');
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} else {
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res.header('Content-type', 'application/x-protobuf');
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return res.send(concated);
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}
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});
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});
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return app;
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};
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