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#define SINGLE_HTTPCLIENT // Use a single HttpClient instance for all MatrixHttpClient instances
// #define SYNC_HTTPCLIENT // Only allow one request as a time, for debugging
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Net.Http.Headers;
using System.Reflection;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using ArcaneLibs;
using ArcaneLibs.Extensions;
namespace LibMatrix.Extensions;
#if SINGLE_HTTPCLIENT
// TODO: Add URI wrapper for
public class MatrixHttpClient {
private static readonly HttpClient Client;
static MatrixHttpClient() {
try {
var handler = new SocketsHttpHandler {
PooledConnectionLifetime = TimeSpan.FromMinutes(15),
MaxConnectionsPerServer = 4096,
EnableMultipleHttp2Connections = true
};
Client = new HttpClient(handler) {
DefaultRequestVersion = new Version(3, 0)
};
}
catch (PlatformNotSupportedException e) {
Console.WriteLine("Failed to create HttpClient with connection pooling, continuing without connection pool!");
Console.WriteLine("Original exception (safe to ignore!):");
Console.WriteLine(e);
Client = new HttpClient {
DefaultRequestVersion = new Version(3, 0)
};
}
catch (Exception e) {
Console.WriteLine("Failed to create HttpClient:");
Console.WriteLine(e);
throw;
}
}
#if SYNC_HTTPCLIENT
internal SemaphoreSlim _rateLimitSemaphore { get; } = new(1, 1);
#endif
public Dictionary<string, string> AdditionalQueryParameters { get; set; } = new();
public Uri? BaseAddress { get; set; }
// default headers, not bound to client
public HttpRequestHeaders DefaultRequestHeaders { get; set; } =
typeof(HttpRequestHeaders).GetConstructor(BindingFlags.NonPublic | BindingFlags.Instance, null, [], null)?.Invoke([]) as HttpRequestHeaders ??
throw new InvalidOperationException("Failed to create HttpRequestHeaders");
private JsonSerializerOptions GetJsonSerializerOptions(JsonSerializerOptions? options = null) {
options ??= new JsonSerializerOptions();
options.Converters.Add(new JsonFloatStringConverter());
options.Converters.Add(new JsonDoubleStringConverter());
options.Converters.Add(new JsonDecimalStringConverter());
options.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
return options;
}
public async Task<HttpResponseMessage> SendUnhandledAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
#if SYNC_HTTPCLIENT
await _rateLimitSemaphore.WaitAsync(cancellationToken);
#endif
Console.WriteLine($"Sending {request.Method} {BaseAddress}{request.RequestUri} ({Util.BytesToString(request.Content?.Headers.ContentLength ?? 0)})");
if (request.RequestUri is null) throw new NullReferenceException("RequestUri is null");
if (!request.RequestUri.IsAbsoluteUri) request.RequestUri = new Uri(BaseAddress, request.RequestUri);
foreach (var (key, value) in AdditionalQueryParameters) request.RequestUri = request.RequestUri.AddQuery(key, value);
foreach (var (key, value) in DefaultRequestHeaders) request.Headers.Add(key, value);
request.Options.Set(new HttpRequestOptionsKey<bool>("WebAssemblyEnableStreamingResponse"), true);
HttpResponseMessage? responseMessage;
try {
responseMessage = await Client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
}
catch (Exception e) {
Console.WriteLine(
$"Failed to send request {request.Method} {BaseAddress}{request.RequestUri} ({Util.BytesToString(request.Content?.Headers.ContentLength ?? 0)}):\n{e}");
throw;
}
#if SYNC_HTTPCLIENT
finally {
_rateLimitSemaphore.Release();
}
#endif
Console.WriteLine(
$"Sending {request.Method} {request.RequestUri} ({Util.BytesToString(request.Content?.Headers.ContentLength ?? 0)}) -> {(int)responseMessage.StatusCode} {responseMessage.StatusCode} ({Util.BytesToString(responseMessage.Content.Headers.ContentLength ?? 0)})");
return responseMessage;
}
public async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken = default) {
var responseMessage = await SendUnhandledAsync(request, cancellationToken);
if (responseMessage.IsSuccessStatusCode) return responseMessage;
//error handling
var content = await responseMessage.Content.ReadAsStringAsync(cancellationToken);
if (content.Length == 0)
throw new MatrixException() {
ErrorCode = "M_UNKNOWN",
Error = "Unknown error, server returned no content"
};
if (!content.StartsWith('{')) throw new InvalidDataException("Encountered invalid data:\n" + content);
//we have a matrix error
MatrixException? ex = null;
try {
ex = JsonSerializer.Deserialize<MatrixException>(content);
}
catch (JsonException e) {
throw new LibMatrixException() {
ErrorCode = "M_INVALID_JSON",
Error = e.Message + "\nBody:\n" + await responseMessage.Content.ReadAsStringAsync(cancellationToken)
