Change original code to new code (without affecting the original code function but with add on codes or replacing certain parameter from the original

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Original source code:

HTML

<form action="demo.asp" method="get" target="_blank">
First name: <input type="text" name="fname"><br>Last name: <input type="text" name="lname"><br><input type="submit" value="Submit">
</form>

New source code:

HTML

<form action="demo.asp" method="get" target="_blank">
  <input type="hidden" name="csrfPreventionSalt" value="<c:out value="${csrfPreventionSalt}" xmlns:c="#unknown" />"/>
  First name: <input type="text" name="fname">
  Last name: <input type="text" name="lname">
  <input type="submit" value="Submit">
</form>

based on example above is the any way to change from the Original source code in to the new source code? the new one will add extra code like

HTML

<input type="hidden" name="csrfPreventionSalt" value="<c:out value="${csrfPreventionSalt}" xmlns:c="#unknown" />"/>

or replace the word 'get' to 'post' without affecting other part of the coding

What is it called when adding few line of extra code in to original completed code?

Posted 23-May-13 18:16pm

Member 10032346

Updated 24-May-13 3:42am

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Comments

Sunasara Imdadhusen 24-May-13 0:26am

What are you trying to achieve??

Member 10032346 24-May-13 9:13am

system that can change add on some codes to the original completed code.

TorstenH. 24-May-13 2:15am

let#s use proper tags. This is no C and no Java.

Member 10032346 24-May-13 9:14am

ok

Richard MacCutchan 24-May-13 10:28am

What is it called when adding few line of extra code in to original completed code?
Modification.

Member 10032346 25-May-13 1:35am

any available sample which i may refer?

Richard MacCutchan 25-May-13 3:45am

Sample of what? If you add new code to an existing program it changes the program. Maybe you should rephrase your question, as this does not really make much sense.

Member 10032346 25-May-13 10:13am

something like enhance the code (eg adding come extra function on it) . I just need to show that a system able to add code into the original source code and having the original and new code shown side by side. something like this http://htmlpurifier.org/demo.php

Richard MacCutchan 25-May-13 10:19am

Sorry, but I don't see what that link has to do with your question, or indeed what your question is really about. As I have said before, if you add code to existing code then what you have is something different. I really don't understand what problem you are trying to solve.

Member 10032346 26-May-13 21:49pm

I need to implement a system where on the left side is where original source code being input and right side is where the system modify and provide the new source code. The interface is some wat similar like the system in this link http://isea.nitk.ac.in/rod/csrf/saseride0.1/findformanchortags.php

the new source code is to enhance the existing code by preventing agains certain web attack. The problem now is I would like to know how they add code to existing code with programming .

Richard MacCutchan 27-May-13 3:34am

I hate to state the obvious, but you will need to write some code to read in the new statements and somehow compile them into the existing program. How you would do this is something I have never tried, so I cannot make any suggestions.

Member 10032346 27-May-13 7:49am

Is there any code which show how to read in the new statement? The system is developed for the purpose of showing as a guideline so I no need to compile and run the program after read in the new statement.

Richard MacCutchan 27-May-13 9:29am

Yes lots of code, but you first need to decide where you are going to read it from: a file, a textbox, ... ?

Member 10032346 27-May-13 13:37pm

Well I still deciding but usually will go with Textbox. Since now I have clarify that much would, I would like to know the search term for this particular system in in Internet so that I may refer. I have try the term "code modification " in Java or C# (The language I prefer is either C# or Java). So am I searching the right term?

Richard MacCutchan 28-May-13 2:57am

Sorry, but this is not something I have heard of before. Maybe something like "online compiler"?

Member 10032346 28-May-13 5:37am

But it is not compiling the code. You did mention there are lot of code available that can do it right? care to share me some links please.Thank you.

Richard MacCutchan 28-May-13 6:01am

No, I'm afraid I did not say that. I said that it is something I have not used, so you will have to do the research for yourself. And, to be honest, I am still not sure what problem you are trying to solve.

Member 10032346 28-May-13 13:20pm

Then what do you mean by your third last post? "Yes lots of code, but you first need to decide where you are going to read it from: a file, a textbox, ... ?" If i decide to use textbox then what? In your opinion which language is suitable for developing this type of system?

Richard MacCutchan 28-May-13 17:14pm

Lots of code can be found by reading the MSDN documentation, tutorials that Google can find for you, CodeProject articles etc; but you have to go and look for them.

What language is suitable? Whatever language you have skills and experience in. I cannot decide for you since I still do not really know (as I have said previously) what problem you are trying to solve. If you do not know how to write a basic Windows forms, or Web, application then you are not likely to make much progress.

