1612613400
JPEG Encoder/Decoder for Deno based on Node’s jpeg-js.
import JPEG from "https://deno.land/x/jpeg/mod.ts";
const img = await Deno.readFile("./img.jpg");
const raw = JPEG.decode(img);
console.log(raw);
/*
{
width: 850,
height: 571,
exifBuffer: undefined,
data: Buffer(1941400) [
78, 73, 83, 255, 86, 81, 91, 255, 82, 77, 85, 255, 68, 63, 71,
255, 61, 56, 64, 255, 67, 62, 70, 255, 73, 68, 76, 255, 71, 66,
74, 255, 65, 60, 66, 255, 75, 70, 76, 255, 83, 78, 84, 255, 81,
76, 82, 255, 75, 71, 74, 255, 79, 75, 78, 255, 96, 92, 95, 255,
113, 109, 112, 255, 95, 92, 99, 255, 86, 83, 90, 255, 89, 86, 93,
255, 91, 88, 95, 255, 74, 71, 78, 255, 57, 54, 61, 255, 65, 62,
69, 255, 83, 80, 87, 255, 83, 80, 87, 255,
... 1941300 more items
]
}
*/
import JPEG from "https://deno.land/x/jpeg/mod.ts";
const width = 320, height = 180;
const frameData = new Uint8Array(width * height * 4);
let i = 0;
while(i < frameData.length) {
frameData[i++] = 255; // red
frameData[i++] = 66; // green
frameData[i++] = 159; // blue
frameData[i++] = 0; // alpha - ignored in JPEGs
}
const rawImageData = {
data: frameData,
width: width,
height: height,
};
var jpegImageData = JPEG.encode(rawImageData, 50);
console.log(jpegImageData);
Deno.writeFileSync("./test/enc.jpg", jpegImageData.data);
/*
{
data: Uint8Array(2222) [
255, 216, 255, 224, 0, 16, 74, 70, 73, 70, 0, 1, 1, 0, 0,
1, 0, 1, 0, 0, 255, 219, 0, 132, 0, 16, 11, 12, 14, 12,
10, 16, 14, 13, 14, 18, 17, 16, 19, 24, 40, 26, 24, 22, 22,
24, 49, 35, 37, 29, 40, 58, 51, 61, 60, 57, 51, 56, 55, 64,
72, 92, 78, 64, 68, 87, 69, 55, 56, 80, 109, 81, 87, 95, 98,
103, 104, 103, 62, 77, 113, 121, 112, 100, 120, 92, 101, 103, 99, 1,
17, 18, 18, 24, 21, 24, 47, 26, 26, 47,
... 2122 more items
],
width: 320,
height: 180
}
*/
Option | Description | Default |
---|---|---|
colorTransform |
Transform alternate colorspaces like YCbCr. undefined means respect the default behavior encoded in metadata. |
undefined |
useTArray |
Decode pixels into a typed Uint8Array instead of a Buffer . |
false |
formatAsRGBA |
Decode pixels into RGBA vs. RGB. | true |
tolerantDecoding |
Be more tolerant when encountering technically invalid JPEGs. | true |
maxResolutionInMP |
The maximum resolution image that jpeg should attempt to decode in megapixels. Images larger than this resolution will throw an error instead of decoding. |
100 |
maxMemoryUsageInMB |
The (approximate) maximum memory that jpeg should allocate while attempting to decode the image in mebibyte. Images requiring more memory than this will throw an error instead of decoding. |
512 |
Author: DevSnowflake
Source Code: https://github.com/DevSnowflake/jpeg
#deno #nodejs #node #javascript
1612613400
JPEG Encoder/Decoder for Deno based on Node’s jpeg-js.
