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Adds GraphQL SSE support to StrawberryShake (#6401)
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6 changes: 6 additions & 0 deletions
6
src/StrawberryShake/Client/src/Resources/Properties/Resources.Designer.cs
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212 changes: 179 additions & 33 deletions
212
src/StrawberryShake/Client/src/Transport.Http/HttpConnection.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,74 +1,220 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Net.Http; | ||
| using System.Net.Http.Headers; | ||
| using System.Net.Http.Json; | ||
| using System.Text; | ||
| using System.Text.Json; | ||
| using StrawberryShake.Internal; | ||
| using HotChocolate.Transport.Http; | ||
| using HotChocolate.Utilities; | ||
| using StrawberryShake.Json; | ||
| using static StrawberryShake.Properties.Resources; | ||
| using static StrawberryShake.Transport.Http.ResponseEnumerable; | ||
|
|
||
| namespace StrawberryShake.Transport.Http; | ||
|
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| public sealed class HttpConnection : IHttpConnection | ||
| { | ||
| private readonly Func<HttpClient> _createClient; | ||
| private readonly JsonOperationRequestSerializer _serializer = new(); | ||
|
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| public HttpConnection(Func<HttpClient> createClient) | ||
| { | ||
| _createClient = createClient ?? throw new ArgumentNullException(nameof(createClient)); | ||
| } | ||
|
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| public IAsyncEnumerable<Response<JsonDocument>> ExecuteAsync(OperationRequest request) | ||
| => Create(_createClient, () => CreateRequestMessage(request)); | ||
| => Create(_createClient, () => MapRequest(request)); | ||
|
|
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| private HttpRequestMessage CreateRequestMessage(OperationRequest request) | ||
| private static GraphQLHttpRequest MapRequest(OperationRequest request) | ||
| { | ||
| var operation = CreateRequestMessageBody(request); | ||
| var (id, name, document, variables, extensions, _, files, _) = request; | ||
|
|
||
| var content = request.Files.Count == 0 | ||
| ? CreateRequestContent(operation) | ||
| : CreateMultipartContent(request, operation); | ||
| #if NETSTANDARD2_0 | ||
| var body = Encoding.UTF8.GetString(document.Body.ToArray()); | ||
| #else | ||
| var body = Encoding.UTF8.GetString(document.Body); | ||
| #endif | ||
|
|
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| return new HttpRequestMessage { Method = HttpMethod.Post, Content = content }; | ||
| var hasFiles = files is { Count: > 0 }; | ||
|
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| variables = MapVariables(variables); | ||
| if (hasFiles && variables is not null) | ||
| { | ||
| variables = MapFilesToVariables(variables, files!); | ||
| } | ||
|
|
||
| var operation = | ||
| new HotChocolate.Transport.OperationRequest(body, id, name, variables, extensions); | ||
|
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| return new GraphQLHttpRequest(operation) { EnableFileUploads = hasFiles }; | ||
| } | ||
|
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| private byte[] CreateRequestMessageBody(OperationRequest request) | ||
| /// <summary> | ||
| /// Converts the variables into a dictionary that can be serialized. This is necessary | ||
| /// because the variables can contain lists of key value pairs which are not supported | ||
| /// by HotChocolate.Transport.Http | ||
| /// </summary> | ||
| /// <remarks> | ||
| /// We only convert the variables if necessary to avoid unnecessary allocations. | ||
| /// </remarks> | ||
| private static IReadOnlyDictionary<string, object?>? MapVariables( | ||
| IReadOnlyDictionary<string, object?> variables) | ||
| { | ||
| using var arrayWriter = new ArrayWriter(); | ||
| _serializer.Serialize(request, arrayWriter); | ||
| var buffer = new byte[arrayWriter.Length]; | ||
| arrayWriter.Body.Span.CopyTo(buffer); | ||
| return buffer; | ||
| if (variables.Count == 0) | ||
| { | ||
| return null; | ||
| } | ||
|
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| Dictionary<string, object?>? copy = null; | ||
| foreach (var variable in variables) | ||
| { | ||
| var value = variable.Value; | ||
| // the value can be a List<T> of key value pairs and not only a dictionary. We do expect | ||
| // to just have lists here, but in case we have a dictionary this should also just work. | ||
| if (value is IEnumerable<KeyValuePair<string, object?>> items) | ||
| { | ||
| copy ??= CreateDictionary(variables); | ||
|
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| value = MapVariables(CreateDictionary(items)); | ||
| } | ||
| else if (value is List<object?> list) | ||
| { | ||
| // the lists are mutable so we can just update the value in the list | ||
| MapVariables(list); | ||
| } | ||
|
|
||
| if (copy is not null) | ||
| { | ||
| copy[variable.Key] = value; | ||
| } | ||
| } | ||
|
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| return copy ?? variables; | ||
| } | ||
|
