使用 multer 和 gcloud 上传文件时未设置目的地

Question

我正在尝试上传我 google 存储桶中特定文件夹中的文件。我使用 Google documentations

编写代码

app.js

const multerMid = multer({
    storage: multer.memoryStorage(),
    limits: {
        // no larger than 5mb.
    fileSize: 5 * 1024 * 1024,
},
});

app.disable("x-powered-by");
app.use(
    multerMid.fields([
        { name: "avatar", maxCount: 1 },
        { name: "gallery", maxCount: 8 },
    ])
);
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

app.post("/uploads", async (req, res, next) => {
    try {
        const myFile = req.files;
        console.log(myFile);
        const imageUrl = await uploadImage(myFile.gallery[0]);
        res.status(200).json({
            message: "Upload was successful",
            data: imageUrl,
        });
    } catch (error) {
        next(error);
    }
});

上传图片功能

const uploadImage = (file) =>
new Promise((resolve, reject) => {
    const { originalname, buffer } = file;

    const blob = bucket.file(originalname.replace(/\s+/g, "_"));
    const blobStream = blob.createWriteStream({
        destination: "documents/image.png",
        resumable: false,
    });
    blobStream
        .on("finish", () => {
            const publicUrl = `https://storage.googleapis.com/${bucket.name}/${blob.name}`;
            resolve(publicUrl);
        })
        .on("error", () => {
            reject(`Unable to upload image, something went wrong`);
        })
        .end(buffer);
});

在这里，我将目标设置为 documents/image.png，但文件仍存储在存储桶根目录中，而不是文档文件夹中。如何让文件存储在存储桶中的特定文件夹中？

Answer 1

createWriteStream 在其 configuration 选项中没有名为 destination 的 property！

https://googleapis.dev/nodejs/storage/latest/global.html#CreateWriteStreamOptions

有uploadOptions对象： https://googleapis.dev/nodejs/storage/latest/global.html#UploadOptions

解决方案：您应该使用 upload 便捷方法（包装 createWriteStream）并将 uploadOptions 对象作为 destionation 属性传递给它！ https://googleapis.dev/nodejs/storage/latest/Bucket.html#upload

Answer 2

我已经找到了将文件存储在特定子目录中的方法 google 存储 bucket.Google 将文件存储在其存储桶中，其名称也包含它的路径。例如，如果图像名称 xyz.jpg 存储在 mnp 存储桶中的 abc 文件夹中。文件名将是 mnp/abc/xyz.jpg。因此，要将文件保存在特定目录中，我们只需在原始文件名中添加路径即可。

const uploadImage = (file) =>
    new Promise((resolve, reject) => {
    const { originalname, buffer } = file;

    const blob = 
    bucket.file(originalname.replace(originalname,"document/"+originalname));
    const blobStream = blob.createWriteStream({
        resumable: false,
    });
    blobStream
    .on("finish", () => {
        const publicUrl = `https://storage.googleapis.com/${bucket.name}/${blob.name}`;
        resolve(publicUrl);
    })
    .on("error", () => {
        reject(`Unable to upload image, something went wrong`);
    })
    .end(buffer);
});

使用 multer 和 gcloud 上传文件时未设置目的地

Destination not being set while uploading files using multer and gcloud

blob

node.js

google-cloud-storage

multer