Problems with WebRequest

[Adam Stirk]

Hi,

I am trying to download a image that is generated by PHP using
HttpWebRequest, I believe the server uses cookies to generate the image, but
I keep getting the error image from the server.

Can anyone help?

The code I am using is :-

Uri myUrl = new
Uri("http://www.kingsofchao s.com/recruit.php?uni qid=84y75898");
HttpWebRequest myReq = (HttpWebRequest ) WebRequest.Crea te(myUrl);
myReq.CookieCon tainer = new CookieContainer ();

myReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET
CLR 1.0.3705)";
myReq.KeepAlive = true;

HttpWebResponse myResponse = (HttpWebRespons e) myReq.GetRespon se();
Console.WriteLi ne("\nThe HttpHeaders are \n\n\tName\t\tV alue\n{0}",
myResponse.Head ers);

string mySession = myResponse.Head ers["Set-Cookie"];

myResponse.Clos e();
myReq = (HttpWebRequest )
WebRequest.Crea te("http://www.kingsofchao s.com/imageclick.php" );
myReq.CookieCon tainer = new CookieContainer ();
myReq.Headers["Cookie"] = mySession;

Console.WriteLi ne("\nThe HttpHeaders are \n\n\tName\t\tV alue\n{0}",
myReq.Headers);

myReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET
CLR 1.0.3705)";
myReq.KeepAlive = true;

myResponse = (HttpWebRespons e) myReq.GetRespon se();
pictureBox1.Ima ge = Image.FromStrea m(myResponse.Ge tResponseStream ());
pictureBox1.Siz e = pictureBox1.Ima ge.Size;

myResponse.Clos e();
Thanks in advance

Adam

[Scott Allen]

Hi Adam:

You should not have to set the Cookie header yourself. Using:

CookieContainer cookies = new CookieContainer ();

You can than assign the cookies instance to both webrequests and the
cookies should be sent appropriately. For example, use the following
line on both instances of myReq:

myReg.CookieCon tainer = cookies;

HTH,

--
Scott
http://www.OdeToCode.com

On Sat, 21 Aug 2004 14:05:21 +0100, "Adam Stirk" <.> wrote:

Hi,

I am trying to download a image that is generated by PHP using
HttpWebRequest , I believe the server uses cookies to generate the image, but
I keep getting the error image from the server.

Can anyone help?

The code I am using is :-

Uri myUrl = new
Uri("http://www.kingsofchao s.com/recruit.php?uni qid=84y75898");
HttpWebReque st myReq = (HttpWebRequest ) WebRequest.Crea te(myUrl);
myReq.CookieCo ntainer = new CookieContainer ();

myReq.UserAgen t = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET
CLR 1.0.3705)";
myReq.KeepAliv e = true;

HttpWebRespons e myResponse = (HttpWebRespons e) myReq.GetRespon se();
Console.WriteL ine("\nThe HttpHeaders are \n\n\tName\t\tV alue\n{0}",
myResponse.Hea ders);

string mySession = myResponse.Head ers["Set-Cookie"];

myResponse.Clo se();
myReq = (HttpWebRequest )
WebRequest.Cre ate("http://www.kingsofchao s.com/imageclick.php" );
myReq.CookieCo ntainer = new CookieContainer ();
myReq.Header s["Cookie"] = mySession;

Console.WriteL ine("\nThe HttpHeaders are \n\n\tName\t\tV alue\n{0}",
myReq.Headers) ;

myReq.UserAgen t = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET
CLR 1.0.3705)";
myReq.KeepAliv e = true;

myResponse = (HttpWebRespons e) myReq.GetRespon se();
pictureBox1.Im age = Image.FromStrea m(myResponse.Ge tResponseStream ());
pictureBox1.Si ze = pictureBox1.Ima ge.Size;

myResponse.Clo se();
Thanks in advance

Adam

[Adam Stirk]

The problem I have got is the website returns 3 cookies in the header, but
when I call

myReg.CookieCon tainer.GetCooki es();

I only get 2, when there should be 3 as myResponse.Head ers["Set-Cookie"]
returns 3 cookies.

The example I supplied is the actual code I am trying to use, if you run it
your self you will see this.

HTH

Adam
"Scott Allen" <bitmask@[nospam].fred.net> wrote in message
news:p1******** *************** *********@4ax.c om...

Hi Adam:

You should not have to set the Cookie header yourself. Using:

CookieContainer cookies = new CookieContainer ();

You can than assign the cookies instance to both webrequests and the
cookies should be sent appropriately. For example, use the following
line on both instances of myReq:

myReg.CookieCon tainer = cookies;

HTH,

--
Scott
http://www.OdeToCode.com

On Sat, 21 Aug 2004 14:05:21 +0100, "Adam Stirk" <.> wrote:

Hi,

I am trying to download a image that is generated by PHP using
HttpWebRequest , I believe the server uses cookies to generate the image, butI keep getting the error image from the server.

