XMLHttp from Server

[Dave H]

I want to use XMLHTTP or something like it from my server code.

I'm trying to call a web page, and I want the results back into a string.

ideas? Thanks, Dave

 

[Robbe Morris [C# MVP]]

There is a sample that is application to both the .NET Compact Framework
and the .NET Framework.

Search for "bool Upload" in this article

http://www.eggheadcafe.com/articles/compactframeworkencryption.asp

 

[Steven Cheng[MSFT]]

Hi Dave,

As for calling a web page and get the response stream text, where will you
make this call ? In your ASP.NET web application 's serverside code( .net
managed code) or in clientside script code?

If the call is made in asp.net serverside code( c# or vb.net), I think we'd
better use the HttpWebRequest class in the .net 's BCL which has more
powerful functions on http network processing such as making http get/post
request and get the response stream, here is a tech article discussing on
this:

#How To: Fetching Web Pages with HTTP
http://www.csharp-station.com/HowTo/HttpWebFetch.aspx

If you're making the call in clientside script, you can consider using
XMLHttp, here are the MSDN reference on using IXMLHTTPRequest ( XMLHttp is
one of the implementation of that COM interface):

#IXMLHTTPRequest
http://msdn.microsoft.com/library/en-us/xmlsdk/html/xmobjXMLHttpRequest.asp?
frame=true

#Using Microsoft's XMLHTTP Object to Get Data From Other Web Pages
http://www.4guysfromrolla.com/webtech/110100-1.shtml

@@@Note: in clientside code, we use XMLHTTP, however, in serverside code
(such as classic asp page or other server app), we should use ServerXMLHTTP
instead:

#How To Submit Form Data by Using XMLHTTP or ServerXMLHTTP Object
http://support.microsoft.com/default.aspx?scid=kb;en-us;290591


BTW, All the MSXML component (COM based) are not supported to use in .net
managed code, we should always use the buildin .net fundamental class
library's components if possible.

#INFO: Use of MSXML is Not Supported in .NET Applications
http://support.microsoft.com/default.aspx?scid=kb;en-us;815112

Hope helps. Thanks,

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)

 

[Dave H]

I've done it from client side JS code, I wanted the same type from ASP
server side code.

Thanks to you both... Dave

 

[Steven Cheng[MSFT]]

Thanks for your prompt response Dave,

So since you are wanting to do it at serverside, we have the following
means:

1. Using ServerXMLHTTP component in classic ASP page , we can just
vbscript or jscript in asp page.

#Using ServerXMLHTTP Directly
http://msdn.microsoft.com/library/en-us/xmlsdk/html/xmobjxmldomserverxmlhttp
_using_directly.asp?frame=true

2. Using HttpWebRequest class in asp.net web page, we can use C# or VB.NET.

http://msdn.microsoft.com/library/en-us/cpref/html/frlrfSystemNetHttpWebRequ
estClassGetResponseTopic.asp?frame=true


For your convenience, I've pasted two test code snippet below. Hope helps.


ASP server code (JScript)
===========================
<%@ Language="JScript" %>

<%

var url = "http://www.asp.net";
var objSrvHTTP;
objSrvHTTP = Server.CreateObject ("Msxml2.ServerXMLHTTP.3.0");
objSrvHTTP.open ("GET",url, false);
objSrvHTTP.send ();

Response.Clear();
Response.ContentType = "text/html";
Response.Write (objSrvHTTP.responseText);
Response.End();

%>
============================


ASP.NET serverside code (C#)
============================
private void Page_Load(object sender, System.EventArgs e)
{
string url = "http://www.w3.org";

HttpWebRequest webreq = WebRequest.Create(url) as HttpWebRequest;

webreq.Method = "GET";

//specify proxy if necessary
//webreq.Proxy = new WebProxy("xxxx",80);

HttpWebResponse webrep = webreq.GetResponse() as HttpWebResponse;

StreamReader sr = new StreamReader(webrep.GetResponseStream());

string responseHtml = sr.ReadToEnd();

sr.Close();
webrep.Close();


Response.ClearContent();
Response.Write(responseHtml);
Response.End();
}


============================


Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)