private Uri MakeUriForSearching(VeNomQuery query)
{
var encoded = HttpUtility.UrlEncode(query.SearchExpression);
var searchBase = _sessionAddress + "search/" + encoded;
var queryStringParameters = new Dictionary <string, string>();
if (query.FilterSubset.Count > 0) //server expects this format subset=[1,9,3]
{
queryStringParameters["subset"] = query.FilterSubset.Aggregate("[", (acc, id) => String.Format("{0}{1},", acc, id)).TrimEnd(',') + "]";
}
if (query.Skip.HasValue)
{
queryStringParameters["skip"] = query.Skip.Value.ToString();
}
if (query.Take.HasValue)
{
queryStringParameters["take"] = query.Take.Value.ToString();
}
if (!queryStringParameters.Any())
{
return(new Uri(searchBase));
}
var queryString = queryStringParameters.Aggregate("?", (acc, kv) => String.Format("{0}{1}={2}&", acc, kv.Key, kv.Value)).TrimEnd('&');
return(new Uri(searchBase + queryString));
}
/// <summary>
/// Asynchronously queries the VetCompass webservice. The task can be used for error detection/handling. This call
/// won't block or throw an exception.
/// </summary>
/// <param name="query"></param>
/// <returns></returns>
public Task <VeNomQueryResponse> QueryAsync(VeNomQuery query)
{
var cancellationTokenSource = new CancellationTokenSource();
var task = _sessionCreationTask.FlatMapSuccess(_ => Query(query), cancellationTokenSource.Token);
return(HonourTimeout(task, cancellationTokenSource));
}
/// <summary>
/// Queries the VetCompass webservice synchronously. This will block your thread, instead prefer QueryAsync. This
/// method will also throw an exception on a failure.
/// </summary>
/// <param name="query"></param>
/// <returns></returns>
public VeNomQueryResponse QuerySynch(VeNomQuery query)
{
var queryAsync = QueryAsync(query);
Task.WaitAny(queryAsync); //will throw on a task fault
return(queryAsync.Result);
}
/// <summary>
/// This does the actual query call to the server
/// </summary>
/// <param name="query"></param>
/// <returns></returns>
private Task <VeNomQueryResponse> Query(VeNomQuery query)
{
var searchBase = MakeUriForSearching(query);
var request = CreateRequest(searchBase);
request.Method = WebRequestMethods.Http.Get;
request.Accept = "application/json";
var task = request.GetResponseAsync();
return(task.MapSuccess(DeserialiseQueryReponse));
}