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GoogleServlet.javaAPI DocExample3086Thu Aug 21 09:10:54 BST 2003com.jspservletcookbook

GoogleServlet

public class GoogleServlet extends HttpServlet

Fields Summary
Constructors Summary
Methods Summary
public voiddoGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)

    
	//set the MIME type of the response, "text/html"
    response.setContentType("text/html");
	
	//use a PrintWriter send text data to the client who has requested the servlet
    java.io.PrintWriter out = response.getWriter();
	
	//Begin assembling the HTML content
    out.println("<html><head>");
    
    out.println("<title>Initiate a Google Search</title></head><body>");
    out.println("<h2>Please enter your search terms</h2>");
   
   //make sure method="POST" so that the servlet service method
   //calls doPost in the response to this form submit
    out.println(
        "<form method=\"POST\" action =\"" + request.getContextPath() +
            "/googleservlet\" >");

    out.println("<table border=\"0\"><tr><td valign=\"top\">");
    out.println("Search terms: </td>  <td valign=\"top\">");
    out.println("<input type=\"text\" name=\"query\" size=\"15\">");
    out.println("</td></tr><tr><td valign=\"top\">");
	
	out.println("Restrict to Google sub-site... </td>  <td valign=\"top\">");
    out.println("<select name=\"restrict\"><option selected>none</option><option>unclesam</option><option>linux</option><option>mac</option><option>bsd</option></select>");
    out.println("</td></tr><tr><td valign=\"top\">");

    out.println("<input type=\"submit\" value=\"Submit Info\"></td></tr>");
    out.println("</table></form>");
    out.println("</body></html>");
	
    out.close();
public voiddoPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)

	   
	String query = request.getParameter("query");
	String restrict = request.getParameter("restrict");
	
	boolean isValid = (query == null || query.length() < 1) ? false : true;

	//set the MIME type of the response, "text/html"
    response.setContentType("text/html");
	
    //use a PrintWriter send text data to the client who has requested the servlet
    java.io.PrintWriter out = response.getWriter();
	
	//Begin assembling the HTML content
    out.println("<html><head>");
    out.println("<title>Google results</title></head><body>");
	
	if (! isValid){
	    out.println("<h2>Sorry, the query parameter was either empty or null</h2>");
	} else {
	
	    out.println("<h2>Here are your search results</h2>");
	    
		GoogleBean gb = new GoogleBean();
	    gb.setFilter(true);
	    //For the web: 
		gb.setLineSep("<br /><br />");
		
		if (restrict != null && restrict.length() > 0)
		    gb.setRestrict(restrict);
			
	    gb.setQuery(query);
	    
		try {
	    out.println( gb.getSearchResults() );
		} catch (Exception e){
		
		    throw new ServletException( e.getMessage() );
		
		}
		
		
	}
	
		
	out.println("</body></html>");
	
    out.close();