天气API http://www.weather.gov/

Question

我通过访问他们的XML文件从国家气象服务获取天气信息.但截至今天,我一直收到拒绝访问错误(403)我的服务器是否已阻止？如果是这样我可以使用哪些方法在美国免费获取天气信息？

我无法相信我的网络服务仅仅受到了几次点击.以防这是我用来测试天气数据的计划工作:

 public override async Task ExecuteAsync()
    {
        GoogleGeocoder geocoder;
        //Geocode variables
        string apiKey = WebConfigurationManager.AppSettings["googleApiKey"];

        if (String.IsNullOrEmpty(apiKey))
        {
            geocoder = new GoogleGeocoder();
        }
        else
        {
            geocoder = new GoogleGeocoder(apiKey);
        }



        string longitude = string.Empty;

        string latitude = string.Empty;

        var xdoc = new XDocument();

        var project = Project();

        //Query for each project and get their longitude and latitude

        DataTable dataTable = SqlHelper.ExecuteDataset("getAll", "1").Tables[0];

        if (dataTable.Rows.Count > 0) {
            foreach (DataRow dataRow in dataTable.Rows) {
                Map.DataToObject(dataRow, project);

                //Find Longitude and latitude based on zipcode or address.
                IEnumerable<Address> addresses = geocoder.Geocode(project.SiteCity + "," + project.SiteState + " " + project.SitePostalCode);


                longitude = addresses.First().Coordinates.Latitude.ToString();
                latitude = addresses.First().Coordinates.Longitude.ToString();

                HttpClient client = new HttpClient();
                client.BaseAddress = new Uri("http://forecast.weather.gov/MapClick.php");
                string uri = "http://forecast.weather.gov/MapClick.php?lat=" + latitude + "&lon=" + longitude + "&FcstType=dwml";

                HttpResponseMessage response = await client.GetAsync(uri);

                xdoc = XDocument.Parse(await response.Content.ReadAsStringAsync(), LoadOptions.None);


                Services.Log.Info(xdoc.Descendants("wordedForecast").Descendants("text").ElementAt(0).Value);


                //Update or create an weather entry for each project

            }
        }







        return;//Task.FromResult(true);
    }
}

Answer 1

看来你的网站改变了政策.它需要User-Agent设置标题.您所需要的只是将其设置为某个值.

var url = "http://forecast.weather.gov/MapClick.php?lat=42&lon=-75&FcstType=dwml";
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent", "Stackoverflow/1.0");
var xml = await client.GetStringAsync(url);