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desigens/decode.js

Last active February 7, 2019 08:49
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Revisions

  1. desigens renamed this gist Feb 7, 2019. 1 changed file with 2 additions and 2 deletions.
    4 changes: 2 additions & 2 deletions gistfile1.txt → decode.js
    View file
    Original file line number Diff line number Diff line change
    @@ -1,9 +1,9 @@
    /**
    * Decode string "Москва" (ISO-8859-1) to utf-8 one
    * Decode string "Москва" (ISO-8859-1) to "Москва" (UTF-8)
    * @param {string} input
    * @returns {string}
    */
    export function decodeHttpHeader(input) {
    export function decodeISO88591toUTF8(input) {
    let string = '';
    let i = 0;
    let currentChar = 0;
  2. desigens created this gist Feb 7, 2019.
    37 changes: 37 additions & 0 deletions gistfile1.txt
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,37 @@
    /**
    * Decode string "Москва" (ISO-8859-1) to utf-8 one
    * @param {string} input
    * @returns {string}
    */
    export function decodeHttpHeader(input) {
    let string = '';
    let i = 0;
    let currentChar = 0;
    let nextChar = 0;
    let nextCharPlus = 0;

    while (i < input.length) {
    currentChar = input.charCodeAt(i);

    if (currentChar < 128) {
    string += String.fromCharCode(currentChar);
    i++;
    } else if (currentChar > 191 && currentChar < 224) {
    nextChar = input.charCodeAt(i + 1);
    string += String.fromCharCode(
    ((currentChar & 31) << 6) | (nextChar & 63)
    );
    i += 2;
    } else {
    nextChar = input.charCodeAt(i + 1);
    nextCharPlus = input.charCodeAt(i + 2);
    string += String.fromCharCode(
    ((currentChar & 15) << 12) |
    ((nextChar & 63) << 6) |
    (nextCharPlus & 63)
    );
    i += 3;
    }
    }
    return string;
    }