Multithreading - How Are Threads Tied To Requests Through Http.sys, IIS
Jan 29, 2011
I'm currently reading a lot about node.js. There is a frequent comparison between servers using a traditional thread per request model (Apache), and servers that use an event loop (Nginx, node, Tornado).
I would like to learn in detail about how a request is processed in ASP.NET - from the point it is received in http.sys all the way up to it being processed in ASP.NET itself. I've found the MSDN documentation on http.sys and IIS a little lacking, but perhaps my google-fu is weak today. So far, the best resource I have found is a post on Thomas Marquardt's Blog.
Could anyone shed more light on the topic, or point me to any other resources?
View 1 Replies
Similar Messages:
Feb 6, 2011
I have what I consider a pretty complex situation that I am not sure if it can even be accomplished via an ASP.NET web application. (I am using aps.net 4.0) But what I want to do is design a "online auction site" that can handle many autions running at the same time. So I can only imagine eBay and all the other millions of auction sites out there are all doing this someway or another. My biggest concern is that I want to make sure the design here to make the site as effiecent as possible. Here is specifically what I am trying to figure out.
I think I need to create an object (per active auction) that stays in memory for the life of the auction. This object would have at least the following information:
Aution ID, time remaining, highest bidder id, bid price, Thread Control Variable, etc...
Now here is the tricky part that I think is vital for auction sites. Lets say you have 500 users on my website that are all watching the same auction and it is getting down to the last second of the auction and they all click to place a bid at the same time. Keep in mind this may also be at the same time hundreds of other users are placing bids for other auctions going on all at the same time.
How do I get all these requests (bids), for a single auction, lined up so that they are processed "one at a time"? But some how I need to be able to make all requests wait in a queue until it is their "turn" then I would need to be able to update the in memory object, write a record into a SQL database and then begin returning information back to each user.
Based on other development languages I have used in the past I know their were objects that I could create that could be used to get multiple threads to run in order (in other words syncronized). Usually it would be a case where I would be listening on a server socket and could do something like ThreadVariable.Lock, <process the request>, thenThreadVariable.Unlock. What that would do, is force all threads that tried to call ThreadVariable.Lock to wait until no other threads had the variable locked then it could proceed. Obviously the code it processes between the lock and unlock should be as quick and effecient as possible so it does not create a major traffic jam.
Because my thinking is this "object" I am referring to as being in memory, most likely will play a big role in answering the question about getting the requests in a "one at a time" situation it may be the focus of the question is more like how would I create "an object" and store it in memory to be quickly and easily accessed?
And even more generically does this even sound like I am on the right track
I think the topic of "communication to and from users" will need to be a completly different thread.
View 5 Replies
Jun 18, 2010
What's the simplest and most effective way to selectively redirect HTTP requests to your ASP.NET page to its HTTPS equivalent? For example, if my page site URL is [URL], I want to redirect some (or all) page requests to [URL] What's the easiest way to do that?
View 2 Replies
Mar 30, 2011
Im getting no postback on my button? I have it tied to Javascript like so:
<script type="text/javascript">
function confirm_delete()
{
if (confirm("Are you sure you want to delete this comment?")==true)
return true;
else
return false;
}
</script>
<p>
<asp:Button ID="btn" OnClientClick="if(confirm_delete()){/* post back*/}else{return false;};" OnClick="btnDelete_Click" runat="server" CssClass="Btn" Text="delete"/>
But when I click ok on confirm no postback is initiated, its initiated if I click the button manually?
private void PopulateWallPosts(string userId)
{
using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;"))
{
cn.Open();
using (OdbcCommand cmd = new OdbcCommand("SELECT idWallPosting, wp.WallPostings, p.PicturePath FROM WallPosting wp LEFT JOIN User u ON u.UserID = wp.UserID LEFT JOIN Pictures p ON p.UserID = u.UserID WHERE wp.UserID=" + userId + " ORDER BY idWallPosting DESC", cn))
{
//("SELECT wp.WallPostings, p.PicturePath FROM WallPosting wp LEFT JOIN [User] u ON u.UserID = wp.UserID LEFT JOIN Pictures p ON p.UserID = u.UserID WHERE UserID=" + userId + " ORDER BY idWallPosting DESC", cn))
using (OdbcDataReader reader = cmd.ExecuteReader())
{
test1.Controls.Clear();
while (reader.Read())
{
System.Web.UI.HtmlControls.HtmlGenericControl div = new System.Web.UI.HtmlControls.HtmlGenericControl("div");
div.Attributes["class"] = "test";
div.ID = String.Format("{0}", reader.GetString(0));
// this line is responsible, problem here and my sqlsntax, im trying to set the SELECT idWallPosting for the div ID
Image img = new Image();
img.ImageUrl = String.Format("{0}", reader.GetString(2));
img.AlternateText = "Test image";
div.Controls.Add(img);
div.Controls.Add(ParseControl(String.Format(" " + "{0}", reader.GetString(1))));
div.Attributes.Add("onclick", "return confirm_delete();");
div.Style["clear"] = "both";
test1.Controls.Add(div);
}
}
}
}
}
protected void btnDelete_Click(object sender, EventArgs e)
{
string id = "ctl00_ContentPlaceHolder1_ContentPlaceHolder2_26";
string[] idFragments = id.Split('_');
id = idFragments[idFragments.Length - 1];
//serverside code if confirm was pressed.
