Remove explicit dependency on Apache commons-io

commons-fileupload2-javax exposes this as an implicit dependency but
S3Proxy can replace its uses with Guava and modern Java.

src/main/java/org/gaul/s3proxy/crypto/Decryption.java

@@ -26,8 +26,8 @@ import javax.annotation.concurrent.ThreadSafe;
 import javax.crypto.SecretKey;
 import javax.crypto.spec.SecretKeySpec;
 
-import org.apache.commons.io.IOUtils;
-import org.apache.commons.io.input.BoundedInputStream;
+import com.google.common.io.ByteStreams;
+
 import org.jclouds.blobstore.BlobStore;
 import org.jclouds.blobstore.domain.Blob;
 import org.jclouds.blobstore.domain.BlobMetadata;
@@ -211,10 +211,10 @@ public class Decryption {
         if (this.skipFirstBlock) {
             offset = offset + Constants.AES_BLOCK_SIZE;
         }
-        IOUtils.skipFully(dis, offset);
+        ByteStreams.skipFully(dis, offset);
 
         // trim the stream to a specific length if needed
-        return new BoundedInputStream(dis, outputLength);
+        return outputLength >= 0 ? ByteStreams.limit(dis, outputLength) : dis;
     }
 
     private void calculateOffset(long offset) {

src/main/java/org/gaul/s3proxy/crypto/DecryptionInputStream.java

@@ -26,8 +26,6 @@ import javax.crypto.Cipher;
 import javax.crypto.SecretKey;
 import javax.crypto.ShortBufferException;
 
-import org.apache.commons.io.IOUtils;
-
 @ThreadSafe
 public class DecryptionInputStream extends FilterInputStream {
 
@@ -176,7 +174,8 @@ public class DecryptionInputStream extends FilterInputStream {
                 // update the remaining bytes of the next part
                 partBytesRemain = parts.get(nextPart).getSize();
 
-                IOUtils.skip(in, Constants.PADDING_BLOCK_SIZE);
+                // Cannot call ByteStreams.skipFully since in may be shorter
+                in.readNBytes(Constants.PADDING_BLOCK_SIZE);
 
                 return ofinish;
             } else {

src/main/java/org/gaul/s3proxy/crypto/PartPadding.java

@@ -23,7 +23,6 @@ import java.util.Arrays;
 
 import javax.crypto.spec.IvParameterSpec;
 
-import org.apache.commons.io.IOUtils;
 import org.jclouds.blobstore.domain.Blob;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -43,7 +42,7 @@ public class PartPadding {
         var partPadding = new PartPadding();
 
         try (var is = blob.getPayload().openStream()) {
-            byte[] paddingBytes = IOUtils.toByteArray(is);
+            byte[] paddingBytes = is.readAllBytes();
             ByteBuffer bb = ByteBuffer.wrap(paddingBytes);
 
             byte[] delimiterBytes =

src/main/java/org/gaul/s3proxy/junit/S3ProxyJunitCore.java

@@ -22,7 +22,8 @@ import java.net.URI;
 import java.nio.file.Files;
 import java.util.Properties;
 
-import org.apache.commons.io.FileUtils;
+import com.google.common.io.MoreFiles;
+
 import org.eclipse.jetty.util.component.AbstractLifeCycle;
 import org.gaul.s3proxy.AuthenticationType;
 import org.gaul.s3proxy.S3Proxy;
@@ -164,7 +165,11 @@ public class S3ProxyJunitCore {
         } catch (Exception e) {
             throw new RuntimeException("Unable to stop S3 proxy", e);
         }
-        FileUtils.deleteQuietly(blobStoreLocation);
+        try {
+            MoreFiles.deleteRecursively(blobStoreLocation.toPath());
+        } catch (IOException ioe) {
+            // ignore
+        }
         logger.debug("S3 proxy has stopped");
     }