encoding HTTP request characters & > " < ' &amp; &gt; &quot; &lt; &apos; %22%27%3C%3E%26

Encoded request for """Test msg AMP GT QUOT \r &>"\r"""

POST /test HTTP/1.1
content-type: application/x-www-form-urlencoded
Host: test:8080
Content-Length: 133
various_params=whatever&text=Test+msg+AMP+GT+QUOT+%c3%96r+%26%3e%22%c3%96rHTTP/1.1 200 OK

https://www.url-encode-decode.com/

TEST AMP GT QUOT SLASHR & > " \r
TEST+AMP+GT+QUOT+SLASHR+%26+%3E+%22+%5Cr%0D%0A

INPUT:

TEST AMP GT QUOT SLASHR & > " \r
TEST+AMP+GT+QUOT+SLASHR+%26+%3E+%22+%5Cr%0D%0A
0:    (  2  <  F  P  Z  d   n   x
1:    )  3  =  G  Q  [  e   o   y
2:    *  4  >  H  R  \  f   p   z
3: !  +  5  ?  I  S  ]  g   q   {
4: "  ,  6  @  J  T  ^  h   r   |
5: #  -  7  A  K  U  _  i   s   }
6: $  .  8  B  L  V  `  j   t   ~
7: %  /  9  C  M  W  a  k   u  DEL
8: &  0  :  D  N  X  b  l   v
9: ´  1  ;  E  O  Y  c  m   w

HTTP request encoded OUTPUT:

TEST+AMP+GT+QUOT+SLASHR+%26+%3E+%22+%5Cr%0D%0A
TEST%2BAMP%2BGT%2BQUOT%2BSLASHR%2B%2526%2B%253E%2B%2522%2B%255Cr%250D%250A%0D%0A
0%3A++++%28++2++%3C++F++P++Z++d+++n+++x%0D%0A
1%3A++++%29++3++%3D++G++Q++%5B++e+++o+++y%0D%0A
2%3A++++%2A++4++%3E++H++R++%5C++f+++p+++z%0D%0A
3%3A+%21++%2B++5++%3F++I++S++%5D++g+++q+++%7B%0D%0A
4%3A+%22++%2C++6++%40++J++T++%5E++h+++r+++%7C%0D%0A
5%3A+%23++-++7++A++K++U++_++i+++s+++%7D%0D%0A
6%3A+%24++.++8++B++L++V++%60++j+++t+++%7E%0D%0A
7%3A+%25++%2F++9++C++M++W++a++k+++u++DEL%0D%0A
8%3A+%26++0++%3A++D++N++X++b++l+++v%0D%0A
9%3A+%C2%B4++1++%3B++E++O++Y++c++m+++w%0D%0A

TABLE: (with SPACE chars stripped)

0%3A        %28 2   %3C F P Z   d n x    %0D%0A
1%3A        %29 3   %3D G Q %5B e o y    %0D%0A
2%3A +      %2A 4   %3E H R %5C f p z    %0D%0A
3%3A %21    %2B 5   %3F I S %5D g q %7B  %0D%0A
4%3A %22    %2C 6   %40 J T %5E h r %7C  %0D%0A
5%3A %23    -   7   A   K U _   i s %7D  %0D%0A
6%3A %24    .   8   B   L V %60 j t %7E  %0D%0A
7%3A %25    %2F 9   C   M W a   k u DEL  %0D%0A
8%3A %26    0   %3A D   N X b   l v      %0D%0A
9%3A %C2%B4 1   %3B E   O Y c   m w      %0D%0A

Encoding of SPACE is + or %20. 

Encoding of ' ? %27 or %C2%B4 ?
The ' char from man ascii was not '! But ´. Interesting.
Encoding of ' is %27.

https://www.w3schools.com/charsets/ref_html_ascii.asp

https://stackoverflow.com/questions/1091945/what-characters-do-i-need-to-escape-in-xml-documents

XML escape characters

There are only five:

"   &quot;  %22

'   &apos;  %27

<   &lt;  %3C

>   &gt; %3E

&   &amp; %26

All 5 special characters must not be escaped in comments or CDATA sections or XML processing instructions.

https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references

http://xml.silmaril.ie/specials.html XML FAQ special chars

ASCII table from man ascii linux

  30 40 50 60 70 80 90 100 110 120

 ---------------------------------

0:    (  2  <  F  P  Z  d   n   x

1:    )  3  =  G  Q  [  e   o   y

2:    *  4  >  H  R  \  f   p   z

3: !  +  5  ?  I  S  ]  g   q   {

4: "  ,  6  @  J  T  ^  h   r   |

5: #  -  7  A  K  U  _  i   s   }

6: $  .  8  B  L  V  `  j   t   ~

7: %  /  9  C  M  W  a  k   u  DEL

8: &  0  :  D  N  X  b  l   v

9: ´  1  ;  E  O  Y  c  m   w