CODEWITHSUNDEEP
c#javascripthtmlhttp
cycrel
cycrel

Reputation: 97

Web Server Does Not Allow Using Post Method

I want to connect a website with my user id and password and get my datas from website and store them in a text file, but I get error 405 that Method Not Allowed. Can somebody help me to figure out this? Here is the html code of webserver:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>blablbablablabl</title>
</head>
<script type="text/javascript">
function login() {
    setTimeout('window.close()',1000);
} 
</script>
<body>
<div><h3>blablablaasdasd</h3><form onSubmit="javascript:login();" style='margin-  top:10px;' id='loginPageForm' action='http://website.com' method='post' target='_blank'
<div>
<input name='t:ac' type='hidden'  value='$002f$002website.com$002fclient$002fdefault$002fsearch$002faccount$003f'  />
<input name='t:formdata' type='hidden' value='H4sIAAAAAAAAAJWQv0oDQRDGx4NAMJ1gEURstN2zMI02BkEQDgkc1mFvb7xs2Ntdd/ZMbKx8CRufQKz0CVLY+Q4+gI2FlYV7J6Lg/274mJnv932XD9CarMAyIXdiFA+4d0YnppB6czysCJ3mJZKDnnEF45aLETLPLZJ3Jz0mjEMlM5ZxQtbPgsiF35Wo8tUUfWXXDmad+8Xb5wjmEugIo8N3tR8+elhIxvyYx4rrIk69k7rYmloP8++uf8Hq/xdr4IxAorTKSkkkjZ5d5RuHTxd3EcDUfmtpOdHEuJyO4BSgwXyTfr2pT1qTJeh+sUU1hw9Btn8MIkxpjUbtiTXk/nOO8/Sxe3N9thNBlEBbKBm29xrvunpUWAahrr6R6qrbr+bD9Q/jCx9ggTUPAgAA' /></div>
<label for='identity'>Card Number:</label><div><input type='text' name='j_username'  /</div>
<div style='clear:both;'></div>
<label for='password'>Password:</label>
<div><input name='j_password' type='password' class='pass' value='' /><input type='submit' value='Login' /></div></form></div>
</body>
</html>

Here is the C# code that I am trying to reach server.

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://website.com/file.html");
        request.AllowAutoRedirect = true;  
        request.Timeout = 10000;           // timeout 10s
        request.Method = "POST";

        String formContent = "t:ac=$002f$002website.com$002fclient$002fdefault$002fsearch$002faccount$003f&t:formdata=H4sIAAAAAAAAAJWQv0oDQRDGx4NAMJ1gEURstN2zMI02BkEQDgkc1mFvb7xs2Ntdd/ZMbKx8CRufQKz0CVLY+Q4+gI2FlYV7J6Lg/274mJnv932XD9CarMAyIXdiFA+4d0YnppB6czysCJ3mJZKDnnEF45aLETLPLZJ3Jz0mjEMlM5ZxQtbPgsiF35Wo8tUUfWXXDmad+8Xb5wjmEugIo8N3tR8+elhIxvyYx4rrIk69k7rYmloP8++uf8Hq/xdr4IxAorTKSkkkjZ5d5RuHTxd3EcDUfmtpOdHEuJyO4BSgwXyTfr2pT1qTJeh+sUU1hw9Btn8MIkxpjUbtiTXk/nOO8/Sxe3N9thNBlEBbKBm29xrvunpUWAahrr6R6qrbr+bD9Q/jCx9ggTUPAgAA&j_username=johndoe0&j_password=12345";

        byte[] byteArray = Encoding.UTF8.GetBytes(formContent);
        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = byteArray.Length;
        Stream dataStream = request.GetRequestStream();
        dataStream.Write(byteArray, 0, byteArray.Length);
        dataStream.Close();
       // Get the response ...
        WebResponse response;
        response = (HttpWebResponse)request.GetResponse();//ERROR OCCURS HERE!!! 
        dataStream = response.GetResponseStream();
        StreamReader reader = new StreamReader(dataStream);
        richTextBox1.AppendText(HttpUtility.UrlDecode(reader.ReadToEnd()));
        reader.Close();
        dataStream.Close();
        response.Close();

EDIT: Problem solved, found another URL in that website that allows POST method.

Upvotes: 0

Views: 3666

Answers (3)

LexLythius
LexLythius

Reputation: 1944

@GSiry's solution is probably the way to go if you control the server you fetch data from.

Otherwise, the issue is about adjusting your request to whatever HTTP method the remote server accepts: Method Not Allowed is supposed to mean that server won't take some particular methods while accepting others, and for good reasons. See more on request safety and idempotence.

What happens if you use GET instead of POST?

EDIT: Assuming you are really POSTing to the same web URL from both the HTML form and your C# request (which does not seem to be the case anyway), the reason why it behaves differently is not obvious and is in fact server implementation-dependent. Which means we can only do guesswork (for example, it might not like the user agent it gets (or lack thereof) from your C# code.

Anyway, I stand by the advice of using GET. There seems to be no reason at all to issue a POST request, since you don't intend to modify website.com/file.html, which is the stated purpose of POST method.

EDIT2: Its not necessary to use POST for a login per se. HTTP authentication can be performed through form parameters, through HTTP request headers or through the own authoritative part of the domain name (http://username:[email protected]/your_file.html). But this depends exclusively on the concrete server implementation.

If you can't access the server logs, I'm afraid you're in for some trial-and-error session. Start by mimicking the browser's request exactly. Firebug, Chrome's or Safari's developer console will be your friends to see exactly what headers are being passed along with the browser request so that the POST method is allowed.

On a side note, what you should be using for authentication procedure is SSL/TLS (https://...)

Upvotes: 1

Yuriy Galanter
Yuriy Galanter

Reputation: 39777

If you're trying to access a WebService add following section to target's site Web.config under System.Web:

<webServices>
   <protocols>
      <add name="HttpPost"/>
   </protocols>
</webServices>

Upvotes: 0

G-Man
G-Man

Reputation: 7241

If you are using MVC, it might be as simple as adding the 

[HttpPost]

attribute to the controller function that accepts your post request

Upvotes: 1

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