html4kscriptconduit.java
来自「反向的AJAX。最大的特性是我们成为反向的Ajax。DWR1.x允许你用java」· Java 代码 · 共 128 行
JAVA
128 行
/* * Copyright 2005 Joe Walker * * 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.directwebremoting.dwrp;import java.io.IOException;import javax.servlet.http.HttpServletResponse;import org.directwebremoting.ScriptBuffer;import org.directwebremoting.extend.ConverterManager;import org.directwebremoting.extend.EnginePrivate;import org.directwebremoting.extend.MarshallException;import org.directwebremoting.extend.ScriptBufferUtil;import org.directwebremoting.util.MimeConstants;/** * A ScriptConduit for use with HTML/PRE wrapped Javascript output. * <p>Scripts begin with an html, body and pre tag followed by plain Javascript * without 'execute-in-parent-context' wrapping, but with script-start and * script-end markers. * <p>If this conduit is used the client should direct the output to an iframe * and then poll, looking for new data into the iframe. The html tags should be * removed and script between script-start and script-end tags eval()ed. * <p>This conduit also sends 4k of whitespace data on each flush. This causes * IE to recognise new content. This would be a significant network overhead * so it is important to use gzip on the connection. This complexity has caused * us to turn this conduit off at the moment. * @author Joe Walker [joe at getahead dot ltd dot uk] */public class Html4kScriptConduit extends BaseScriptConduit{ /** * Simple ctor * @param response Used to flush output * @param batchId The id of the batch that we are responding to * @param converterManager How we convert objects to script * @throws IOException If stream ops fail */ public Html4kScriptConduit(HttpServletResponse response, String batchId, ConverterManager converterManager) throws IOException { super(response, batchId, converterManager); } /* (non-Javadoc) * @see org.directwebremoting.dwrp.BaseCallMarshaller#getOutboundMimeType() */ protected String getOutboundMimeType() { return MimeConstants.MIME_HTML; } /* (non-Javadoc) * @see org.directwebremoting.dwrp.BaseScriptConduit#beginStream() */ public void beginStream() { synchronized (out) { out.println("<html><body><pre>"); out.println(ProtocolConstants.SCRIPT_START_MARKER); out.println(EnginePrivate.remoteBeginIFrameResponse(batchId, false)); out.println(ProtocolConstants.SCRIPT_END_MARKER); } } /* (non-Javadoc) * @see org.directwebremoting.dwrp.BaseScriptConduit#endStream() */ public void endStream() { synchronized (out) { out.println(ProtocolConstants.SCRIPT_START_MARKER); out.println(EnginePrivate.remoteEndIFrameResponse(batchId, false)); out.println(ProtocolConstants.SCRIPT_END_MARKER); out.println("</pre></body></html>"); } } /* (non-Javadoc) * @see org.directwebremoting.ScriptConduit#addScript(org.directwebremoting.ScriptBuffer) */ public boolean addScript(ScriptBuffer scriptBuffer) throws IOException, MarshallException { String script = ScriptBufferUtil.createOutput(scriptBuffer, converterManager); synchronized (out) { out.println(ProtocolConstants.SCRIPT_START_MARKER); out.println(script); out.println(ProtocolConstants.SCRIPT_END_MARKER); out.print(fourKFlushData); return flush(); } } /** * The slab of data we send to IE to get it to stream */ protected static final String fourKFlushData; static { StringBuffer buffer = new StringBuffer(409600); for (int i = 0; i < 4096; i++) { buffer.append(" "); } fourKFlushData = buffer.toString(); }}⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?