};
}
Debug.Assert(ex != null, nameof(ex) + " != null");
ex.RawContent = content;
// Console.WriteLine($"Failed to send request: {ex}");
if (ex?.RetryAfterMs is null) throw ex!;
//we have a ratelimit error
await Task.Delay(ex.RetryAfterMs.Value, cancellationToken);
request.ResetSendStatus();
return await SendAsync(request, cancellationToken);
}
// GetAsync
public Task<HttpResponseMessage> GetAsync([StringSyntax("Uri")] string? requestUri, CancellationToken? cancellationToken = null) =>
SendAsync(new HttpRequestMessage(HttpMethod.Get, requestUri), cancellationToken ?? CancellationToken.None);
// GetFromJsonAsync
public async Task<T?> TryGetFromJsonAsync<T>(string requestUri, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default) {
try {
return await GetFromJsonAsync<T>(requestUri, options, cancellationToken);
}
catch (JsonException e) {
Console.WriteLine($"Failed to deserialize response from {requestUri}: {e.Message}");
return default;
}
catch (HttpRequestException e) {
Console.WriteLine($"Failed to get {requestUri}: {e.Message}");
return default;
}
}
public async Task<T> GetFromJsonAsync<T>(string requestUri, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default) {
options = GetJsonSerializerOptions(options);
var request = new HttpRequestMessage(HttpMethod.Get, requestUri);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var response = await SendAsync(request, cancellationToken);
response.EnsureSuccessStatusCode();
await using var responseStream = await response.Content.ReadAsStreamAsync(cancellationToken);
return await JsonSerializer.DeserializeAsync<T>(responseStream, options, cancellationToken) ??
throw new InvalidOperationException("Failed to deserialize response");
}
// GetStreamAsync
public new async Task<Stream> GetStreamAsync(string requestUri, CancellationToken cancellationToken = default) {
var request = new HttpRequestMessage(HttpMethod.Get, requestUri);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var response = await SendAsync(request, cancellationToken);
response.EnsureSuccessStatusCode();
return await response.Content.ReadAsStreamAsync(cancellationToken);
}
public async Task<HttpResponseMessage> PutAsJsonAsync<T>([StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, T value, JsonSerializerOptions? options = null,
CancellationToken cancellationToken = default) where T : notnull {
options = GetJsonSerializerOptions(options);
var request = new HttpRequestMessage(HttpMethod.Put, requestUri);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
request.Content = new StringContent(JsonSerializer.Serialize(value, value.GetType(), options),
Encoding.UTF8, "application/json");
return await SendAsync(request, cancellationToken);
}
public async Task<HttpResponseMessage> PostAsJsonAsync<T>([StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, T value, JsonSerializerOptions? options = null,
CancellationToken cancellationToken = default) where T : notnull {
options ??= new JsonSerializerOptions();
options.Converters.Add(new JsonFloatStringConverter());
options.Converters.Add(new JsonDoubleStringConverter());
options.Converters.Add(new JsonDecimalStringConverter());
options.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
var request = new HttpRequestMessage(HttpMethod.Post, requestUri);
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
request.Content = new StringContent(JsonSerializer.Serialize(value, value.GetType(), options),
Encoding.UTF8, "application/json");
return await SendAsync(request, cancellationToken);
}
public async IAsyncEnumerable<T?> GetAsyncEnumerableFromJsonAsync<T>([StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, JsonSerializerOptions? options = null) {
options = GetJsonSerializerOptions(options);
var res = await GetAsync(requestUri);
var result = JsonSerializer.DeserializeAsyncEnumerable<T>(await res.Content.ReadAsStreamAsync(), options);
await foreach (var resp in result) yield return resp;
}
public async Task<bool> CheckSuccessStatus(string url) {
//cors causes failure, try to catch
try {
var resp = await Client.GetAsync(url);
return resp.IsSuccessStatusCode;
}
catch (Exception e) {
Console.WriteLine($"Failed to check success status: {e.Message}");
return false;
}
}
public async Task<HttpResponseMessage> PostAsync(string uri, HttpContent? content, CancellationToken cancellationToken = default) {
var request = new HttpRequestMessage(HttpMethod.Post, uri) {
Content = content
};
return await SendAsync(request, cancellationToken);
}
}
#endif
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