In C # application, when calling API interface, it often takes 15+ seconds to access. API is deployed in another network segment of intranet and needs to be accessed by proxy. Some one said that it was a DNS problem, try to setting the host, which has no effect. Environment: Windows Server 2012 R2, IIS v8.5 Code Script:
private string PostHttp(string url, string authHeader, string requestBody)
{
var webRequest = System.Net.WebRequest.Create(url);
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
byte[] data = System.Text.Encoding.UTF8.GetBytes(requestBody);
webRequest.Method = "POST";
webRequest.Headers.Add("Accept-Language", "zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
webRequest.Headers.Add("Accept-Encoding", "gzip, deflate");
webRequest.Headers.Add("Authorization", authHeader);
webRequest.ContentLength = data.Length;
webRequest.ContentType = "application/x-www-form-urlencoded";
System.Net.WebProxy proxy = new System.Net.WebProxy("http://myHttpProxyAddress", false);
proxy.Credentials = new System.Net.NetworkCredential("HttpProxyUser", "HttpProxyPassword");
webRequest.Proxy = proxy;
var writer = webRequest.GetRequestStream();
writer.Write(data, 0, data.Length);
writer.Close();
using (WebResponse webResponse = webRequest.GetResponse())
{
System.IO.StreamReader reader = null;
if (webResponse.Headers["Content-Encoding"] == "gzip")
reader = new System.IO.StreamReader(new GZipStream(webResponse.GetResponseStream(), CompressionMode.Decompress), System.Text.Encoding.UTF8);
else
reader = new System.IO.StreamReader(webResponse.GetResponseStream(), System.Text.Encoding.UTF8);
var result = reader.ReadToEnd();
reader.Close();
return result;
}
}
