Version 1

[yaffs-website] / node_modules / gzip-size / index.js

diff --git a/node_modules/gzip-size/index.js b/node_modules/gzip-size/index.js
new file mode 100644 (file)
index 0000000..b0a0cbb
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+++ b/node_modules/gzip-size/index.js
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+'use strict';
+var duplexer = require('duplexer');
+var stream = require('stream');
+var zlib = require('zlib');
+var opts = {level: 9};
+
+module.exports = function (str, cb) {
+       if (!str) {
+               cb(null, 0);
+               return;
+       }
+
+       zlib.gzip(str, opts, function (err, data) {
+               if (err) {
+                       cb(err, 0);
+                       return;
+               }
+
+               cb(err, data.length);
+       });
+};
+
+module.exports.sync = function (str) {
+       return zlib.gzipSync(str, opts).length;
+};
+
+module.exports.stream = function () {
+       var input = new stream.PassThrough();
+       var output = new stream.PassThrough();
+       var wrapper = duplexer(input, output);
+
+       var gzipSize = 0;
+       var gzip = zlib.createGzip(opts)
+               .on('data', function (buf) {
+                       gzipSize += buf.length;
+               })
+               .on('error', function () {
+                       wrapper.gzipSize = 0;
+               })
+               .on('end', function () {
+                       wrapper.gzipSize = gzipSize;
+                       wrapper.emit('gzip-size', gzipSize);
+                       output.end();
+               });
+
+       input.pipe(gzip);
+       input.pipe(output, {end: false});
+
+       return wrapper;
+};