Extract AbstractHttpException from HTTP related exceptions and provide access to error content.

enabler/src/de/schildbach/pte/exception/AbstractHttpException.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2014 the original author or authors.
+ *
+ * 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 de.schildbach.pte.exception;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.net.URL;
+
+import de.schildbach.pte.util.ParserUtils;
+
+/**
+ * @author Andreas Schildbach
+ */
+public abstract class AbstractHttpException extends ParserException
+{
+	private final URL url;
+	private final Reader errorReader;
+
+	public AbstractHttpException(final URL url, final Reader errorReader)
+	{
+		super();
+		this.url = url;
+		this.errorReader = errorReader;
+	}
+
+	public AbstractHttpException(final URL url, final String message)
+	{
+		super(message);
+		this.url = url;
+		this.errorReader = null;
+	}
+
+	public URL getUrl()
+	{
+		return url;
+	}
+
+	public Reader getErrorReader()
+	{
+		return errorReader;
+	}
+
+	public CharSequence scrapeErrorStream() throws IOException
+	{
+		if (errorReader == null)
+			return null;
+
+		final StringBuilder error = new StringBuilder(ParserUtils.SCRAPE_INITIAL_CAPACITY);
+		ParserUtils.copy(errorReader, error);
+		errorReader.close();
+
+		return error;
+	}
+}