process alfio-public-frontend index.html at compile time #657

build.gradle

@@ -1,3 +1,6 @@
+import ch.digitalfondue.jfiveparse.NodeMatcher
+import ch.digitalfondue.jfiveparse.Parser
+import ch.digitalfondue.jfiveparse.Selector
 import com.opentable.db.postgres.embedded.EmbeddedPostgres
 import com.opentable.db.postgres.embedded.PgBinaryResolver
 import org.apache.commons.io.FileUtils
@@ -6,6 +9,7 @@ import org.apache.commons.lang3.SystemUtils
 import org.apache.tools.ant.filters.ReplaceTokens
 import org.springframework.jdbc.core.JdbcTemplate
 
+import java.nio.charset.StandardCharsets
 import java.nio.file.Files
 import java.nio.file.Paths
 import java.time.Year
@@ -21,13 +25,22 @@ buildscript {
         classpath 'com.opentable.components:otj-pg-embedded:0.13.1'
         classpath 'org.postgresql:postgresql:42.2.5'
         classpath "org.springframework:spring-jdbc:$springVersion"
+
+        //this is for processing the index.html at compile time
+        classpath "com.github.alfio-event:alf.io-public-frontend:$alfioPublicFrontendVersion"
+        classpath "ch.digitalfondue.jfiveparse:jfiveparse:0.5.3"
+        //
     }
 
     repositories {
         jcenter()
         maven {
             url "https://plugins.gradle.org/m2/"
         }
+        mavenCentral()
+        maven {
+            url "https://jitpack.io"
+        }
     }
 }
 
@@ -152,7 +165,7 @@ dependencies {
     compile 'org.imgscalr:imgscalr-lib:4.2'
     compile 'org.aspectj:aspectjweaver:1.9.4'
 
-    compile 'com.github.alfio-event:alf.io-public-frontend:6872d70529'
+    compile "com.github.alfio-event:alf.io-public-frontend:$alfioPublicFrontendVersion"
 
     testCompile 'com.opentable.components:otj-pg-embedded:0.13.1'
 
@@ -229,6 +242,28 @@ processResources {
         properties['alfio.version'] = project.version
         properties['alfio.build-ts'] = ZonedDateTime.now(ZoneId.of("UTC")).format(DateTimeFormatter.ISO_ZONED_DATE_TIME)
         gradleProperties.withWriter { properties.store(it, null) }
+
+
+        //
+        // alf.io public frontend: read index.html rewrite path for css/js
+
+        final resource = Thread.currentThread().getContextClassLoader().getResourceAsStream("META-INF/resources/webjars/alfio-public-frontend/$alfioPublicFrontendVersion/alfio-public-frontend/index.html")
+        final indexDoc = new Parser().parse(new InputStreamReader(resource, StandardCharsets.UTF_8))
+
+        final basePath = "webjars/alfio-public-frontend/$alfioPublicFrontendVersion/alfio-public-frontend/"
+        NodeMatcher scriptNodes = Selector.select().element("script").toMatcher()
+
+        indexDoc.getAllNodesMatching(scriptNodes).stream().forEach({
+            it.setAttribute("src", basePath + it.getAttribute("src"))
+        })
+
+        NodeMatcher cssNodes = Selector.select().element("link").attrValEq("rel", "stylesheet").toMatcher();
+        indexDoc.getAllNodesMatching(cssNodes).stream().forEach({
+            it.setAttribute("href", basePath + it.getAttribute("href"))
+        })
+
+        final alfioPublicIndex = new File((File) it.destinationDir, "alfio-public-frontend-index.html")
+        alfioPublicIndex.write(indexDoc.getOuterHTML(), "UTF-8", false)
     }
 }
 

gradle.properties

@@ -11,4 +11,7 @@ log4jVersion=2.11.2
 jacksonVersion=2.9.9
 junitVersion=5.1.0
 
-systemProp.jdk.tls.client.protocols="TLSv1,TLSv1.1,TLSv1.2"
+systemProp.jdk.tls.client.protocols="TLSv1,TLSv1.1,TLSv1.2"
+
+# https://jitpack.io/#alfio-event/alf.io-public-frontend -> go to commit tab, set the version
+alfioPublicFrontendVersion=6872d70529

src/main/java/alfio/controller/IndexController.java

@@ -16,9 +16,8 @@
  */
 package alfio.controller;
 
-import ch.digitalfondue.jfiveparse.*;
 import lombok.AllArgsConstructor;
-import org.springframework.context.ApplicationContext;
+import org.springframework.core.io.ClassPathResource;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.util.StreamUtils;
@@ -27,15 +26,11 @@
 
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import java.io.InputStreamReader;
-import java.nio.charset.StandardCharsets;
 
 @Controller
 @AllArgsConstructor
 public class IndexController {
 
-    private final ApplicationContext applicationContext;
-
     @RequestMapping(value = "/", method = RequestMethod.HEAD)
     public ResponseEntity<String> replyToProxy() {
         return ResponseEntity.ok("Up and running!");
@@ -76,30 +71,10 @@ public ResponseEntity<String> replyToK8s() {
         "/event/{eventShortName}/ticket/{ticketId}/view"
     }, method = RequestMethod.GET)
     public void replyToIndex(HttpServletResponse response) throws IOException {
-
-        // FIXME, do this at compile time...
-        // fetch version of alfio-public-frontend, do the transformation, etc...
-        final String basePath = "webjars/alfio-public-frontend/6872d70529/alfio-public-frontend/";
-        var resource = applicationContext.getResource(basePath + "index.html");
-
         response.setContentType("text/html");
         response.setCharacterEncoding("UTF-8");
-
-        Parser p = new Parser();
-        try(var is = resource.getInputStream(); var isr = new InputStreamReader(is, StandardCharsets.UTF_8); var os = response.getOutputStream()) {
-            Document d = p.parse(isr);
-            NodeMatcher scriptNodes = Selector.select().element("script").toMatcher();
-
-            d.getAllNodesMatching(scriptNodes).stream().map(Element.class::cast).forEach(elem -> {
-                elem.setAttribute("src", basePath + elem.getAttribute("src"));
-            });
-
-            NodeMatcher cssNodes = Selector.select().element("link").attrValEq("rel", "stylesheet").toMatcher();
-            d.getAllNodesMatching(cssNodes).stream().map(Element.class::cast).forEach(elem -> {
-                elem.setAttribute("href", basePath + elem.getAttribute("href"));
-            });
-
-            StreamUtils.copy(d.getOuterHTML(), StandardCharsets.UTF_8, os);
+        try (var is = new ClassPathResource("alfio-public-frontend-index.html").getInputStream(); var os = response.getOutputStream()) {
+            StreamUtils.copy(is, os);
         }
     }
 }