开发一个 IBM Mashup Center 插件用于将 HTML 转换成 XML

<plugin>
  <name>Tidy Html</name>
  <author>L. Mau</author>
  <version>1.0</version>
  <category>departmental</category>
  <editor>Html2XmlEditorPlugin</editor>
  <generator>Html2XmlGeneratorPlugin</generator>
  <description>convert any Html page into xhtml</description>
  <icon16path>/plugins/sample.mashupcenter.tidyhtml/icons/btn16_hello.gif</
	icon16path>
  <icon32path>/plugins/sample.mashupcenter.tidyhtml/icons/btn32_hello.gif</
	icon32path>
  <icon64path>/plugins/sample.mashupcenter.tidyhtml/icons/btn64_hello.gif</
	icon64path>
  <objectType>feed</objectType>
</plugin>

package sample.mashupcenter.tidyhtml;

import : : : : :   // omitted from listing

/**
 * This plugin uses JTidy to convert Html to Xml.
 */
public class Html2XmlEditorPlugin extends BaseEditorPlugin {

    private static final Log log = LogFactory.getLog(Html2XmlEditorPlugin.class);

    public  static final String I18N_RESFILE = Html2XmlConstants.PLUGIN_NAME
                                         + ".nls.tidyhtml";
    public  static final String HTTP_BASEURL = "plugins/"
                                         + Html2XmlConstants.PLUGIN_NAME +  "/";
    public  static final String RES_BASEURL  = "/" + HTTP_BASEURL;
    public  static final String HELPPATH     = HTTP_BASEURL + "help/tidyhtml.htm";

public ViewBean renderEditor(RequestData rdata, Entry entry)
{
    ResourceBundle i18n = ResourceBundle.getBundle(I18N_RESFILE,rdata.getLocale());
    String pluginId = this.getId();

    Html2XmlUrlViewBean htViewBean = new Html2XmlUrlViewBean();
    htViewBean.setEntry(entry);
    htViewBean.setHtmlUrl( entry.getAttribute(Html2XmlUrlViewBean.PARAM_HTMLURL ) );
    htViewBean.setSnapshot( entry.getAttribute(Html2XmlUrlViewBean.PARAM_SNAPSHOT ) );

    FormViewBean form = new FormViewBean();
    form.setSuffix( htViewBean.getSuffix() );
    form.addComponent( htViewBean );
    form.setOnsubmit( PluginHelper.getClientMe(pluginId, entry.getObjectId()) +
            ".invokeServer('displayHtmlPage',"  +
            PluginHelper.getClientId(pluginId, entry.getObjectId()) +
            "_" + form.getSuffix() + ");");
    form.setEntry(entry);

    FrameViewBean frame = new FrameViewBean();
    frame.addComponent(form);
    frame.setLabel(entry.getTitle());
    frame.setTitle(i18n.getString("frame.urltitle"));
    frame.setEntry(entry);
    frame.setHelpPath( HELPPATH );
    return frame;
}

public class Html2XmlUrlViewBean extends ViewBean
{
  public static final String PARAM_HTMLURL     = "htmlurl";
  public static final String PARAM_SNAPSHOT    = "snapshot";
	
  private String  htmlUrl;
  private String  snapshot;

  public Html2XmlUrlViewBean()
 {
    this.setI18NProperties( Html2XmlConstants.PLUGIN_NAME + ".nls.tidyhtml");
 }

  /* (non-Javadoc)
   * @see com.ibm.mashuphub.model.ViewBean#getJSPPath()
   */
  @Override
  public String getJSPPath() {
    return "/server/plugins/" + Html2XmlConstants.PLUGIN_NAME + "/tidyhtmlUrl.jsp";
 }

 public String getSuffix() {
    return "tidyhtmlUrl";
 }

<%@page import="sample.mashupcenter.tidyhtml.Html2XmlUrlViewBean"%>
<%
    Html2XmlUrlViewBean htViewBean = new Html2XmlUrlViewBean();
    htViewBean = (Html2XmlUrlViewBean) htViewBean.getViewBeanFromRequest(request);
ResourceBundle i18n = ResourceBundle.getBundle(htViewBean.getI18NProperties(),
                                               request.getLocale());

