Quellcode-Bibliothek

^© Kompilation durch diese Firma

[Weder Korrektheit noch Funktionsfähigkeit der Software werden zugesichert.]

Datei: Geometry3.java Sprache: JAVA

///////////////////////////////////////////////////////////////////
// Copyright (c) 2001 Nebula Internet Software, LLC
///////////////////////////////////////////////////////////////////
import java.io.*;
import java.util.*;
import java.awt.*;

import javax.servlet.*;
import javax.servlet.http.*;

import com.nebulais.ossearch.*;

/**
* Servlet Interface of the OSSearch web site search system.
* @version v1.1
* @author Nebula Internet Software, LLC
*/
public class OSSearchServlet extends HttpServlet implements SingleThreadModel {
    private boolean is_error = false;
    private Exception err;

    private File rootPath;
    private String rootUrl;
    private Vector files;
    private Vector urls;

    private Vector results;

    private PrintWriter out;
    private String [] keywords;

    /**
     * Initialize the servlet
     */
    public void init(ServletConfig config) throws ServletException {
        super.init(config);

        try {
            // Read configuration file.
            files = new Vector();
            urls = new Vector();

            configure();
        } catch(Exception e) {
            is_error=true;
            err=e;
        }
    }

    /**
     * Returns blank search template
     */
    public void doGet(HttpServletRequest req, HttpServletResponse res)
    throws ServletException, IOException {
        // first, set the "content type" header of the response
        res.setContentType("text/html");

        // Get the response's PrintWriter to return text to the client.
        out = res.getWriter();

        // Print any error messages from initialization
        if(is_error) {
            error(err,"Error in Initialization:

" + err.toString());
        }

        File file = new File(OSSearchConstants.SERVLET_DIR,OSSearchConstants.TEMPLATE);

        StringBuffer text = new StringBuffer();

        results = new Vector();

        StringBuffer word = new StringBuffer();

        try {
            // Open template document.
            FileInputStream fis = new FileInputStream(file);
            BufferedInputStream bis = new BufferedInputStream(fis,1024);

            // Create results document from template
            int val;
            char c;
            boolean reading=false;
            byte [] line = new byte[1024];
            while((val=bis.read(line,0,1024))!=-1) {
                for(int b=0;b<val;b++) {
                    c = (char) line[b];
                    if(reading) {
                        if(c=='%') {
                            if(word.toString().equals("results")  ||
                                    word.toString().equals("keywords")) {
                                reading=false;
                            } else if(word.toString().equals("servlet_url")) {
                                text.append(OSSearchConstants.SERVLET_URL);
                                reading=false;
                            } else {
                                text.append("%");
                                text.append(word.toString());
                            }
                            word.setLength(0);
                        } else {
                            word.append(c);
                        }
                    } else if(c=='%') {
                        reading=true;
                    } else {
                        text.append(c);
                    }
                }
            }
            bis.close();
            if(reading) {
                text.append("%");
                text.append(word.toString());
            }

            // Write out the results document
            out.println(text.toString());

            out.close();
        } catch(FileNotFoundException e) {
            error(e,"Template not found: " + file + "

" + e.toString());
            return;
        }
        catch(Exception e) {
            error(e,e.toString() + "

" + text.toString());
            return;
        }
    }

    /**
     * Reads information from form and searches web documents.
     */
    public void doPost(HttpServletRequest req,
                       HttpServletResponse res) throws ServletException, IOException {

        // first, set the "content type" header of the response
        res.setContentType("text/html");

        // Get the response's PrintWriter to return text to the client.
        out = res.getWriter();

        File file = new File(OSSearchConstants.SERVLET_DIR,OSSearchConstants.TEMPLATE);

        StringBuffer text = new StringBuffer();

        results = new Vector();

        try {
            // Get the keywords
            String kw=req.getParameterValues("keywords")[0];
            StringTokenizer tok = new StringTokenizer(kw," -\t~!@#$%^&*()_+=[{]};:'\",.<>?/|\\",false);

            int len = tok.countTokens();
            Vector kwv = new Vector();
            for(int i=0;i<len;i++) {
                kw = tok.nextToken();
                if(isValidKeyword(kw)) {
                    kwv.addElement(kw);
                }
            }
            len = kwv.size();
            keywords = new String[len];
            for(int i=0;i<len;i++) {
             keywords[i] = kwv.elementAt(i).toString();
         }

            // Search web files and order into a list.
            int sz = files.size();
            String url;
            for(int i=0;i<sz;i++) {
                url = (String) urls.elementAt(i);
                try {
                    HTMLRankObj rank = new HTMLRankObj((File) files.elementAt(i),keywords,url);
                    insertResult(rank);
                } catch(RankException e) {
                    error(e,e.getMessage());
                    return;
                }
            }