Can anyone help?

The code I am using is :-

Uri myUrl = new
Uri("http://www.kingsofchao s.com/recruit.php?uni qid=84y75898");
HttpWebReque st myReq = (HttpWebRequest ) WebRequest.Crea te(myUrl);
myReq.CookieCo ntainer = new CookieContainer ();

myReq.UserAgen t = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; ..NETCLR 1.0.3705)";
myReq.KeepAliv e = true;

HttpWebRespons e myResponse = (HttpWebRespons e) myReq.GetRespon se();
Console.WriteL ine("\nThe HttpHeaders are \n\n\tName\t\tV alue\n{0}",
myResponse.Hea ders);

string mySession = myResponse.Head ers["Set-Cookie"];

myResponse.Clo se();
myReq = (HttpWebRequest )
WebRequest.Cre ate("http://www.kingsofchao s.com/imageclick.php" );
myReq.CookieCo ntainer = new CookieContainer ();
myReq.Header s["Cookie"] = mySession;

Console.WriteL ine("\nThe HttpHeaders are \n\n\tName\t\tV alue\n{0}",
myReq.Headers) ;

myReq.UserAgen t = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; ..NETCLR 1.0.3705)";
myReq.KeepAliv e = true;

myResponse = (HttpWebRespons e) myReq.GetRespon se();
pictureBox1.Im age = Image.FromStrea m(myResponse.Ge tResponseStream ());
pictureBox1.Si ze = pictureBox1.Ima ge.Size;

myResponse.Clo se();
Thanks in advance

Adam

[vMike]

"Adam Stirk" <.> wrote in message
news:41******** **************@ ptn-nntp-reader03.plus.n et...

Hi,

I am trying to download a image that is generated by PHP using
HttpWebRequest, I believe the server uses cookies to generate the image, but I keep getting the error image from the server.

Can anyone help?

The code I am using is :-

Uri myUrl = new
Uri("http://www.kingsofchao s.com/recruit.php?uni qid=84y75898");
HttpWebRequest myReq = (HttpWebRequest ) WebRequest.Crea te(myUrl);
myReq.CookieCon tainer = new CookieContainer ();

myReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET
CLR 1.0.3705)";
myReq.KeepAlive = true;

HttpWebResponse myResponse = (HttpWebRespons e) myReq.GetRespon se();
Console.WriteLi ne("\nThe HttpHeaders are \n\n\tName\t\tV alue\n{0}",
myResponse.Head ers);

string mySession = myResponse.Head ers["Set-Cookie"];

myResponse.Clos e();
myReq = (HttpWebRequest )
WebRequest.Crea te("http://www.kingsofchao s.com/imageclick.php" );
myReq.CookieCon tainer = new CookieContainer ();
myReq.Headers["Cookie"] = mySession;

Console.WriteLi ne("\nThe HttpHeaders are \n\n\tName\t\tV alue\n{0}",
myReq.Headers);

myReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET
CLR 1.0.3705)";
myReq.KeepAlive = true;

myResponse = (HttpWebRespons e) myReq.GetRespon se();
pictureBox1.Ima ge = Image.FromStrea m(myResponse.Ge tResponseStream ());
pictureBox1.Siz e = pictureBox1.Ima ge.Size;

myResponse.Clos e();
Thanks in advance

Adam

Here is an vb example of getting the graphic and displaying it as an image
on a website. Maybe it will help you.
Mike

<%@ Import Namespace="Syst em.Net" %>
<%@ Import Namespace="Syst em.IO" %>
<%@ Import Namespace="Syst em.Drawing" %>
<%@ import Namespace="Syst em.Drawing.Imag ing" %>

<html>
<script language="vb" runat="server">
Sub Page_Load(sende r as object, e as eventargs)
Dim myURL as Uri = new Uri("http://www.kingsofchao s.com/imageclick.php" )
Dim myReq as HttpWebRequest = WebRequest.Crea te(myUrl)

myReq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET
CLR 1.0.3705)"
myReq.KeepAlive = true
Response.Conten tType = "image/jpeg"
Dim myResponse as HttpWebResponse = myReq.GetRespon se()
Dim mynewimage as system.drawing. image =
system.drawing. image.fromstrea m(myResponse.Ge tResponseStream ())
mynewimage.Save (Response.Outpu tStream, ImageFormat.Jpe g)

end sub
</script>
<body>

</body>
</html>