在 Nodejs 中使用 Unirest 将图像保存到文件

Question

我正在尝试使用 Unirest 下载图片，但保存后图片已损坏

const downloadChapterPage = async (url, pageName) => {
    return new Promise(async (resolve) => {
        unirest.get(url)
            .end(async (res) => {
                if (res.error) {
                    console.log("Error when downloading page : " + pageName, " ", res.error)
                    resolve();
                }
                fs.writeFileSync(pageName + '.jpg', res.raw_body);
                resolve();
            });
    });
}

downloadChapterPage('https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png', 'page1');

我也用这种方式起诉过，但也行不通

const downloadChapterPage = async (url, pageName) => {
    return new Promise(async (resolve) => {
        unirest.get(url)
            .end(async (res) => {
                if (res.error) {
                    console.log("Error when downloading page : " + pageName, " ", res.error)
                    resolve();
                }
                const data = Buffer.from(res.raw_body);
                fs.writeFileSync(pageName + '.jpg', data, 'binary');
                resolve();
            });
    });
}
downloadChapterPage('https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png', 'page1');

Answer 1

这个修改怎么样？

修改点：

• 我认为编码可能是您遇到问题的原因。所以请在请求中添加encoding(null)。
• 这张图片 https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png 的 mimeType 是 image/png。

修改后的脚本：

const downloadChapterPage = async (url, pageName) => {
    return new Promise(async (resolve) => {
        unirest.get(url)
            .encoding(null) // Added
            .end(async (res) => {
                if (res.error) {
                    console.log("Error when downloading page : " + pageName, " ", res.error)
                    resolve();
                }
                const data = Buffer.from(res.raw_body);
                fs.writeFileSync(pageName + '.png', data, 'binary'); // Modified or fs.writeFileSync(pageName + '.png', data);
                resolve();
            });
    });
}

参考：

• Unirest