Files
Windshaft-cartodb/lib/cartodb/middleware/lzma.js
T
Raul Ochoa 399561d076 Implement LZMA query param inflating as middleware
The req2params method is doing too many things,
this is an initial step to do fewer things in that method.
2017-08-04 17:30:46 +02:00

31 lines
730 B
JavaScript

'use strict';
var LZMA = require('lzma').LZMA;
var lzmaWorker = new LZMA();
module.exports = function lzmaMiddleware(req, res, next) {
if (!req.query.hasOwnProperty('lzma')) {
return next();
}
// Decode (from base64)
var lzma = new Buffer(req.query.lzma, 'base64')
.toString('binary')
.split('')
.map(function(c) {
return c.charCodeAt(0) - 128;
});
// Decompress
lzmaWorker.decompress(lzma, function(result) {
try {
delete req.query.lzma;
Object.assign(req.query, JSON.parse(result));
next();
} catch (err) {
next(new Error('Error parsing lzma as JSON: ' + err));
}
});
};