net.dreamlu.kit.AssetsKit Maven / Gradle / Ivy
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package net.dreamlu.kit;
import com.jfinal.kit.HashKit;
import com.jfinal.kit.PathKit;
import com.jfinal.kit.StrKit;
import com.jfinal.log.Log;
import com.yahoo.platform.yui.compressor.CssCompressor;
import com.yahoo.platform.yui.compressor.JavaScriptCompressor;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;
import org.mozilla.javascript.ErrorReporter;
import org.mozilla.javascript.EvaluatorException;
import java.io.*;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* YUICompressor压缩帮助类
* @author L.cm
*/
public class AssetsKit {
private static final Log log = Log.getLog(AssetsKit.class);
private static final Charset UTF_8 = Charset.forName("UTF-8");
private static final String JS_EXT = ".js", CSS_EXT = ".css";
private static final String PROTOCOL = "^https?://.+$";
// 考虑到线上环境基本不会频繁更改css,js文件为了性能故缓存
private static Map COMBO_MAP = new ConcurrentHashMap();
/**
* 压缩工具
* @param fileName 待压缩的文件列表文件 /assets/assets.jjs
* @return String 返回压缩完成之后的路径
* @throws IOException 文件不存在时异常
*/
public static String getPath(String fileName) throws IOException {
String rootPath = PathKit.getWebRootPath();
// 路径判读
if (!fileName.startsWith("/")) {
fileName = "/" + fileName;
}
String path = COMBO_MAP.get(fileName);
if (StrKit.isBlank(path)) {
return combo(rootPath, fileName);
}
File assetsFile = new File(rootPath + path);
// 文件存在则直接返回路径
if (assetsFile.exists()) {
return path;
}
return combo(rootPath, fileName);
}
/**
* 压缩css,js帮助
* @param rootPath 项目路径
* @param fileList 合并压缩的文件列表
* @param isCss 是否是css
* @param out 输出流
* @throws IOException Io异常
*/
private static void compressorHelper(String rootPath, List fileList, boolean isCss, Writer out) throws IOException {
Reader in = null;
InputStream input = null;
try {
if (isCss) {
for (String path : fileList) {
boolean isRomte = isRomte(path);
input = isRomte ? new URL(path).openStream() : new FileInputStream(rootPath + path);
// css 文件内容,并处理路径问题
String context = repairCss(IOUtils.toString(input, UTF_8), path);
if(path.indexOf(".min.") > 0 || isRomte){// 对.min.css的css放弃压缩
out.append(context);
}else{
CssCompressor css = new CssCompressor(new StringReader(context));
css.compress(out, -1);
}
input.close(); input = null;
}
}else{
// nomunge: 混淆,verbose：显示信息消息和警告,preserveAllSemiColons：保留所有的分号 ,disableOptimizations 禁止优化
boolean munge = true, verbose = false, preserveAllSemiColons = false, disableOptimizations = false;
for (String path : fileList) {
boolean isRomte = isRomte(path);
input = isRomte ? new URL(path).openStream() : new FileInputStream(rootPath + path);
in = new InputStreamReader(input, UTF_8);
if(path.indexOf(".min.") > 0 || isRomte){ // 对.min.js,和远程js放弃压缩
out.append(IOUtils.toString(in));
}else{
JavaScriptCompressor compressor = new JavaScriptCompressor(in, new ErrorReporter() {
public void warning(String message, String sourceName,
int line, String lineSource, int lineOffset) {
if (line < 0) {
log.error("\n[WARNING] " + message);
} else {
log.error("\n[WARNING] " + line + ':' + lineOffset + ':' + message);
}
}
public void error(String message, String sourceName,
int line, String lineSource, int lineOffset) {
if (line < 0) {
log.error("\n[ERROR] " + message);
} else {
log.error("\n[ERROR] " + line + ':' + lineOffset + ':' + message);
}
}
public EvaluatorException runtimeError(String message, String sourceName,
