From: David ‘Bombe’ Roden <bombe@pterodactylus.net>
Date: Sat, 16 Mar 2013 11:26:19 +0000 (+0100)
Subject: Add input stream drainer.
X-Git-Url: https://git.pterodactylus.net/?a=commitdiff_plain;h=29d8aff29691b3d2e5ee9afd173966f0206d3187;p=sonitus.git

Add input stream drainer.
---

diff --git a/src/main/java/net/pterodactylus/sonitus/io/InputStreamDrainer.java b/src/main/java/net/pterodactylus/sonitus/io/InputStreamDrainer.java
new file mode 100644
index 0000000..6c374ad
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sonitus/io/InputStreamDrainer.java
@@ -0,0 +1,81 @@
+/*
+ * Sonitus - Drainer.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sonitus.io;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.logging.Logger;
+
+/**
+ * {@link Runnable} implementation that simply reads an {@link InputStream}
+ * until an {@link IOException} is thrown, or the stream reaches EOF.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class InputStreamDrainer implements Runnable {
+
+	/** The logger. */
+	private static final Logger logger = Logger.getLogger(InputStreamDrainer.class.getName());
+
+	/** The input stream to drain. */
+	private final InputStream inputStream;
+
+	/**
+	 * Creates a new input stream drainer.
+	 *
+	 * @param inputStream
+	 * 		The input stream to drain
+	 */
+	public InputStreamDrainer(InputStream inputStream) {
+		this.inputStream = inputStream;
+	}
+
+	@Override
+	public void run() {
+		byte[] buffer = new byte[1024];
+		int read;
+		try {
+			while ((read = inputStream.read(buffer)) != -1) {
+				logger.finest(String.format("Drained %d Bytes: %s", read, filteredBuffer(Arrays.copyOf(buffer, read))));
+			}
+		} catch (IOException ioe1) {
+			/* ignore, just exit. */
+		}
+	}
+
+	/**
+	 * Creates a string from all ASCII characters contained in the buffer.
+	 *
+	 * @param buffer
+	 * 		The buffer to create a string from
+	 * @return The pure-ASCII string representation of the buffer’s content
+	 */
+	private String filteredBuffer(byte[] buffer) {
+		StringBuilder filteredBuffer = new StringBuilder();
+		for (byte b : buffer) {
+			if (b == 13) {
+				filteredBuffer.append("\\n");
+			} else if ((b == 9) || ((b >= 32) && (b <= 127))) {
+				filteredBuffer.append((char) b);
+			}
+		}
+		return filteredBuffer.toString();
+	}
+
+}