使用 node.js 从 URL 读取图像

如何解决使用 node.js 从 URL 读取图像

请原谅我对 node 的无知。

我需要通过 url 读取图像并通过sharp调整其大小。

目前我是这样阅读本地的。

例如。 我想阅读这张图片 url="https://miami.pfsrealty.com/wp-content/uploads/2020/02/Miami-y-su-bahia-con-nubes-al-atardecer-Compressed.jpg"

我当前的代码是这样的。

return new Promise(async (resolve,reject) => { const fileSystem = require('fs');

        const image = fileSystem.readFileSync(directoryPath,'base64');
          const sharp =  require('sharp');
          const height: number = parseInt(heightString);//parameter
          const width: number = parseInt(widthString);//parameter
            let img = new Buffer(image,'base64');
            await sharp(img)
                .resize(height,width)
                .toBuffer()
                .then(resizedImageBuffer => {
                    const resizedImageData = resizedImageBuffer.toString('base64');
                    resolve(resizedImageData);
                })
                .catch(error => {
                    // error handeling
                    reject(error);
                });
        });

应该如何调用？ 谢谢！

解决方法

试试这个

const sharp = require('sharp');
const fs = require('fs');

function readAndSave(url,width = 300,height = 300) {

    const filename = url.replace(/^.*[\\\/]/,'');

    require('axios').get(url,{ responseType: 'arraybuffer' })
        .then((response) => {
            return Buffer.from(response.data,"utf-8")
        }).then((buffer) => {
            return new Promise((resolve,reject) => {
                sharp(buffer)
                    .resize(height,width)
                    .toBuffer()
                    .then(resizedImageBuffer => {
                        const resizedImageData = resizedImageBuffer.toString('base64');

                        const buf = Buffer.from(resizedImageData,'base64');

                        fs.writeFile(`./${filename}`,buf,function (err) {
                            if (err) throw err;
                        });
                        resolve()
                    })
                    .catch(error => {
                        // error handeling
                        reject(error);
                    });
            })

        }).catch(error => {
            console.log('error',error)
        });





}

readAndSave('https://miami.pfsrealty.com/wp-content/uploads/2020/02/Miami-y-su-bahia-con-nubes-al-atardecer-Compressed.jpg');