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Merge pull request #1 from The-Poolz/init
Init
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‎Poolz.Finance.CSharp.Http.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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‎README.md‎

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# Poolz.Finance.CSharp.LibTemplate
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# Poolz.Finance.CSharp.Http
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Poolz.Finance.CSharp.Http is a lightweight .NET 8 library that centralizes the creation of `HttpClient` instances for Poolz Finance services.
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It wraps the default `HttpClientHandler` with a custom `FailureOnlyLoggingHandler` that surfaces detailed information when requests fail while keeping successful responses silent.
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## Getting started
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```csharp
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using Poolz.Finance.CSharp.Http;
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var factory = new HttpClientFactory();
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var client = factory.Create(
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url: "https://api.poolz.finance",
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configureHeaders: headers =>
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{
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headers.Add("Authorization", "Bearer <token>");
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headers.Add("User-Agent", "Poolz-SDK-Demo/1.0");
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});
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var response = await client.GetAsync("/v1/pools");
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var content = await response.Content.ReadAsStringAsync();
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```
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If the request fails, `FailureOnlyLoggingHandler` rethrows an exception that includes the HTTP method and URL so that you immediately know which call needs attention.
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‎src/Poolz.Finance.CSharp.Http/FailureOnlyLoggingHandler.cs‎

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namespace Poolz.Finance.CSharp.Http;
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public class FailureOnlyLoggingHandler(HttpMessageHandler innerHandler) : DelegatingHandler(innerHandler)
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{
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protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage req, CancellationToken ct)
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{
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try
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{
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var response = await base.SendAsync(req, ct);
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response.EnsureSuccessStatusCode();
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return response;
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}
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catch (HttpRequestException exception)
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{
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throw new HttpRequestException(
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$"HTTP request failed. METHOD: {req.Method}. URL: {req.RequestUri}",
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exception,
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exception.StatusCode
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);
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}
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}
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}

‎src/Poolz.Finance.CSharp.Http/HttpClientFactory.cs‎

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using System.Net.Http.Headers;
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namespace Poolz.Finance.CSharp.Http;
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public class HttpClientFactory : IHttpClientFactory
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{
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public HttpClient Create(string url, Action<HttpRequestHeaders>? configureHeaders = null)
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{
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var client = new HttpClient(new FailureOnlyLoggingHandler(new HttpClientHandler()))
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{
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BaseAddress = new Uri(url)
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};
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configureHeaders?.Invoke(client.DefaultRequestHeaders);
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return client;
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}
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}

‎src/Poolz.Finance.CSharp.Http/IHttpClientFactory.cs‎

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using System.Net.Http.Headers;
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namespace Poolz.Finance.CSharp.Http;
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public interface IHttpClientFactory
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{
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public HttpClient Create(string url, Action<HttpRequestHeaders>? configure = null);
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}

‎src/Poolz.Finance.CSharp.Http/Poolz.Finance.CSharp.Http.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net8.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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</Project>

‎tests/Poolz.Finance.CSharp.Http.Tests/FailureOnlyLoggingHandlerTests.cs‎

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using Xunit;
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using System.Net;
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namespace Poolz.Finance.CSharp.Http.Tests;
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public class FailureOnlyLoggingHandlerTests
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{
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[Fact]
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public async Task SendAsync_ReturnsResponse_WhenStatusIsSuccessful()
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{
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using var handler = new FailureOnlyLoggingHandler(new StubHandler((_, _) =>
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Task.FromResult(new HttpResponseMessage(HttpStatusCode.OK))));
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using var invoker = new HttpMessageInvoker(handler);
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using var request = new HttpRequestMessage(HttpMethod.Get, "https://poolz.finance/success");
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var response = await invoker.SendAsync(request, CancellationToken.None);
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Assert.Equal(HttpStatusCode.OK, response.StatusCode);
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}
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[Fact]
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public async Task SendAsync_ThrowsHttpRequestExceptionWithContext_WhenStatusIsFailure()
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{
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using var handler = new FailureOnlyLoggingHandler(new StubHandler((_, _) =>
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Task.FromResult(new HttpResponseMessage(HttpStatusCode.BadRequest))));
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using var invoker = new HttpMessageInvoker(handler);
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using var request = new HttpRequestMessage(HttpMethod.Post, "https://poolz.finance/failure");
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var exception = await Assert.ThrowsAsync<HttpRequestException>(() => invoker.SendAsync(request, CancellationToken.None));
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Assert.Equal(HttpStatusCode.BadRequest, exception.StatusCode);
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Assert.NotNull(exception.InnerException);
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Assert.Contains("METHOD: POST", exception.Message);
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Assert.Contains("URL: https://poolz.finance/failure", exception.Message);
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}
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private sealed class StubHandler(
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Func<HttpRequestMessage, CancellationToken, Task<HttpResponseMessage>> responseFactory)
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: HttpMessageHandler
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{
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protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
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{
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return responseFactory(request, cancellationToken);
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}
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}
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}

‎tests/Poolz.Finance.CSharp.Http.Tests/HttpClientFactoryTests.cs‎

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using Xunit;
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namespace Poolz.Finance.CSharp.Http.Tests;
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public class HttpClientFactoryTests
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{
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[Fact]
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public void Create_ConfiguresBaseAddressAndHeaders()
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{
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var factory = new HttpClientFactory();
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var expectedBaseAddress = new Uri("https://api.poolz.finance/");
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using var client = factory.Create(expectedBaseAddress.ToString(), headers =>
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{
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headers.Add("X-Test", "42");
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});
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Assert.Equal(expectedBaseAddress, client.BaseAddress);
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Assert.True(client.DefaultRequestHeaders.Contains("X-Test"));
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Assert.Equal("42", client.DefaultRequestHeaders.GetValues("X-Test").Single());
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}
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}

‎tests/Poolz.Finance.CSharp.Http.Tests/Poolz.Finance.CSharp.Http.Tests.csproj‎

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