bseib · November 24, 2023 17:08
diff --git a/README.md b/README.md
diff --git a/pageOne.jsp b/pageOne.jsp
 <%@ page pageEncoding="UTF-8" %>
 <%@ taglib prefix="webpack" uri="/WEB-INF/tlds/webpack.tld" %>
 <c:set var="servletContext" value="${pageContext.servletContext}" />

 <head>
  <script src="${webpack:getManifestResource(servletContext, 'page-one.js')}"></script>
 </head>

 <%-- etc --%>
diff --git a/webpack.config.js b/webpack.config.js
 const path = require('path');
 const WebpackAssetsManifest = require('webpack-assets-manifest');

 module.exports = {

  entry: {
    pricing2: './src-web/path/to/page-one.js',
  },
  output: {
    filename: '[name]-[chunkhash].js',
    path: __dirname + '/war/bundle',
  },
  module: {},
  plugins: [
    new WebpackAssetsManifest({
      writeToDisk: true,
    }),
  ],

 }

 // Running `webpack --config webpack.config.js` will put `page-one-xxxxxxxxx.js` and
 // the `manifest.json` into the `/war/bundle` directory.
diff --git a/webpack.tld b/webpack.tld
 <!-- located at war/WEB-INF/tlds/webpack.tld -->
 <taglib version="2.0" xmlns="http://java.sun.com/xml/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd">
  <tlib-version>2.0</tlib-version>
  <jsp-version>2.0</jsp-version>
  <short-name>webpack</short-name>
  <description>
     functions to deal with webpack files
  </description>
  
  <function>
    <name>getManifestResource</name>
    <function-class>your.namespace.tag.WebpackTagLib</function-class>
    <function-signature>java.lang.String getManifestResource(javax.servlet.ServletContext, java.lang.String)</function-signature>
  </function>

 </taglib>
diff --git a/WebpackTagLib.java b/WebpackTagLib.java
 package your.namespace.tag;

 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;

 import javax.servlet.ServletContext;

 import org.json.JSONException;
 import org.json.JSONObject;

 public class WebpackTagLib {
 	
 	static public String getManifestResource(ServletContext ctx, String filename) {
 		try {
 			InputStream inputStream = ctx.getResourceAsStream("/bundle/manifest.json");
 			ByteArrayOutputStream result = new ByteArrayOutputStream();
 			byte[] buffer = new byte[1024];
 			int length;
 			while ((length = inputStream.read(buffer)) != -1) {
 			    result.write(buffer, 0, length);
 			}
 			JSONObject json = new JSONObject(result.toString("UTF-8"));
 			String fullFilename = json.getString(filename);
 			if ( null == fullFilename ) {
 				return "/no/manifest/entry/for/" + filename;
 			}
 			return "/bundle/" + fullFilename;
 		}
 		catch ( JSONException | IOException e ) {
 			return "/no/manifest/entry/for/" + filename;
 		}
 	}

 }
	<%@ page pageEncoding="UTF-8" %>
	<%@ taglib prefix="webpack" uri="/WEB-INF/tlds/webpack.tld" %>
	<c:set var="servletContext" value="${pageContext.servletContext}" />

	<head>
	<script src="${webpack:getManifestResource(servletContext, 'page-one.js')}"></script>
	</head>

	<%-- etc --%>
	const path = require('path');
	const WebpackAssetsManifest = require('webpack-assets-manifest');

	module.exports = {

	entry: {
	pricing2: './src-web/path/to/page-one.js',
	},
	output: {
	filename: '[name]-[chunkhash].js',
	path: __dirname + '/war/bundle',
	},
	module: {},
	plugins: [
	new WebpackAssetsManifest({
	writeToDisk: true,
	}),
	],

	}

	// Running `webpack --config webpack.config.js` will put `page-one-xxxxxxxxx.js` and
	// the `manifest.json` into the `/war/bundle` directory.
	<!-- located at war/WEB-INF/tlds/webpack.tld -->
	<taglib version="2.0" xmlns="http://java.sun.com/xml/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd">
	<tlib-version>2.0</tlib-version>
	<jsp-version>2.0</jsp-version>
	<short-name>webpack</short-name>
	<description>
	functions to deal with webpack files
	</description>

	<function>
	<name>getManifestResource</name>
	<function-class>your.namespace.tag.WebpackTagLib</function-class>
	<function-signature>java.lang.String getManifestResource(javax.servlet.ServletContext, java.lang.String)</function-signature>
	</function>

	</taglib>
	package your.namespace.tag;

	import java.io.ByteArrayOutputStream;
	import java.io.IOException;
	import java.io.InputStream;

	import javax.servlet.ServletContext;

	import org.json.JSONException;
	import org.json.JSONObject;

	public class WebpackTagLib {

	static public String getManifestResource(ServletContext ctx, String filename) {
	try {
	InputStream inputStream = ctx.getResourceAsStream("/bundle/manifest.json");
	ByteArrayOutputStream result = new ByteArrayOutputStream();
	byte[] buffer = new byte[1024];
	int length;
	while ((length = inputStream.read(buffer)) != -1) {
	result.write(buffer, 0, length);
	}
	JSONObject json = new JSONObject(result.toString("UTF-8"));
	String fullFilename = json.getString(filename);
	if ( null == fullFilename ) {
	return "/no/manifest/entry/for/" + filename;
	}
	return "/bundle/" + fullFilename;
	}
	catch ( JSONException \| IOException e ) {
	return "/no/manifest/entry/for/" + filename;
	}
	}

	}