1 files changed, 109 insertions, 0 deletions
diff --git a/common-be/src/main/java/org/openecomp/sdc/be/csar/storage/CsarSizeReducer.java b/common-be/src/main/java/org/openecomp/sdc/be/csar/storage/CsarSizeReducer.java
new file mode 100644
index 0000000000..cf35c8c4d7
--- /dev/null
+++ b/common-be/src/main/java/org/openecomp/sdc/be/csar/storage/CsarSizeReducer.java
@@ -0,0 +1,109 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation
+ *  ================================================================================
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.be.csar.storage;
+
+import java.io.BufferedOutputStream;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.UUID;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+import java.util.zip.ZipOutputStream;
+import org.openecomp.sdc.be.csar.storage.exception.CsarSizeReducerException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class CsarSizeReducer implements PackageSizeReducer {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(CsarSizeReducer.class);
+
+    private final CsarPackageReducerConfiguration configuration;
+
+    public CsarSizeReducer(final CsarPackageReducerConfiguration configuration) {
+        this.configuration = configuration;
+    }
+
+    @Override
+    public byte[] reduce(final Path csarPackagePath) {
+        final var reducedCsarPath = Path.of(csarPackagePath + "." + UUID.randomUUID());
+
+        try (final var zf = new ZipFile(csarPackagePath.toString());
+            final var zos = new ZipOutputStream(new BufferedOutputStream(Files.newOutputStream(reducedCsarPath)))) {
+
+            zf.entries().asIterator().forEachRemaining(entry -> {
+                final var entryName = entry.getName();
+                try {
+                    if (!entry.isDirectory()) {
+                        zos.putNextEntry(new ZipEntry(entryName));
+                        if (isCandidateToRemove(entry)) {
+                            // replace with EMPTY string to avoid package description inconsistency/validation errors
+                            zos.write("".getBytes());
+                        } else {
+                            zos.write(zf.getInputStream(entry).readAllBytes());
+                        }
+                    }
+                    zos.closeEntry();
+                } catch (final IOException ei) {
+                    final var errorMsg = String.format("Failed to extract '%s' from zip '%s'", entryName, csarPackagePath);
+                    throw new CsarSizeReducerException(errorMsg, ei);
+                }
+            });
+
+        } catch (final IOException ex1) {
+            rollback(reducedCsarPath);
+            final var errorMsg = String.format("An unexpected problem happened while reading the CSAR '%s'", csarPackagePath);
+            throw new CsarSizeReducerException(errorMsg, ex1);
+        }
+        final byte[] reducedCsarBytes;
+        try {
+            reducedCsarBytes = Files.readAllBytes(reducedCsarPath);
+        } catch (final IOException e) {
+            final var errorMsg = String.format("Could not read bytes of file '%s'", csarPackagePath);
+            throw new CsarSizeReducerException(errorMsg, e);
+        }
+        try {
+            Files.delete(reducedCsarPath);
+        } catch (final IOException e) {
+            final var errorMsg = String.format("Could not delete temporary file '%s'", reducedCsarPath);
+            throw new CsarSizeReducerException(errorMsg, e);
+        }
+
+        return reducedCsarBytes;
+    }
+
+    private void rollback(final Path reducedCsarPath) {
+        if (Files.exists(reducedCsarPath)) {
+            try {
+                Files.delete(reducedCsarPath);
+            } catch (final Exception ex2) {
+                LOGGER.warn("Could not delete temporary file '{}'", reducedCsarPath, ex2);
+            }
+        }
+    }
+
+    private boolean isCandidateToRemove(final ZipEntry zipEntry) {
+        final String zipEntryName = zipEntry.getName();
+        return configuration.getFoldersToStrip().stream().anyMatch(Path.of(zipEntryName)::startsWith)
+            || zipEntry.getSize() > configuration.getSizeLimit();
+    }
+
+}