在 .NET 4.5 HttpClient 中使用代理 [英] Using a proxy with .NET 4.5 HttpClient

问题描述

我正在解决我通过 .NET 的 HttpClient 调用的服务的错误，尝试通过本地代理 (Fiddler) 路由请求，但我的代理设置似乎没有生效.

I'm troubleshooting a bug with a service I call through .NET's HttpClient, trying to route the request through a local proxy (Fiddler), but my proxy settings seem to not be taking effect.

以下是我创建客户端的方法:

Here's how I create the client:

private HttpClient CreateHttpClient(CommandContext ctx, string sid) {
    var cookies = new CookieContainer();

    var handler = new HttpClientHandler {
        CookieContainer = cookies,
        UseCookies = true,
        UseDefaultCredentials = false,
        Proxy = new WebProxy("http://localhost:8888", false, new string[]{}),
        UseProxy = true,
    };

    // snip out some irrelevant setting of authentication cookies

    var client = new HttpClient(handler) {
        BaseAddress = _prefServerBaseUrl,
    };

    client.DefaultRequestHeaders.Accept.Add(
        new MediaTypeWithQualityHeaderValue("application/json"));

    return client;
}

然后我通过以下方式发送请求:

then I send the request by:

var response = CreateHttpClient(ctx, sid).PostAsJsonAsync("api/prefs/", smp).Result;

请求直接发送到服务器，而不会尝试访问代理.我错过了什么?

Request goes straight to the server without attempting to hit the proxy. What did I miss?

推荐答案

啊，我指向的 BaseAddress 是 http://localhost:8081.事实证明，尽管将 BypassOnLocal 设置为 false，但显然 localhost 仍然足够特殊，可以绕过代理.

Ah, The BaseAddress I was pointing to was http://localhost:8081. Turns out that despite setting BypassOnLocal to false, evidently localhost is still special enough that it bypasses the proxy.

我在 IIS 中添加了一个域绑定，主机文件条目将该域指向 127.0.0.1，使用新创建的域，现在它可以工作了.

I added a domain binding in IIS, host file entry to point that domain to 127.0.0.1, used newly created domain, now it works.

这篇关于在 .NET 4.5 HttpClient 中使用代理的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！