private static async Task <SchemaFeatures> GetSchemaFeaturesAsync(
HttpClient httpClient,
HttpQueryClient queryClient)
{
var features = new SchemaFeatures();
var request = new HttpQueryRequest
{
Query = GetIntrospectionQuery(_phase1)
};
string json = await queryClient.FetchStringAsync(
request, httpClient)
.ConfigureAwait(false);
IntrospectionResult result =
JsonConvert.DeserializeObject <IntrospectionResult>(json);
FullType directive = result.Data.Schema.Types.First(t =>
t.Name.Equals(_directiveName, StringComparison.Ordinal));
features.HasRepeatableDirectives = directive.Fields.Any(t =>
t.Name.Equals(_isRepeatable, StringComparison.Ordinal));
features.HasDirectiveLocations = directive.Fields.Any(t =>
t.Name.Equals(_locations, StringComparison.Ordinal));
FullType schema = result.Data.Schema.Types.First(t =>
t.Name.Equals(_schemaName, StringComparison.Ordinal));
features.HasSubscriptionSupport = schema.Fields.Any(t =>
t.Name.Equals(_subscriptionType, StringComparison.Ordinal));
return(features);
}
public static IStitchingBuilder AddSchemaFromHttp(
this IStitchingBuilder builder,
NameString name)
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
name.EnsureNotEmpty(nameof(name));
builder.AddSchema(name, s =>
{
HttpClient httpClient =
s.GetRequiredService <IHttpClientFactory>()
.CreateClient(name);
var request = new HttpQueryRequest
{
Query = _introspectionQuery
};
var queryClient = new HttpQueryClient();
string result = Task.Factory.StartNew(
() => queryClient.FetchStringAsync(request, httpClient))
.Unwrap().GetAwaiter().GetResult();
return(IntrospectionDeserializer.Deserialize(result));
});
return(builder);
}
private static async Task <DocumentNode> ExecuteIntrospectionAsync(
HttpClient httpClient,
HttpQueryClient queryClient,
SchemaFeatures features)
{
DocumentNode query = CreateIntrospectionQuery(features);
var request = new HttpQueryRequest
{
Query = QuerySyntaxSerializer.Serialize(query)
};
string json = await queryClient.FetchStringAsync(
request, httpClient)
.ConfigureAwait(false);
return(IntrospectionDeserializer.Deserialize(json));
}
private static async Task <DocumentNode> ExecuteIntrospectionAsync(
HttpClient httpClient,
HttpQueryClient queryClient,
SchemaFeatures features)
{
DocumentNode query = CreateIntrospectionQuery(features);
var request = new HttpQueryRequest
{
Query = QuerySyntaxSerializer.Serialize(query),
OperationName = "introspection_phase_2"
};
(string json, HttpResponseMessage _)response =
await queryClient.FetchStringAsync(
request, httpClient)
.ConfigureAwait(false);
return(IntrospectionDeserializer.Deserialize(response.json));
}
