what is sent to the server when you click on a submit button

  • Thread starter Thread starter Tony Johansson
  • Start date Start date
T

Tony Johansson

Hello!

When you click on a submit button I assume the following is sent to the
server.
What exactly is sent to the server when you click on a submit button
I know that the view state is sent containint the current state of all the
control

//Tony
 
When you click on a submit button I assume the following is sent to the
server.
What exactly is sent to the server when you click on a submit button
I know that the view state is sent containint the current state of all the
control
Click to expand...

It sends:
- URL
- various info (like browser used)
- form fields
- view state

There are plenty of tools around that can sniff both request and
response. If you use one you would be able to check.

Arne
 
In "Tony Johansson"


Submit button of what application, exactly?


What server, exactly?
Click to expand...

The mentioning of viewstate make me guess at browser - ASP.NET
web app.

Arne
 
It sends:
- URL
- various info (like browser used)
- form fields
- view state

There are plenty of tools around that can sniff both request and
response. If you use one you would be able to check.
Click to expand...

Example.

Simple page:

<html>
<head>
<title>Form demo</title>
<script language="C#" runat="server">
void Page_Load(Object sender, EventArgs e)
{
if(!IsPostBack)
{
tb.Text = "";
}
}
void btn_Click(object sender, EventArgs e)
{
}
</script>
</head>
<body>
<form runat="server">
Some text: <asp:textbox id="tb" runat="server"/>
<br>
<asp:button id="btn" text="Submit" onclick="btn_Click" runat="server"/>
</form>
</body>
</html>

First GET request:

GET /formdemo.aspx HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101
Firefox/5.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Connection: keep-alive

Second POST request:

POST /formdemo.aspx HTTP/1.1
Host: localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101
Firefox/5.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Connection: keep-alive
Referer: http://localhost:8080/formdemo.aspx
Content-Type: application/x-www-form-urlencoded
Content-Length: 165

__VIEWSTATE=%2FwEPDwUJNjk3ODAzNzMzZGTGgdCdhujGcPRe8naUKHrXap8fHQ%3D%3D&__EVENTVALIDATION=%2FwEWAwKFt8r5AgLM76LvDAKSoqqWDyB3Vl2DgjYPcVJeTUbyzaBocTIP&tb=ABC&btn=Submit

Arne
 
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