Question

我正在尝试阅读从nyc.gov获得的回复。我用Fiddler构造了WebRequest，它一直在超时。重要：如果url为https://www.google.com，则此方法有效，因此必须来自nyc.gov服务器。但是如何知道我的代码和Chrome之间的区别？

我尝试将KeepAlive设置为true / false / none。
我尝试使用Http1.0
我尝试将request.ServicePoint.Expect100Continue设置为false
我尝试设置request.ContentLength = 0;
我尝试将其包含在“使用”中
我添加到了app.config

<system.net>
    <connectionManagement>
      <add address="*" maxconnection="1000" />
    </connectionManagement>
  </system.net>

这是我的代码：

 try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://a810-bisweb.nyc.gov/bisweb/bispi00.jsp");

                request.KeepAlive = true;
                request.Headers.Add("Upgrade-Insecure-Requests", @"1");
                request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36";
                request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3";
                request.Headers.Set(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
                request.Headers.Set(HttpRequestHeader.AcceptLanguage, "en-US,en;q=0.9");

                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException e)
            {
                if (e.Status == WebExceptionStatus.ProtocolError) response = (HttpWebResponse)e.Response;
                else return false;
            }
            catch (Exception)
            {
                if (response != null) response.Close();
                return false;
            }

这是Chrome的RAW请求（由Fiddler提供）-工作：

GET http://a810-bisweb.nyc.gov/bisweb/bispi00.jsp HTTP/1.1
Host: a810-bisweb.nyc.gov
Connection: keep-alive
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9

这是我代码中的RAW请求-HANGS（并最终超时）

 GET http://a810-bisweb.nyc.gov/bisweb/bispi00.jsp HTTP/1.1
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Host: a810-bisweb.nyc.gov
Connection: Keep-Alive

c＃GetResponse（）超时，但可在浏览器上使用

0 个答案: