1 |
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2 |
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3 |
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4 | 'use strict';
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5 |
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6 | const Base = require('./LogStore');
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7 |
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8 | module.exports = class FileLogStore extends Base {
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9 |
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10 | static parseFilename (name) {
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11 | if (typeof name !== 'string') {
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12 | return null;
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13 | }
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14 | name = FileHelper.getBasename(name);
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15 | const index = name.lastIndexOf('-');
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16 | return index !== -1
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17 | ? [name.substring(0, index), name.substring(index + 1)]
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18 | : [name];
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19 | }
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20 |
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21 | constructor (config) {
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22 | super({
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23 | basePath: 'log',
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24 | observePeriod: 30,
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25 | maxFileSize: 2,
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26 | maxFiles: 1,
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27 | ...config
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28 | });
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29 | this.basePath = this.module.resolvePath(this.basePath);
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30 | this.file = this.getFile();
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31 | this.fullFile = this.getFile('full');
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32 | this.maxFileSize *= 1024 * 1024;
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33 |
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34 | fs.mkdirSync(this.basePath, {recursive: true});
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35 | this.openFile();
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36 | }
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37 |
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38 | init () {
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39 | if (this.observePeriod) {
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40 | this.observe();
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41 | }
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42 | }
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43 |
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44 | getFile (suffix) {
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45 | return path.join(this.basePath, this.name + (suffix ? `-${suffix}` : '') +'.log');
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46 | }
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47 |
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48 | openFile () {
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49 | this._fd = fs.openSync(this.file, 'a');
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50 | }
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51 |
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52 | save () {
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53 | fs.write(this._fd, this.format(...arguments), err => {
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54 | if (err) {
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55 | console.error(this.wrapClassMessage(`save`), err);
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56 | }
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57 | });
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58 | }
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59 |
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60 | format (type, text, data) {
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61 | if (text instanceof Exception) {
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62 | text = text.toString();
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63 | } else if (text instanceof Error) {
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64 | text = `${text.message} ${text.stack}`;
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65 | }
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66 | text = `${new Date().toISOString()} ${type.toUpperCase()} ${text}`;
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67 | if (data) {
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68 | text = `${text} ${data}`;
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69 | }
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70 | return text + os.EOL;
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71 | }
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72 |
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73 | observe () {
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74 | setTimeout(async () => {
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75 | await this.checkout();
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76 | this.observe();
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77 | }, this.observePeriod * 1000);
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78 | }
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79 |
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80 | async checkout () {
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81 | try {
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82 | const {size} = await PromiseHelper.promise(fs.fstat.bind(fs, this._fd));
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83 | if (size > this.maxFileSize) {
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84 | await this.rotate();
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85 | }
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86 | } catch (err) {
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87 | this.log('error', this.wrapClassMessage('checkout'), err);
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88 | }
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89 | }
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90 |
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91 | async rotate () {
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92 | await fs.promises.rename(this.file, this.fullFile);
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93 | fs.closeSync(this._fd);
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94 | this.openFile();
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95 | const files = await this.getSortedFiles();
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96 | await this.deleteExcessFiles(files);
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97 | for (let i = files.length - 1; i >= 0; --i) {
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98 | await fs.promises.rename(files[i], this.getFile(i + 1));
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99 | }
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100 | this.log('info', `Rotate success: ${this.name}`);
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101 | }
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102 |
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103 | async deleteExcessFiles (files) {
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104 | if (files.length > this.maxFiles) {
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105 | const unlinks = files.splice(this.maxFiles, files.length);
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106 | for (const file of unlinks) {
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107 | await fs.promises.unlink(file);
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108 | }
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109 | }
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110 | }
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111 |
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112 | async getSortedFiles () {
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113 | const baseName = path.basename(this.file);
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114 | const items = [];
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115 | for (let name of await fs.promises.readdir(this.basePath)) {
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116 | if (name.indexOf(this.name) === 0 && name !== baseName) {
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117 | const file = path.join(this.basePath, name);
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118 | const stat = await fs.promises.stat(file);
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119 | const time = stat.mtime.getTime();
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120 | if (stat.isFile()) {
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121 | items.push({file, time});
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122 | }
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123 | }
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124 | }
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125 | return items.sort((a, b) => b.time - a.time).map(item => item.file);
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126 | }
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127 |
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128 | async getFiles () {
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129 | const items = [];
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130 | for (let name of await fs.promises.readdir(this.basePath)) {
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131 | if (name.indexOf(this.name) === 0) {
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132 | const file = path.join(this.basePath, name);
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133 | const stat = await fs.promises.stat(file);
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134 | if (stat.isFile()) {
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135 | items.push({name, file, stat});
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136 | }
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137 | }
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138 | }
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139 | return items;
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140 | }
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141 | };
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142 |
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143 | const fs = require('fs');
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144 | const os = require('os');
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145 | const path = require('path');
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146 | const Exception = require('../error/Exception');
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147 | const FileHelper = require('../helper/FileHelper');
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148 | const PromiseHelper = require('../helper/PromiseHelper'); |
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