112 lines
4.1 KiB
C#
112 lines
4.1 KiB
C#
// Copyright 2022 The Nakama Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using System;
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using System.Collections.Generic;
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using System.Threading;
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using System.Threading.Tasks;
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using Nakama.TinyJson;
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using Godot;
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namespace Nakama {
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/// <summary>
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/// An HTTP adapter which uses Godot's HTTPRequest node.
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/// </summary>
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/// <remarks>
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/// Note Content-Type header is always set as 'application/json'.
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/// </remarks>
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public partial class GodotHttpAdapter : Node, IHttpAdapter {
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/// <inheritdoc cref="IHttpAdapter.Logger"/>
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public ILogger Logger { get; set; }
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/// <inheritdoc cref="IHttpAdapter.TransientExceptionDelegate"/>
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public TransientExceptionDelegate TransientExceptionDelegate => IsTransientException;
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/// <inheritdoc cref="IHttpAdapter"/>
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public async Task<string> SendAsync(string method, Uri uri, IDictionary<string, string> headers,
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byte[] body, int timeout, CancellationToken? cancellationToken)
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{
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var req = new HTTPRequest();
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req.Timeout = timeout;
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if (OS.GetName() != "HTML5") {
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req.UseThreads = true;
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}
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var godot_method = HTTPClient.Method.Get;
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if (method == "POST") {
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godot_method = HTTPClient.Method.Post;
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}
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else if (method == "PUT") {
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godot_method = HTTPClient.Method.Put;
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}
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else if (method == "DELETE") {
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godot_method = HTTPClient.Method.Delete;
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}
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else if (method == "HEAD") {
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godot_method = HTTPClient.Method.Head;
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}
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var headers_array = new String[headers.Count + 1];
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headers_array[0] = "Accept: application/json";
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int index = 1;
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foreach (var item in headers) {
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headers_array[index] = item.Key + ": " + item.Value;
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index++;
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}
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string body_string = body != null ? System.Text.Encoding.UTF8.GetString(body) : "";
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AddChild(req);
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req.Request(uri.ToString(), headers_array, true, godot_method, body_string);
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Logger?.InfoFormat("Send: method='{0}', uri='{1}', body='{2}'", method, uri, body_string);
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Variant[] resultObjects = await ToSignal(req, "request_completed");
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HTTPRequest.Result result = (HTTPRequest.Result)(long)resultObjects[0];
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long response_code = (long)resultObjects[1];
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string response_body = System.Text.Encoding.UTF8.GetString((byte[])resultObjects[3]);
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req.QueueFree();
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Logger?.InfoFormat("Received: status={0}, contents='{1}'", response_code, response_body);
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if (result == HTTPRequest.Result.Success && response_code >= 200 && response_code <= 299) {
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return response_body;
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}
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var decoded = response_body.FromJson<Dictionary<string, object>>();
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string message = decoded.ContainsKey("message") ? decoded["message"].ToString() : string.Empty;
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int grpcCode = decoded.ContainsKey("code") ? (int) decoded["code"] : -1;
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var exception = new ApiResponseException(response_code, message, grpcCode);
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if (decoded.ContainsKey("error"))
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{
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IHttpAdapterUtil.CopyResponseError(this, decoded["error"], exception);
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}
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throw exception;
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}
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private static bool IsTransientException(Exception e) {
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return e is ApiResponseException apiException && (apiException.StatusCode >= 500 || apiException.StatusCode == -1);
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}
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}
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}
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