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https://github.com/rdch106/simple-rfc1738-encoder

Simple URL Encoder and Decoder according to RFC 1738
https://github.com/rdch106/simple-rfc1738-encoder

ascii-table iso-8859 javascript online-demo rfc-1738 url-encoder utf-8

Last synced: about 2 months ago
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Simple URL Encoder and Decoder according to RFC 1738

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# Simple-RFC1738-Encoder



[![Codacy Badge](https://api.codacy.com/project/badge/Grade/668cece8833a446e9238438a5913b1d3)](https://www.codacy.com/app/RDCH106/Simple-RFC1738-Encoder?utm_source=github.com&utm_medium=referral&utm_content=RDCH106/Simple-RFC1738-Encoder&utm_campaign=Badge_Grade)



Simple URL Encoder and Decoder according to [RFC 1738](https://www.ietf.org/html/rfc1738.txt) with support to use [UTF-8](https://tools.ietf.org/html/rfc3629) codification.



* [RFC 1738 TXT version](https://www.ietf.org/rfc/rfc1738.txt)

* [UTF-8 (RFC3629) TXT version](https://www.ietf.org/rfc/rfc3629.txt)



Standard URL encoding steps:



* Convert the character string into a sequence of bytes using the UTF-8 encoding

* Convert each byte that is not an ASCII letter or digit to %HH, where HH is the hexadecimal value of the byte



The term URL encoding is a bit inexact because the encoding procedure is not limited to URLs ([Uniform Resource Locators](Codificación UTF-8)), but can also be applied to any other URIs ([Uniform Resource Identifiers](https://en.wikipedia.org/wiki/Uniform_Resource_Identifier)) such as URNs ([Uniform Resource Names](https://en.wikipedia.org/wiki/Uniform_Resource_Name))



When Simple-RFC1738-Encoder works with UTF-8 enconding is like the function [encodeURI](http://www.w3schools.com/jsref/jsref_encodeuri.asp) in JavaScript, but it is posible encode using other codifications like [ISO-8859](https://en.wikipedia.org/wiki/ISO/IEC_8859) not forcing UTF-8 enconding, very useful if you work with latin characters.



Try it: [Online Demo](https://raw.githack.com/RDCH106/Simple-RFC1738-Encoder/master/demo.html)



Available version for Python using an experimental wrapper: https://github.com/RDCH106/pySRE



## URL Encoding Explained



##### Why do I need URL encoding?

The URL specification RFC 1738 specifies that only a small set of characters can be used in a URL. Those characters are:



- A to Z (ABCDEFGHIJKLMNOPQRSTUVWXYZ)

- a to z (abcdefghijklmnopqrstuvwxyz)

- 0 to 9 (0123456789)

- `$` (Dollar Sign)

- `-` (Hyphen / Dash)

- `_` (Underscore)

- `.` (Period)

- `+` (Plus sign)

- `!` (Exclamation / Bang)

- `*` (Asterisk / Star)

- `'` (Single Quote)

- `(` (Open Bracket)

- `)` (Closing Bracket)



##### How does URL encoding work?

All offending characters are replaced by a % and a two digit hexadecimal value that represents the character in the proper ISO character set. Here are a couple of examples:



- `$` (Dollar Sign) becomes %24

- `&` (Ampersand) becomes %26

- `+`(Plus) becomes %2B

- `,` (Comma) becomes %2C

- `:` (Colon) becomes %3A

- `;` (Semi-Colon) becomes %3B

- `=` (Equals) becomes %3D

- `?` (Question Mark) becomes %3F

- `@` (Commercial A / At) becomes %40



### ASCII Table



![ASCII Table](img/asciifull.gif "ASCII Table and Description")



### ASCII Code - The extended ASCII table



#### ASCII control characters (character code 0-31)

The first 32 characters in the ASCII-table are unprintable control codes and are used to control peripherals such as printers.