int line, String lineSource, int lineOffset) {
error(message, sourceName, line, lineSource, lineOffset);
return new EvaluatorException(message);
}
});
compressor.compress(out, -1, munge, verbose, preserveAllSemiColons, disableOptimizations);
}
input.close(); input = null;
in.close(); in = null;
}
}
out.flush();
}catch(IOException e){
throw e;
}finally{
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(input);
}
}
/**
* 将css文件里的图片相对路径修改为绝对路径
* @param content 内容
* @param path 路径
* @return String css
*/
private static String repairCss(String content, String path){
Pattern p = Pattern.compile("url\\([\\s]*['\"]?((?!['\"]?https?://|['\"]?data:|['\"]?/).*?)['\"]?[\\s]*\\)"); // 感谢Code Life(程式人生)的正则
Matcher m = p.matcher(content);
StringBuffer sb = new StringBuffer();
while (m.find()) {
String url = m.group(1).trim();
StringBuffer cssPath = new StringBuffer("url(").append(FilenameUtils.getFullPath(path)).append(url).append(")");
m.appendReplacement(sb, cssPath.toString());
}
m.appendTail(sb);
content = sb.toString();
return content;
}
/**
* 压缩工具
* @param fileName 待压缩的文件列表文件 /assets/assets.jjs
* @param rootPath 项目路径
* @return String 返回压缩完成之后的路径
* @throws IOException 文件不存在时异常
*/
private static String combo(String rootPath, String fileName) throws IOException {
File assetsConfig = new File(rootPath + fileName);
// 待压缩的文件列表不存在时抛出异常
if (!assetsConfig.exists()) {
throw new IOException(fileName + " not found...");
}
// 读取文件中的js或者css路径
List list = FileUtils.readLines(assetsConfig, UTF_8);
// 文件内容md5
StringBuilder fileMd5s = new StringBuilder();
StringBuilder config = new StringBuilder();
for (String string : list) {
config.append(string);
if (StrKit.isBlank(string)) {
continue;
}
// 去除首尾空格
string = string.trim();
// #开头的行注释 或者 远程服务器上的资源文件
if (string.startsWith("#") || isRomte(string)) {
continue;
}
// 对错误地址修复
if (!string.startsWith("/")) {
string = "/" + string;
}
String filePath = rootPath + string;
File file = new File(filePath);
if (!file.exists()) {
throw new IOException(file.getName() + " not found...");
}
String content = FileUtils.readFileToString(file, UTF_8);
fileMd5s.append(HashKit.md5(content));
}
fileMd5s.append(HashKit.md5(config.toString()));
// 文件更改时间集合hex，MD5取中间8位
String hex = HashKit.md5(fileMd5s.toString()).substring(8, 16);
boolean isCss = true;
if (fileName.endsWith(".jjs")) {
isCss = false;
}
// /assets/assets.jjs
String comboName = fileName.substring(0, fileName.indexOf('.'));
String newFileName = comboName + '-' + hex + (isCss ? CSS_EXT : JS_EXT);
String newPath = rootPath + newFileName;
File file = new File(newPath);
// 判断文件是否已存在，已存在直接返回
if (file.exists()) {
return newFileName;
}
// 将合并的结果写入文件，异常时将文件删除
OutputStream output = null;
Writer out = null;
try {
output = new FileOutputStream(newPath);
out = new OutputStreamWriter(output, UTF_8);
compressorHelper(rootPath, list, isCss, out);
// 装载文件路径
COMBO_MAP.put(fileName, newFileName);
} catch (Exception e) {
FileUtils.deleteQuietly(file);
throw new RuntimeException(fileName + " 压缩异常，请检查是否有依赖问题！");
} finally {
IOUtils.closeQuietly(output);
IOUtils.closeQuietly(out);
}
return newFileName;
}
/**
* 判断文件是否为远程资源文件,远程资源文件不进行压缩
* @param path
* @return
*/
private static boolean isRomte(String path){
if(StrKit.isBlank(path)){
return false;
}
return path.trim().matches(PROTOCOL);
}
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