compress-picture-js/src/service/compress/compress_jpg.service.ts

图片压缩工具

import { IOptions } from '../../util/option/option.util.js';
import { IResponse, responseUtil } from '../../util/response/response.util.js';
import { CreateDirSyncFromFilename } from '../../util/file/file.util.js';
import { ExecCommandSync } from '../../util/cmd/cmd.util.js';
import { ICode } from '../../util/response/respone_enum.util.js';
import mozjpeg from 'mozjpeg';
import { ExecFileException } from 'child_process';

// CompressJPG 压缩JPG
export function CompressJPG(options: IOptions): IResponse {
  let resp = responseUtil.DefaultIResponse();
  // console.log("🚀", options);

  // 检查输出文件夹
  CreateDirSyncFromFilename(options['output']);

  let commandArs = [
    '-quality',
    jpgCompressQuality(options['quality']),
    '-outfile',
    options['output'],
    options['input'],
  ];

  try {
    ExecCommandSync(mozjpeg, commandArs);
  } catch (e: any) {
    resp.code = ICode.FAILED;
    resp.reason = ICode[ICode.FAILED];
    let err = e as ExecFileException;
    if (err.message !== '') {
      resp.message = err.message;
      resp.metadata = err;
    } else {
      resp.message = '压缩JPG/JPEG失败：' + JSON.stringify(options);
    }
  }
  return resp;
}

// jpgCompressQuality jpg压缩质量
function jpgCompressQuality(quality: number): string {
  if (quality < 0 || quality > 100) {
    return '100';
  }
  return quality.toString();
}