How To Edit HTTP Request With Fiddler

Aug 5, 2010

Is it possible to edit HTTP request using fiddler so that my asp.net application hosted elsewhere return true for the following code block

HttpContext.Current.Request.Url.Host == "localhost"

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I there a way to know if a request is a soap request on AuthenticateRequest event for HttpApplication? Checking ServerVariables["HTTP_SOAPACTION"] seems to not be working all the time.

public void Init(HttpApplication context) {
context.AuthenticateRequest += new EventHandler(AuthenticateRequest);
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app = sender as HttpApplication;
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I have disabled HTTP POST and HTTP GET for webservices in my web.config file.
<webServices>
<protocols>
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<add name="AnyHttpSoap" />
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Looking at ContentType for soap+xml only partially solves my problem. For example,
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Some clients instead of having the standard header SOAPAction: [URL], have someting like in example above. "mymethod" represents the method in my web service class with [WebMethod] attribute on it and [URL] is the namespace of the webservice. Still the service works perfectly normal. The consumers use different frameworks (NuSOAP from PHP, .NET, Java, etc).

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I develop an asmx web service (i.e. ASP.NET 2.0). There's a piece of code that may read the contents of the HTTP request (via HttpContext.Current.Request.InputStream) while processing it. I realise that InputStream may only be read once for a request, and I make sure I never try to read it more than once.

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It 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
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Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-13,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
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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 ) {
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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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I am using C# + VSTS 2008 + .Net 3.5 + ASP.Net + IIS 7.0 + ADO.Net + SQL Server 2008. I want to develop an ASP.Net aspx page which has the following function,

1 It could accept 3 Url parameters param1, param2 and param3, and the request looks like this,

http://mysite.com/foo.aspx?parame1=abcÂm2=defÂm3=ghi

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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=abcÂm2=defÂm3=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=googleÂm2=defÂm3=ghi

Any reference samples? My question is I do not know how to implement so many functions in one aspx page.

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POST
username=aRDSe3vcaMzh06YrMcxcQw==&password=1BSvQc6lpNlnp4ufWgRLPHNJ7RMrL8CcaWCzL1Vtw+Y=&phone_number=+11234567890&trigger_id=1105&message=howdy

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I am using an Zencoder API to transcode video files. Once the job is completed they will do a HTTP POST with XML or JSON data containing the Job ID and other info to the url we provide.

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excuse me for the underlines, i thought that would make my query stand out.

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All I need is to send a http post request I pulled from fiddler.

I do not want to use HttpWebRequest class. It makes it hard to set up a request, does not allow to change host,

and when it does send it it looks nothing like the request I want. The server is very sensitive and unless I copy the request headers 100% it will return an empty page. Why can't I just type in the headers and send it that way? What would be 5 minutes of
work in php is taking the whole evening in asp.net.

This is what I am trying to send, simple as it gets: ...

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"The request failed with HTTP status 401: Unauthorized"

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I already add Networking service permissions to SSRS in Machine2, but the error continues..

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I am using an SMS Gateway to make my application receive SMSs. For this, the SMS Gateway sends a request to one of the pages in my application with the message as a querystring parameter. eg.[URL]. Now after my page gets invoked, I need to send an OK response to the SMS Gateway so that it doesn't keep retrying to send the same message to my application again and again. I cannot figure out how to send the OK response.

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How To Ignore A Http Request Without Clearing The Browser

Mar 24, 2010

To prevent duplicate requests (i.e. pressing F5 right after clicking a command button), I've setup my page base class to ignore the request if it's detected as a duplicate.

When I say 'ignore' I mean Response.End()

Now I thought I've seen this work before, where there's an issue, I just Response.End() and the users page just does nothing. I don't know the exact circumstance in which this worked, but I'm unable to repeat it now.

Now when I call Response.End(), I just get an empty browser. More specifically, I get this html.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=utf-8"></HEAD>
<BODY></BODY></HTML>

I setup the following test app to confirm the problem is not elsewhere in my app. Here it is:

Add the following to an aspx form

<asp:Label ID="lbl" Text="0" runat="server" /><br />
<asp:Button ID="btnAdd1" Text="Add 1" runat="server" /><br />
<asp:Button ID="btnAdd2" Text="Add 2" runat="server" /><br />
<asp:Button ID="btnAdd3" Text="Add 3" runat="server" /><br />

And here's the code behind file

using System;

namespace TestDupRequestCancellation
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Init(object sender, EventArgs e)
{
btnAdd1.Click += btnAdd1_Click;
btnAdd2.Click += btnAdd2_Click;
btnAdd3.Click += btnAdd3_Click;
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
CurrentValue = 0;
else if (Int32.Parse(lbl.Text) != CurrentValue)
Response.End();
}
protected void Page_PreRender(object sender, EventArgs e)
{
lbl.Text = CurrentValue.ToString();
}
protected int CurrentValue
{
get
{
return Int32.Parse(Session["CurrentValue"].ToString());
}
set
{
Session["CurrentValue"] = value.ToString();
}
}
void btnAdd3_Click(object sender, EventArgs e)
{
CurrentValue += 3;
}
void btnAdd2_Click(object sender, EventArgs e)
{
CurrentValue += 2;
}
void btnAdd1_Click(object sender, EventArgs e)
{
CurrentValue += 1;
}
}
}

When you load the page, clicking any button does what is expected, but if you press F5 at any time after pressing one of the buttons, it will detect it as a duplicate request and call Response.End() which promptly ends the task. Which leaves the user with an empty browser.

Is there anyway to leave the user with the page as it was, so they can just click a button?

Also; please note that this code is the simplest code I could come up with to demonstrate my problem. It's not meant to demonstrate how to check for dup requests.

EDIT: Another change that will allow me to achieve the same results would be to disable all my event handlers.

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C# - How To Raw Http Request That The HttpWebRequest Class Sends

Sep 27, 2010

I know you are all going to answer "use a debugging proxy server like Fiddler" but it's not that simple.

Here's my situation: I have some code that runs on a server, in an ASP.NET page code-behind (aspx.cs), which (among other things) establishes a connection to another server, grabs some stuff, and then formats it and returns it to the browser.

The problem is that the other server is doing the wrong thing, and so I want to be able to pass a debugging flag into the page (via the query string, e.g. ?debug=true) so that it will print out the completely raw HTTP request that it is sending to the other server so I can see what the heck is wrong. This code is running in several places so I want to be able to just pass in this flag on dev, staging, or production and just see the request, without having to figure out whether the production servers can talk to some proxy server that exists somewhere, etc.

You would think that it would be easy to do this, right? So I feel like I'm crazy or something but I looked at the reference for HttpWebRequest and its parent class WebRequest and -- nothing. No can do. You would think Microsoft would have thought of this. The closest thing is that you can access the "Headers" collection but when I tried it, it omitted some really important headers like "content length" -- so it must be "lying" to me (I know it's lying, because I know for a fact that the remote server is returning a 200 status -- the request is successful, it's just returning bad/different/wrong data)

Here is the asked-for code example:

HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://www.whatever.com");
req.Method = ... whatever ...;
... other setup for the request ...
/* At this point we are about to send the request.
What does the raw HTTP request look like? */
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();

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