2 solutions

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Member 10032346 · Answer 1 · 2013-05-28T20:41:00

Solution 1

If you don't mind would you please check on the post of the following link
http://stackoverflow.com/questions/16807052/how-to-add-modify-code-to-existing-source-code-programmatically[^]

Posted 28-May-13 20:41pm

Member 10032346

Comments

Richard MacCutchan 29-May-13 3:11am

OK, and what information is that supposed to convey?

Member 10032346 29-May-13 9:11am

Just an over all more specific description. The system need reading the code from the textbox, Reading the string to look for a newline and input specific code in that line, and show the output. Reading the string to look for a newline and input specific code in that line would be the problem. Is there material that can teach me how to Reading the string to look for a newline?

User input may be vary but the key point is that the input will have things similar like this " <form action="demo.asp" method="get" ...>";. So how can I make the system to read it and apply adding code on the back of it or modify it while having all other code remain the same.

Richard MacCutchan 29-May-13 12:43pm

If you don't know how to get the contents of a textbox and split it into separate lines, then I think maybe this project is a bit beyond your current skills. Take a look at the string class in .NET, with particular reference to its Split method. How you do the rest of it is still something that I cannot offer suggestions for.

Member 10032346 30-May-13 6:20am

Due to some reason i am forced to go with this project.
Is there any way to make the system recognise pattern like " <form action="demo.asp" method="get" ...>" ? I need it to detect the word like method="get" or form action= . The specific code might be add on after those pattern or words. It may not necessary add in the end of a line or between lines.

Richard MacCutchan 30-May-13 6:28am

Sorry, but you are still not explaining what you are trying to do. The statement "Is there any way to make the system recognise pattern like " <form action="demo.asp" method="get" ...>" ?" makes no real sense. You need to explain what platform you want to develop on, what language you are coding in, and what results you expect from this process. Up to now all you have told us is that you want to read some text and add some lines into it somewhere. But we still don't know what you expect to happen with this modified text.

Member 10032346 30-May-13 23:44pm

Expected result is just return text with the add on of some lines. The result only need to be shown and no need to compile and run. The text user input are server side language. The add on line are mostly ASP.net or PHP.

Richard MacCutchan 31-May-13 3:07am

Then it's just a simple matter of adding some extra strings into an existing string array. Hardly a difficult problem.

Member 10032346 31-May-13 7:29am

Meaning I need to firstly make the user input code in the textbox record as string array.Then the system will search for the specific word or line which I preset (declare) and adding some extra strings into an existing string array that match up the detaction and lastly return the output of result?

Richard MacCutchan 31-May-13 12:48pm

That is what I had in mind.

Member 10032346 1-Jun-13 7:37am

The part where "the system will search for the specific word or line which I preset (declare)" should be program with conditional statement right? Will IF...Else statement or switch/select/case statement be suitable for the searching specific word or line which I preset (declare)? Or is there any other appropriate method that you would suggest to perform the matching?

Richard MacCutchan 1-Jun-13 10:21am

See my message of 2 days ago which suggests looking at the string class and its methods. It contains all that you need.

Member 10032346 2-Jun-13 10:35am

Thank you for the suggestion I will do more research on string class and perform implementation.

Member 10032346 11-Jun-13 1:23am

Sorry to bother you again, after researching I try to implement the system. I still have the problem of adding extra strings into an existing string. The matching I use Regex.Match. I try with some simple code like:

User input in textbox: abcdefghi
Regex.Match(textbox, @"([A-Za-z0-9\-]+)ghi"
Expected result: abcdefHELLOghi

So which string class should I use so that before the matching of "ghi" able to add some string? I try to use String.Insert Method but the problem is I don't know the index position of the insertion. So is the String.Insert Method the right choice or is there other string class method you have in mind?

Richard MacCutchan 11-Jun-13 2:57am

I would guess the IndexOf and the Insert methods, but you really need to look at the documenation for yourself.

Member 10032346 11-Jun-13 11:15am

Thanks. Please read the new solution below because here is too long.

Member 10032346 · Answer 2 · 2013-06-11T05:15:00

Here is a sample that I tested

C#

string oritext  oritextBox.Text;
int index2 = oritet.IndexOf("of ");
string shakespeare2 = oritext.Insert(index2 + "of ".Length, "the ");

The input: The Attack of Titan
The output: The Attack of the Titan

So the output is consider what I wanted because it search the specific word "of " and add "the " behind of it. Is there a way to add in front of the "of " instead of behind? I had try using the string replace method :

string rpl = oritext.Replace("of ", "one of ");

The output: The Attack one of the Titan

Well the output works when both combine but I like to know is there a way without using the replace method.

Change original code to new code (without affecting the original code function but with add on codes or replacing certain parameter from the original

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Change original code to new code (without affecting the original code function but with add on codes or replacing certain parameter from the original

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