C# GraphSdk 的代理配置

Question

我需要通过代理中继 C# Graph-Sdk 发出的 HTTP 请求。

在文档中我找不到任何关于代理设置的信息。我目前找到的唯一解决方法是更改全局代理设置：

System.Net.GlobalProxySelection.Select = proxy;
or
System.Net.WebRequest.DefaultWebProxy = proxy;

遗憾的是，在我的情况下，如果不移动所有图表，这是不可能的相关功能到一个单独的进程中（因为主进程的其余部分需要运行没有代理）。

所以我的问题是：

sdk有官方支持代理设置吗？
未来的 sdk 版本是否计划支持代理设置？

Answer 1

您可以在实例化 GraphServiceClient 时设置代理。

2021 年 6 月 9 日更新

现在有一个更好的方法，就是使用 GraphClientFactory。

HttpClient httpClient = GraphClientFactory.Create(GetClientCredentialProvider(), "v1.0", "Global", new WebProxy(""));
var graphServiceClient = new(httpClient);

旧答案

System.Net.Http.HttpClientHandler httpClientHandler = new System.Net.Http.HttpClientHandler()
{
    AllowAutoRedirect = false,
    Proxy = new WebProxy() // TODO: Set your proxy settings. 
};

HttpProvider httpProvider = new HttpProvider(httpClientHandler, true);

GraphServiceClient client = new GraphServiceClient("https://graph.microsoft.com/v1.0",
        new DelegateAuthenticationProvider(
            async (requestMessage) =>
            {
                var token = await goGetSomeTokenNow();
                requestMessage.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("bearer", token);

            }), httpProvider);

Answer 2

this 文章中有 Microsoft.Graph 4+ 的新方法。然而，由于我们的 azure adfs 只有 auth 请求来自浏览器，因此我必须混合使用两种方式来实现这一点。希望这对其他人有帮助。

private GraphServiceClient GetGraphClient()
{
    string[] scopes = new string[] { "User.Read", "User.ReadBasic.All", "Mail.Read", "Mail.ReadWrite", "Mail.Send" };

    var msalFactory = new MsalHttpClientFactoryOwn(_configuration);

    IPublicClientApplication publicClientApplication = PublicClientApplicationBuilder
    .Create("")
    .WithTenantId("")
    .WithHttpClientFactory(msalFactory)
    .Build();

    UsernamePasswordProvider authProvider = new UsernamePasswordProvider(publicClientApplication, scopes);

    HttpClient httpClient = GraphClientFactory.Create(authProvider, "v1.0", "Global", msalFactory.GetWebProxy());
    var graphClient = new GraphServiceClient(httpClient);
    
    return graphClient;
}

public class MsalHttpClientFactoryOwn : IMsalHttpClientFactory
{
    private readonly IConfiguration configuration;

    public ProxiedHttpClientFactory(IConfiguration configuration)
    {
        this.configuration = configuration;
    }

    public HttpClient GetHttpClient()
    {
        var proxyHttpClientHandler = new HttpClientHandler() 
        { 
            UseProxy = true,
            UseDefaultCredentials = false,
            Credentials = GetNetworkCredentials(),
            Proxy = GetWebProxy()
        };

        var httpClient = new HttpClient(proxyHttpClientHandler);
        httpClient.DefaultRequestHeaders.Add("user-agent", "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko");
        httpClient.Timeout = TimeSpan.FromMinutes(30);

        return httpClient;
    }

    public WebProxy GetWebProxy()
    {
        var proxy = new WebProxy
        {
            Address = new Uri("proxy address"),
            BypassProxyOnLocal = false,
            UseDefaultCredentials = false,
            Credentials = GetNetworkCredentials()
        };

        return proxy;
    }

    private NetworkCredential GetNetworkCredentials()
    {
        var networkCreds =  new NetworkCredential(u, p);
        return networkCreds;
    }
}

C# GraphSdk 的代理配置

Proxy Configuration for C# GraphSdk

c#

http-proxy

microsoft-graph-api