import JPEG from "https://deno.land/x/jpeg/mod.ts";
const img = await Deno.readFile("./img.jpg");
const raw = JPEG.decode(img);
console.log(raw);
/*
{
width: 850,
height: 571,
exifBuffer: undefined,
data: Buffer(1941400) [
78, 73, 83, 255, 86, 81, 91, 255, 82, 77, 85, 255, 68, 63, 71,
255, 61, 56, 64, 255, 67, 62, 70, 255, 73, 68, 76, 255, 71, 66,
74, 255, 65, 60, 66, 255, 75, 70, 76, 255, 83, 78, 84, 255, 81,
76, 82, 255, 75, 71, 74, 255, 79, 75, 78, 255, 96, 92, 95, 255,
113, 109, 112, 255, 95, 92, 99, 255, 86, 83, 90, 255, 89, 86, 93,
255, 91, 88, 95, 255, 74, 71, 78, 255, 57, 54, 61, 255, 65, 62,
69, 255, 83, 80, 87, 255, 83, 80, 87, 255,
... 1941300 more items
]
}
*/
import JPEG from "https://deno.land/x/jpeg/mod.ts";
const width = 320, height = 180;
const frameData = new Uint8Array(width * height * 4);
let i = 0;
while(i < frameData.length) {
frameData[i++] = 255; // red
frameData[i++] = 66; // green
frameData[i++] = 159; // blue
frameData[i++] = 0; // alpha - ignored in JPEGs
}
const rawImageData = {
data: frameData,
width: width,
height: height,
};
var jpegImageData = JPEG.encode(rawImageData, 50);
console.log(jpegImageData);
Deno.writeFileSync("./test/enc.jpg", jpegImageData.data);
/*
{
data: Uint8Array(2222) [
255, 216, 255, 224, 0, 16, 74, 70, 73, 70, 0, 1, 1, 0, 0,
1, 0, 1, 0, 0, 255, 219, 0, 132, 0, 16, 11, 12, 14, 12,
10, 16, 14, 13, 14, 18, 17, 16, 19, 24, 40, 26, 24, 22, 22,
24, 49, 35, 37, 29, 40, 58, 51, 61, 60, 57, 51, 56, 55, 64,
72, 92, 78, 64, 68, 87, 69, 55, 56, 80, 109, 81, 87, 95, 98,
103, 104, 103, 62, 77, 113, 121, 112, 100, 120, 92, 101, 103, 99, 1,
17, 18, 18, 24, 21, 24, 47, 26, 26, 47,
... 2122 more items
],
width: 320,
height: 180
}
*/
Option | Description | Default |
---|---|---|
colorTransform |
Transform alternate colorspaces like YCbCr. undefined means respect the default behavior encoded in metadata. |
undefined |
useTArray |
Decode pixels into a typed Uint8Array instead of a Buffer . |
false |
formatAsRGBA |
Decode pixels into RGBA vs. RGB. | true |
tolerantDecoding |
Be more tolerant when encountering technically invalid JPEGs. | true |
maxResolutionInMP |
The maximum resolution image that jpeg should attempt to decode in megapixels. Images larger than this resolution will throw an error instead of decoding. |
100 |
maxMemoryUsageInMB |
The (approximate) maximum memory that jpeg should allocate while attempting to decode the image in mebibyte. Images requiring more memory than this will throw an error instead of decoding. |
512 |
Author: DevSnowflake
Source Code: https://github.com/DevSnowflake/jpeg
#deno #nodejs #node #javascript
1600755840
A pure TypeScript JPEG encoder and decoder for deno
import { decode } from "https://deno.land/x/jpeg.ts/mod.ts"
//read image data:
let raw = await Deno.readFile(fullPath)
//decode"
let result = decode(raw);
//result.width: Image width
//result.height: Image height
//result.data[0] -> Red
//result.data[1] -> Green
//result.data[2] -> Blue
//result.data[3] -> Alpha
//...
// result.data is an array of RGBa colors
Also you can access the pixel of the image:
import { decode } from "https://deno.land/x/jpeg.ts/mod.ts"
//read image data:
let raw = await Deno.readFile(fullPath)
//decode"
let result = decode(raw);
let pix = result.getPixel(12, 33); // -> { r: 0, g: 0, b: 254, a: 255 }
// result.getPixel(x, y)
//while 0 <= x < result.width and 0 <= y < result.height
import { encode, Image } from "https://deno.land/x/jpeg.ts/mod.ts"
// make image with red gree blue and alpha colors
let image: Image = {
width: 2,
height: 2,
data: new Uint8Array( [
255,0,0,1,
0,255,0,1,
0,0,255,1,
255,255,0,1,
])
}
let raw = encode(image, 100); //Quality 100 (default is 50)
//save the image
await Deno.writeFile('rgb.jpg', raw.data);
Author: fakoua
Source Code: https://github.com/fakoua/jpeg.ts
#deno #nodejs #node #javascript
1645409220
he (for “HTML entities”) is a robust HTML entity encoder/decoder written in JavaScript. It supports all standardized named character references as per HTML, handles ambiguous ampersands and other edge cases just like a browser would, has an extensive test suite, and — contrary to many other JavaScript solutions — he handles astral Unicode symbols just fine. An online demo is available.
