通过 .NET/C# 查询 Comcast/Xfinity 每月数据配额

Question

以下代码报告“错误：未经身份验证”。

如何使用 .NET 对此 Comcast/Xfinity API 进行身份验证，以查询/获取具有每月配额的帐户的已用和可用数据？

static async Task Main() {
    using (var httpClient = new HttpClient()) {
        using (var request = new HttpRequestMessage(new HttpMethod("GET"), "https://customer.xfinity.com/apis/services/internet/usage")) {
            var response = await httpClient.SendAsync(request);
            var responseStream = await response.Content.ReadAsStreamAsync();
            var streamReader = new StreamReader(responseStream, Encoding.UTF8);
            var responseContent = streamReader.ReadToEnd(); // {"error":"unauthenticated"}
        }
    }
}

Answer 1

想通了。此代码在 .NET Framework（测试 4.7.1）或 .NET Core（测试 2.2）中运行。它使用另外定义的Username 和Password 值进行身份验证，并打印使用的数据和当月剩余的数据。

static async Task Main() {
    using (var httpClient = new HttpClient()) {
        double totalUsage;
        double allowableUsage;
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12; // this line can be removed in .NET Core
        using (var request = new HttpRequestMessage(new HttpMethod("POST"), "https://login.xfinity.com/login")) {
            var data = new Dictionary<string, string> {
                {"user", Username}
                , {"passwd", Password}
                , {"s", "oauth"}
                , {"continue", "https://oauth.xfinity.com/oauth/authorize?client_id=my-account-web&prompt=login&redirect_uri=https%3A%2F%2Fcustomer.xfinity.com%2Foauth%2Fcallback&response_type=code"}
            };
            var content = string.Join("&", data.Select(x => $"{x.Key}={WebUtility.UrlEncode(x.Value)}"));
            request.Content = new StringContent(content, Encoding.UTF8, "application/x-www-form-urlencoded");
            await httpClient.SendAsync(request);
        }
        using (var request = new HttpRequestMessage(new HttpMethod("GET"), "https://customer.xfinity.com/apis/services/internet/usage")) {
            var response = await httpClient.SendAsync(request);
            var responseStream = await response.Content.ReadAsStreamAsync();
            var streamReader = new StreamReader(responseStream);
            var responseContent = streamReader.ReadToEnd();
            var parsedResponse = JObject.Parse(responseContent);
            var usageMonths = parsedResponse["usageMonths"];
            var currentMonthUsage = usageMonths.Last;
            totalUsage = currentMonthUsage.Value<double?>("totalUsage") ?? 0;
            allowableUsage = currentMonthUsage.Value<double?>("allowableUsage") ?? 0;
        }
        Console.WriteLine($"Allowable: {allowableUsage}");
        Console.WriteLine($"Total    : {totalUsage}");
        Console.ReadKey();
    }
}

取决于nuget.org/packages/Newtonsoft.Json/12.0.1