|DEC|OCT|HEX|BIN|Symbol|HTML Number|HTML Name|Description|

|--- |--- |--- |--- |--- |--- |--- |--- |

|0|000|00|00000000|NUL|``||Null char|

|1|001|01|00000001|SOH|``||Start of Heading|

|2|002|02|00000010|STX|``||Start of Text|

|3|003|03|00000011|ETX|``||End of Text|

|4|004|04|00000100|EOT|``||End of Transmission|

|5|005|05|00000101|ENQ|``||Enquiry|

|6|006|06|00000110|ACK|``||Acknowledgment|

|7|007|07|00000111|BEL|``||Bell|

|8|010|08|00001000|BS|``||Back Space|

|9|011|09|00001001|HT|`	`||Horizontal Tab|

|10|012|0A|00001010|LF|`

`||Line Feed|

|11|013|0B|00001011|VT|``||Vertical Tab|

|12|014|0C|00001100|FF|``||Form Feed|

|13|015|0D|00001101|CR|`

`||Carriage Return|

|14|016|0E|00001110|SO|``||Shift Out / X-On|

|15|017|0F|00001111|SI|``||Shift In / X-Off|

|16|020|10|00010000|DLE|``||Data Line Escape|

|17|021|11|00010001|DC1|``||Device Control 1 (oft. XON)|

|18|022|12|00010010|DC2|``||Device Control 2|

|19|023|13|00010011|DC3|``||Device Control 3 (oft. XOFF)|

|20|024|14|00010100|DC4|``||Device Control 4|

|21|025|15|00010101|NAK|``||Negative Acknowledgement|

|22|026|16|00010110|SYN|``||Synchronous Idle|

|23|027|17|00010111|ETB|``||End of Transmit Block|

|24|030|18|00011000|CAN|``||Cancel|

|25|031|19|00011001|EM|``||End of Medium|

|26|032|1A|00011010|SUB|``||Substitute|

|27|033|1B|00011011|ESC|``||Escape|

|28|034|1C|00011100|FS|``||File Separator|

|29|035|1D|00011101|GS|``||Group Separator|

|30|036|1E|00011110|RS|``||Record Separator|

|31|037|1F|00011111|US|``||Unit Separator|



#### ASCII printable characters (character code 32-127)

Codes 32-127 are common for all the different variations of the ASCII table, they are called printable characters, represent letters, digits, punctuation marks, and a few miscellaneous symbols. You will find almost every character on your keyboard. Character 127 represents the command DEL.