using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;"))
{
cn.Open();
using (OdbcCommand cmd = new OdbcCommand("DELETE FROM WallPosting WHERE idWallPosting = " + id + ")", cn))
{
cmd.ExecuteNonQuery();
}
}
//PopulateWallPosts();
}
EDIT: Tryed this,
function confirm_delete()
{
if (confirm("Are you sure you want to delete this comment?")==true)
return true;
else
return false;
}
</script>
<p>
<asp:Button ID="btn" OnClientClick="return confirm_delete();" OnClick="btnDelete_Click" runat="server" CssClass="Btn" Text="delete"/>
still no postback
View 2 Replies
Mar 21, 2011
How can I capture all the http requests for a particular URL in .NET?
View 1 Replies
Jan 20, 2011
I m invoking a web service and i would like to know if i get the raw http request?
View 4 Replies
Sep 10, 2010
If I want to have log of all requests made within a web site including any http bad requests, is this possible?
For e.g I want to be able to see if every http request from the site including any for images that don't exist etc.
All the things an IIS log has.
Is this possible with HTTP Module or something like the ASP.net Health monitoring?
View 1 Replies
Dec 13, 2010
I need to monitor my application from incoming http post and get requestf originating from outside and sometimes inside the machine.
Is this possible?
Been using fiddler but this only does outgoing not incoming (from outside the machine) or have I configured it incorrectly?
This is for my web app that is meant to be receiving a POST from an external server.
View 6 Replies
Aug 11, 2010
Is it possible to send multiple HTTP requests asynchronously to an ASP.NET web site or any other web server using .NET ? And, then. collect responses from those requests as they come using .NET asynchronous paradigm ? Is it possible ? Or would there still be limit of max 2 HTTP connections from .NET using HTTP ?
View 1 Replies
Dec 10, 2010
For an ASP.NET 4.0 / IIS7 web app, I would like to support compressed HTTP requests. Basically, I would like to support clients that would add Content-Encoding: gzip in the request headers, and compress the body accordingly.
Does anyone known how I achieve such a behavior?
View 1 Replies
Oct 5, 2010
Here's the big picture. We're running a server in IIS 6 that hosts several web sites and applications, and we're in the process of moving the whole thing to a different data center with a slightly different setup. We've notified our users and updated our DNS info so that theoretically everyone will be happily hitting the new server from day 1, but we know that someone will inevitably fall through the cracks.
The powers that be want a "Listener" page/handler that will receive all requests to the server and log the entire request to a text file, including (especially) POST data.
That's where I'm stuck. I don't know how to implement a single handler that will receive all requests to the server. I vaguely understand IIS 6 redirection options, but they all seem to lose the POST data on the redirect. I also know a little about IIS 6's built-in logging, but it ignores POST data as well.
Is there a simple(ish) way to route all requests to the server so that they all hit a single handler, while maintaining post data?
View 1 Replies
Jan 20, 2010
I need to visit a URL, find a specific text box in said page - fill it with data and then submit a form.
How can I accomplish this in C#?
View 2 Replies
Apr 13, 2010
I want to sniff a local HTTP request to an ASP.NET web application.
Is telnet an option?
How do you capture packets to a web application?
View 6 Replies
Aug 25, 2010
The objective of this component is to be able to forward whatever HTTP requests it receives to forward to a different server based on the parameters but keeping the URL and POST data intact. For example:
If the component receives
[URL]
It will return the response from either
[URL]
where XYZ can be valid name of the page. I think I can probably individually create each page to do a Response.Redirect but i am wondering if there is a more generic way to do this? In addition, is this something I have to configure on the IIS level rather than code level?
