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-/**
- * 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;
-}
-
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