获取System.Net.WebException:远程服务器返回错误:(403)Forbidden.在Google URL Shortener API Call中

Question

我使用下面的代码来缩短长网址

public static string UrlShorten(string url)
{
    string post = "{\"longUrl\": \"" + url + "\"}";
    string shortUrl = url;
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://www.googleapis.com/urlshortener/v1/url?key=" + ReadConfig("GoogleUrlShortnerApiKey"));
    try
    {
        request.ServicePoint.Expect100Continue = false;
        request.Method = "POST";
        request.ContentLength = post.Length;
        request.ContentType = "application/json";
        request.Headers.Add("Cache-Control", "no-cache");

        using (Stream requestStream = request.GetRequestStream())
        {
            byte[] postBuffer = Encoding.ASCII.GetBytes(post);
            requestStream.Write(postBuffer, 0, postBuffer.Length);
        }

        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
            using (Stream responseStream = response.GetResponseStream())
            {
                using (StreamReader responseReader = new StreamReader(responseStream))
                {
                    string json = responseReader.ReadToEnd();
                    shortUrl = Regex.Match(json, @"""id"": ?""(?<id>.+)""").Groups["id"].Value;
                }
            }
        }
    }
    catch (Exception ex)
    {
        // if Google's URL Shortner is down...
        Utility.LogSave("UrlShorten", "Google's URL Shortner is down", url, ex.ToString());
        //System.Diagnostics.Debug.WriteLine(ex.Message);
        //System.Diagnostics.Debug.WriteLine(ex.StackTrace);
    }
    return shortUrl;
}

我创建了一个调度程序来缩短大量的URL.并且大部分时间都低于例外

System.Net.WebException:远程服务器返回错误:(403)Forbidden.在System.Net.HttpWebRequest.GetResponse()

我在想,由于Courtesy Limit我得到了这个例外,所以每用户限制增加了100,000.0请求/秒/用户,但我仍然得到相同的例外.

我不明白为什么它发生,即使我一次几乎没有2000服务器的请求.

请指教.

Answer 1

看看你的问题,我认为这是一个超出速率限制的错误.如果您修改代码,则可以检索错误响应:

try
{
  ........
}
catch (WebException exception)
{
   string responseText;

   using(var reader = new StreamReader(exception.Response.GetResponseStream()))
   {
     responseText = reader.ReadToEnd();
   }
}
catch (Exception ex)
{
  ......
}

如果超出速率限制错误,您将在responseText以下内容中找到类似的内容:

{
 "error": {
  "errors": [
   {
    "domain": "usageLimits",
    "reason": "rateLimitExceeded",
    "message": "Rate Limit Exceeded"
   }
  ],
  "code": 403,
  "message": "Rate Limit Exceeded"
 }
}