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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;
public static class HttpClientExtensions {
public static async Task<bool> CheckSuccessStatus(this HttpClient hc, string url) {
//cors causes failure, try to catch
try {
var resp = await hc.GetAsync(url);
return resp.IsSuccessStatusCode;
}
catch (Exception e) {
Console.WriteLine($"Failed to check success status: {e.Message}");
return false;
}
}
}
#region Per-instance HTTP client code
#if !SINGLE_HTTPCLIENT
public class MatrixHttpClient() : HttpClient(handler) {
private static readonly SocketsHttpHandler handler = new() {
PooledConnectionLifetime = TimeSpan.FromMinutes(15),
MaxConnectionsPerServer = 256,
EnableMultipleHttp2Connections = true
};
public Dictionary<string, string> AdditionalQueryParameters { get; set; } = new();
internal string? AssertedUserId { get; set; }
internal SemaphoreSlim _rateLimitSemaphore { get; } = new(1, 1);
internal const bool debug = false;
private JsonSerializerOptions GetJsonSerializerOptions(JsonSerializerOptions? options = null) {
options ??= new JsonSerializerOptions();
options.Converters.Add(new JsonFloatStringConverter());
options.Converters.Add(new JsonDoubleStringConverter());
options.Converters.Add(new JsonDecimalStringConverter());
options.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
return options;
}
public async Task<HttpResponseMessage> SendUnhandledAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
if(debug) await _rateLimitSemaphore.WaitAsync(cancellationToken);
Console.WriteLine($"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);
// if (AssertedUserId is not null) request.RequestUri = request.RequestUri.AddQuery("user_id", AssertedUserId);
foreach (var (key, value) in AdditionalQueryParameters) request.RequestUri = request.RequestUri.AddQuery(key, value);
// Console.WriteLine($"Sending request to {request.RequestUri}");
try {
var webAssemblyEnableStreamingResponseKey =
new HttpRequestOptionsKey<bool>("WebAssemblyEnableStreamingResponse");
request.Options.Set(webAssemblyEnableStreamingResponseKey, true);
}
catch (Exception e) {
Console.WriteLine("Failed to set browser response streaming:");
Console.WriteLine(e);
}
HttpResponseMessage? responseMessage;
try {
responseMessage = await base.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
}
catch (Exception e) {
Console.WriteLine($"Failed to send request {request.Method} {BaseAddress}{request.RequestUri} ({Util.BytesToString(request.Content?.Headers.ContentLength ?? 0)}):\n{e}");
throw;
}
finally {
if(debug) _rateLimitSemaphore.Release();
}
Console.WriteLine($"Sending {request.Method} {request.RequestUri} ({Util.BytesToString(request.Content?.Headers.ContentLength ?? 0)}) -> {(int)responseMessage.StatusCode} {responseMessage.StatusCode} ({Util.BytesToString(responseMessage.Content.Headers.ContentLength ?? 0)})");
return responseMessage;
}
public async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
var responseMessage = await SendUnhandledAsync(request, cancellationToken);
if (responseMessage.IsSuccessStatusCode) return responseMessage;
//error handling
var content = await responseMessage.Content.ReadAsStringAsync(cancellationToken);
if (content.Length == 0)
throw new MatrixException() {
ErrorCode = "M_UNKNOWN",
Error = "Unknown error, server returned no content"
};
if (!content.StartsWith('{')) throw new InvalidDataException("Encountered invalid data:\n" + content);
//we have a matrix error
MatrixException? ex = null;
try {
ex = JsonSerializer.Deserialize<MatrixException>(content);
}
catch (JsonException e) {
throw new LibMatrixException() {
ErrorCode = "M_INVALID_JSON",
Error = e.Message + "\nBody:\n" + await responseMessage.Content.ReadAsStringAsync(cancellationToken)
};
}
Debug.Assert(ex != null, nameof(ex) + " != null");
ex.RawContent = content;
// Console.WriteLine($"Failed to send request: {ex}");
if (ex?.RetryAfterMs is null) throw ex!;
//we have a ratelimit error
await Task.Delay(ex.RetryAfterMs.Value, cancellationToken);
typeof(HttpRequestMessage).GetField("_sendStatus", BindingFlags.NonPublic | BindingFlags.Instance)
?.SetValue(request, 0);
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 (HttpRequestException e) {
Console.WriteLine($"Failed to get {requestUri}: {e.Message}");
return default;
}
}
public async Task<T> GetFromJsonAsync<T>(string requestUri, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default) {
options = GetJsonSerializerOptions(options);
// Console.WriteLine($"GetFromJsonAsync called for {requestUri} with json options {options?.ToJson(ignoreNull:true)} and cancellation token {cancellationToken}");
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);
#if DEBUG && false // This is only used for testing, so it's disabled by default
try {
await PostAsync("http://localhost:5116/validate/" + typeof(T).AssemblyQualifiedName, new StreamContent(responseStream), cancellationToken);
}
catch (Exception e) {
Console.WriteLine("[!!] Checking sync response failed: " + e);
}
#endif
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"));
// Console.WriteLine($"Sending PUT {requestUri}");
// Console.WriteLine($"Content: {JsonSerializer.Serialize(value, value.GetType(), options)}");
// Console.WriteLine($"Type: {value.GetType().FullName}");
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;
}
}
#endif
#endregion
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