fix(jans-auth-server): external libraries unavaiable from Java Interception Script #11377 (#11568)

* feat(jans-core): added diagnostic to java compiler

Signed-off-by: YuriyZ <[email protected]>

* feat(jans-core): made jit java compiler verbose

Signed-off-by: YuriyZ <[email protected]>

* fix(jans-core): fixed jit compiler classpath

Signed-off-by: YuriyZ <[email protected]>

* fix(jans-core): one more fix for jit compiler classpath

Signed-off-by: YuriyZ <[email protected]>

---------

Signed-off-by: YuriyZ <[email protected]>

Author: yuriyz

jans-core/script/src/main/java/io/jans/service/custom/script/jit/SimpleJavaCompiler.java

@@ -116,8 +116,7 @@ public static String getClasspath() {
                 sb.append(url.toString()).append(File.pathSeparator);
             }
 
-            classpath = sb.toString();
-
+            classpath = fixClasspath(sb.toString());
         }
         return classpath;
     }
@@ -132,14 +131,17 @@ private <T> Class<? extends T> compile0(Class<T> superClass, String source) {
         final List<JavaFileObject> compilationUnits = Collections.singletonList(new SourceFile(toUri("Generated"), source));
         final FileManager fileManager = new FileManager(standardJavaFileManager);
         final StringWriter output = new StringWriter();
-        final JavaCompiler.CompilationTask task = compiler.getTask(output, fileManager, diagnostics, Arrays.asList("-g", "-proc:none", "-classpath", getClasspath()), null, compilationUnits);
+        final String localClasspath = getClasspath();
+        final JavaCompiler.CompilationTask task = compiler.getTask(output, fileManager, diagnostics, Arrays.asList("-g", "-verbose", "-proc:none", "-classpath", localClasspath), null, compilationUnits);
 
         if (!task.call()) {
             log.error("Compilation diagnostics:");
             for (Diagnostic<? extends JavaFileObject> diag : diagnostics.getDiagnostics()) {
                log.error(diag.getMessage(Locale.getDefault()));
             }
 
+            log.error("Full classpath: {}", localClasspath);
+
             throw new IllegalArgumentException("Compilation failed:\n" + output + "\n Source code: \n" + source);
         }
 
@@ -152,6 +154,48 @@ private <T> Class<? extends T> compile0(Class<T> superClass, String source) {
         throw new IllegalArgumentException("Compilation yielded an unexpected number of classes: " + classCount);
     }
 
+    /**
+     * Cleans a raw classpath string by:
+     * 1. Removing any leading/trailing single quotes.
+     * 2. Stripping out “jar:file:///” and “file:/” URI prefixes.
+     * 3. Removing “!/” suffixes from JAR‐in‐WAR entries.
+     * 4. Eliminating any literal newline characters.
+     *
+     * After this, each entry is a plain filesystem path, separated by File.pathSeparator.
+     *
+     * @param rawClasspath the unprocessed classpath (e.g. containing "jar:file://…!/:" or "file:/…" fragments)
+     * @return a cleaned classpath suitable for passing to JavaCompiler or ClassLoader
+     */
+    public static String fixClasspath(String rawClasspath) {
+        if (rawClasspath == null) {
+            return null;
+        }
+
+        String cp = rawClasspath;
+
+        // Remove any newline or carriage‐return characters
+        // (we only want one long line with proper path separators)
+        cp = cp.replaceAll("[\\r\\n]", "");
+
+        // Remove “!/jar:file://”
+        cp = cp.replaceAll("!/:jar", "");
+        cp = cp.replaceAll(":jar:", ":");
+
+        // Remove “file:/” prefixes
+        // This turns "file:/opt/jetty/…" into "/opt/jetty/…"
+        cp = cp.replaceAll("file:/+", "/");
+
+        // If there are any accidental duplicate path‐separators,
+        //    collapse them. For Unix/Linux, File.pathSeparator is ":"
+        String sep = File.pathSeparator;
+        String doubleSep = sep + sep;
+        while (cp.contains(doubleSep)) {
+            cp = cp.replace(doubleSep, sep);
+        }
+
+        return cp;
+    }
+
     /**
      * Represents a source file whose contents is loaded from a String
      */