NodeJs将图片进行压缩生成缩略图

首先需要导入包sharp和@img/sharp-win32-x64

npm install sharp

将其封装

const thumbnailImg = (filePath) => {
  const imgPath = path.join(__dirname, filePath);
  const output = `/icons/img.webp`;
  const ThumbnailSizeLimit = 40;
  return new Promise((resolve, reject) => {
    if (fs.existsSync(output)) {
      resolve(output)
    } else {
      sharp(imgPath).metadata().then((metadata) => {
        // 得到宽高比
        let aspectRatio = metadata.width / metadata.height;
        // 读取原始图片
        sharp(imgPath).resize(Math.floor(ThumbnailSizeLimit * aspectRatio), ThumbnailSizeLimit).toFile(output, (err, info) => {
          if (err) {
            console.error(err);
            reject(err);
          } else { resolve(output) }
        });
      })
    }
  });
};

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然后导入使用

// 导入 sharp 包
const sharp = require("sharp");
// 生成缩略图
router.get('/thum', async (req, res, next) => {
  const query = req.query;
    let url = await thumbnailImg(`img.png`);
    res.json({ code: 200, data: url, message: "操作成功！" });
  } catch (error) {
    console.log(error);
    res.json({ code: 500, message: "发生未知错误" });
  }

});

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#NodeJs

上次更新: 2024/01/30, 00:35:17

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