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Create CachingMiddleware for zipping and caching.

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This commit is contained in:
Chad Weider 2012-01-29 00:42:54 -08:00
parent 43f4184e8d
commit bb10f026ca
3 changed files with 190 additions and 89 deletions
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100
node/utils/Minify.js
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@ -27,16 +27,12 @@ var cleanCSS = require('clean-css');
var jsp = require("uglify-js").parser;
var pro = require("uglify-js").uglify;
var path = require('path');
var Buffer = require('buffer').Buffer;
var zlib = require('zlib');
var RequireKernel = require('require-kernel');
var server = require('../server');
var os = require('os');
var ROOT_DIR = path.normalize(__dirname + "/../" );
var JS_DIR = ROOT_DIR + '../static/js/';
var CSS_DIR = ROOT_DIR + '../static/css/';
var CACHE_DIR = ROOT_DIR + '../var/';
var TAR_PATH = path.join(__dirname, 'tar.json');
var tar = JSON.parse(fs.readFileSync(TAR_PATH, 'utf8'));
@ -110,96 +106,24 @@ function _handle(req, res, jsFilename, jsFiles) {
function respondMinified()
{
var result = undefined;
var latestModification = new Date(res.getHeader('last-modified'));
async.series([
function(callback)
{
//check the modification time of the minified js
fs.stat(CACHE_DIR + "/minified_" + jsFilename, function(err, stats)
{
if(err && err.code != "ENOENT")
{
ERR(err, callback);
return;
}
//there is no minfied file or there new changes since this file was generated, so continue generating this file
if((err && err.code == "ENOENT") || stats.mtime.getTime() < latestModification)
{
callback();
}
//the minified file is still up to date, stop minifying
else
{
callback("stop");
}
});
},
//load all js files
function (callback)
{
var values = [];
tarCode(
jsFiles
, function (content) {values.push(content)}
, function (err) {
if(ERR(err)) return;
result = values.join('');
callback();
});
},
//put all together and write it into a file
function(callback)
{
async.parallel([
//write the results plain in a file
function(callback)
{
fs.writeFile(CACHE_DIR + "minified_" + jsFilename, result, "utf8", callback);
},
//write the results compressed in a file
function(callback)
{
zlib.gzip(result, function(err, compressedResult){
//weird gzip bug that returns 0 instead of null if everything is ok
err = err === 0 ? null : err;
if(ERR(err, callback)) return;
fs.writeFile(CACHE_DIR + "minified_" + jsFilename + ".gz", compressedResult, callback);
});
}
],callback);
}
], function(err)
{
if(err && err != "stop")
{
var values = [];
res.writeHead(200, {});
tarCode(
jsFiles
, function (content) {values.push(content)}
, function (err) {
if(ERR(err)) return;
result = values.join('');
res.write(result);
res.end();
}
//check if gzip is supported by this browser
var gzipSupport = req.header('Accept-Encoding', '').indexOf('gzip') != -1;
var pathStr;
if(gzipSupport && os.type().indexOf("Windows") == -1)
{
pathStr = path.normalize(CACHE_DIR + "minified_" + jsFilename + ".gz");
res.header('Content-Encoding', 'gzip');
}
else
{
pathStr = path.normalize(CACHE_DIR + "minified_" + jsFilename );
}
res.sendfile(pathStr, { maxAge: server.maxAge });
})
);
}
//minifying is disabled, so put the files together in one file
function respondRaw()
{
res.writeHead(200, {});
tarCode(
jsFiles
, function (content) {res.write(content)}