1 | const {Base64} = require("./base64");
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2 |
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3 |
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4 | function byte2hexStr(byte) {
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5 | var hexByteMap = "0123456789ABCDEF";
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6 | var str = "";
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7 | str += hexByteMap.charAt(byte >> 4);
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8 | str += hexByteMap.charAt(byte & 0x0f);
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9 | return str;
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10 | }
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11 |
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12 |
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13 |
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14 |
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15 |
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16 |
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17 |
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18 | function bytesToString(arr) {
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19 | if (typeof arr === 'string') {
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20 | return arr;
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21 | }
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22 | let str = '',
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23 | _arr = arr;
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24 | for (let i = 0; i < _arr.length; i++) {
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25 | let one = _arr[i].toString(2), v = one.match(/^1+?(?=0)/);
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26 | if (v && one.length === 8) {
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27 | let bytesLength = v[0].length;
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28 | let store = _arr[i].toString(2).slice(7 - bytesLength);
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29 | for (let st = 1; st < bytesLength; st++) {
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30 | store += _arr[st + i].toString(2).slice(2);
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31 | }
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32 | str += String.fromCharCode(parseInt(store, 2));
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33 | i += bytesLength - 1;
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34 | } else {
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35 | str += String.fromCharCode(_arr[i]);
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36 | }
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37 | }
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38 | return str;
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39 | };
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40 |
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41 |
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42 |
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43 |
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44 |
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45 |
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46 |
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47 | function hextoString(hex) {
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48 | let arr = hex.split("");
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49 | let out = "";
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50 | for (let i = 0; i < arr.length / 2; i++) {
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51 | let tmp = "0x" + arr[i * 2] + arr[i * 2 + 1];
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52 | out += String.fromCharCode(tmp);
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53 | }
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54 | return out;
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55 | }
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56 |
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57 | function base64DecodeFromString(string64) {
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58 | return new Base64().decodeToByteArray(string64);
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59 | }
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60 |
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61 |
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62 | function byteArray2hexStr(byteArray) {
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63 | let str = "";
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64 | for (let i = 0; i < (byteArray.length); i++) {
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65 | str += byte2hexStr(byteArray[i]);
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66 | }
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67 | return str;
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68 | }
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69 |
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70 |
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71 | module.exports = {
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72 | byteArray2hexStr,
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73 | hextoString,
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74 | base64DecodeFromString,
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75 | bytesToString,
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76 | byte2hexStr
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77 | };
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