Via npm:
npm install he
Via Bower:
bower install he
Via Component:
component install mathiasbynens/he
In a browser:
<script src="he.js"></script>
In Node.js, io.js, Narwhal, and RingoJS:
var he = require('he');
In Rhino:
load('he.js');
Using an AMD loader like RequireJS:
require(
{
'paths': {
'he': 'path/to/he'
}
},
['he'],
function(he) {
console.log(he);
}
);
he.version
A string representing the semantic version number.
he.encode(text, options)
This function takes a string of text and encodes (by default) any symbols that aren’t printable ASCII symbols and &
, <
, >
, "
, '
, and `
, replacing them with character references.
he.encode('foo © bar ≠ baz 𝌆 qux');
// → 'foo © bar ≠ baz 𝌆 qux'
As long as the input string contains allowed code points only, the return value of this function is always valid HTML. Any (invalid) code points that cannot be represented using a character reference in the input are not encoded:
he.encode('foo \0 bar');
// → 'foo \0 bar'
However, enabling the strict
option causes invalid code points to throw an exception. With strict
enabled, he.encode
either throws (if the input contains invalid code points) or returns a string of valid HTML.
The options
object is optional. It recognizes the following properties:
useNamedReferences
The default value for the useNamedReferences
option is false
. This means that encode()
will not use any named character references (e.g. ©
) in the output — hexadecimal escapes (e.g. ©
) will be used instead. Set it to true
to enable the use of named references.
Note that if compatibility with older browsers is a concern, this option should remain disabled.
// Using the global default setting (defaults to `false`):
he.encode('foo © bar ≠ baz 𝌆 qux');
// → 'foo © bar ≠ baz 𝌆 qux'
// Passing an `options` object to `encode`, to explicitly disallow named references:
he.encode('foo © bar ≠ baz 𝌆 qux', {
'useNamedReferences': false
});
// → 'foo © bar ≠ baz 𝌆 qux'
// Passing an `options` object to `encode`, to explicitly allow named references:
he.encode('foo © bar ≠ baz 𝌆 qux', {
'useNamedReferences': true
});
// → 'foo © bar ≠ baz 𝌆 qux'
decimal
The default value for the decimal
option is false
. If the option is enabled, encode
will generally use decimal escapes (e.g. ©
) rather than hexadecimal escapes (e.g. ©
). Beside of this replacement, the basic behavior remains the same when combined with other options. For example: if both options useNamedReferences
and decimal
are enabled, named references (e.g. ©
) are used over decimal escapes. HTML entities without a named reference are encoded using decimal escapes.
// Using the global default setting (defaults to `false`):
he.encode('foo © bar ≠ baz 𝌆 qux');
// → 'foo © bar ≠ baz 𝌆 qux'
// Passing an `options` object to `encode`, to explicitly disable decimal escapes:
he.encode('foo © bar ≠ baz 𝌆 qux', {
'decimal': false
});
// → 'foo © bar ≠ baz 𝌆 qux'
// Passing an `options` object to `encode`, to explicitly enable decimal escapes:
he.encode('foo © bar ≠ baz 𝌆 qux', {
'decimal': true
});
// → 'foo © bar ≠ baz 𝌆 qux'
// Passing an `options` object to `encode`, to explicitly allow named references and decimal escapes:
he.encode('foo © bar ≠ baz 𝌆 qux', {
'useNamedReferences': true,
'decimal': true
});
// → 'foo © bar ≠ baz 𝌆 qux'
encodeEverything
The default value for the encodeEverything
option is false
. This means that encode()
will not use any character references for printable ASCII symbols that don’t need escaping. Set it to true
to encode every symbol in the input string. When set to true
, this option takes precedence over allowUnsafeSymbols
(i.e. setting the latter to true
in such a case has no effect).
