Solved

HTTP Post to external website form

Posted on 2008-10-08
8
2,211 Views
Last Modified: 2009-07-29
Hi

I am busy doing investigation into HTTP Posts to other websites. I found the code below which is used for posting HTTP Data to another website form.

My question is simply:
Does this process actually trigger a Form Submit action on the external website??

Thanks
(Please note the code is just a copy from another post simply to indicate what is happening and has not been tested - the question is more theoretical)
///////////////////////////////////////////////////////////////////////////////////////////

ASCIIEncoding encoding =new ASCIIEncoding();
 

string postData  ="p1=" + "FP98";

postData +="p2="  + ordertime;

postData +="p3="  + "Shop";
 
 

byte[]  data = encoding.GetBytes(postData);
 

// Prepare web request...

HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("https://www.aaa.com/vvonline/ccform.asp");

myRequest.Method      = "POST";

myRequest.ContentType = "application/x-www-form-urlencoded";

myRequest.ContentLength = data.Length;

Stream newStream=myRequest.GetRequestStream();

// Send the data.

newStream.Write(data,0,data.Length);

newStream.Close();

Open in new window

0
Comment
Question by:djcheeky
  • 4
  • 3
8 Comments
 
LVL 2

Expert Comment

by:schalcraft
ID: 22668100
In theory, yes, submitting forms to a remote site does work. However, if the remote site doesnt want to allow this, then they wil have taken steps to ensure it cant be done.
0
 

Author Comment

by:djcheeky
ID: 22668130
Thanks - but what I'm asking is will the code above actually trigger a Form submit action with the data provided on the remote site?
0
 
LVL 8

Expert Comment

by:MatthiasVance
ID: 22668229
You mean like the javascript onSubmit event?
No it doesn't get fired.

Kind regards,

Matthias Vance
0
 

Author Comment

by:djcheeky
ID: 22668287
Hi again, Let me elaborate:

The code above creates an HTTP FORM request and sends it to a remote website.

What I would like to know is whether this request that is passed via the code below is the same as someone submitting a form with the same data on the remote website?

Thanks


newStream.Write(data,0,data.Length);

Open in new window

0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 8

Expert Comment

by:MatthiasVance
ID: 22668801
No it's not the same. You are only posting the data that you specify in your program. A form on a website might contain hidden fields etc.

Kind regards,

Matthias Vance
0
 

Author Comment

by:djcheeky
ID: 22668923
Yes, but if the form on the remote site is expeecting form items:
* name
* surname
* age

And I run the code executed below, passing the name,surname and age via the HTTP post request, does that yield the same result as if I had typed in those value into the HTTP form on the remote site and submitted?

Please read what I have written and try to understand it.
Thanks
string postData  ="name=John";

postData +="surname=Smith";

postData +="age=30";

 

 

byte[]  data = encoding.GetBytes(postData);

 

// Prepare web request...

HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("https://www.aaa.com/vvonline/ccform.asp");

myRequest.Method      = "POST";

myRequest.ContentType = "application/x-www-form-urlencoded";

myRequest.ContentLength = data.Length;

Stream newStream=myRequest.GetRequestStream();

// Send the data.

newStream.Write(data,0,data.Length);

newStream.Close();

Open in new window

0
 
LVL 8

Accepted Solution

by:
MatthiasVance earned 50 total points
ID: 22669320
Yes, it would do exactly the same.
However, you need to change your code in order for it to work correctly.

Kind regards,

Matthias Vance
' Wrong code

string postData  ="name=John";

postData +="surname=Smith";

postData +="age=30";
 

' Right code

string postData = "name=John";

postData += "&surname=Smith";

postData += "&age=30";

Open in new window

0
 

Author Comment

by:djcheeky
ID: 22676094
Aah - ok thanks - Yeah - I grabbed the code from somewhere else and I suspected it may not be perfect :)
Just wanted to know whether they yield the same effect, which they do, so thanks :)
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A quick way to get a menu to work on our website, is using the Menu control and assign it to a web.sitemap using SiteMapDataSource. Example of web.sitemap file: (CODE) Sample code to add to the page menu: (CODE) Running the application, we wi…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

25 Experts available now in Live!

Get 1:1 Help Now