c# - .NET 核心 HttpClient - "A security error occurred"HttpRequestException

Question

我正在尝试使用 .NET Core 和 C# 向我的 Vizio TV 发出 HTTPS 请求，该 API 有一些文档记录 here .

在 Chrome 中访问 HTTP 服务器时，我收到“NET::ERR_CERT_AUTHORITY_INVALID”错误。当我在 C# 中使用 HttpClient 发出请求时，将抛出 HttpRequestException。我试过将证书添加到 Windows，但我对 TLS 还不够熟悉。

我也不担心我的通信被窥探，所以我想忽略任何 HTTPS 错误。

这是我正在使用的相关代码。

public async Task Pair(string deviceName) {
    using (var httpClient = new HttpClient())
    try {
        httpClient.BaseAddress = new Uri($"https://{televisionIPAddress}:9000/");

        // Assume all certificates are valid?
        ServicePointManager.ServerCertificateValidationCallback =
            (sender, certificate, chain, sslPolicyErrors) => true;

        deviceID = Guid.NewGuid().ToString();

        var startPairingRequest = new HttpRequestMessage(HttpMethod.Put, "/pairing/start");
        startPairingRequest.Content = CreateStringContent(new PairingStartRequestBody {
            DeviceID = deviceID,
            DeviceName = deviceName
        });

        var startPairingResponse = await httpClient.SendAsync(startPairingRequest); // HttpRequestException thrown here
        Console.WriteLine(startPairingResponse);
    } catch (HttpRequestException e) {
        Console.WriteLine(e.InnerException.Message); // prints "A security error occurred"
    }
}

StringContent CreateStringContent(object obj) {
    return new StringContent(JsonConvert.SerializeObject(obj), Encoding.UTF8, "application/json");
}

Answer 1

通过设置 HttpClientHandler 并将 ServerCertificateCustomValidationCallback 设置为返回 true 解决了这个问题。

using (var handler = new HttpClientHandler {
    ServerCertificateCustomValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true
})
using (var httpClient = new HttpClient(handler))