// Using the global default setting (defaults to `false`):
he.encode('foo © bar ≠ baz 𝌆 qux');
// → 'foo © bar ≠ baz 𝌆 qux'
// Passing an `options` object to `encode`, to explicitly encode all symbols:
he.encode('foo © bar ≠ baz 𝌆 qux', {
'encodeEverything': true
});
// → 'foo © bar ≠ baz 𝌆 qux'
// This setting can be combined with the `useNamedReferences` option:
he.encode('foo © bar ≠ baz 𝌆 qux', {
'encodeEverything': true,
'useNamedReferences': true
});
// → 'foo © bar ≠ baz 𝌆 qux'
strict
The default value for the strict
option is false
. This means that encode()
will encode any HTML text content you feed it, even if it contains any symbols that cause parse errors. To throw an error when such invalid HTML is encountered, set the strict
option to true
. This option makes it possible to use he as part of HTML parsers and HTML validators.
// Using the global default setting (defaults to `false`, i.e. error-tolerant mode):
he.encode('\x01');
// → ''
// Passing an `options` object to `encode`, to explicitly enable error-tolerant mode:
he.encode('\x01', {
'strict': false
});
// → ''
// Passing an `options` object to `encode`, to explicitly enable strict mode:
he.encode('\x01', {
'strict': true
});
// → Parse error
allowUnsafeSymbols
The default value for the allowUnsafeSymbols
option is false
. This means that characters that are unsafe for use in HTML content (&
, <
, >
, "
, '
, and `
) will be encoded. When set to true
, only non-ASCII characters will be encoded. If the encodeEverything
option is set to true
, this option will be ignored.
he.encode('foo © and & ampersand', {
'allowUnsafeSymbols': true
});
// → 'foo © and & ampersand'
encode
options globallyThe global default setting can be overridden by modifying the he.encode.options
object. This saves you from passing in an options
object for every call to encode
if you want to use the non-default setting.
// Read the global default setting:
he.encode.options.useNamedReferences;
// → `false` by default
// Override the global default setting:
he.encode.options.useNamedReferences = true;
// Using the global default setting, which is now `true`:
he.encode('foo © bar ≠ baz 𝌆 qux');
// → 'foo © bar ≠ baz 𝌆 qux'
he.decode(html, options)
This function takes a string of HTML and decodes any named and numerical character references in it using the algorithm described in section 12.2.4.69 of the HTML spec.
he.decode('foo © bar ≠ baz 𝌆 qux');
// → 'foo © bar ≠ baz 𝌆 qux'
The options
object is optional. It recognizes the following properties:
isAttributeValue
The default value for the isAttributeValue
option is false
. This means that decode()
will decode the string as if it were used in a text context in an HTML document. HTML has different rules for parsing character references in attribute values — set this option to true
to treat the input string as if it were used as an attribute value.
// Using the global default setting (defaults to `false`, i.e. HTML text context):
he.decode('foo&bar');
// → 'foo&bar'
// Passing an `options` object to `decode`, to explicitly assume an HTML text context:
he.decode('foo&bar', {
'isAttributeValue': false
});
// → 'foo&bar'
// Passing an `options` object to `decode`, to explicitly assume an HTML attribute value context:
he.decode('foo&bar', {
'isAttributeValue': true
});
// → 'foo&bar'
strict
The default value for the strict
option is false
. This means that decode()
will decode any HTML text content you feed it, even if it contains any entities that cause parse errors. To throw an error when such invalid HTML is encountered, set the strict
option to true
. This option makes it possible to use he as part of HTML parsers and HTML validators.
// Using the global default setting (defaults to `false`, i.e. error-tolerant mode):
he.decode('foo&bar');
// → 'foo&bar'
// Passing an `options` object to `decode`, to explicitly enable error-tolerant mode:
he.decode('foo&bar', {
'strict': false
});
// → 'foo&bar'
// Passing an `options` object to `decode`, to explicitly enable strict mode:
he.decode('foo&bar', {
'strict': true
});
// → Parse error
decode
options globallyThe global default settings for the decode
function can be overridden by modifying the he.decode.options
object. This saves you from passing in an options
object for every call to decode
if you want to use a non-default setting.
