Online URL Encoder

I have an application which I've developed for a friend. It sends a POST request to the VB forum software and logs someone in (with out setting cookies or anything).

Once the user is logged in I create a variable that creates a path on their local machine.

c:\tempfolder\date\username

The problem is that some usernames are throwing "Illegal chars" exception. For example if my username was mas|fenix it would throw an exception..

Path.Combine( _        Environment.GetFolderPath(System.Environment.SpecialFolder.CommonApplicationData), _  DateTime.Now.ToString("ddMMyyhhmm") + "-" + form1.username)

I don't want to remove it from the string, but a folder with their username is created through FTP on a server. And this leads to my second question. If I am creating a folder on the server can I leave the "illegal chars" in? I only ask this because the server is Linux based, and I am not sure if Linux accepts it or not..

EDIT: It seems that URL encode is NOT what I want.. Here's what I want to do:

old username = mas|fenixnew username = mas%xxfenix

Where %xx is the ASCII value or any other value that would easily identify the character.

I have a case like i need to add a string in between a url.

I have a url like xyz.com/broadcast-images/233.jpg and i want to rewrite the url as xyz.com/1200/600/233.jpg.

How can i do it purely in the reactjs based code?

I am trying to invoke a REST API for which i have to pass on body parameters as well.The content-type to be passed is

application/x-www-form-urlencoded

Two suggestions i got from my colleagues is either by sending as a query string in outputlocalenvironment or via BLOB in output root. I have been unable to do by either one. Anyone can tell how can i send out the body parameters properly

Does anyone know of any good C++ code that does this?

when I try to share this link on LinkedIn http://www.happiestminds.com/Insights/chatbots/
Why LinkedIn fetching Wrong title, wrong link and wrong image when shared something.