public ISnippetReader GetSnippet(string[] query_terms, Hit hit, bool full_text, int ctx_length, int snp_length)
{
string source = hit ["beagle:Source"];
hit ["beagle:Source"] = hit ["beagle:OrigSource"];
string network_node = hit ["beagle:NetworkNode"];
SnippetReader snippet_reader = null;
// FIXME: Creating a snippet request, registering transports, all of this
// doing everytime for hundreds of hits may become quite expensive.
// In that case, pre generate one snippetrequest and use it over and over.
// Form a correct snippet request
SnippetRequest sreq = new SnippetRequest();
sreq.Hit = hit;
sreq.QueryTerms = query_terms;
sreq.FullText = full_text;
sreq.ContextLength = ctx_length;
sreq.SnippetLength = snp_length;
// fake a blocking snippet retrieval
sreq.RegisterAsyncResponseHandler(typeof(SnippetResponse),
delegate(ResponseMessage response) {
if (response is ErrorResponse)
{
Log.Error("Error retrieval snippet for {0} from network node {1}", hit.Uri, network_node);
return;
}
snippet_reader = new SnippetReader((SnippetResponse)response);
});
List <string[]> network_services = Conf.Networking.GetListOptionValues(Conf.Names.NetworkServices);
foreach (string[] service in network_services)
{
if (network_node != service [0])
{
continue;
}
sreq.Transports.Clear();
sreq.RegisterTransport(new HttpTransport(service [1]));
// fake a blocking snippet retrieval
try {
sreq.SendAsyncBlocking();
} catch (Exception e) {
Log.Debug(e, "Error while requesting snippet from {0} for {1}", service [1], hit.Uri);
}
break;
}
hit ["beagle:Source"] = source; // reset source
return(snippet_reader);
}
protected void RequestSnippet ()
{
if (snippet != null) {
EmitGotSnippet ();
} else {
SnippetRequest sreq = new SnippetRequest (query, hit);
sreq.RegisterAsyncResponseHandler (typeof (SnippetResponse), SnippetResponseReceived);
sreq.SendAsync ();
}
}