|DEC|OCT|HEX|BIN|Symbol|HTML Number|HTML Name|Description|

|--- |--- |--- |--- |--- |--- |--- |--- |

|32|040|20|00100000| |` `||Space|

|33|041|21|00100001|!|`!`||Exclamation mark|

|34|042|22|00100010|"|`"`|`"`|Double quotes (or speech marks)|

|35|043|23|00100011|#|`#`||Number|

|36|044|24|00100100|$|`$`||Dollar|

|37|045|25|00100101|%|`%`||Procenttecken|

|38|046|26|00100110|&|`&`|`&`|Ampersand|

|39|047|27|00100111|'|`'`||Single quote|

|40|050|28|00101000|(|`(`||Open parenthesis (or open bracket)|

|41|051|29|00101001|)|`)`||Close parenthesis (or close bracket)|

|42|052|2A|00101010| * |`*`||Asterisk|

|43|053|2B|00101011|+|`+`||Plus|

|44|054|2C|00101100|,|`,`||Comma|

|45|055|2D|00101101|-|`-`||Hyphen|

|46|056|2E|00101110|.|`.`||Period, dot or full stop|

|47|057|2F|00101111|/|`/`||Slash or divide|

|48|060|30|00110000|0|`0`||Zero|

|49|061|31|00110001|1|`1`||One|

|50|062|32|00110010|2|`2`||Two|

|51|063|33|00110011|3|`3`||Three|

|52|064|34|00110100|4|`4`||Four|

|53|065|35|00110101|5|`5`||Five|

|54|066|36|00110110|6|`6`||Six|

|55|067|37|00110111|7|`7`||Seven|

|56|070|38|00111000|8|`8`||Eight|

|57|071|39|00111001|9|`9`||Nine|

|58|072|3A|00111010|:|`:`||Colon|

|59|073|3B|00111011|;|`;`||Semicolon|

|60|074|3C|00111100|<|`<`|`<`|Less than (or open angled bracket)|

|61|075|3D|00111101|=|`=`||Equals|

|62|076|3E|00111110|>|`>`|`>`|Greater than (or close angled bracket)|

|63|077|3F|00111111|?|`?`||Question mark|

|64|100|40|01000000|@|`@`||At symbol|

|65|101|41|01000001|A|`A`||Uppercase A|

|66|102|42|01000010|B|`B`||Uppercase B|

|67|103|43|01000011|C|`C`||Uppercase C|

|68|104|44|01000100|D|`D`||Uppercase D|

|69|105|45|01000101|E|`E`||Uppercase E|

|70|106|46|01000110|F|`F`||Uppercase F|

|71|107|47|01000111|G|`G`||Uppercase G|

|72|110|48|01001000|H|`H`||Uppercase H|

|73|111|49|01001001|I|`I`||Uppercase I|

|74|112|4A|01001010|J|`J`||Uppercase J|

|75|113|4B|01001011|K|`K`||Uppercase K|

|76|114|4C|01001100|L|`L`||Uppercase L|

|77|115|4D|01001101|M|`M`||Uppercase M|

|78|116|4E|01001110|N|`N`||Uppercase N|

|79|117|4F|01001111|O|`O`||Uppercase O|

|80|120|50|01010000|P|`P`||Uppercase P|

|81|121|51|01010001|Q|`Q`||Uppercase Q|

|82|122|52|01010010|R|`R`||Uppercase R|

|83|123|53|01010011|S|`S`||Uppercase S|

|84|124|54|01010100|T|`T`||Uppercase T|

|85|125|55|01010101|U|`U`||Uppercase U|

|86|126|56|01010110|V|`V`||Uppercase V|

|87|127|57|01010111|W|`W`||Uppercase W|

|88|130|58|01011000|X|`X`||Uppercase X|

|89|131|59|01011001|Y|`Y`||Uppercase Y|

|90|132|5A|01011010|Z|`Z`||Uppercase Z|

|91|133|5B|01011011|[|`[`||Opening bracket|

|92|134|5C|01011100| \ |`\`||Backslash|

|93|135|5D|01011101|]|`]`||Closing bracket|

|94|136|5E|01011110|^|`^`||Caret - circumflex|

|95|137|5F|01011111| _ |`_`||Underscore|

|96|140|60|01100000|``` ` ```|```||Grave accent|

|97|141|61|01100001|a|`a`||Lowercase a|

|98|142|62|01100010|b|`b`||Lowercase b|

|99|143|63|01100011|c|`c`||Lowercase c|

|100|144|64|01100100|d|`d`||Lowercase d|

|101|145|65|01100101|e|`e`||Lowercase e|

|102|146|66|01100110|f|`f`||Lowercase f|

|103|147|67|01100111|g|`g`||Lowercase g|

|104|150|68|01101000|h|`h`||Lowercase h|

|105|151|69|01101001|i|`i`||Lowercase i|

|106|152|6A|01101010|j|`j`||Lowercase j|

|107|153|6B|01101011|k|`k`||Lowercase k|

|108|154|6C|01101100|l|`l`||Lowercase l|

|109|155|6D|01101101|m|`m`||Lowercase m|

|110|156|6E|01101110|n|`n`||Lowercase n|

|111|157|6F|01101111|o|`o`||Lowercase o|

|112|160|70|01110000|p|`p`||Lowercase p|

|113|161|71|01110001|q|`q`||Lowercase q|

|114|162|72|01110010|r|`r`||Lowercase r|

|115|163|73|01110011|s|`s`||Lowercase s|

|116|164|74|01110100|t|`t`||Lowercase t|

|117|165|75|01110101|u|`u`||Lowercase u|

|118|166|76|01110110|v|`v`||Lowercase v|

|119|167|77|01110111|w|`w`||Lowercase w|

|120|170|78|01111000|x|`x`||Lowercase x|

|121|171|79|01111001|y|`y`||Lowercase y|

|122|172|7A|01111010|z|`z`||Lowercase z|

|123|173|7B|01111011|{|`{`||Opening brace|

|124|174|7C|01111100|\||`|`||Vertical bar|

|125|175|7D|01111101|}|`}`||Closing brace|

|126|176|7E|01111110|~|`~`||Equivalency sign - tilde|

|127|177|7F|01111111||``||Delete|



**Note**: You can use *ALT + code_number* keyboard shortcut to print the characters. 



**Example**: *ALT+97* is "*a*" character



#### The extended ASCII codes (character code 128-255)

There are several different variations of the 8-bit ASCII table. The table below is according to ISO 8859-1, also called ISO Latin-1. Codes 128-159 contain the Microsoft® Windows Latin-1 extended characters.