    String objectId = htViewBean.getEntry().getObjectId();
String id = com.ibm.mashuphub.helper.PluginHelper.getClientId(
                                            htViewBean.getPluginId(), objectId);
%>

<br/>

<label for='htmlurl'><%=i18n.getString("form.htmlurl.label") %></label>
<div  class="rightCol">
   <input type='text'
          id='<%=id%>_htmlurl'
          name='<%= Html2XmlUrlViewBean.PARAM_HTMLURL %>'
          value='<%= htViewBean.getHtmlUrl() %>'
          maxlength='256' style='width=600px;' />
</div>

<div   class="rightCol">
   <input type='checkbox'
          id='<%=id%>_snapshot'
          name='<%= Html2XmlUrlViewBean.PARAM_SNAPSHOT %>'
          value='y'
          <%= "y".equals(htViewBean.getSnapshot()) ? "checked" : "" %>  />
   <%= i18n.getString("form.snapshot.label") %>
</div>

public  ViewBean  displayHtmlPage(RequestData rdata, Entry entry)
{
    ResourceBundle i18n = ResourceBundle.getBundle(I18N_RESFILE,rdata.getLocale());
    String pluginId = this.getId();

    // do not use "url" since the latter got intercepted in RequestData.init();
    String  sHtmlUrl  = rdata.getParameter( Html2XmlUrlViewBean.PARAM_HTMLURL );
    String  snapshot  = rdata.getParameter( Html2XmlUrlViewBean.PARAM_SNAPSHOT );
    log.debug("snapshot,sHtml=" + snapshot + "," + sHtmlUrl );

    Html2XmlContentViewBean htViewBean = new Html2XmlContentViewBean();
    htViewBean.setEntry(entry);
    htViewBean.setHtmlUrl( sHtmlUrl );
    htViewBean.setSnapshot( snapshot );

    FormViewBean form = new FormViewBean();
    form.setSuffix( htViewBean.getSuffix() );
    form.addComponent( htViewBean );
form.setOnsubmit(PluginHelper.getClientMe(pluginId,
                                          entry.getObjectId())+".submit();");
    form.setEntry(entry); // must be set, used to init JS plugin object

    FrameViewBean frame = new FrameViewBean();
    frame.addComponent(form);
    frame.setLabel(entry.getTitle());
    frame.setTitle(i18n.getString("frame.tabtitle"));
    frame.setEntry(entry);
    frame.setHelpPath( HELPPATH );

    JSONAJAXResponseViewBean ajaxViewBean = new JSONAJAXResponseViewBean();
    ajaxViewBean.setMethod(JSONAJAXResponseViewBean.METHOD_SHOW_EDITOR);
    ajaxViewBean.setCode( JSONAJAXResponseViewBean.PAGE_CONTENT );
    ajaxViewBean.addComponent(frame);
    return ajaxViewBean;
}

<%@page import="sample.mashupcenter.tidyhtml.Html2XmlContentViewBean"%>
<%
    Html2XmlContentViewBean htViewBean = new Html2XmlContentViewBean();
    htViewBean = (Html2XmlContentViewBean) htViewBean.getViewBeanFromRequest(request);
ResourceBundle i18n = ResourceBundle.getBundle(htViewBean.getI18NProperties(),
                                               request.getLocale());

    String objectId = htViewBean.getEntry().getObjectId();
String id = com.ibm.mashuphub.helper.PluginHelper.getClientId(
                                             htViewBean.getPluginId(), objectId);
String me = com.ibm.mashuphub.helper.PluginHelper.getClientMe(
                                             htViewBean.getPluginId(), objectId);