// Read the global default setting:
he.decode.options.isAttributeValue;
// → `false` by default
// Override the global default setting:
he.decode.options.isAttributeValue = true;
// Using the global default setting, which is now `true`:
he.decode('foo&bar');
// → 'foo&bar'
he.escape(text)
This function takes a string of text and escapes it for use in text contexts in XML or HTML documents. Only the following characters are escaped: &
, <
, >
, "
, '
, and `
.
he.escape('<img src=\'x\' onerror="prompt(1)">');
// → '<img src='x' onerror="prompt(1)">'
he.unescape(html, options)
he.unescape
is an alias for he.decode
. It takes a string of HTML and decodes any named and numerical character references in it.
he
binaryTo use the he
binary in your shell, simply install he globally using npm:
npm install -g he
After that you will be able to encode/decode HTML entities from the command line:
$ he --encode 'föo ♥ bår 𝌆 baz'
föo ♥ bår 𝌆 baz
$ he --encode --use-named-refs 'föo ♥ bår 𝌆 baz'
föo ♥ bår 𝌆 baz
$ he --decode 'föo ♥ bår 𝌆 baz'
föo ♥ bår 𝌆 baz
Read a local text file, encode it for use in an HTML text context, and save the result to a new file:
$ he --encode < foo.txt > foo-escaped.html
Or do the same with an online text file:
$ curl -sL "http://git.io/HnfEaw" | he --encode > escaped.html
Or, the opposite — read a local file containing a snippet of HTML in a text context, decode it back to plain text, and save the result to a new file:
$ he --decode < foo-escaped.html > foo.txt
Or do the same with an online HTML snippet:
$ curl -sL "http://git.io/HnfEaw" | he --decode > decoded.txt
See he --help
for the full list of options.
he has been tested in at least:
After cloning this repository, run npm install
to install the dependencies needed for he development and testing. You may want to install Istanbul globally using npm install istanbul -g
.
Once that’s done, you can run the unit tests in Node using npm test
or node tests/tests.js
. To run the tests in Rhino, Ringo, Narwhal, and web browsers as well, use grunt test
.
To generate the code coverage report, use grunt cover
.
Thanks to Simon Pieters (@zcorpan) for the many suggestions.
Author: Mathiasbynens
Source Code: https://github.com/mathiasbynens/he
License: MIT License
1633439047
A set of codecs for encode and decode data.
Supported hex alphabet and custom alphabets.
Supported Rfc, RfcHex, Crockford, ZBase, GeoHash, WordSafe, Custom alphabets
Supported Bitcoin, Flickr, Ripple, Custom alphabets
Supported Ascii85, ZeroMq, IPv6
Run this command:
With Dart:
$ dart pub add base_codecs
With Flutter:
$ flutter pub add base_codecs
This will add a line like this to your package's pubspec.yaml (and run an implicit dart pub get
):
dependencies:
base_codecs: ^1.0.0
Alternatively, your editor might support dart pub get
or flutter pub get
. Check the docs for your editor to learn more.
