From 1772fa9d86e66ab815186c125062ca74e5b35849 Mon Sep 17 00:00:00 2001
From: Reinier Zwitserloot <reinier@zwitserloot.com>
Date: Mon, 12 Jun 2017 22:30:06 +0200
Subject: htaccess dynamically generated to canonicalize all web requests.

---
 buildScripts/website.ant.xml                 |  1 -
 src/website/lombok/website/WebsiteMaker.java | 37 ++++++++++++++++++++++++
 website/extra/htaccess                       | 43 ++++++++++++++++++++--------
 3 files changed, 68 insertions(+), 13 deletions(-)

diff --git a/buildScripts/website.ant.xml b/buildScripts/website.ant.xml
index ff37b726..4f1b8dde 100644
--- a/buildScripts/website.ant.xml
+++ b/buildScripts/website.ant.xml
@@ -76,7 +76,6 @@ such as applying the templates to produce the website, converting the changelog
 				<include name="LICENSE" />
 			</fileset>
 		</copy>
-		<copy file="website/extra/htaccess" tofile="build/website/.htaccess" />
 		<java classname="lombok.website.WebsiteMaker" failonerror="true">
 			<classpath>
 				<path refid="build.path" />
diff --git a/src/website/lombok/website/WebsiteMaker.java b/src/website/lombok/website/WebsiteMaker.java
index 4b1c0b01..10e460dd 100644
--- a/src/website/lombok/website/WebsiteMaker.java
+++ b/src/website/lombok/website/WebsiteMaker.java
@@ -220,11 +220,24 @@ public class WebsiteMaker {
 		convertDownloadEdge(freemarkerConfig, out);
 	}
 	
+	public void buildHtAccess(File out) throws Exception {
+		Configuration freemarkerConfig = new Configuration(Configuration.VERSION_2_3_25);
+		freemarkerConfig.setEncoding(Locale.ENGLISH, "UTF-8");
+		freemarkerConfig.setOutputEncoding("UTF-8");
+		freemarkerConfig.setOutputFormat(HTMLOutputFormat.INSTANCE);
+		freemarkerConfig.setTemplateLoader(createLoader("extra"));
+		freemarkerConfig.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
+		
+		outputDir.mkdirs();
+		convertHtAccess(freemarkerConfig, out);
+	}
+	
 	public void buildWebsite() throws Exception {
 		Configuration freemarkerConfig = makeFreemarkerConfig();
 		
 		outputDir.mkdirs();
 		convertTemplates(freemarkerConfig);
+		buildHtAccess(new File(outputDir, ".htaccess"));
 	}
 	
 	private TemplateLoader createLoader() throws IOException {
@@ -235,6 +248,30 @@ public class WebsiteMaker {
 		return new FileTemplateLoader(new File(baseDir, base));
 	}
 	
+	private void convertHtAccess(Configuration freemarker, File outFile) throws Exception {
+		Map<String, Object> dataModel = new HashMap<String, Object>();
+		dataModel.put("setupPages", listHtmlNames(new File(outputDir, "setup")));
+		dataModel.put("featurePages", listHtmlNames(new File(outputDir, "features")));
+		dataModel.put("experimentalPages", listHtmlNames(new File(outputDir, "features/experimental")));
+		Template template = freemarker.getTemplate("htaccess");
+		FileOutputStream fileOut = new FileOutputStream(outFile);
+		try {
+			Writer wr = new BufferedWriter(new OutputStreamWriter(fileOut, "UTF-8"));
+			template.process(dataModel, wr);
+			wr.close();
+		} finally {
+			fileOut.close();
+		}
+	}
+	
+	private List<String> listHtmlNames(File dir) {
+		List<String> out = new ArrayList<String>();
+		for (String s : dir.list()) {
+			if (s.endsWith(".html") && !s.equals("index.html")) out.add(s.substring(0, s.length() - 5));
+		}
+		return out;
+	}
+	
 	private void convertChangelog(Configuration freemarker, File outFile) throws Exception {
 		Map<String, Object> dataModel = createBasicDataModel();
 		
diff --git a/website/extra/htaccess b/website/extra/htaccess
index fd34633f..815095b9 100644
--- a/website/extra/htaccess
+++ b/website/extra/htaccess
@@ -1,17 +1,36 @@
 RewriteEngine On
-RewriteRule ^features/all$ /features/index.html [L,END]
-RewriteRule ^features/index(\.html)?$ /features/index.html [L,END]
-RewriteRule ^features/experimental/all$ /features/experimental/index.html [L,END]
-RewriteRule ^features/experimental/index(\.html)?$ /features/experimental/index.html [L,END]
-RewriteRule ^features/.*\.html$ - [L,END]
-RewriteRule ^features/(.*)$ /features/$1.html [L,END]
-RewriteRule ^features$ /features/index.html [L,END]
-RewriteRule ^features/experimental$ /features/experimental/index.html [L,END]
-RewriteRule ^changelog$ /changelog.html [L,END]
+
 RewriteRule ^$ /main.html [L,END]
-RewriteRule ^index(\.html)?$ /main.html [L,END]
+RewriteRule ^(index|home)(\.html)?$ / [NC,RC=301]
+
+RewriteRule ^changelog$ /changelog.html [L,END]
+RewriteRule ^changelog(\.html)?$ /changelog [NC,R=301]
 RewriteRule ^credits$ /credits.html [L,END]
+RewriteRule ^credits(\.html)?$ /credits [NC,R=301]
 RewriteRule ^download$ /download.html [L,END]
+RewriteRule ^download(\.html)?$ /download [NC,R=301]
 RewriteRule ^all-versions$ /all-versions.html [L,END]
-RewriteRule ^setup/.*\.html$ - [L,END]
-RewriteRule ^setup/(.*) /setup/$1.html [L,END]
+RewriteRule ^all-versions(\.html)?$ /all-versions [NC,R=301]
+
+<#list setupPages as pg>
+RewriteRule ^setup/${pg?no_esc}$ /setup/${pg?no_esc}.html [L,END]
+RewriteRule ^setup/${pg?no_esc}(\.html)?$ /setup/${pg?no_esc} [NC,R=301]
+</#list>
+
+RewriteRule ^features/all$ /features/index.html [L,END]
+RewriteRule ^features(/all)?$ /features/all [NC,R=301]
+RewriteRule ^features/index(\.html)?$ /features/all [NC,R=301]
+
+<#list featurePages as pg>
+RewriteRule ^features/${pg?no_esc}$ /features/${pg?no_esc}.html [L,END]
+RewriteRule ^features/${pg?no_esc}(\.html)?$ /features/${pg?no_esc} [NC,R=301]
+</#list>
+
+RewriteRule ^features/experimental/all$ /features/experimental/index.html [L,END]
+RewriteRule ^features/experimental(/all)?$ /features/experimental/all [NC,R=301]
+RewriteRule ^features/experimental/index(\.html)?$ /features/experimental/all [NC,R=301]
+
+<#list experimentalPages as pg>
+RewriteRule ^features/experimental/${pg?no_esc}$ /features/experimental/${pg?no_esc}.html [L,END]
+RewriteRule ^features/experimental/${pg?no_esc}(\.html)?$ /features/experimental/${pg?no_esc} [NC,R=301]
+</#list>
-- 
cgit