Need help with Proxy authentication in C#

[Thomas D]

Hello,

I'm trying to instantiate a new AdWordsUser, for that I use the App.Config file by changing the parameters:

<add key="ProxyServer" value="http://myproxy.mydomain:8080"/> 

<add key="ProxyUser" value="Thomas"/>

<add key="ProxyPassword" value="pwd"/>

<add key="ProxyDomain" value="MyDomain"/>

in my Main method:

static void Main(string[] args)

{

   AdWordsUser user = new AdWordsUser();

}

But when I run my project, I get an error 407: proxy authentication required.

My proxy parameters are correct, I have check them in another project which need proxy authentication.

Am I doing something wrong?

I'm using v201101 of the API and visual studio 2010

Thanks for your answers

Thomas

[j.th...@pilot.de]

Hi Thomas,

did you find a solution? I face the same problem and have no idea why
this error emerges. I'd appreciate every hint that helps.
Thank you!

#Jo

[Thomas D]

Hi Jo,

The problem comes from the AdWordsUser constructor: it try to authenticate the user before applying the proxy settings...

I use a method which get the authtoken and use another method to instantiate the AdWordsUser to solve the problem.

To get the authtoken:

public static string GetAuthToken()

        {

            WebRequest webRequest = HttpWebRequest.Create("https://www.google.com/accounts/ClientLogin");

            webRequest.Method = "POST";

            webRequest.ContentType = "application/x-www-form-urlencoded";

            WebProxy proxy = new WebProxy("myProxy", port);

            NetworkCredential credentials = new NetworkCredential();

            credentials.UserName = "username";

            credentials.Password = "pwd";

            credentials.Domain = "mydomain";

            proxy.Credentials = credentials;

            webRequest.Proxy = proxy;

            

            

            string postParams =

                "accountType=" + HttpUtility.UrlEncode("GOOGLE") +

                "&Email=" + HttpUtility.UrlEncode("") +

                "&Passwd=" + HttpUtility.UrlEncode("") +

                "&service=" + HttpUtility.UrlEncode("adwords") +

                "&source=" + HttpUtility.UrlEncode(string.Format("{0}-{1}-{2}", "",

                    "", "0.0"));

            byte[] postBytes = Encoding.UTF8.GetBytes(postParams);

            webRequest.ContentLength = postBytes.Length;

            using (Stream strmReq = webRequest.GetRequestStream())

            {

                strmReq.Write(postBytes, 0, postBytes.Length);

            }

            string retVal = "";

            try

            {

                WebResponse response = webRequest.GetResponse();

                using (StreamReader reader = new StreamReader(response.GetResponseStream()))

                {

                    string sResponse = reader.ReadToEnd();

                    string[] splits = sResponse.Split('\n');

                    foreach (string split in splits)

                    {

                        string[] subsplits = split.Split('=');

                        if (subsplits.Length >= 2 && subsplits[0] == "Auth")

                        {

                            retVal = subsplits[1];

                        }

                    }

                }

            }

            catch (WebException ex)

            {

                throw new ApplicationException("Could not generate auth token.", ex);

            }

            return retVal;

        }

The AdWordsUser instantiation:

       Dictionary<String, String> dic = new Dictionary<String, String>();

        dic.Add("authToken", GetAuthToken() );

        

        AdWordsUser user = new AdWordsUser(dic);

        user.Config.Proxy.Address = new Uri("http://yourProxy:port");

        NetworkCredential cred = new NetworkCredential();

        cred.UserName="";

        cred.Password="";

        cred.Domain="";

        user.Config.Proxy.Credentials = cred;

You can use the API now!

Thomas

[Kevin Winter]

Hi Thomas,

  Out of curiosity, what version of the .NET client library are you using?  It's possible you may be using an out of date version.

- Kevin Winter

AdWords API Team

[Thomas D]

I use the v201101 of the client library

[AdWords API Advisor]

Hi Thomas,

Which version of the library (not the API) are you using? The latest version is 12.4.0. I'm trying to replicate the issue you are mentioning, but so far I'm out of luck.

Cheers,
Anash P. Oommen,

AdWords API Advisor.

[Thomas D]

Hi Anash,

It's the version 12.3.0

[AdWords API Advisor]

Hi Thomas,

I still can't replicate this issue. I'm using v12.4.0, but the proxy code hasn't changed from v12.3.0. Here's how I am testing, that may give a hint about what's going wrong.

- Setup a proxy using squid: http://news.softpedia.com/news/Seting-Up-a-HTTP-Proxy-Server-with-Authentication-and-Filtering-52467.shtml
- Downloaded http://google-api-adwords-dotnet.googlecode.com/files/awapi_dotnet_lib_src_12.4.0.zip.
- Extracted the project and opened AdWords.v2008.sln in VS 2008.
- Set the proxy url, username, password in examples\csharp\App.config.
- Set Developer token, Email, password, ClientEmail in examples\csharp\App.config
- Run AdWords.Examples.CSharp with command line argument as v201101.GetAllCampaigns.

My call fails for wrong username/password (407 Proxy Authentication required) and succeeds for the right username/password in App.config.