| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.sling.servlethelpers; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.io.UnsupportedEncodingException; |
| |
| import javax.servlet.ServletOutputStream; |
| import javax.servlet.WriteListener; |
| |
| import org.apache.commons.lang3.CharEncoding; |
| import org.apache.commons.lang3.StringUtils; |
| |
| /** |
| * Manage response body content. |
| */ |
| class ResponseBodySupport { |
| |
| private ByteArrayOutputStream outputStream; |
| private ServletOutputStream servletOutputStream; |
| private PrintWriter printWriter; |
| |
| public ResponseBodySupport() { |
| reset(); |
| } |
| |
| public void reset() { |
| outputStream = new ByteArrayOutputStream(); |
| servletOutputStream = null; |
| printWriter = null; |
| } |
| |
| public ServletOutputStream getOutputStream() { |
| if (servletOutputStream == null) { |
| servletOutputStream = new ServletOutputStream() { |
| @Override |
| public void write(int b) throws IOException { |
| outputStream.write(b); |
| } |
| @Override |
| public boolean isReady() { |
| return true; |
| } |
| @Override |
| public void setWriteListener(WriteListener writeListener) { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| return servletOutputStream; |
| } |
| |
| public PrintWriter getWriter(String charset) { |
| if (printWriter == null) { |
| try { |
| printWriter = new PrintWriter(new OutputStreamWriter(getOutputStream(), defaultCharset(charset))); |
| } catch (UnsupportedEncodingException ex) { |
| throw new RuntimeException("Unsupported encoding: " + defaultCharset(charset), ex); |
| } |
| } |
| return printWriter; |
| } |
| |
| public byte[] getOutput() { |
| if (printWriter != null) { |
| printWriter.flush(); |
| } |
| if (servletOutputStream != null) { |
| try { |
| servletOutputStream.flush(); |
| } catch (IOException ex) { |
| // ignore |
| } |
| } |
| return outputStream.toByteArray(); |
| } |
| |
| public String getOutputAsString(String charset) { |
| try { |
| return new String(getOutput(), defaultCharset(charset)); |
| } catch (UnsupportedEncodingException ex) { |
| throw new RuntimeException("Unsupported encoding: " + defaultCharset(charset), ex); |
| } |
| } |
| |
| private String defaultCharset(String charset) { |
| return StringUtils.defaultString(charset, CharEncoding.UTF_8); |
| } |
| |
| } |