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Diffstat (limited to '')
-rw-r--r-- | trunk/infrastructure/framework-src/modules/faststatic.js | 318 |
1 files changed, 0 insertions, 318 deletions
diff --git a/trunk/infrastructure/framework-src/modules/faststatic.js b/trunk/infrastructure/framework-src/modules/faststatic.js deleted file mode 100644 index 5cca676..0000000 --- a/trunk/infrastructure/framework-src/modules/faststatic.js +++ /dev/null @@ -1,318 +0,0 @@ -/** - * Copyright 2009 Google Inc. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS-IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -/** - * @fileOverview serving static files, including js and css, and cacheing - * and minifying. - * - * Terminology Note: - * "path" is confusing because paths can be part of URLs and part - * of filesystem paths, and static files have both types of paths - * associated with them. Therefore, in this module: - * - * LOCALDIR or LOCALFILE refers to directories or files on the filesystem. - * - * HREF is used to describe things that go in a URL. - */ - -import("fileutils.{readFile,readFileBytes}"); -import("yuicompressor"); -import("stringutils"); -import("varz"); -import("ejs.EJS"); - -jimport("java.lang.System.out.println"); - -//---------------------------------------------------------------- -// Content Type Guessing -//---------------------------------------------------------------- - -var _contentTypes = { - 'gif': 'image/gif', - 'png': 'image/png', - 'jpg': 'image/jpeg', - 'jpeg': 'image/jpeg', - 'css': 'text/css', - 'js': 'application/x-javascript', - 'txt': 'text/plain', - 'html': 'text/html; charset=utf-8', - 'ico': 'image/x-icon', - 'swf': 'application/x-shockwave-flash', - 'zip': 'application/zip', - 'xml': 'application/xml' -}; - -var _gzipableTypes = { - 'text/css': true, - 'application/x-javascript': true, - 'text/html; charset=utf-8': true -}; - -function _guessContentType(path) { - var ext = path.split('.').pop().toLowerCase(); - return _contentTypes[ext] || 'text/plain'; -} - -//---------------------------------------------------------------- - -function _getCache(name) { - var m = 'faststatic'; - if (!appjet.cache[m]) { - appjet.cache[m] = {}; - } - var c = appjet.cache[m]; - if (!c[name]) { - c[name] = {}; - } - return c[name]; -} - -var _mtimeCheckInterval = 5000; // 5 seconds - -function _getMTime(f) { - var mcache = _getCache('mtimes'); - var now = +(new Date); - if (appjet.config.devMode || - !(mcache[f] && (now - mcache[f].lastCheck < _mtimeCheckInterval))) { - var jfile = new net.appjet.oui.JarVirtualFile(f); - if (jfile.exists() && !jfile.isDirectory()) { - mcache[f] = { - lastCheck: now, - mtime: jfile.lastModified() - }; - } else { - mcache[f] = null; - } - } - if (mcache[f]) { - return +mcache[f].mtime; - } else { - return null; - } -} - -function _wrapFile(localFile) { - return { - getPath: function() { return localFile; }, - getMTime: function() { return _getMTime(localFile); }, - getContents: function() { return _readFileAndProcess(localFile, 'string'); } - }; -} - -function _readFileAndProcess(fileName, type) { - if (fileName.slice(-8) == "_ejs.css") { - // run CSS through EJS - var template = readFile(fileName); - var ejs = new EJS({text:template, name:fileName}); - var resultString = ejs.render({}); - if (type == 'bytes') { - return new java.lang.String(resultString).getBytes("UTF-8"); - } - else { - return resultString; - } - } - else if (type == 'string') { - return readFile(fileName); - } - else if (type == 'bytes') { - return readFileBytes(fileName); - } -} - -function _cachedFileBytes(f) { - var mtime = _getMTime(f); - if (!mtime) { return null; } - var fcache = _getCache('file-bytes-cache'); - if (!