WebClient.DownloadString(),Unable to connect Remote Server

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Hi ,
I want to translate from English to Malay using Google API.
I have the following code:

C#

public static string TranslateText(string input, string languagePair, Encoding encoding)
    {
      string url = String.Format("http://www.google.com/translate_t?hl=en&ie=UTF8&text={0}&langpair={1}", input, languagePair);
      string result = String.Empty;
      using (WebClient webClient = new WebClient())
      {
        webClient.Encoding = encoding;
        NetworkCredential netcredit = new NetworkCredential("MyNetworkUserID", "MyNetworkPassword", "corp");
        webClient.Credentials = netcredit;
        webClient.Proxy = new System.Net.WebProxy()
        {
            Credentials = new System.Net.NetworkCredential("MyNetworkUserID", "MyNetworkPassword", "corp")
        };
       // webClient.Proxy = null;//if I don't give webClient.Proxy-it returns Error "407-ProxyAuthentication Required!"
        result = webClient.DownloadString(url);
          // result = webClient.DownloadString("http://www.google.com/");//just to check with google itself,still the same error
      }
      Match m = Regex.Match(result, "(?<=<div id=result_box dir=\"ltr\">)(.*?)(?=</div>)");
      if (m.Success)
        result = m.Value;
else
result="Failure";
      return result;
    }

After running this:Getting the following error:Unable to connect Remote Server,the detail error msg is as below:
"No connection could be made because the target machine actively refused it 209.85.231.104:80"
Where did I go wrong?Please help me.

Posted 28-Nov-10 23:01pm

avishekrc

Updated 29-Nov-10 2:01am

Sandeep Mewara

v2

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Manfred Rudolf Bihy · Answer 1 · 2010-11-29T03:18:00

Solution 1

What happens if you don't set credentials on the webclient. It's very likely that you need the credentials for the proxy, but not for google translate. Another thing that caught my attention is that you didn't explicitely specify the proxy servers address.

Modification

Use this to create the web proxy:

WebProxy proxyObject = new WebProxy("http://nameOfYourProxyServer:80/");
proxyObject.Credentials =  new System.Net.NetworkCredential("MyNetworkUserID", "MyNetworkPassword", "corp");

You'll have to substitute the name of your proxy server in the construtor of WebProxy and I'm assuming here that port 80 is the proxy port. You'll have to ask your network administrator what name and port to use.

Cheers

Manfred

Posted 29-Nov-10 3:18am

Manfred Rudolf Bihy

Updated 29-Nov-10 19:39pm

v3

Comments

avishekrc 30-Nov-10 1:21am

1.What happens if you don't set credentials on the webclient?It is thowing the same error.
2.How to specify the proxy servers address here?Give me some Idea.

avishekrc 30-Nov-10 2:39am

Hi,
I am getting the error:407:Proxy Authentication Required!
This is how my new function look like:
public static string TranslateText(string input, string languagePair, Encoding encoding)
{
string url = String.Format("http://www.google.com/translate_t?hl=en&ie=UTF8&text={0}&langpair={1}", input, languagePair);
string result = String.Empty;
WebClient webClient = new WebClient();
webClient.Encoding = encoding;
NetworkCredential netcredit = new NetworkCredential("archowdhury", "Secure*45", "corp");
webClient.Credentials = netcredit;
WebProxy proxyObject = new WebProxy("http://proxy1:3128/");
proxyObject.Credentials = new System.Net.NetworkCredential("archowdhury", "Secure*45", "corp");
webClient.Proxy = proxyObject;//if I don't give webClient.Proxy-it returns Error 407-ProxyAuthentication Required!
result = webClient.DownloadString(url);
//result = webClient.DownloadString("http://www.google.com");//just to check with google itself,still the same error

Match m = Regex.Match(result, "(?<=<div id=result_box dir=\"ltr\">)(.*?)(?=</div>)");

if (m.Success)
result = m.Value;

return result;
}

Manfred Rudolf Bihy 30-Nov-10 2:53am

Sounds like an issue I had once. The account information used by the proxy was NOT the same as my windows logon account but some LDAP account. You may have to ask your network administrator what account information you need to authenticate yourself to the proxy.

avishekrc 30-Nov-10 2:54am

Hi Manfred,
Please find below my comments as another answer.

avishekrc 30-Nov-10 2:57am

Sorry,I did not check your comment,after discussing with Netwrok Guy,will let you know.Please ignore my answer below.

Dalek Dave 30-Nov-10 3:52am

Good Call.

avishekrc · Answer 2 · 2010-11-29T20:53:00

Hi Manfred,
Thanks for your time and help.But unfortunately it is giving the following error:"The Remote server returned an error:407:Proxy Authentication Required!"
I am running it in IE7,and I checked in the following path:Tools->internet Options->Connections->LAN Settings,and there I found that "use a proxy server for your LAN" is checked and ADdress being proxy1 and port no being 3128.
Am I missing something?
This is how my new function looks like as suggested by you:

public static string TranslateText(string input, string languagePair, Encoding encoding)
    {
      string url = String.Format("http://www.google.com/translate_t?hl=en&amp;ie=UTF8&amp;text={0}&amp;langpair={1}", input, languagePair);
      string result = String.Empty;
      WebClient webClient = new WebClient();     
          webClient.Encoding = encoding;
          NetworkCredential netcredit = new NetworkCredential("archowdhury", "Secure*45", "corp");
          webClient.Credentials = netcredit;
          WebProxy proxyObject = new WebProxy("http://proxy1:3128/");
          proxyObject.Credentials = new System.Net.NetworkCredential("archowdhury", "Secure*45", "corp");
          webClient.Proxy = proxyObject;
          result = webClient.DownloadString(url);
          

      Match m = Regex.Match(result, "(?&lt;=&lt;div id=result_box dir=\"ltr\"&gt;)(.*?)(?=&lt;/div&gt;)");

      if (m.Success)
        result = m.Value;

      return result;
    }