    String   snapshot    = "\"" + htViewBean.getSnapshot() + "\"";
    String   htmlUrl     = htViewBean.getHtmlUrl();
    htmlUrl     = ( htmlUrl == null ?  "\"\""   :  "\"" + htmlUrl + "\"" ); 
%>
<script type="text/javascript">

    dojo.registerModulePath("plugins.tidyhtml" ,
                 "../../../../client/plugins/sample.mashupcenter.tidyhtml/script");
    dojo.require("plugins.tidyhtml.PreviewHtml");

    new plugins.tidyhtml.PreviewHtml(
               <%= me %>.plugin_id,
               <%= me %>.entry_id,
               <%= me %>.workflow);

    <%=me%>.init( <%= htmlUrl %> , <%= snapshot %> );
    <%=me%>.onLoadEditor();

</script>

<div id='<%=id%>_htmlContent' style='width:100%;
     overflow:auto; border: 2px  solid #000000;'>
</div>

onLoadEditor: function()
{
    this.id = this.getEditorId();
    this.htmlContentNode = dojo.byId( this.id + '_htmlContent' );

    this.populateContent();
},

populateContent: function( )
{
    console.log( "populateContent called" );

    var baseUrl = hub.urls.getAjaxUrl( this.plugin_id,this.entry_id, 'getHtmlContent');
    var htmlurl = baseUrl + "?htmlurl="   + escape( this.htmlUrl   );
    if ( this.htmlContentInternalNode )
        this.htmlContentNode.removeChild( this.htmlContentInternalNode );
    this.htmlContentInternalNode = document.createElement( 'iframe' );
    this.htmlContentInternalNode.setAttribute( "src", htmlurl ); 
    this.htmlContentInternalNode.setAttribute( "width", "100%" );
    this.htmlContentInternalNode.setAttribute( "height", "400px" );  
    this.htmlContentNode.appendChild( this.htmlContentInternalNode );
},

try {
    entry.generateURL(rdata.getBaseUrl(), this.getId() );
    entry.addAttribute(Html2XmlUrlViewBean.PARAM_HTMLURL, sHtmlUrl , this.getId() );
    entry.addAttribute(Html2XmlUrlViewBean.PARAM_SNAPSHOT , snapshot , this.getId() );
    // after every edit, cleanup any previously cached snapshot
    Resource  oldRes = entry.getResource( Html2XmlConstants.CACHED_XHTML );
    if ( oldRes != null )
        oldRes.deleteResource();
    } catch (HubException ex) {
        log.error("Error adding entry attribute.",ex);
}

				public FeedContent generateFeed(RequestData rdata, Entry entry) {
|-------10--------20--------30--------40--------50--------60--------70--------80--------9|
|-------- XML error:  The previous line is longer than the max of 90 characters ---------|
    String  sHtmlUrl  = entry.getAttribute(Html2XmlUrlViewBean.PARAM_HTMLURL );
    String  snapshot  = entry.getAttribute(Html2XmlUrlViewBean.PARAM_SNAPSHOT );

String result = "Html might have changed.  Table not found.";

Resource  oldRes = entry.getResource( Html2XmlConstants.CACHED_XHTML );
if ( "y".equals( snapshot ) &&  oldRes != null  ) {
   log.warn( "returning cached, snapshot=" + snapshot );
   return
				new FeedContent(oldRes.loadResource(), entry.getLifeTime());
|-------10--------20--------30--------40--------50--------60--------70--------80--------9|
|-------- XML error:  The previous line is longer than the max of 90 characters ---------|
}
            
String sHtml = getXhtml( sHtmlUrl );
if ( sHtml.length() > 0 ) {
    result = sHtml;
    if ( "y".equals( snapshot ) ) {
        try {
            Resource prepared = new Resource();
            prepared.setObjectid( entry.getObjectId() );
            prepared.setMimetype( "text/xml; charset=utf-8" );
            prepared.setFilename( Html2XmlConstants.CACHED_XHTML );
            prepared.uploadResource( sHtml.getBytes( "utf-8" ) );
       } catch (HubException e) {
            log.error(e);
       }
   }
}
return
				new FeedContent( result.getBytes( "utf-8" ), entry.getLifeTime());
|-------10--------20--------30--------40--------50--------60--------70--------80--------9|
|-------- XML error:  The previous line is longer than the max of 90 characters ---------|