Now in your Dart code, you can use:
import 'package:base_codecs/base_codecs.dart';
example/base_codecs_example.dart
import 'dart:convert';
import 'dart:typed_data';
import 'package:base_codecs/base_codecs.dart';
void main() {
const testString =
"Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure.";
/// Base16 (Hex)
const data = [0xDE, 0xAD, 0xBE, 0xEF];
hexEncode(Uint8List.fromList(data)); //DEADBEEF
hexDecode('DEADBEEF'); // == data
/// Base16 Custom
const custom = Base16CodecCustom('ABCDEF9876543210');
final customData = Uint8List.fromList(
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15],
);
custom.encode(customData); // AAABACADAEAFA9A8A7A6A5A4A3A2A1A0
custom.decode('AAABACADAEAFA9A8A7A6A5A4A3A2A1A0'); // == customData
/// Base32
/// RFC
const encoded =
"JVQW4IDJOMQGI2LTORUW4Z3VNFZWQZLEFQQG433UEBXW43DZEBRHSIDINFZSA4TFMFZW63RMEBRHK5BAMJ4SA5DINFZSA43JNZTXK3DBOIQHAYLTONUW63RAMZZG63JAN52GQZLSEBQW42LNMFWHGLBAO5UGSY3IEBUXGIDBEBWHK43UEBXWMIDUNBSSA3LJNZSCYIDUNBQXIIDCPEQGCIDQMVZHGZLWMVZGC3TDMUQG6ZRAMRSWY2LHNB2CA2LOEB2GQZJAMNXW45DJNZ2WKZBAMFXGIIDJNZSGKZTBORUWOYLCNRSSAZ3FNZSXEYLUNFXW4IDPMYQGW3TPO5WGKZDHMUWCAZLYMNSWKZDTEB2GQZJAONUG64TUEB3GK2DFNVSW4Y3FEBXWMIDBNZ4SAY3BOJXGC3BAOBWGKYLTOVZGKLQ=";
base32RfcEncode(Uint8List.fromList(utf8.encode(testString)));
base32RfcDecode(encoded);
/// RFC HEX
const encodedRFCHex =
"9LGMS839ECG68QBJEHKMSPRLD5PMGPB45GG6SRRK41NMSR3P41H7I838D5PI0SJ5C5PMURHC41H7AT10C9SI0T38D5PI0SR9DPJNAR31E8G70OBJEDKMURH0CPP6UR90DTQ6GPBI41GMSQBDC5M76B10ETK6IOR841KN683141M7ASRK41NMC83KD1II0RB9DPI2O83KD1GN8832F4G6283GCLP76PBMCLP62RJ3CKG6UPH0CHIMOQB7D1Q20QBE41Q6GP90CDNMST39DPQMAP10C5N68839DPI6APJ1EHKMEOB2DHII0PR5DPIN4OBKD5NMS83FCOG6MRJFETM6AP37CKM20PBOCDIMAP3J41Q6GP90EDK6USJK41R6AQ35DLIMSOR541NMC831DPSI0OR1E9N62R10E1M6AOBJELP6ABG=";
base32RfcHexEncode(Uint8List.fromList(utf8.encode(testString)));
base32RfcHexDecode(encodedRFCHex);
/// ZBase
const encodedZbase =
"JIOSHEDJQCOGE4MUQTWSH35IPF3SO3MRFOOGH55WRBZSH5D3RBT81EDEPF31YHUFCF3S65TCRBT8K7BYCJH1Y7DEPF31YH5JP3UZK5DBQEO8YAMUQPWS65TYC33G65JYP74GO3M1RBOSH4MPCFS8GMBYQ7WG1A5ERBWZGEDBRBS8KH5WRBZSCEDWPB11Y5MJP31NAEDWPBOZEEDNXROGNEDOCI38G3MSCI3GN5UDCWOG63TYCT1SA4M8PB4NY4MQRB4GO3JYCPZSH7DJP34SK3BYCFZGEEDJP31GK3UBQTWSQAMNPT11Y35FP31ZRAMWPFZSHEDXCAOGS5UXQ7SGK3D8CWSNY3MACP1SK3DURB4GO3JYQPWG6HUWRB5GK4DFPI1SHA5FRBZSCEDBP3H1YA5BQJZGN5BYQBSGKAMUQI3GKMO";
base32ZBaseEncode(Uint8List.fromList(utf8.encode(testString)));
base32ZBaseDecode(encodedZbase);
const encodedCrockford =
"9NGPW839ECG68TBKEHMPWSVND5SPGSB45GG6WVVM41QPWV3S41H7J838D5SJ0WK5C5SPYVHC41H7AX10C9WJ0X38D5SJ0WV9DSKQAV31E8G70RBKEDMPYVH0CSS6YV90DXT6GSBJ41GPWTBDC5P76B10EXM6JRV841MQ683141P7AWVM41QPC83MD1JJ0VB9DSJ2R83MD1GQ8832F4G6283GCNS76SBPCNS62VK3CMG6YSH0CHJPRTB7D1T20TBE41T6GS90CDQPWX39DSTPAS10C5Q68839DSJ6ASK1EHMPERB2DHJJ0SV5DSJQ4RBMD5QPW83FCRG6PVKFEXP6AS37CMP20SBRCDJPAS3K41T6GS90EDM6YWKM41V6AT35DNJPWRV541QPC831DSWJ0RV1E9Q62V10E1P6ARBKENS6ABG";
