denoflate

例: PlantUML online serverにファイルを送ってsvgへのリンクを受け取る

code:sh

deno run --allow-net https://scrapbox.io/api/code/deno-ja/denoflate/index.ts https://scrapbox.io/api/code/deno-ja/denoflate/sample.pu

# http://www.plantuml.com/plantuml/svg/0J80pVz2Rs8jFa5iQMDb83eWQ6LiR6yAGMnfOsKjFa9lOY0w8EQNfUQShEYgdkE1f-E1Yk-zYm00

code:index.ts

import { deflate } from "https://deno.land/x/denoflate@1.1/mod.ts";

import { encode64 } from "./encoder.ts";

import { textToBuffer } from "./converter.ts";

const res = await fetch(Deno.args0);

const text = await res.text();

console.log(http://www.plantuml.com/plantuml/svg/${encode64(deflate(textToBuffer(text), 9))});

code:converter.ts

export function textToBuffer(text: string) {

const ascii_string = unescape(encodeURIComponent(text)); // 間にこれを噛まさないと文字化けする

let buffer = new Uint8Array(ascii_string.length);

for (let i = 0; i < ascii_string.length; i++) {

bufferi = ascii_string.charCodeAt(i);

}

return buffer;

}

code:sample.pu

Bob->Alice : hello

Alice->Bob : 日本語でおｋ

from http://plantuml.sourceforge.net/codejavascript2.html

code:encoder.ts

export function encode64(data: Uint8Array) {

let r = '';

for (let i = 0; i < data.length; i += 3) {

if (i + 2 === data.length) {

r += append3bytes(datai, datai + 1, 0);

} else if (i + 1 === data.length) {

r += append3bytes(datai, 0, 0);

} else {

r += append3bytes(datai, datai + 1, datai + 2);

}

return r;

}

function encode6bit(b: number) {

if (b < 10) return String.fromCharCode(48 + b);

b -= 10;

if (b < 26) return String.fromCharCode(65 + b);

b -= 26;

if (b < 26) return String.fromCharCode(97 + b);

b -= 26;

if (b === 0) return '-';

if (b === 1) return '_';

return '?';

}

function append3bytes(b1: number, b2: number, b3: number) {

const c1 = b1 >> 2;

const c2 = ((b1 & 0x3) << 4) | (b2 >> 4);

const c3 = ((b2 & 0xF) << 2) | (b3 >> 6);

const c4 = b3 & 0x3F;

return encode6bit(c1 & 0x3F)

+ encode6bit(c2 & 0x3F)

+ encode6bit(c3 & 0x3F)

+ encode6bit(c4 & 0x3F);

}