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36 lines
1.1 KiB
36 lines
1.1 KiB
9 years ago
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var http = require("http"),
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zlib = require("zlib"),
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fs = require("fs"),
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path = require("path");
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var langdata = require('../common/langdata.json')
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function getLanguageData(req, res, cb){
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var lang = req.options.lang;
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var langfile = lang + '.traineddata.gz';
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var url = req.workerOptions.langPath + langfile;
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fs.readFile(lang + '.traineddata', function (err, data) {
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if(!err) return cb(new Uint8Array(data));
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http.get(url, function(stream){
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var received_bytes = 0;
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stream.on('data', function(chunk) {
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received_bytes += chunk.length;
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res.progress({
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status: 'downloading ' + langfile,
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loaded: received_bytes,
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progress: Math.min(1, received_bytes / langdata[lang])
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});
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});
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var gunzip = zlib.createGunzip();
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stream.pipe(gunzip).pipe(fs.createWriteStream(lang + '.traineddata'))
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gunzip.on('end', function(){ getLanguageData(req, stream, cb) })
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})
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});
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}
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module.exports = getLanguageData;
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