在node.js上调整图像大小

Question

我想保存图像后调整大小，所以使用夏普包，但不要小图像size.Iadded等待夏普(uploadImage.name).resize(600,600)；行保存文件夹后，我错过了什么？

const path = require('path');
const fs = require('fs');
const AdminBro = require('admin-bro');
const sharp=require('sharp');

/** @type {AdminBro.After<AdminBro.ActionResponse>} */
const after = async (response, request, context) => {
  const { record, uploadImage } = context;

  if (record.isValid() && uploadImage) {
   // console.log(uploadImage.name);
   await sharp(uploadImage.name).resize(600, 600);
 
    const filePath = path.join('uploads', record.id().toString(), uploadImage.name);
    await fs.promises.mkdir(path.dirname(filePath), { recursive: true });

    await fs.promises.rename(uploadImage.path, filePath);

    await record.update({ imagePath: `/${filePath}` });
  }
  return response;
};

/** @type {AdminBro.Before} */
const before = async (request, context) => {
  if (request.method === 'post') {
    const { uploadImage, ...otherParams } = request.payload;

    // eslint-disable-next-line no-param-reassign
    context.uploadImage = uploadImage;

    return {
      ...request,
      payload: otherParams,
    };
  }
  return request;
};

module.exports = { after, before };

const filePath = path.join('uploads', record.id().toString(), uploadImage.name); 
    await fs.promises.mkdir(path.dirname(filePath), { recursive: true });
    await sharp(uploadImage.path).withMetadata().resize(600,600).toFile(filePath);//here added correct paths but now although it saved image, doesnt reduce imageSize

Answer 1

您没有将处理后的图像写入文件。

假设这是您的存储路径：

const outputPath = __dirname + `/../storage/myImage.jpeg`;

您可以将该路径提供给sharp

await sharp('path/of/originalImage').withMetadata().resize(600, 600).toFile(outputPath);

我强烈建议你使用withMetaData()，否则你会丢失你的图片metaData