            // Open template document.
            StringBuffer word = new StringBuffer();
            FileInputStream fis = new FileInputStream(file);
            BufferedInputStream bis = new BufferedInputStream(fis,1024);

            // Create results document from template
            int val;
            char c;
            boolean reading=false;
            byte [] line = new byte[1024];
            while((val=bis.read(line,0,1024))!=-1) {
                for(int b=0;b<val;b++) {
                    c = (char) line[b];
                    if(reading) {
                        if(c=='%') {
                            if(word.toString().equals("results")) {
                                HTMLRankObj obj;
                                sz = Math.min(results.size(),15);
                                if(sz==0) {
                                    text.append("No Document Found");
                                }
                                for(int i=0;i<sz;i++) {
                                    obj = (HTMLRankObj) results.elementAt(i);
                                    text.append((new Integer(i+1)).toString());
                                    text.append(". ");
                                    text.append(obj.getURL());
                                    text.append("\">");
                                    text.append(obj.getTitle());
                                    text.append("");
                                    text.append("
\n");
                                }
                                reading=false;
                            } else if(word.toString().equals("keywords")) {
                                for(int i=0;i<len;i++) {
                                    text.append(keywords[i]);
                                    if(i<len-1) {
                                        text.append(" ");
                                    }
                                }
                                reading=false;
                            } else if(word.toString().equals("servlet_url")) {
                                text.append(OSSearchConstants.SERVLET_URL);
                                reading=false;
                            } else {
                                text.append("%");
                                text.append(word.toString());
                            }
                            word.setLength(0);
                        } else {
                            word.append(c);
                        }
                    } else if(c=='%') {
                        reading=true;
                    } else {
                        text.append(c);
                    }
                }
            }
            bis.close();
            if(reading) {
                text.append("%");
                text.append(word.toString());
            }

            // Write out the results document
            out.println(text.toString());

            out.close();
        } catch(FileNotFoundException e) {
            error(e,"Template not found: " + file + "

" + e.toString());
            return;
        }
        catch(Exception e) {
            error(e,e.toString() + "

" + text.toString());
            return;
        }
    }

    /**
     * Reads configuration file.
     */
    public void configure() throws IOException {
        File file = new File(OSSearchConstants.SERVLET_DIR,"data/ossearch/ossearch.cfg");

        FileInputStream fis = new FileInputStream(file);
        BufferedInputStream bis = new BufferedInputStream(fis,1024);

        int val;
        char c;
        StringTokenizer tokenizer;
        StringBuffer temp = new StringBuffer();
        String word;
        Boolean recursive = new Boolean(false);
        Vector extensions=new Vector();
        Vector exDirs=new Vector();
        Vector exFiles=new Vector();
        boolean readingKeyword=false;
        boolean readingUrl=false;
        boolean readingPath=false;
        boolean readingRecursive=false;
        boolean readingExtensions=false;
        boolean readingExDirs=false;
        boolean readingExFiles=false;
        boolean end=false;
        byte [] line = new byte[1024];
        while(!end && (val=bis.read(line,0,1024))!=-1) {
            for(int b=0;b<val;b++) {
                c = (char) line[b];
                if(c=='#' || isWhiteSpace(c)) {
                    if(readingKeyword) {
                        word=temp.toString();
                        if(word.compareTo("root_url")==0) {
                            readingUrl=true;
                        } else if(word.compareTo("root_path")==0) {
                            readingPath=true;
                        } else if(word.compareTo("recursive")==0) {
                            readingRecursive=true;
                        } else if(word.compareTo("extensions")==0) {
                            readingExtensions=true;
                        } else if(word.compareTo("exclude_dirs")==0) {
                            readingExDirs=true;
                        } else if(word.compareTo("exclude_files")==0) {
                            readingExFiles=true;
                        } else if(word.compareTo("end")==0) {
                            end=true;
                            break;
                        }
                        readingKeyword=false;
                        temp.setLength(0);
                    } else if(readingUrl && temp.length()!=0) {
                        rootUrl=temp.toString();
                        if(!rootUrl.endsWith("/")) {
                            rootUrl += "/";
                        }
                        readingUrl=false;
                        temp.setLength(0);
                    } else if(readingPath && temp.length()!=0) {
                        rootPath=new File(temp.toString());
                        readingPath=false;
                        temp.setLength(0);
                    } else if(readingRecursive && temp.length()!=0) {
                        recursive=new Boolean(temp.toString().trim());
                        readingRecursive=false;
                        temp.setLength(0);
                    } else if(readingExtensions && temp.length()!=0) {
                        extensions.addElement(temp.toString());
                        temp.setLength(0);
                    } else if(readingExDirs && temp.length()!=0) {
                        exDirs.addElement(temp.toString());
                        temp.setLength(0);
                    } else if(readingExFiles && temp.length()!=0) {
                        exFiles.addElement(temp.toString());
                        temp.setLength(0);
                    }
                    if(c=='#') {
                        readingKeyword=true;
                        readingExtensions=false;
                        readingExDirs=false;
                        readingExFiles=false;
                    }
                } else {
                    temp.append(c);
                }
            }
        }
        bis.close();

        list(new GenericFileFilter(rootPath,extensions,exFiles),rootPath,"",exDirs,recursive.booleanValue());
    }