(fcache[f] && (fcache[f].mtime == mtime))) { - varz.incrementInt("faststatic-file-bytes-cache-miss"); - var bytes = _readFileAndProcess(f, 'bytes'); - if (bytes) { - fcache[f] = {mtime: mtime, bytes: bytes}; - }; - } - if (fcache[f] && fcache[f].bytes) { - return fcache[f].bytes; - } else { - return null; - } -} - -function _shouldGzip(contentType) { - var userAgent = request.headers["User-Agent"]; - if (! userAgent) return false; - if (! (/Firefox/.test(userAgent) || /webkit/i.test(userAgent))) return false; - if (! _gzipableTypes[contentType]) return false; - - return request.acceptsGzip; -} - -function _getCachedGzip(original, key) { - var c = _getCache("gzipped"); - if (! c[key] || ! java.util.Arrays.equals(c[key].original, original)) { - c[key] = {original: original, - gzip: stringutils.gzip(original)}; - } - return c[key].gzip; -} - -function _setGzipHeader() { - response.setHeader("Content-Encoding", "gzip"); -} - -//---------------------------------------------------------------- - -/** - * Function for serving a single static file. - */ -function singleFileServer(localPath, opts) { - var contentType = _guessContentType(localPath); - - return function() { - (opts.cache ? response.alwaysCache() : response.neverCache()); - response.setContentType(contentType); - var bytes = _cachedFileBytes(localPath); - if (bytes) { - if (_shouldGzip(contentType)) { - bytes = _getCachedGzip(bytes, "file:"+localPath); - _setGzipHeader(); - } - response.writeBytes(bytes); - return true; - } else { - return false; - } - }; -} - -/** - * valid opts: - * alwaysCache: default false - */ -function directoryServer(localDir, opts) { - if (stringutils.endsWith(localDir, "/")) { - localDir = localDir.substr(0, localDir.length-1); - } - return function(relpath) { - if (stringutils.startsWith(relpath, "/")) { - relpath = relpath.substr(1); - } - if (relpath.indexOf('..') != -1) { - response.forbid(); - } - (opts.cache ? response.alwaysCache() : response.neverCache()); - var contentType = _guessContentType(relpath); - response.setContentType(contentType); - var fullPath = localDir + "/" + relpath; - var bytes = _cachedFileBytes(fullPath); - - if (bytes) { - if (_shouldGzip(contentType)) { - bytes = _getCachedGzip(bytes, "file:"+fullPath); - _setGzipHeader(); - } - response.writeBytes(bytes); - return true; - } else { - return false; - } - }; -} - -/** - * Serves cat files, which are concatenated versions of many files. - */ -function compressedFileServer(opts) { - var cfcache = _getCache('compressed-files'); - return function() { - var key = request.path.split('/').slice(-1)[0]; - var contentType = _guessContentType(request.path); - response.setContentType(contentType); - response.alwaysCache(); - var data = cfcache[key]; - if (data) { - if (_shouldGzip(contentType)) { - data = _getCachedGzip((new java.lang.String(data)).getBytes(response.getCharacterEncoding()), "comp:"+key); - _setGzipHeader(); - response.writeBytes(data); - } else { - response.write(data); - } - return true; - } else { - return false; - } - }; -} - -function getCompressedFilesKey(type, baseLocalDir, localFileList) { - if (stringutils.endsWith(baseLocalDir, '/')) { - baseLocalDir = baseLocalDir.substr(0, baseLocalDir.length-1); - } - - var fileList = []; - // convert passed-in file list into list of our file objects - localFileList.forEach(function(f) { - if (typeof(f) == 'string') { - fileList.push(_wrapFile(baseLocalDir+'/'+f)); - } else { - fileList.push(f); - } - }); - - // have we seen this exact fileset before? - var fsId = fileList.map(function(f) { return f.getPath(); }).join('|'); - var fsMTime = Math.max.apply(this, - fileList.map(function(f) { return f.getMTime(); })); - - var kdcache = _getCache('fileset-keydata-cache'); - if (!(kdcache[fsId] && (kdcache[fsId].mtime == fsMTime))) { - //println("cache miss for fileset: "+fsId); - //println("compressing fileset..."); - kdcache[fsId] = { - mtime: fsMTime, - keyString: _compressFilesAndMakeKey(type, fileList) - }; - } - return kdcache[fsId].keyString; -} - -function _compressFilesAndMakeKey(type, fileList) { - function _compress(s) { - if (type == 'css') { - varz.incrementInt("faststatic-yuicompressor-compressCSS"); - return yuicompressor.compressCSS(s); - } else if (type == 'js') { - varz.incrementInt("faststatic-yuicompressor-compressJS"); - return yuicompressor.compressJS(s); - } else { - throw Error('Dont know how to compress this filetype: '+type); - } - } - - var fullstr = ""; - fileList.forEach(function(f) { - fullstr += _compress(f.getContents()); - }); - - fullstr = _compress(fullstr); - - var key = stringutils.md5(fullstr) + '.' + type; - var cfcache = _getCache('compressed-files'); - cfcache[key] = fullstr; - return key; -} - |