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using System;
using System.Net;
using System.Threading.Tasks;
using Pathoschild.Http.Client;
namespace StardewModdingAPI.Web.Framework.Clients.GitHub
{
/// <summary>An HTTP client for fetching metadata from GitHub.</summary>
internal class GitHubClient : IGitHubClient
{
/*********
** Properties
*********/
/// <summary>The URL for a GitHub releases API query excluding the base URL, where {0} is the repository owner and name.</summary>
private readonly string ReleaseUrlFormat;
/// <summary>The underlying HTTP client.</summary>
private readonly IClient Client;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="baseUrl">The base URL for the GitHub API.</param>
/// <param name="releaseUrlFormat">The URL for a GitHub releases API query excluding the <paramref name="baseUrl"/>, where {0} is the repository owner and name.</param>
/// <param name="userAgent">The user agent for the API client.</param>
/// <param name="acceptHeader">The Accept header value expected by the GitHub API.</param>
/// <param name="username">The username with which to authenticate to the GitHub API.</param>
/// <param name="password">The password with which to authenticate to the GitHub API.</param>
public GitHubClient(string baseUrl, string releaseUrlFormat, string userAgent, string acceptHeader, string username, string password)
{
this.ReleaseUrlFormat = releaseUrlFormat;
this.Client = new FluentClient(baseUrl)
.SetUserAgent(userAgent)
.AddDefault(req => req.WithHeader("Accept", acceptHeader));
if (!string.IsNullOrWhiteSpace(username))
this.Client = this.Client.SetBasicAuthentication(username, password);
}
/// <summary>Get the latest release for a GitHub repository.</summary>
/// <param name="repo">The repository key (like <c>Pathoschild/SMAPI</c>).</param>
/// <returns>Returns the latest release if found, else <c>null</c>.</returns>
public async Task<GitRelease> GetLatestReleaseAsync(string repo)
{
// validate key format
if (!repo.Contains("/") || repo.IndexOf("/", StringComparison.InvariantCultureIgnoreCase) != repo.LastIndexOf("/", StringComparison.InvariantCultureIgnoreCase))
throw new ArgumentException($"The value '{repo}' isn't a valid GitHub repository key, must be a username and project name like 'Pathoschild/SMAPI'.", nameof(repo));
// fetch info
try
{
return await this.Client
.GetAsync(string.Format(this.ReleaseUrlFormat, repo))
.As<GitRelease>();
}
catch (ApiException ex) when (ex.Status == HttpStatusCode.NotFound)
{
return null;
}
}
/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
this.Client?.Dispose();
}
}
}
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