View 1 Replies
Nov 15, 2010
In my ASP.NET application I set
<system.web><globalization culture="pl-PL" uiCulture="pl-PL" />
to have numbers and dates in this culture.
Surprisingly I noticed that methods invoked from job scheduler (Quartz library) use en-US? Why is that?
View 1 Replies
May 6, 2010
I have web services built with ASP.NET and ASP.NET clients consuming them. When consuming the webservices, how would I to force the clients to use https?
I don't want to force the whole site to use https by turning on require SSL in IIS.
Can I use the IIS7 URL rewrite module to re-route http requests to https?
View 2 Replies
Sep 9, 2010
I have a long poll HTTP request using ASP.NET 4, MVC 2 and AsyncController. If a user closes their browser and kills the HTTP connection without the request completing, I'd like to know about it and completely clean up after them. If I don't, the open and incomplete requests just sit there and eventually IIS stops accepting new requests.
You can simulate my long running HTTP request by making a normal ASP.NET application with a page that has a Thread.Sleep. Even if you close the browser, the request carries on as if it hasn't.
There is a property called Response.IsClientConnected that gets switched to false if the client disconnects, and I can poll this to achieve the desired effect but it's not very clean and I'd like to avoid polling. Is there a way of getting notified when this happens rather than having to poll this property?
View 1 Replies
Apr 4, 2011
When I was reading the blog Using jQuery to Consume ASP.NET JSON Web Services
I have seen this argument:
"By using jQuery to call the web service directly, we've eliminated over 100 KB of JavaScript and three extra HTTP requests. "
Why does the ASP.NET AJAX call to a .NET Web-Service needs 3 extra HTTP requests? What are those requests? (I wonder how jQuery manages the call with lesser HTTP requests in this case).
View 2 Replies
Jan 27, 2011
I'm using HttpContext.Current.Items to make a Per-Request Cache Store. I'm hitting to many Cache entries over different http requests.
It seems that HttpContext.Current.Items is reused across multiple http requests. Is it normal?
View 2 Replies
Mar 16, 2011
I use four different update panels, that use the same timer as trigger.
1) Will the 4 update panels create 4 different HTTP requests to the server?
2) I'm using 4 different panels as the controls are located in different parts of the page, is there a way of putting them in the same update panel?
3) Is this a good coding practice?
View 2 Replies
Jan 12, 2011
Hi! OK, I'm quite new to web developing and this is a bit difficult to define abstractly so I'll say exactly what I'm trying to do:
I have an asp.net website running on my server. I want to have other websites to have a button which redirects to a specific URL. This URL is determined during the creation (server side) of the other website. I want the other website to request that URL by supplying certain parameters. I'll create the URL accordingly and return a response which contains the URL.
To clarify: User browses other website, gets to page which is supposed to have said button, other website requests URL, supplies params, receives URL and creates page with button with URL received.
It's important to me that this works with any platform of "other" website. What is the simplest way to do this?
View 2 Replies
Aug 31, 2010
It is very difficult to find debugging a solution for a web service in .net
How to debug a SOAP message
View 1 Replies
Sep 8, 2010
So there is a a table and a text box in one of the cells
<td>
<asp:TextBox ID="tbSomeTextBox" Columns="5" runat="server"> %
</td>
This textbox gets shown if a certain selection is made in a drop down. The problem is that I would like the "%" character to also be hidden or shown with the textbox.
I have tried putting the whole textbox control inside a DIVand in my JQuery hiding the DIV at the same time I hid the textbox.
<td>
<div id="divSomeDIV"><asp:TextBox ID="tbSomeTextBox" Columns="5" runat="server"> % </div
</td>
But I get an error in my java script that id="divSomeDIV" doesn't exist in the current context.
$("#<%=divSomeDiv.ClientID%>").hide();
Wrapping that single character in a asp:Label seems like overkill.
View 3 Replies
Feb 22, 2010
I have a GridView tied to an XmlDataSource to take advantage of the edit/update/delete capabilities GridView inherently offers. XmlDataSource offers no update event handling so that must be performed manually. I have no problem with this. My problem is how/where can I catch this update event to perform my custom handling.
View 1 Replies
Aug 26, 2010
Curious what the best practice is for returning errors to a view from a controller where the error isn't really a validation error, but more like "user not found" or "service timeout" type of errors. (in ASP.NET MVC2 framework)
I've been adding them to the ModelState's model errors, but that doesn't seem appropriate. (although easy to implement and maintain)
Example - A user tries to log in, and their credentials do not match a known user.
View 1 Replies