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| private static HttpContent CreateRequestContent(byte[] operation) | ||
| private static void MapVariables(List<object?> variables) | ||
| { | ||
| var content = new ByteArrayContent(operation); | ||
| content.Headers.ContentType = new MediaTypeHeaderValue("application/json"); | ||
| return content; | ||
| if (variables.Count == 0) | ||
| { | ||
| return; | ||
| } | ||
|
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| for (var index = 0; index < variables.Count; index++) | ||
| { | ||
| switch (variables[index]) | ||
| { | ||
| case IEnumerable<KeyValuePair<string, object?>> items: | ||
| variables[index] = MapVariables(CreateDictionary(items)); | ||
| break; | ||
|
|
||
| case List<object?> list: | ||
| MapVariables(list); | ||
| break; | ||
| } | ||
| } | ||
| } | ||
|
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| private static HttpContent CreateMultipartContent(OperationRequest request, byte[] operation) | ||
| private static Dictionary<string, object?> CreateDictionary( | ||
| IEnumerable<KeyValuePair<string, object?>> values) | ||
| { | ||
| var fileMap = new Dictionary<string, string[]>(); | ||
| var form = new MultipartFormDataContent | ||
| #if NETSTANDARD2_0 | ||
| var dictionary = new Dictionary<string, object?>(); | ||
|
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| foreach (var value in values) | ||
| { | ||
| { new ByteArrayContent(operation), "operations" }, | ||
| { JsonContent.Create(fileMap), "map" } | ||
| }; | ||
| dictionary[value.Key] = value.Value; | ||
| } | ||
|
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| foreach (var file in request.Files) | ||
| return dictionary; | ||
| #else | ||
| return new Dictionary<string, object?>(values); | ||
| #endif | ||
| } | ||
|
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| private static IReadOnlyDictionary<string, object?> MapFilesToVariables( | ||
| IReadOnlyDictionary<string, object?> variables, | ||
| IReadOnlyDictionary<string, Upload?> files) | ||
| { | ||
| foreach (var file in files) | ||
| { | ||
| if (file.Value is { } fileContent) | ||
| var path = file.Key; | ||
| var upload = file.Value; | ||
|
|
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| if (!upload.HasValue) | ||
| { | ||
| continue; | ||
| } | ||
|
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| var currentPath = path.Substring("variables.".Length); | ||
| object? currentObject = variables; | ||
| int index; | ||
| while ((index = currentPath.IndexOf('.')) >= 0) | ||
| { | ||
| var identifier = (fileMap.Count + 1).ToString(); | ||
| fileMap.Add(identifier, new[] { file.Key }); | ||
| form.Add(new StreamContent(fileContent.Content), identifier, fileContent.FileName); | ||
| var segment = currentPath.Substring(0, index); | ||
| switch (currentObject) | ||
| { | ||
| case Dictionary<string, object> dictionary: | ||
| if (!dictionary.TryGetValue(segment, out currentObject)) | ||
| { | ||
| throw new InvalidOperationException( | ||
| string.Format(HttpConnection_FileMapDoesNotMatch, path)); | ||
| } | ||
|
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||
| break; | ||
|
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| case List<object> array: | ||
| if (!int.TryParse(segment, out var arrayIndex)) | ||
| { | ||
| throw new InvalidOperationException( | ||
| string.Format(HttpConnection_FileMapDoesNotMatch, path)); | ||
| } | ||
|
|
||
| if (arrayIndex >= array.Count) | ||
| { | ||
| throw new InvalidOperationException( | ||
| string.Format(HttpConnection_FileMapDoesNotMatch, path)); | ||
| } | ||
|
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| currentObject = array[arrayIndex]; | ||
| break; | ||
|
|
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| default: | ||
| throw new InvalidOperationException( | ||
| string.Format(HttpConnection_FileMapDoesNotMatch, path)); | ||
| } | ||
|
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| currentPath = currentPath.Substring(index + 1); | ||
| } | ||
|
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| switch (currentObject) | ||
| { | ||
| case Dictionary<string, object> result: | ||
| result[currentPath] = | ||
| new FileReference(upload.Value.Content, upload.Value.FileName); | ||
| break; | ||
|
|
||
| case List<object> array: | ||
| if (!int.TryParse(currentPath, out var arrayIndex)) | ||
| { | ||
| throw new InvalidOperationException( | ||
| string.Format(HttpConnection_FileMapDoesNotMatch, path)); | ||
| } | ||
|
|
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| if (arrayIndex >= array.Count) | ||
| { | ||
| throw new InvalidOperationException( | ||
| string.Format(HttpConnection_FileMapDoesNotMatch, path)); | ||
| } | ||
|
|
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| array[arrayIndex] = | ||
| new FileReference(upload.Value.Content, upload.Value.FileName); | ||
|
|
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| break; | ||
|
|
||
| default: | ||
| throw new InvalidOperationException( | ||
| string.Format(HttpConnection_FileMapDoesNotMatch, path)); | ||
| } | ||
| } | ||
|
|
||
| return form; | ||
| return variables; | ||
| } | ||
| } |
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