C# Optimize HttpWebRequest

本文关键字：HttpWebRequest Optimize | 更新日期: 2023-09-27 18:05:58

我正在制作自己的HTTPWebRequest类，我正在尝试优化读取缓冲区并发出请求所需的时间，到目前为止，它需要大约800-1000ms每个请求google.com

相同的代码在c++中需要~ 200ms任何建议我如何优化这更好?

public class OWebReq
{
public string LastError;
public bool LastOK = false;
public OWebReq()
{
}
public static void Init()
{
    ServicePointManager.Expect100Continue = false;
    ServicePointManager.DefaultConnectionLimit = 9999;
    WebRequest.DefaultWebProxy = (WebProxy)null;
    ServicePointManager.ServerCertificateValidationCallback += (sender, certificate, chain, sslPolicyErrors) => true;
}
public string GET(string url, WebProxy proxy = null)
{
    LastOK = false;
    var req = (HttpWebRequest)WebRequest.Create(url);
    req.UserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36";
    req.Proxy = proxy;
    req.KeepAlive = false;
    req.Timeout = 5000;
    req.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
    try
    {
        using(var response=(HttpWebResponse)req.GetResponse())
        {
            var responseStream = response.GetResponseStream();
            if(responseStream!=null)
            {
                using (var sr = new StreamReader(responseStream))
                {
                    return sr.ReadToEnd();
                }
            }
        }
    }
    catch (Exception ex)
    {
        LastError = ex.Message;
        return null;
    }
     return null;
 }
}

执行代码直到var response=(HttpWebResponse)req.GetResponse()占用~ 350ms

C# Optimize HttpWebRequest

尝试设置ServicePointManager.Expect100Continue或req.ServicePoint.Expect100Continue为false。

基本要点是，请求最初只发送报头，并等待服务器响应代码100(继续)。这是350ms的上限。接收到响应后，发送请求的主体。这样，您就不会在网络上放置非常大的请求(具有许多MB的请求体)，当服务器无论如何都会拒绝请求(需要重定向或身份验证，或者报头中有错误等)。

这个链接有非常详细的说明

相关文章：