|DEC|OCT|HEX|BIN|Symbol|HTML Number|HTML Name|Description|

|--- |--- |--- |--- |--- |--- |--- |--- |

|128|200|80|10000000|€|`€`|`€`|Euro sign|

|129|201|81|10000001|||||

|130|202|82|10000010|‚|`‚`|`‚`|Single low-9 quotation mark|

|131|203|83|10000011|ƒ|`ƒ`|`ƒ`|Latin small letter f with hook|

|132|204|84|10000100|„|`„`|`„`|Double low-9 quotation mark|

|133|205|85|10000101|…|`…`|`…`|Horizontal ellipsis|

|134|206|86|10000110|†|`†`|`†`|Dagger|

|135|207|87|10000111|‡|`‡`|`‡`|Double dagger|

|136|210|88|10001000|ˆ|`ˆ`|`ˆ`|Modifier letter circumflex accent|

|137|211|89|10001001|‰|`‰`|`‰`|Per mille sign|

|138|212|8A|10001010|Š|`Š`|`Š`|Latin capital letter S with caron|

|139|213|8B|10001011|‹|`‹`|`‹`|Single left-pointing angle quotation|

|140|214|8C|10001100|Œ|`Œ`|`Œ`|Latin capital ligature OE|

|141|215|8D|10001101|||||

|142|216|8E|10001110|Ž|`Ž`||Latin captial letter Z with caron|

|143|217|8F|10001111|||||

|144|220|90|10010000|||||

|145|221|91|10010001|‘|`‘`|`‘`|Left single quotation mark|

|146|222|92|10010010|’|`’`|`’`|Right single quotation mark|

|147|223|93|10010011|“|`“`|`“`|Left double quotation mark|

|148|224|94|10010100|”|`”`|`”`|Right double quotation mark|

|149|225|95|10010101|•|`•`|`•`|Bullet|

|150|226|96|10010110|–|`–`|`–`|En dash|

|151|227|97|10010111|—|`—`|`—`|Em dash|

|152|230|98|10011000|˜|`˜`|`˜`|Small tilde|

|153|231|99|10011001|™|`™`|`™`|Trade mark sign|

|154|232|9A|10011010|š|`š`|`š`|Latin small letter S with caron|

|155|233|9B|10011011|›|`›`|`›`|Single right-pointing angle quotation mark|

|156|234|9C|10011100|œ|`œ`|`œ`|Latin small ligature oe|

|157|235|9D|10011101|||||

|158|236|9E|10011110|ž|`ž`||Latin small letter z with caron|

|159|237|9F|10011111|Ÿ|`Ÿ`|`Ÿ`|Latin capital letter Y with diaeresis|

|160|240|A0|10100000||` `|` `|Non-breaking space|

|161|241|A1|10100001|¡|`¡`|`¡`|Inverted exclamation mark|

|162|242|A2|10100010|¢|`¢`|`¢`|Cent sign|

|163|243|A3|10100011|£|`£`|`£`|Pound sign|

|164|244|A4|10100100|¤|`¤`|`¤`|Currency sign|

|165|245|A5|10100101|¥|`¥`|`¥`|Yen sign|

|166|246|A6|10100110|¦|`¦`|`¦`|Pipe, Broken vertical bar|

|167|247|A7|10100111|§|`§`|`§`|Section sign|

|168|250|A8|10101000|¨|`¨`|`¨`|Spacing diaeresis - umlaut|

|169|251|A9|10101001|©|`©`|`©`|Copyright sign|

|170|252|AA|10101010|ª|`ª`|`ª`|Feminine ordinal indicator|

|171|253|AB|10101011|«|`«`|`«`|Left double angle quotes|

|172|254|AC|10101100|¬|`¬`|`¬`|Not sign|

|173|255|AD|10101101|­|`­`|`­`|Soft hyphen|

|174|256|AE|10101110|®|`®`|`®`|Registered trade mark sign|

|175|257|AF|10101111|¯|`¯`|`¯`|Spacing macron - overline|

|176|260|B0|10110000|°|`°`|`°`|Degree sign|

