HttpWebRequest using Basic authentication

Question

I m trying to go through an authentication request that mimics the  basic auth request  we re used to seeing when setting up IIS for this behavior   The URL is  https   telematicoprova agenziadogane it TelematicoServiziDiUtilitaWeb ServiziDiUtilitaAutServlet UC 22 amp SC 1 amp ST 2  warning  https    This server is running under UNIX and Java as application server   This is the code I use to connect to this server   CookieContainer myContainer   new CookieContainer    HttpWebRequest request    HttpWebRequest WebRequest Create  https   telematicoprova agenziadogane it TelematicoServiziDiUtilitaWeb ServiziDiUtilitaAutServlet UC 22 amp SC 1 amp ST 2    request Credentials   new NetworkCredential xxx xxx   request CookieContainer   myContainer  request PreAuthenticate   true  HttpWebResponse response    HttpWebResponse request GetResponse       I copied this from another post on this site   But I receive this answer from the server      The underlying connection was closed  An unexpected error occurred on   a send    I think I tried every possible task my knowledge on C  has to offer me  but nothing

User · Answer

The spec can be read as  ISO-8859-1  or  undefined   Your choice  It s known that many servers use ISO-8859-1  like it or not  and will fail when you send something else   For more information and a proposal to fix the situation  see http   greenbytes de tech webdav draft-reschke-basicauth-enc-latest html

User · Answer

Following code will solve json response if there Basic Authentication and Proxy implemented Also IIS 7 5 Hosting Problm will resolve   public string HttpGetByWebRequ string uri  string username  string password      For Basic Authentication     string authInfo   username         password      authInfo   Convert ToBase64String Encoding Default GetBytes authInfo       For Proxy     WebProxy proxy   new WebProxy  http   10 127 0 1 8080   true        HttpWebRequest request    HttpWebRequest WebRequest Create uri       request Method    GET       request Accept    application json  charset utf-8       request Proxy   proxy       request Headers  Authorization      Basic     authInfo       var response    HttpWebResponse request GetResponse         string strResponse           using  var sr   new StreamReader response GetResponseStream                   strResponse  sr ReadToEnd                return strResponse

User · Answer

The following construction was not working correctly for me   request Credentials   new NetworkCredential  user    pass      I have used CredentialCache instead   CredentialCache credentialCache   new CredentialCache                 new Uri   http    request Host       Basic           new NetworkCredential  user    pass            request Credentials   credentialCache    However  if you would like to add multiple basic auth credentials  for example if there is redirection that you are aware of  you can use following function that I have made   private void SetNetworkCredential Uri uriPrefix  string authType  NetworkCredential credential        if  request Credentials    null                request Credentials   new CredentialCache               if  request Credentials GetCredential uriPrefix  authType     null                 request Credentials as CredentialCache  Add uriPrefix  authType  credential             I hope it will help somebody in the future

User · Answer

Try this   System Net CredentialCache credentialCache   new System Net CredentialCache     credentialCache Add      new System Uri  http   www yoururl com          Basic        new System Net NetworkCredential  username    password                httpWebRequest Credentials   credentialCache

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If you can use the WebClient class  using basic authentication becomes simple   var client   new WebClient  Credentials   new NetworkCredential  user name    password     var response   client DownloadString  https   telematicoprova agenziadogane it TelematicoServiziDiUtilitaWeb ServiziDiUtilitaAutServlet UC 22 amp SC 1 amp ST 2

User · Answer

First thing  for me ServicePointManager SecurityProtocol   SecurityProtocolType Tls12 worked instead of Ssl3   Secondly  I had to send the Basic Auth request along with some data  form-urlencoded   Here is the complete sample which worked for me perfectly  after trying many solutions   Disclaimer  The code below is a mixture of solutions found on this link and some other stackoverflow links  thanks for the useful information           ServicePointManager SecurityProtocol   SecurityProtocolType Tls12          String username    user name           String password    password           String encoded   System Convert ToBase64String System Text Encoding GetEncoding  ISO-8859-1   GetBytes username         password               Form Data         var formData    var1 val1 amp var2 val2           var encodedFormData   Encoding ASCII GetBytes formData            HttpWebRequest request    HttpWebRequest WebRequest Create  THE URL            request ContentType    application x-www-form-urlencoded           request Method    POST           request ContentLength   encodedFormData Length          request Headers Add  Authorization    Basic     encoded           request PreAuthenticate   true           using  var stream   request GetRequestStream                          stream Write encodedFormData  0  encodedFormData Length                      HttpWebResponse response    HttpWebResponse request GetResponse            var responseString   new StreamReader response GetResponseStream    ReadToEnd

User · Answer

You can also just add the authorization header yourself   Just make the name  Authorization  and the value  Basic BASE64  USERNAME PASSWORD     String username    abc   String password    123   String encoded   System Convert ToBase64String System Text Encoding GetEncoding  ISO-8859-1   GetBytes username         password    httpWebRequest Headers Add  Authorization    Basic     encoded     Edit  Switched the encoding from UTF-8 to ISO 8859-1 per What encoding should I use for HTTP Basic Authentication  and Jeroen s comment

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I finally got it   string url     https   telematicoprova agenziadogane it TelematicoServiziDiUtilitaWeb ServiziDiUtilitaAutServlet UC 22 amp SC 1 amp ST 2   WebRequest request   WebRequest Create url   request Credentials   GetCredential    request PreAuthenticate   true    and this is GetCredential    private CredentialCache GetCredential         string url     https   telematicoprova agenziadogane it TelematicoServiziDiUtilitaWeb ServiziDiUtilitaAutServlet UC 22 amp SC 1 amp ST 2       ServicePointManager SecurityProtocol   SecurityProtocolType Ssl3      CredentialCache credentialCache   new CredentialCache        credentialCache Add new System Uri url    Basic   new NetworkCredential ConfigurationManager AppSettings  ead username    ConfigurationManager AppSettings  ead password          return credentialCache      YAY

User · Answer

One reason why the top answer and others wont work for you is because it is missing a critical line   note many API manuals leave out this necessity  request PreAuthenticate   true

User · Answer

For those using RestSharp  it might fail when using SimpleAuthenticator  possibly due to not using ISO-8859-1 behind the scene   I managed to get it done by explicitly sending Basic Authentication headers   string username          string password           public IRestResponse GetResponse string url  Method method   Method GET        string encoded   Convert ToBase64String Encoding GetEncoding  ISO-8859-1   GetBytes    username   password          var client   new RestClient url       var request   new RestRequest method        request AddHeader  Authorization     Basic  encoded         IRestResponse response   client Execute request       return response     var response   GetResponse url   txtResult Text   response Content

[c#] HttpWebRequest using Basic authentication

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