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