|177|261|B1|10110001|±|`±`|`±`|Plus-or-minus sign|

|178|262|B2|10110010|²|`²`|`²`|Superscript two - squared|

|179|263|B3|10110011|³|`³`|`³`|Superscript three - cubed|

|180|264|B4|10110100|´|`´`|`´`|Acute accent - spacing acute|

|181|265|B5|10110101|µ|`µ`|`µ`|Micro sign|

|182|266|B6|10110110|¶|`¶`|`¶`|Pilcrow sign - paragraph sign|

|183|267|B7|10110111|·|`·`|`·`|Middle dot - Georgian comma|

|184|270|B8|10111000|¸|`¸`|`¸`|Spacing cedilla|

|185|271|B9|10111001|¹|`¹`|`¹`|Superscript one|

|186|272|BA|10111010|º|`º`|`º`|Masculine ordinal indicator|

|187|273|BB|10111011|»|`»`|`»`|Right double angle quotes|

|188|274|BC|10111100|¼|`¼`|`¼`|Fraction one quarter|

|189|275|BD|10111101|½|`½`|`½`|Fraction one half|

|190|276|BE|10111110|¾|`¾`|`¾`|Fraction three quarters|

|191|277|BF|10111111|¿|`¿`|`¿`|Inverted question mark|

|192|300|C0|11000000|À|`À`|`À`|Latin capital letter A with grave|

|193|301|C1|11000001|Á|`Á`|`Á`|Latin capital letter A with acute|

|194|302|C2|11000010|Â|`Â`|`Â`|Latin capital letter A with circumflex|

|195|303|C3|11000011|Ã|`Ã`|`Ã`|Latin capital letter A with tilde|

|196|304|C4|11000100|Ä|`Ä`|`Ä`|Latin capital letter A with diaeresis|

|197|305|C5|11000101|Å|`Å`|`Å`|Latin capital letter A with ring above|

|198|306|C6|11000110|Æ|`Æ`|`Æ`|Latin capital letter AE|

|199|307|C7|11000111|Ç|`Ç`|`Ç`|Latin capital letter C with cedilla|

|200|310|C8|11001000|È|`È`|`È`|Latin capital letter E with grave|

|201|311|C9|11001001|É|`É`|`É`|Latin capital letter E with acute|

|202|312|CA|11001010|Ê|`Ê`|`Ê`|Latin capital letter E with circumflex|

|203|313|CB|11001011|Ë|`Ë`|`Ë`|Latin capital letter E with diaeresis|

|204|314|CC|11001100|Ì|`Ì`|`Ì`|Latin capital letter I with grave|

|205|315|CD|11001101|Í|`Í`|`Í`|Latin capital letter I with acute|

|206|316|CE|11001110|Î|`Î`|`Î`|Latin capital letter I with circumflex|

|207|317|CF|11001111|Ï|`Ï`|`Ï`|Latin capital letter I with diaeresis|

|208|320|D0|11010000|Ð|`Ð`|`Ð`|Latin capital letter ETH|

|209|321|D1|11010001|Ñ|`Ñ`|`Ñ`|Latin capital letter N with tilde|

|210|322|D2|11010010|Ò|`Ò`|`Ò`|Latin capital letter O with grave|

|211|323|D3|11010011|Ó|`Ó`|`Ó`|Latin capital letter O with acute|

|212|324|D4|11010100|Ô|`Ô`|`Ô`|Latin capital letter O with circumflex|

|213|325|D5|11010101|Õ|`Õ`|`Õ`|Latin capital letter O with tilde|

|214|326|D6|11010110|Ö|`Ö`|`Ö`|Latin capital letter O with diaeresis|

|215|327|D7|11010111|×|`×`|`×`|Multiplication sign|

|216|330|D8|11011000|Ø|`Ø`|`Ø`|Latin capital letter O with slash|

|217|331|D9|11011001|Ù|`Ù`|`Ù`|Latin capital letter U with grave|

|218|332|DA|11011010|Ú|`Ú`|`Ú`|Latin capital letter U with acute|