base32CrockfordEncode(Uint8List.fromList(utf8.encode(testString)));
base32CrockfordDecode(encodedCrockford);
/// WordSafe
const encodedWordSafe =
"FfRgrC5FPJR8CpHXPVcgrmqfM7mgRmH67RR8rqqc63hgrq5m63V9WC5CM7mW2rX7J7mgwqVJ63V9Gv32JFrW2v5CM7mW2rqFMmXhGq53PCR92jHXPMcgwqV2Jmm8wqF2Mvp8RmHW63RgrpHMJ7g98H32Pvc8WjqC63ch8C5363g9Grqc63hgJC5cM3WW2qHFMmW4jC5cM3RhCC54Q6R84C5RJfm98mHgJfm84qX5JcR8wmV2JVWgjpH9M3p42pHP63p8RmF2JMhgrv5FMmpgGm32J7h8CC5FMmW8GmX3PVcgPjH4MVWW2mq7MmWh6jHcM7hgrC5QJjR8gqXQPvg8Gm59Jcg42mHjJMWgGm5X63p8RmF2PMc8wrXc63q8Gp57MfWgrjq763hgJC53MmrW2jq3PFh84q32P3g8GjHXPfm8GHR";
base32WordSafeEncode(Uint8List.fromList(utf8.encode(testString)));
base32WordSafeDecode(encodedWordSafe);
/// GeoHash
const encodedGeoHash =
"9phqw839fdh68ucmfjnqwtvpe5tqhtc45hh6wvvn41rqwv3t41j7k838e5tk0wm5d5tqyvjd41j7bx10d9wk0x38e5tk0wv9etmrbv31f8h70scmfenqyvj0dtt6yv90exu6htck41hqwuced5q76c10fxn6ksv841nr683141q7bwvn41rqd83ne1kk0vc9etk2s83ne1hr8832g4h6283hdpt76tcqdpt62vm3dnh6ytj0djkqsuc7e1u20ucf41u6ht90derqwx39etuqbt10d5r68839etk6btm1fjnqfsc2ejkk0tv5etkr4scne5rqw83gdsh6qvmgfxq6bt37dnq20tcsdekqbt3m41u6ht90fen6ywmn41v6bu35epkqwsv541rqd831etwk0sv1f9r62v10f1q6bscmfpt6bch";
base32GeoHashEncode(Uint8List.fromList(utf8.encode(testString)));
base32GeoHashDecode(encodedGeoHash);
///Custom'
const codec = Base32CodecCustom("0123456789ABCDEFGHJKMNPQRSTVWXYZ", '');
const encodedCustom =
"9NGPW839ECG68TBKEHMPWSVND5SPGSB45GG6WVVM41QPWV3S41H7J838D5SJ0WK5C5SPYVHC41H7AX10C9WJ0X38D5SJ0WV9DSKQAV31E8G70RBKEDMPYVH0CSS6YV90DXT6GSBJ41GPWTBDC5P76B10EXM6JRV841MQ683141P7AWVM41QPC83MD1JJ0VB9DSJ2R83MD1GQ8832F4G6283GCNS76SBPCNS62VK3CMG6YSH0CHJPRTB7D1T20TBE41T6GS90CDQPWX39DSTPAS10C5Q68839DSJ6ASK1EHMPERB2DHJJ0SV5DSJQ4RBMD5QPW83FCRG6PVKFEXP6AS37CMP20SBRCDJPAS3K41T6GS90EDM6YWKM41V6AT35DNJPWRV541QPC831DSWJ0RV1E9Q62V10E1P6ARBKENS6ABG";
codec.encode(Uint8List.fromList(utf8.encode(testString)));
codec.decode(encodedCustom);
/// Base58
const encodedBitcoin =
"2KG5obUH7D2G2qLPjujWXdCd1FK6heTdfCjVn1MwP3unVrwcoTz3QyxtBe8Dpxfc5Afnf6VL2b4Ae9RWHEJ957WJpTXTXKcSyFZb17ALWU1BcBsNv2Cncqm5qTadzLcryeftfjtFZfJ14EKKf7UVd5h7UXFSqpmB144w2Eyb9gwvh7mofZpc7oSQv4ZSso9tD1589EjLERTebQoFtt8isgKarX4HGRWUpQCRkAPWuiNrYeV4XEmE4ez4f2mWN1vgGPcX8mKm7RXjYnQ1aGF3oZvKrQQ1ySEq4b5fLvQxcGzCp9xsVdfgK3pXC1RQPf8nyhik8JEnGdXV999wjaj7ggrcEtmkZH41ynpvSYkDecL8nNMT";
base58BitcoinEncode(Uint8List.fromList(utf8.encode(testString)));
base58BitcoinDecode(encodedBitcoin);
/// Flickr
const encodedFlickr =
'2jg5NAth7d2g2QkoJUJvwCcC1fj6GDsCEcJuM1mWo3UMuRWBNsZ3pYXTbD8dPXEB5aEME6uk2A4aD9qvhei957viPswswjBrYfyA17akvt1bBbSnV2cMBQL5QszCZkBRYDETEJTfyEi14ejjE7tuC5G7twfrQPLb144W2eYA9FWVG7LNEyPB7NrpV4yrSN9Td1589eJkeqsDApNfTT8HSFjzRw4hgqvtPpcqKaovUHnRxDu4weLe4DZ4E2Lvn1VFgoBw8LjL7qwJxMp1zgf3NyVjRpp1YreQ4A5EkVpXBgZcP9XSuCEFj3Pwc1qpoE8MYGHK8ieMgCwu999WJzJ7FFRBeTLKyh41YMPVrxKdDBk8Mnms';
base58FlickrEncode(Uint8List.fromList(utf8.encode(testString)));
base58FlickrDecode(encodedFlickr);
