How to resolve the algorithm URL decoding step by step in the Tcl programming language

Published on 12 May 2024 09:40 PM
#Tcl

How to resolve the algorithm URL decoding step by step in the Tcl programming language

Table of Contents

Problem Statement

This task   (the reverse of   URL encoding   and distinct from   URL parser)   is to provide a function or mechanism to convert an URL-encoded string into its original unencoded form.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm URL decoding step by step in the Tcl programming language

Source code in the tcl programming language

proc urlDecode {str} {
    set specialMap {"[" "%5B" "]" "%5D"}
    set seqRE {%([0-9a-fA-F]{2})}
    set replacement {[format "%c" [scan "\1" "%2x"]]}
    set modStr [regsub -all $seqRE [string map $specialMap $str] $replacement]
    return [encoding convertfrom utf-8 [subst -nobackslash -novariable $modStr]]
}


puts [urlDecode "http%3A%2F%2Ffoo%20bar%2F"]

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