Decode Escaped Characters in Url

Decode escaped characters in URL

Using urllib package (import urllib) :

Python 2.7

From official documentation :

urllib.unquote(string)

Replace %xx escapes by their single-character equivalent.

Example: unquote('/%7Econnolly/') yields '/~connolly/'.

Python 3

From official documentation :

urllib.parse.unquote(string, encoding='utf-8', errors='replace')

[…]

Example: unquote('/El%20Ni%C3%B1o/') yields '/El Niño/'.

Decode a url and store to a string with special characters

System.Net.WebUtility.UrlDecode works with .Net 4 Client profiles only
string value_string = Uri.UnescapeDataString(e.Url.Query); wil work for .net 4 applications

Encode / decode URLs

You can do all the URL encoding you want with the net/url module. It doesn't break out the individual encoding functions for the parts of the URL, you have to let it construct the whole URL. Having had a squint at the source code I think it does a very good and standards compliant job.

Here is an example (playground link)

package main

import (
    "fmt"
    "net/url"
)

func main() {

    Url, err := url.Parse("http://www.example.com")
    if err != nil {
        panic("boom")
    }

    Url.Path += "/some/path/or/other_with_funny_characters?_or_not/"
    parameters := url.Values{}
    parameters.Add("hello", "42")
    parameters.Add("hello", "54")
    parameters.Add("vegetable", "potato")
    Url.RawQuery = parameters.Encode()

    fmt.Printf("Encoded URL is %q\n", Url.String())
}

Which prints-

Encoded URL is "http://www.example.com/some/path/or/other_with_funny_characters%3F_or_not/?vegetable=potato&hello=42&hello=54"

URL decode special characters - äåö

The string is Latin1 encoded

NSString *string = @"f%F6rv%E5nad";
NSString *result =  [string stringByReplacingPercentEscapesUsingEncoding:NSISOLatin1StringEncoding];
NSLog(@"%@", result); // förvånad

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