Throw IOException if `mkdirs()` fails while unpacking ZIP file (#359) (#362)

pf4j/src/main/java/org/pf4j/util/Unzip.java

@@ -78,29 +78,32 @@ public class Unzip {
         try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(source))) {
             ZipEntry zipEntry;
             while ((zipEntry = zipInputStream.getNextEntry()) != null) {
-                try {
-                    File file = new File(destination, zipEntry.getName());
-
-                    // create intermediary directories - sometimes zip don't add them
-                    File dir = new File(file.getParent());
-                    dir.mkdirs();
-
-                    if (zipEntry.isDirectory()) {
-                        file.mkdirs();
-                    } else {
-                        byte[] buffer = new byte[1024];
-                        int length;
-                        try (FileOutputStream fos = new FileOutputStream(file)) {
-                            while ((length = zipInputStream.read(buffer)) >= 0) {
-                                fos.write(buffer, 0, length);
-                            }
+                File file = new File(destination, zipEntry.getName());
+
+                // create intermediary directories - sometimes zip don't add them
+                File dir = new File(file.getParent());
+
+                mkdirsOrThrow(dir);
+
+                if (zipEntry.isDirectory()) {
+                    mkdirsOrThrow(file);
+                } else {
+                    byte[] buffer = new byte[1024];
+                    int length;
+                    try (FileOutputStream fos = new FileOutputStream(file)) {
+                        while ((length = zipInputStream.read(buffer)) >= 0) {
+                            fos.write(buffer, 0, length);
                         }
                     }
-                } catch (FileNotFoundException e) {
-                    log.error("File '{}' not found", zipEntry.getName());
                 }
             }
         }
     }
 
+    private static void mkdirsOrThrow(File dir) throws IOException {
+        if (!dir.exists() && !dir.mkdirs()) {
+            throw new IOException("Failed to create directory " + dir);
+        }
+    }
+
 }

pf4j/src/test/java/org/pf4j/util/FileUtilsTest.java

@@ -21,6 +21,7 @@ import org.pf4j.plugin.PluginZip;
 
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -31,18 +32,34 @@ public class FileUtilsTest {
     Path pluginsPath;
 
     @Test
-    public void expandIfZip() throws Exception {
+    public void expandIfZipForZipWithOnlyModuleDescriptor() throws Exception {
         PluginZip pluginZip = new PluginZip.Builder(pluginsPath.resolve("my-plugin-1.2.3.zip"), "myPlugin")
-            .pluginVersion("1.2.3")
-            .build();
+                .pluginVersion("1.2.3")
+                .build();
 
         Path unzipped = FileUtils.expandIfZip(pluginZip.path());
         assertEquals(pluginZip.unzippedPath(), unzipped);
         assertTrue(Files.exists(unzipped.resolve("plugin.properties")));
+    }
+
+    @Test
+    public void expandIfZipForZipWithResourceFile() throws Exception {
+        PluginZip pluginZip = new PluginZip.Builder(pluginsPath.resolve("my-second-plugin-1.2.3.zip"), "myPlugin")
+                .pluginVersion("1.2.3")
+                .addFile(Paths.get("classes/META-INF/plugin-file"), "plugin")
+                .build();
 
+        Path unzipped = FileUtils.expandIfZip(pluginZip.path());
+        assertEquals(pluginZip.unzippedPath(), unzipped);
+        assertTrue(Files.exists(unzipped.resolve("classes/META-INF/plugin-file")));
+    }
+
+    @Test
+    public void expandIfZipNonZipFiles() throws Exception {
         // File without .suffix
         Path extra = pluginsPath.resolve("extra");
         assertEquals(extra, FileUtils.expandIfZip(extra));
+
         // Folder
         Path folder = pluginsPath.resolve("folder");
         assertEquals(folder, FileUtils.expandIfZip(folder));