Http - Extract Header Info From A Get Request On A Remote URL?
Sep 10, 2010I want to perform a get request on a remote URL and then extract the headers returned.
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<webServices>
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Content-Type: text/xml
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: ro
Host: localhost
mymethod: urn:[URL]
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Response.AddHeader("key", "password-key-from-hotel");
On the client side I have a form:
<form ... action="www.link-to-another-domaint" >
<input type="hidden" id="asd" value="fgh" >
....
</form>
<script type="text/javascript">
document.forms[0].submit();
</script>
Then on the other domain - there is also my other application - I'm trying to get the hedaer "key" by this code:
Request.Headers["key"].ToString();
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[Code]...
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[Code]....
How To Hunt Down HTTP Request
Feb 25, 2010It uses asp.net (webforms), bunch of jquery plugins and whatnot.
Problem: there's unnecessary HTTP request to localhost/undefined and that makes every request take ~1s longer than needed.
Question: is there any tactic to find guilty code?
Clue: undefined makes me think that there's JS involved.
Firebug log:
GET /undefined HTTP/1.1
Host: localhost:17817
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; lv; rv:1.9.2) Gecko/20100115
Firefox/3.6
Accept: image/png,image/;q=0.8,/*;q=0.5
Accept-Language: lv,en-us;q=0.7,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-13,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
Referer: http://localhost:17817/Default.aspx
if you right click a line in the code, it gives you a conditional breakpoint. Check the name of the variable that has the URL value, and set a condition when typeof URL === 'undefined' or url === 'undefined' and look at the stack
Just set breakproint at line 3400 (with no conditions). It does not go through there.
3397 ajax: function( s ) {
3398 // Extend the settings, but re-extend 's' so that it can be
3399 // checked again later (in the test suite, specifically)
3400 s = jQuery.extend(true, s, jQuery.extend(true, {}, jQuery.ajaxSettings, s));
Narrowed issue down a bit => commented out 1 ascx controller that renders some images and uses gallerific jquery plugin and magic request dissapeared.
Problem was with galleriffic plugin initialization. It couldn't find anchor and it's href for creating thumbnails when there were no images or something. It's cool now...
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1 It could accept 3 Url parameters param1, param2 and param3, and the request looks like this,
http://mysite.com/foo.aspx?parame1=abc¶m2=def¶m3=ghi
2 When the page is responsed to client browser, I want to display a text input and a submit button nearby in the result html page, and value of text input is the same as param1, in this sample, abc will be displayed in text box, in the browser address bar, I want to keep the original long url http://mysite.com/foo.aspx?parame1=abc¶m2=def¶m3=ghi;
3 When the user change the value in text input, and click submit button, I want to send this request again to foo.aspx, and changing the param1 value to the value which user entered in text input, and at the same time, keep values of parame2 and param3 the same as last request's response. For example, when user requests http://mysite.com/foo.aspx?parame1=abc¶m2=def¶m3=ghi, and the page displays, when user changes text input from abc to google, the new request will be http://mysite.com/foo.aspx?parame1=google¶m2=def¶m3=ghi
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Exception information:
Exception type: HttpException
Exception message: Server cannot append header after HTTP headers have been sent.
at System.Web.Hosting.ISAPIWorkerRequest.SendUnknownResponseHeader(String name, String value)
[code]....
I tried to debug the WebSite but it just does not show in debugger. The web page which has got this issue contains the following.
Its a content page with a Master page.
It has a grid inside an UpdatePanel which is Triggered by a Timer.
On the specified time grid data is refreshed.
Everytime this happens we see a new warning in the EventLog.
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Oct 6, 2010I've tried to write my own HttpModule (IHttpModule) that adds a Header like that:
public class MyModule: IHttpModule
{
public void Init(HttpApplication c)
{
c.BeginRequest += delegate{c.Response.AddHeader("MyHeader", "MyValue");};
}
public void Dispose(){}
}
and tried to read in a aspx page like that:
var x = Request.ServerVariables["MyHeader"];