/// Ripple
const encodedRipple =
'pKGnob7HfDpGpqLPjujWXdUdrEKa6eTdCUjV8rMAPsu8ViAcoTzsQyxtBe3DFxCcnwC8CaVLpbhwe9RWHNJ9nfWJFTXTXKcSyEZbrfwLW7rBcB14vpU8cqmnqT2dzLciyeCtCjtEZCJrhNKKCf7Vdn6f7XESqFmBrhhApNyb9gAv6fmoCZFcfoSQvhZS1o9tDrn39NjLNRTebQoEtt351gK2iXhHGRW7FQURkwPWu54iYeVhXNmNhezhCpmW4rvgGPcX3mKmfRXjY8Qr2GEsoZvKiQQrySNqhbnCLvQxcGzUF9x1VdCgKsFXUrRQPC38y65k3JN8GdXV999Aj2jfggicNtmkZHhry8FvSYkDecL384MT';
base58RippleEncode(Uint8List.fromList(utf8.encode(testString)));
base58RippleDecode(encodedRipple);
/// Base58Check
const encodedCheck = "5Kd3NBUAdUnhyzenEwVLy9pBKxSwXvE9FMPyR4UKZvpe6E3AgLr";
const decodedCheck =
"80EDDBDC1168F1DAEADBD3E44C1E3F8F5A284C2029F78AD26AF98583A499DE5B19";
base58CheckEncode(base16.decode(decodedCheck));
base16.encode(base58CheckDecode(encodedCheck));
///Base85
/// Ascii
final zeroDecoded = Uint8List.fromList(
[0, 0, 0, 0, 0, 0, 0, 0, 0xd9, 0x47, 0xa3, 0xd5, 0, 0, 0, 0],
);
base85AsciiEncode(Uint8List.fromList(utf8.encode(testString)));
base85AsciiEncode(zeroDecoded);
/// Z85
const rfcTestData = [0x86, 0x4F, 0xD2, 0x6F, 0xB5, 0x59, 0xF7, 0x5B];
const rfcTestDataEncoded = "HelloWorld";
base85ZEncode(
Uint8List.fromList(rfcTestData),
);
base85ZDecode(rfcTestDataEncoded);
/// IPv6
// 1080:0:0:0:8:800:200C:417A from RFC 1924
const address = '108000000000000000080800200C417A';
const encodedIPv6 = "4)+k&C#VzJ4br>0wv%Yp";
base85IPv6Encode(
Uint8List.fromList(base16.decode(address)),
);
base85IPv6Decode(encodedIPv6);
}
Download Details:
Author: KirsApps
Source Code: https://github.com/KirsApps/base_codecs
1594815386
Uniform Resource Locator or URL is used as the address of a document on the web. It can be composed of words, typically the Domain Name Server(DNS), or IP address. For example, https://data-flair.training/blogs/ is a URL.
The structure of this URL is as follows-
scheme://prefix.domain:port/path/filename
Here:
Scheme – Defines the internet service type, commonly http or https.
Prefix – Defines the domain prefix, www.
Domain – It defines the domain name of the internet, data-flair.training
Port – Defines the host’s port number, 80 is the default port number for http.
Path – Defines the path at the server.
Filename – It defines the name of the file or the document that is being displayed.
Some common URL schemes are-
URL encoding is the practice of translating characters within URL to ASCII so that they can be easily transmitted and get accepted by all the browsers present globally on the internet. The non-ASCII characters are shown with a percentage sign (%) followed by hexadecimal digits.
Hence, URL encoding basically involves replacing a character that does not start with ‘%’ followed by hexadecimal digits to the ASCII character set. For example, if you want to type a space in the URL, you write it as %20. $ is replaced by %24.
#html tutorials #html encoded characters #html url encode #url encoded