C# 从 Internet Explorer 获取代理设置 [英] C# Getting proxy settings from Internet Explorer
本文介绍了C# 从 Internet Explorer 获取代理设置的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在德国的某家公司遇到了问题.他们在他们的网络中使用代理，我的程序无法与服务器通信.
i have a problem in certain company in germany. They use proxy in their network and my program cant communicate with server.
IE 使用此设置:
意思是:自动检测设置
这是代码:
public static bool CompleteValidation(string regKey)
{
string uri = "***";
int c = 1;
if (Counter < 5) c = 6 - Counter;
string response = "";
try
{
System.Net.ServicePointManager.Expect100Continue = false;
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
request.AllowWriteStreamBuffering = true;
request.Method = "POST";
request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0";
request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
request.Headers.Add(HttpRequestHeader.AcceptLanguage, "pl,en-us;q=0.7,en;q=0.3");
request.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
request.Headers.Add(HttpRequestHeader.AcceptCharset, "ISO-8859-2,utf-8;q=0.7,*;q=0.7");
request.KeepAlive = true;
//proxy settings
string exepath = Path.GetDirectoryName(Application.ExecutablePath);
string proxySettings = exepath + @"proxy.ini";
WebProxy wp = new WebProxy();
if (File.Exists(proxySettings)) {
request.Proxy = WebRequest.DefaultWebProxy;
IniFile ini = new IniFile(proxySettings);
string user = ini.IniReadValue("Proxy", "User");
string pass = ini.IniReadValue("Proxy", "Password");
string domain = ini.IniReadValue("Proxy", "Domain");
string ip = ini.IniReadValue("Proxy", "IP");
string port_s = ini.IniReadValue("Proxy", "Port");
int port = 0;
if (!string.IsNullOrEmpty(ip))
{
if (!string.IsNullOrEmpty(port_s))
{
try
{
port = Convert.ToInt32(port_s);
}
catch (Exception e)
{
ErrorLog.AddToLog("Problem with conversion of port:");
ErrorLog.AddToLog(e.Message);
ErrorLog.ShowLogWindow();
}
wp = new WebProxy(ip, port);
} else {
wp = new WebProxy(ip);
}
}
if (string.IsNullOrEmpty(domain))
wp.Credentials = new NetworkCredential(user, pass);
else
wp.Credentials = new NetworkCredential(user, pass, domain);
request.Proxy = wp;
}
string post = "***";
request.ContentLength = post.Length;
request.ContentType = "application/x-www-form-urlencoded";
StreamWriter writer = null;
try
{
writer = new StreamWriter(request.GetRequestStream()); // Here is the WebException thrown
writer.Write(post);
writer.Close();
}
catch (Exception e)
{
ErrorLog.AddToLog("Problem with request sending:");
ErrorLog.AddToLog(e.Message);
ErrorLog.ShowLogWindow();
}
HttpWebResponse Response = null;
try
{
Response = (HttpWebResponse)request.GetResponse();
}
catch (Exception e)
{
ErrorLog.AddToLog("Problem with response:");
ErrorLog.AddToLog(e.Message);
ErrorLog.ShowLogWindow();
}
//Request.Proxy = WebProxy.GetDefaultProxy();
//Request.Proxy.Credentials = CredentialCache.DefaultCredentials;
string sResponseHeader = Response.ContentEncoding; // get response header
if (!string.IsNullOrEmpty(sResponseHeader))
{
if (sResponseHeader.ToLower().Contains("gzip"))
{
byte[] b = DecompressGzip(Response.GetResponseStream());
response = System.Text.Encoding.GetEncoding(Response.ContentEncoding).GetString(b);
}
else if (sResponseHeader.ToLower().Contains("deflate"))
{
byte[] b = DecompressDeflate(Response.GetResponseStream());
response = System.Text.Encoding.GetEncoding(Response.ContentEncoding).GetString(b);
}
}
// uncompressed, standard response
else
{
StreamReader ResponseReader = new StreamReader(Response.GetResponseStream());
response = ResponseReader.ReadToEnd();
ResponseReader.Close();
}
}
catch (Exception e)
{
ErrorLog.AddToLog("Problem with comunication:");
ErrorLog.AddToLog(e.Message);
ErrorLog.ShowLogWindow();
}
if (response == "***")
{
SaveKeyFiles();
WriteRegKey(regKey);
RenewCounter();
return true;
}
else
{
return false;
}
}
我的程序将其记录为:
[09:13:18] Searching for hardware ID
[09:13:56] Problem with response:
[09:13:56] The remote server returned an error: (407) Proxy Authentication Required.
[09:15:04] problem with comunication:
[09:15:04] Object reference not set to an object instance.
如果他们写用户并传入proxy.ini文件，程序就可以运行.但问题是他们不能那样做.不知何故 IE 没有它也能工作.有没有办法从 IE 或系统获取这些设置?
If they write user and pass into proxy.ini file, program works. But the problem is they cant do that. And somehow IE works without it. Is there any way to get those settings from IE or system?
推荐答案
使用 GetSystemWebProxy 返回系统默认代理是什么.
Use GetSystemWebProxy to return what the system default proxy is.
WebRequest.DefaultProxy = WebRequest.GetSystemWebProxy();
但是每个 HttpWebRequest 都应该自动填写默认使用此信息.例如，独立控制台应用程序中的以下代码段应该在配置了 PAC 文件的系统上打印正确的信息.
But every HttpWebRequest should automatically be filled out with this information by default. For example, the following snippet in a standalone console application should print the correct information on a system with a PAC file configured.
HttpWebRequest myWebRequest=(HttpWebRequest)WebRequest.Create("http://www.microsoft.com");
// Obtain the 'Proxy' of the Default browser.
IWebProxy proxy = myWebRequest.Proxy;
// Print the Proxy Url to the console.
if (proxy != null)
{
Console.WriteLine("Proxy: {0}", proxy.GetProxy(myWebRequest.RequestUri));
}
else
{
Console.WriteLine("Proxy is null; no proxy will be used");
}
这篇关于C# 从 Internet Explorer 获取代理设置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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