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]

Re: Problems with WebRequest

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:
[color=blue]
>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
>
>
>[/color]

[Adam Stirk]

Re: Problems with WebRequest

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:p1qei0t1oi pepa1q7jdl9alu0 9pm4hk2ca@4ax.c om...[color=blue]
> 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:
>[color=green]
> >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,[/color][/color]
but[color=blue][color=green]
> >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;[/color][/color]
..NET[color=blue][color=green]
> >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;[/color][/color]
..NET[color=blue][color=green]
> >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
> >
> >
> >[/color]
>[/color]

[vMike]

Re: Problems with WebRequest


"Adam Stirk" <.> wrote in message
news:41274892$0 $7085$ed2619ec@ ptn-nntp-reader03.plus.n et...[color=blue]
> 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,[/color]
but[color=blue]
> 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
>
>
>
>[/color]
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>