    /**
     * List the files in the given directory
     * @param filter GenericFileFilter to use
     * @param dir Directory to list
     * @param rel Relative path from the root directory
     * @param exclude Directories to exclude
     * @param recursive True, if directories should be recursively listed.
     */
    public void list(GenericFileFilter filter, File dir, String rel, Vector exclude, boolean recursive) throws IOException {
        // Add to files and urls list
        String [] ls = dir.list(filter);
        int sz = ls.length;
        for(int i=0;i<sz;i++) {
            files.addElement(new File(dir,ls[i]));
            urls.addElement(rootUrl + rel + ls[i]);
        }

        // Recursively list
        if(recursive) {
            ls = dir.list(new DirectoryFilter(dir,exclude));
            sz = ls.length;
            for(int i=0;i<sz;i++) {
                list(filter,new File(dir,ls[i]),rel + ls[i] + "/",exclude,recursive);
            }
        }
    }

    /**
     * Returns an error message back to the web browser
     * @param ex Exception for printing the stack (passing null will cause the stack not to be printed)
     * @param error Message to display in error message.
     */
    public void error(Exception ex, String error) {
        String text = "ErrorError occured!";
        text += "

Please report error to mailto:[email protected]?subject=Quote-a-Price Error\">";
        text += "[email protected].

Use \"Back\" arrow to continue\n";
        text += "

";
        text += error;
        out.println(text);
        if(ex!=null) {
            ex.printStackTrace(out);
        }
        text = "";
        out.println(text);
    }

    /**
     * Insert a search result into the results list
     * @param obj HTMLRankObj to insert into the results list.
     */
    public void insertResult(HTMLRankObj obj) {
        double score = obj.getScore();
        double test;
        int sz = results.size();
        boolean inserted=false;
        if(score>0.0) {
            for(int i=0;i<sz;i++) {
                test = ((HTMLRankObj) results.elementAt(i)).getScore();
                if(score>test) {
                    results.insertElementAt(obj,i);
                    inserted=true;
                    break;
                }
            }
            if(!inserted) {
                results.addElement(obj);
            }
        }
    }

    /**
     * Is the string a valid keyword or should it be excluded?
     */
    public boolean isValidKeyword(String kw) {
        int sz;
        if(kw.length()<=1) {
            return false;
        } else if(kw.length()==2) {
            sz = OSSearchConstants.EXCLUDE_2.length;
            for(int i=0;i<sz;i++) {
                if(kw.compareTo(OSSearchConstants.EXCLUDE_2[i])==0) {
                    return false;
                }
            }
        } else if(kw.length()==3) {
            sz = OSSearchConstants.EXCLUDE_3.length;
            for(int i=0;i<sz;i++) {
                if(kw.compareTo(OSSearchConstants.EXCLUDE_3[i])==0) {
                    return false;
                }
            }
        } else if(kw.length()==4) {
            sz = OSSearchConstants.EXCLUDE_4.length;
            for(int i=0;i<sz;i++) {
                if(kw.compareTo(OSSearchConstants.EXCLUDE_4[i])==0) {
                    return false;
                }
            }
        } else if(kw.length()==5) {
            sz = OSSearchConstants.EXCLUDE_5.length;
            for(int i=0;i<sz;i++) {
                if(kw.compareTo(OSSearchConstants.EXCLUDE_5[i])==0) {
                    return false;
                }
            }
        } else if(kw.length()==6) {
            sz = OSSearchConstants.EXCLUDE_6.length;
            for(int i=0;i<sz;i++) {
                if(kw.compareTo(OSSearchConstants.EXCLUDE_6[i])==0) {
                    return false;
                }
            }
        }
        return true;
    }

    /**
     * Is the given character a whitespace character?
     */
    public boolean isWhiteSpace(char c) {
        if(c==' ' || c=='\r' || c=='\n' || c=='\t') {
            return(true);
        } else {
            return(false);
        }
    }
}

¤ Dauer der Verarbeitung: 0.52 Sekunden (vorverarbeitet) ¤

Download des Quellennavigators
Download des sprechenden Kalenders
Eigene Datei ansehen

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.