public Task <SearchResponse <T> > SearchAsync <T>(SearchRequest request)
{
var queryString = HttpUtility.ParseQueryString(String.Empty);
var info = new SearchInfo();
if (request.Query != null)
{
queryString["q"] = info.Query = request.Query.Definition;
queryString["q.parser"] = info.Parser = request.Query.Parser;
}
if (request.Filter != null)
{
queryString["fq"] = info.Filter = request.Filter.Definition;
}
if (request.Start.HasValue)
{
queryString["start"] = info.Start = request.Start.ToString();
}
if (request.Size.HasValue)
{
queryString["size"] = info.Size = request.Size.ToString();
}
if (request.Sort.Any())
{
queryString["sort"] = info.Sort = string.Join(",", request.Sort);
}
if (request.Return.Any())
{
queryString["return"] = info.Return = string.Join(",", request.Return);
}
info.Facets = request.Facets.Select(facet =>
{
var queryParamName = string.Format("facet.{0}", facet.Field.Name);
var queryParamValue = facet.Definition;
queryString[queryParamName] = queryParamValue;
return(new KeyValuePair <string, string>(queryParamName, queryParamValue));
}).ToArray();
info.Expressions = request.Expressions.Select(expression =>
{
var queryParamName = string.Format("expr.{0}", expression.Name);
var queryParamValue = expression.Definition;
queryString[queryParamName] = queryParamValue;
return(new KeyValuePair <string, string>(queryParamName, queryParamValue));
}).ToArray();
return(RunSearch <T>(_searchClient, "search", queryString, info));
}
/// <summary>
/// Initializes a new instance of <see cref="SearchException" /> with the given info, status
/// code, and message.
/// </summary>
public SearchException(SearchInfo request, HttpStatusCode httpStatusCode, string message)
: base(httpStatusCode, message)
{
Request = request;
}
/// <summary>
/// Initializes a new instance of <see cref="SearchException" /> with the given info, status
/// code, and message.
/// </summary>
public SearchException(SearchInfo request, HttpStatusCode httpStatusCode, string message)
: base(httpStatusCode, message)
{
Request = request;
}
Exception HandleSearchError(HttpResponseMessage httpResponse, JsonTextReader jsonReader, SearchInfo info)
{
// TODO: 500 level errors should be marked Retry
// TODO: 400 level errors should be marked as bad input.
// TODO: Backoffs etc
// http://docs.aws.amazon.com/cloudsearch/latest/developerguide/error-handling.html
// http://docs.aws.amazon.com/general/latest/gr/api-retries.html
var response = _responseDeserializer.Deserialize <SearchErrorResponse>(jsonReader);
return(new SearchException(info, httpResponse.StatusCode, response.Message));
}
async Task <SearchResponse <T> > RunSearch <T>(HttpClient httpClient, string url, NameValueCollection queryString, SearchInfo info)
{
if (queryString != null)
{
url = info.Url = string.Format("{0}?{1}", url, queryString);
}
using (var httpResponse = await httpClient.GetAsync(url).ConfigureAwait(false))
{
using (var content = await httpResponse.Content.ReadAsStreamAsync().ConfigureAwait(false))
using (var streamReader = new StreamReader(content, Encoding.UTF8))
using (var jsonReader = new JsonTextReader(streamReader))
{
if (!httpResponse.IsSuccessStatusCode)
{
throw HandleSearchError(httpResponse, jsonReader, info);
}
var response = _jsonSerializer.Deserialize <SearchResponse <T> >(jsonReader);
response.Request = info;
return(response);
}
}
}