[LIB-9] Add ability to archive qrcode content

[chesshog.git] / chesshog-qrcode / src / main / java / org / hedgecode / chess / qrcode / zip / ZipContentInflater.java

diff --git a/chesshog-qrcode/src/main/java/org/hedgecode/chess/qrcode/zip/ZipContentInflater.java b/chesshog-qrcode/src/main/java/org/hedgecode/chess/qrcode/zip/ZipContentInflater.java
new file mode 100644 (file)
index 0000000..0e44138
--- /dev/null
+++ b/chesshog-qrcode/src/main/java/org/hedgecode/chess/qrcode/zip/ZipContentInflater.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2018-2019. Developed by Hedgecode.
+ *
+ * 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.
+ */
+
+package org.hedgecode.chess.qrcode.zip;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.util.zip.InflaterInputStream;
+
+import org.hedgecode.chess.qrcode.ChessQRCodeConstants;
+import org.hedgecode.chess.qrcode.ChessQRCodeException;
+
+/**
+ *
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public class ZipContentInflater {
+
+    public static String inflate(String zipContents) throws ChessQRCodeException {
+        byte[] zipBytes = ZipContentUtils.base64Decode(zipContents);
+        int length = ZipContentUtils.getZipLength(zipBytes);
+        if (length > ZipContentUtils.getMaxContentLength()) {
+            throw new ChessQRCodeException(
+                    ChessQRCodeException.Type.PARSE, "zip.max.length.error"
+            );
+        }
+        byte[] resultBytes = new byte[length];
+        InflaterInputStream zin = new InflaterInputStream(
+                new ByteArrayInputStream(
+                        ZipContentUtils.getZipBytes(zipBytes)
+                )
+        );
+        try {
+            try {
+                length = zin.read(resultBytes, 0, length); // todo : check length
+            } finally {
+                zin.close();
+            }
+        } catch (IOException e) {
+            throw new ChessQRCodeException(
+                    ChessQRCodeException.Type.PARSE, "zip.inflate.read.error", e.getMessage()
+            );
+        }
+        return new String(
+                resultBytes, 0, length, ChessQRCodeConstants.CHARSET
+        );
+    }
+
+}