added GZ support

src/main/java/cz/kamma/kfmanager/service/FileOperations.java

@@ -859,13 +859,14 @@ public class FileOperations {
                         }
                     }
                 }
-            } else if (name.endsWith(".tar.gz") || name.endsWith(".tgz") || name.endsWith(".tar")) {
+            } else if (name.endsWith(".tar.gz") || name.endsWith(".tgz") || name.endsWith(".tar") || name.endsWith(".gz")) {
                 InputStream is = new FileInputStream(archive);
                 if (name.endsWith(".gz") || name.endsWith(".tgz")) {
                     is = new org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream(is);
                 }
                 try (org.apache.commons.compress.archivers.tar.TarArchiveInputStream tais = new org.apache.commons.compress.archivers.tar.TarArchiveInputStream(is)) {
                     org.apache.commons.compress.archivers.tar.TarArchiveEntry entry;
+                    boolean found = false;
                     while ((entry = tais.getNextTarEntry()) != null) {
                         if (entry.getName().equals(entryPath) || (archive.getAbsolutePath() + File.separator + entry.getName()).equals(entryPath)) {
                             ByteArrayOutputStream baos = new ByteArrayOutputStream();
@@ -877,6 +878,23 @@ public class FileOperations {
                             return baos.toByteArray();
                         }
                     }
+                    if (!found && name.endsWith(".gz") && !name.endsWith(".tar.gz")) {
+                        // If it's just a .gz file, it might contain a single file with the decompressed name
+                        String originalName = archive.getName();
+                        String targetName = originalName.substring(0, originalName.length() - 3);
+                        if (targetName.equals(entryPath) || (archive.getAbsolutePath() + File.separator + targetName).equals(entryPath)) {
+                             // Re-read as simple gzip
+                             try (InputStream simpleGzip = new org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream(new FileInputStream(archive))) {
+                                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                                 byte[] buffer = new byte[65536];
+                                 int len;
+                                 while ((len = simpleGzip.read(buffer)) > 0) {
+                                     baos.write(buffer, 0, len);
+                                 }
+                                 return baos.toByteArray();
+                             }
+                        }
+                    }
                 }
             } else if (name.endsWith(".7z")) {
                 SevenZFile szf;
@@ -926,7 +944,7 @@ public class FileOperations {
     public static boolean isArchiveFile(String filename) {
         if (filename == null) return false;
         String n = filename.toLowerCase();
-        return n.endsWith(".car") || n.endsWith(".war") || n.endsWith(".zip") || n.endsWith(".jar") || n.endsWith(".tar") || n.endsWith(".tar.gz") || n.endsWith(".tgz") || n.endsWith(".7z") || n.endsWith(".rar");
+        return n.endsWith(".car") || n.endsWith(".war") || n.endsWith(".zip") || n.endsWith(".jar") || n.endsWith(".tar") || n.endsWith(".tar.gz") || n.endsWith(".tgz") || n.endsWith(".gz") || n.endsWith(".7z") || n.endsWith(".rar");
     }
 
     /**
@@ -1023,6 +1041,15 @@ public class FileOperations {
                 }
             }
 
+            // Try GZIP
+            if (name.endsWith(".gz") || name.endsWith(".tgz")) {
+                try (InputStream is = new org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream(new FileInputStream(file))) {
+                    return true;
+                } catch (Exception ignore) {
+                    // Not a valid gzip
+                }
+            }
+
             // Try TAR/TAR.GZ
             if (name.endsWith(".tar") || name.endsWith(".tar.gz") || name.endsWith(".tgz")) {
                 try {
@@ -1084,7 +1111,7 @@ public class FileOperations {
                         }
                     }
                 }
-            } else if (name.endsWith(".tar.gz") || name.endsWith(".tgz") || name.endsWith(".tar")) {
+            } else if (name.endsWith(".tar.gz") || name.endsWith(".tgz") || name.endsWith(".tar") || name.endsWith(".gz")) {
                 InputStream is = new FileInputStream(archive);
                 if (name.endsWith(".gz") || name.endsWith(".tgz")) {
                     is = new org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream(is);
@@ -1107,6 +1134,28 @@ public class FileOperations {
                             }
                         }
                     }
+                    // Fallback for single .gz file if no TAR entries found
+                    if (name.endsWith(".gz") && !name.endsWith(".tar.gz")) {
+                        String targetName = archive.getName().substring(0, archive.getName().length() - 3);
+                        boolean nameMatched = true;
+                        if (patternLower != null && !patternLower.isEmpty()) {
+                            nameMatched = matchEntry(targetName, patternLower, filenameRegex, caseSensitive);
+                        }
+                        if (nameMatched) {
+                            boolean contentMatched = true;
+                            if (contentPattern != null) {
+                                // Re-run search on simple gzip stream
+                                try (InputStream simpleGzip = new org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream(new FileInputStream(archive))) {
+                                    contentMatched = searchInStream(simpleGzip, contentPattern);
+                                } catch (Exception e) {
+                                    contentMatched = false;
+                                }
+                            }
+                            if (contentMatched) {
+                                callback.onFileFound(archive, archive.getAbsolutePath() + File.separator + targetName);
+                            }
+                        }
+                    }
                 }
             } else if (name.endsWith(".7z")) {
                 SevenZFile szf;
@@ -1283,8 +1332,17 @@ public class FileOperations {
                 extract7z(archive, targetDir, callback);
             } else if (name.endsWith(".rar")) {
                 extractRar(archive, targetDir, callback);
-            } else if (name.endsWith(".tar") || name.endsWith(".tar.gz") || name.endsWith(".tgz")) {
+            } else if (name.endsWith(".tar") || name.endsWith(".tar.gz") || name.endsWith(".tgz") || name.endsWith(".gz")) {
-                extractTar(archive, targetDir, callback);
+                try {
+                    extractTar(archive, targetDir, callback);
+                } catch (IOException e) {
+                    if (name.endsWith(".gz")) {
+                        // Maybe it's just a single gzipped file, not a tarball
+                        extractGzip(archive, targetDir, callback);
+                    } else {
+                        throw e;
+                    }
+                }
             } else {
                 // For unknown extensions, try to detect format by attempting to read
                 // First try ZIP (most common)
@@ -1646,6 +1704,27 @@ public class FileOperations {
         }
     }
 
+    private static void extractGzip(File archive, File targetDir, ProgressCallback callback) throws IOException {
+        String name = archive.getName();
+        String targetName = name.toLowerCase().endsWith(".gz") ? name.substring(0, name.length() - 3) : name + ".out";
+        File targetFile = new File(targetDir, targetName);
+
+        try (InputStream is = new org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream(new BufferedInputStream(new FileInputStream(archive)));
+             OutputStream os = new BufferedOutputStream(new FileOutputStream(targetFile))) {
+            byte[] buffer = new byte[65536];
+            int len;
+            if (callback != null) {
+                callback.onProgress(0, 0, targetName);
+            }
+            while ((len = is.read(buffer)) > 0) {
+                os.write(buffer, 0, len);
+                if (callback != null) {
+                    callback.onProgress(0, 0, targetName);
+                }
+            }
+        }
+    }
+
     public static boolean supportsArchiveRewrite(File archive) {
         if (archive == null) return false;
         String name = archive.getName().toLowerCase();