|219|333|DB|11011011|Û|`Û`|`Û`|Latin capital letter U with circumflex|

|220|334|DC|11011100|Ü|`Ü`|`Ü`|Latin capital letter U with diaeresis|

|221|335|DD|11011101|Ý|`Ý`|`Ý`|Latin capital letter Y with acute|

|222|336|DE|11011110|Þ|`Þ`|`Þ`|Latin capital letter THORN|

|223|337|DF|11011111|ß|`ß`|`ß`|Latin small letter sharp s - ess-zed|

|224|340|E0|11100000|à|`à`|`à`|Latin small letter a with grave|

|225|341|E1|11100001|á|`á`|`á`|Latin small letter a with acute|

|226|342|E2|11100010|â|`â`|`â`|Latin small letter a with circumflex|

|227|343|E3|11100011|ã|`ã`|`ã`|Latin small letter a with tilde|

|228|344|E4|11100100|ä|`ä`|`ä`|Latin small letter a with diaeresis|

|229|345|E5|11100101|å|`å`|`å`|Latin small letter a with ring above|

|230|346|E6|11100110|æ|`æ`|`æ`|Latin small letter ae|

|231|347|E7|11100111|ç|`ç`|`ç`|Latin small letter c with cedilla|

|232|350|E8|11101000|è|`è`|`è`|Latin small letter e with grave|

|233|351|E9|11101001|é|`é`|`é`|Latin small letter e with acute|

|234|352|EA|11101010|ê|`ê`|`ê`|Latin small letter e with circumflex|

|235|353|EB|11101011|ë|`ë`|`ë`|Latin small letter e with diaeresis|

|236|354|EC|11101100|ì|`ì`|`ì`|Latin small letter i with grave|

|237|355|ED|11101101|í|`í`|`í`|Latin small letter i with acute|

|238|356|EE|11101110|î|`î`|`î`|Latin small letter i with circumflex|

|239|357|EF|11101111|ï|`ï`|`ï`|Latin small letter i with diaeresis|

|240|360|F0|11110000|ð|`ð`|`ð`|Latin small letter eth|

|241|361|F1|11110001|ñ|`ñ`|`ñ`|Latin small letter n with tilde|

|242|362|F2|11110010|ò|`ò`|`ò`|Latin small letter o with grave|

|243|363|F3|11110011|ó|`ó`|`ó`|Latin small letter o with acute|

|244|364|F4|11110100|ô|`ô`|`ô`|Latin small letter o with circumflex|

|245|365|F5|11110101|õ|`õ`|`õ`|Latin small letter o with tilde|

|246|366|F6|11110110|ö|`ö`|`ö`|Latin small letter o with diaeresis|

|247|367|F7|11110111|÷|`÷`|`÷`|Division sign|

|248|370|F8|11111000|ø|`ø`|`ø`|Latin small letter o with slash|

|249|371|F9|11111001|ù|`ù`|`ù`|Latin small letter u with grave|

|250|372|FA|11111010|ú|`ú`|`ú`|Latin small letter u with acute|

|251|373|FB|11111011|û|`û`|`û`|Latin small letter u with circumflex|

|252|374|FC|11111100|ü|`ü`|`ü`|Latin small letter u with diaeresis|

|253|375|FD|11111101|ý|`ý`|`ý`|Latin small letter y with acute|

|254|376|FE|11111110|þ|`þ`|`þ`|Latin small letter thorn|

|255|377|FF|11111111|ÿ|`ÿ`|`ÿ`|Latin small letter y with diaeresis|



**Note**: You can use *ALT + 0 + code_number* keyboard shortcut to print the characters. 



**Example**: *ALT+0128* is "*€*" character



Markdown Tables generated with help of [markdownTables online tool](http://markdowntables.mrvautin.com/)