65 lines
2.8 KiB
C#
65 lines
2.8 KiB
C#
using System.Net.Http.Headers;
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using Foxchat.Core.Models;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Serialization;
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namespace Foxchat.Core.Federation;
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public partial class RequestSigningService
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{
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public const string USER_AGENT_HEADER = "User-Agent";
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public const string USER_AGENT = "Foxchat.NET";
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public const string DATE_HEADER = "Date";
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public const string SERVER_HEADER = "X-Foxchat-Server";
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public const string SIGNATURE_HEADER = "X-Foxchat-Signature";
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public const string USER_HEADER = "X-Foxchat-User";
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private static readonly JsonSerializerSettings _jsonSerializerSettings = new()
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{
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ContractResolver = new DefaultContractResolver
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{
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NamingStrategy = new SnakeCaseNamingStrategy()
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}
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};
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public async Task<T> RequestAsync<T>(HttpMethod method, string domain, string requestPath, string? userId = null, object? body = null)
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{
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var request = BuildHttpRequest(method, domain, requestPath, userId, body);
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var resp = await _httpClient.SendAsync(request);
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if (!resp.IsSuccessStatusCode)
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{
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var error = await resp.Content.ReadAsStringAsync();
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throw new ApiError.OutgoingFederationError($"Request to {domain}{requestPath} returned an error", DeserializeObject<Models.ApiError>(error));
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}
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var bodyString = await resp.Content.ReadAsStringAsync();
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return DeserializeObject<T>(bodyString)
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?? throw new ApiError.OutgoingFederationError($"Request to {domain}{requestPath} returned invalid response body");
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}
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private HttpRequestMessage BuildHttpRequest(HttpMethod method, string domain, string requestPath, string? userId = null, object? bodyData = null)
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{
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var body = bodyData != null ? SerializeObject(bodyData) : null;
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var now = _clock.GetCurrentInstant();
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var url = $"https://{domain}{requestPath}";
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var signature = GenerateSignature(new SignatureData(now, domain, requestPath, body?.Length, userId));
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var request = new HttpRequestMessage(method, url);
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request.Headers.Clear();
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request.Headers.Add(USER_AGENT_HEADER, USER_AGENT);
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request.Headers.Add(DATE_HEADER, FormatTime(now));
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request.Headers.Add(SERVER_HEADER, _config.Domain);
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request.Headers.Add(SIGNATURE_HEADER, signature);
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if (userId != null)
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request.Headers.Add(USER_HEADER, userId);
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if (body != null)
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request.Content = new StringContent(body, new MediaTypeHeaderValue("application/json", "utf-8"));
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return request;
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}
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public static string SerializeObject(object data) => JsonConvert.SerializeObject(data, _jsonSerializerSettings);
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public static T? DeserializeObject<T>(string data) => JsonConvert.DeserializeObject<T>(data, _jsonSerializerSettings);
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}
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