metaweblogapihandler.java

这个weblogging 设计得比较精巧

package org.roller.presentation.xmlrpc;

import java.io.ByteArrayInputStream;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Date;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Vector;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.util.RequestUtils;
import org.apache.xmlrpc.XmlRpcException;
import org.roller.RollerException;
import org.roller.model.FileManager;
import org.roller.model.Roller;
import org.roller.model.WeblogManager;
import org.roller.pojos.WeblogCategoryData;
import org.roller.pojos.WeblogEntryData;
import org.roller.pojos.WebsiteData;
import org.roller.presentation.RollerContext;
import org.roller.presentation.RollerRequest;
import org.roller.util.RollerMessages;
import org.roller.util.Utilities;


/**
 * Roller XML-RPC Handler for the MetaWeblog API.
 *
 * MetaWeblog API spec can be found at http://www.xmlrpc.com/metaWeblogApi
 *
 * @author David M Johnson
 */
public class MetaWeblogAPIHandler extends BloggerAPIHandler
{
    static final long serialVersionUID = -1364456614935668629L;
    
    private static Log mLogger =
        LogFactory.getFactory().getInstance(MetaWeblogAPIHandler.class);

    public MetaWeblogAPIHandler()
    {
        super();
    }

    //------------------------------------------------------------------------

    /**
     * Authenticates a user and returns the categories available in the website
     *
     * @param blogid Dummy Value for Roller
     * @param userid Login for a MetaWeblog user who has permission to post to the blog
     * @param password Password for said username
     * @throws Exception
     * @return
     */
    public Object getCategories(String blogid, String userid, String password)
                         throws Exception
    {
        mLogger.info("getCategories() Called =====[ SUPPORTED ]=====");
        mLogger.info("     BlogId: " + blogid);
        mLogger.info("     UserId: " + userid);

        WebsiteData website = validate(userid,password);
        RollerRequest rreq = RollerRequest.getRollerRequest();
        Roller roller = rreq.getRoller();
        try
        {
            Hashtable result = new Hashtable();
            WeblogManager weblogMgr = roller.getWeblogManager();
            List cats = weblogMgr.getWeblogCategories(website, false);
            for (Iterator wbcItr = cats.iterator(); wbcItr.hasNext();) {
                WeblogCategoryData category = (WeblogCategoryData) wbcItr.next();
                result.put(category.getPath(), createCategoryStruct(category));
            }
            return result;
        }
        catch (Exception e)
        {
            String msg = "ERROR in MetaWeblogAPIHandler.getCategories";
            mLogger.error(msg,e);
            throw new XmlRpcException(UNKNOWN_EXCEPTION, msg);
        }
    }

    //------------------------------------------------------------------------

    /**
     * Edits a given post. Optionally, will publish the blog after making the edit
     *
     * @param postid Unique identifier of the post to be changed
     * @param userid Login for a MetaWeblog user who has permission to post to the blog
     * @param password Password for said username
     * @param struct Contents of the post
     * @param publish If true, the blog will be published immediately after the post is made
     * @throws org.apache.xmlrpc.XmlRpcException
     * @return
     */
    public boolean editPost(String postid, String userid, String password,
                            Hashtable struct, boolean publish)
                     throws Exception
    {
        mLogger.info("editPost() Called ========[ SUPPORTED ]=====");
        mLogger.info("     PostId: " + postid);
        mLogger.info("     UserId: " + userid);
        mLogger.info("    Publish: " + publish);

        validate(userid,password);

        Roller roller = RollerRequest.getRollerRequest().getRoller();

        Hashtable postcontent = struct;
        String description = (String)postcontent.get("description");
        String title = (String)postcontent.get("title");
        if (title == null) title = "";

        Date dateCreated = (Date)postcontent.get("dateCreated");
        if (dateCreated == null) dateCreated = (Date)postcontent.get("pubDate");

        String cat = null;
        if ( postcontent.get("categories") != null )
        {
            Vector cats = (Vector)postcontent.get("categories");
            cat = (String)cats.elementAt(0);
        }
        mLogger.info("      Title: " + title);
        mLogger.info("   Category: " + cat);

        try
        {
            WeblogManager weblogMgr = roller.getWeblogManager();

            Timestamp current =
                new Timestamp(System.currentTimeMillis());

            WeblogEntryData entry =
                weblogMgr.retrieveWeblogEntry(postid);

            if ( !title.equals("") ) entry.setTitle(title);
            entry.setText(description);
            entry.setUpdateTime(current);
            if (dateCreated != null) 
            {
                entry.setPubTime(new Timestamp(dateCreated.getTime()));
            }
            entry.setPublishEntry(Boolean.valueOf(publish));

            if ( cat != null )
            {
                // Use first category specified by request
                WeblogCategoryData cd = 
                    weblogMgr.getWeblogCategoryByPath(entry.getWebsite(), cat);
                entry.setCategory(cd);
            }

            entry.save();
            roller.commit();
            flushPageCache(userid);

            // TODO: Roller timestamps need better than 1 second accuracy
            // Until then, we can't allow more than one post per second
            Thread.sleep(1000);
            
            return true;
        }
        catch (Exception e)
        {
            String msg = "ERROR in MetaWeblogAPIHandler.editPost";
            mLogger.error(msg,e);
            throw new XmlRpcException(UNKNOWN_EXCEPTION, msg);
        }
    }

    //------------------------------------------------------------------------

    /**
     * Makes a new post to a designated blog. Optionally, will publish the blog after making the post
     *
     * @param blogid Unique identifier of the blog the post will be added to
     * @param userid Login for a MetaWeblog user who has permission to post to the blog
     * @param password Password for said username
     * @param struct Contents of the post
     * @param publish If true, the blog will be published immediately after the post is made
     * @throws org.apache.xmlrpc.XmlRpcException
     * @return
     */
    public String newPost(
        String blogid, String userid, String password, Hashtable struct, boolean publish)
        throws Exception
    {
        mLogger.info("newPost() Called ===========[ SUPPORTED ]=====");
        mLogger.info("     BlogId: " + blogid);
        mLogger.info("     UserId: " + userid);
        mLogger.info("    Publish: " + publish);

        WebsiteData website = validate(userid,password);

        Hashtable postcontent = struct;
        String description = (String)postcontent.get("description");
        String title = (String)postcontent.get("title");
        if (title == null) title = "";

        Date dateCreated = (Date)postcontent.get("dateCreated");
        if (dateCreated == null) dateCreated = (Date)postcontent.get("pubDate");
        if (dateCreated == null) dateCreated = new Date();

        String cat = null;
        if ( postcontent.get("categories") != null )
        {
            Vector cats = (Vector)postcontent.get("categories");
            if (cats.size() > 0) 
            {
                // only use the first category passed in
                cat = (String)cats.elementAt(0);
            }
        }
        mLogger.info("      Title: " + title);
        mLogger.info("   Category: " + cat);

        try
        {
            Roller roller = RollerRequest.getRollerRequest().getRoller();
            WeblogManager weblogMgr = roller.getWeblogManager();

            Timestamp current =
                new Timestamp(System.currentTimeMillis());

            WeblogEntryData entry = new WeblogEntryData();
            entry.setTitle(title);
            entry.setText(description);
            entry.setPubTime(new Timestamp(dateCreated.getTime()));
            entry.setUpdateTime(current);
            entry.setWebsite(website);
            entry.setPublishEntry(Boolean.valueOf(publish));