Re: Google Backend attached

[Lee Willis <lee leewillis co uk>]

On Wed, 2004-02-04 at 19:49, Don Smith wrote:

> Here's the google backend, that uses webservices.

I had some problems compiling your patch, which I fixed up, and re-wrote
some bits to make the code simpler to read. The revised
backend-google.cs is attached.

> There is a catch 
> however. Google limits each dev tag to 1000 searches per day so right 
> now it looks like each person would have to register for there own tag. 
> I saw something similar on the rhythmbox backend so i'm hoping this is 
> okay.

It's not really the same, the Amazon APIs used by the rhythmbox
backends:
(a) Don't force the use of a valid dev tag
(b) Don't put a limit on how many queries can be carried out per day for
a given dev tag.

I'm note sure therefore about how useful the google APIs actually are ..

Anyway - thanks for the work - it's really quite useful [If you have a
tag!]

Lee

//
// backend-google.cs: Google backend.
//
// Authors:
//     Don Smith 
//

using System;
using System.IO;
using System.Xml;
using System.Collections;
using System.Net;

namespace Dashboard {

	class Google : BackendSimple {
		
		public override bool Startup ()
		{
			this.Name = "Google";
			this.Category = "General";

			try {
				// Subscribe to artist clues
				this.SubscribeToClues ("keyword");

				this.Initialized = true;

				return true;
			} catch {
				return false;
			}
		}

		protected override ArrayList ProcessClueSimple (Clue clue)
		{

                        int max_results=10;
                        string dev_key="INSERT DEV TAG HERE";
                        int start_result=0;
                        bool dupe_filter=true;
                        bool safe_search=true;

                        if (! this.Initialized)
				return null;

			if (clue.Text.Length == 0)
				return null;

			ArrayList results = new ArrayList();
                        GoogleSearchResult gsr;
                        GoogleSearchService searchService = new GoogleSearchService(); 

                        try {
                        	gsr=searchService.doGoogleSearch(dev_key,
				                                 clue.Text,
								 start_result,
								 max_results,
								 dupe_filter,
								 "",
								 safe_search,
								 "", "", ""); 
                        } catch {
                        	return null;
                        }

                        for (int i=0; i < max_results; i++) {
                        	BackendResult GoogleResult = new BackendResult();
                        	GoogleResult.AddItem(new BackendResultItem("GoogleResult",
							                   gsr.resultElements[i].title,
									   "text",
									   "html",
									   gsr.resultElements[i].URL ));
                        	results.Add(GoogleResult); 
                        }
			if (results.Count > 0) {
				return results;
			} else {
				return null;
			}
                }	
	}
}