如何上傳/下載所有格式的excel文件到azure blob存儲Nodejs服務器端

Question

我正在嘗試將 excel 文件上傳到 azure blob 存儲

import { DefaultAzureCredential } from '@azure/identity';
import { BlobServiceClient } from '@azure/storage-blob';

// Enter your storage account name
const account = process.env.ACCOUNT_NAME;

// Unique name for the container
const containerName = process.env.CONTAINER_NAME;

// Azure AD Credential information is required to run this sample:
if (
  !process.env.AZURE_TENANT_ID ||
  !process.env.AZURE_CLIENT_ID ||
  !process.env.AZURE_CLIENT_SECRET || !account || !containerName
) {
  return next(SystemResponse.badRequestError('Azure AD authentication information not provided, but it is required to run this sample. Exiting.'));
}

const defaultAzureCredential = new DefaultAzureCredential();
const blobServiceClient = new BlobServiceClient(
  `https://${account}.blob.core.windows.net`,
  defaultAzureCredential,
);



// Get a reference to a container
const containerClient = blobServiceClient.getContainerClient(containerName);

// Upload data to the blob
const blobName = `${req.files.file.name.split('.')[0]}+${new Date().getTime()}.${req.files.file.name.split('.')[1]}`;

// create blobClient for container
const blockBlobClient = containerClient.getBlockBlobClient(blobName);

// upload file
const uploadBlobResponse = await blockBlobClient.upload(`${containerName}${req.files.file.path}`, req.files.file.size);

我正在使用 postman 上傳 excel 文件，但是，只有文件路徑存儲在 excel 文件中，實際上沒有內容，我該如何解決這個問題請幫忙？ && 下載文件名正在響應

Answer 1

我創建了一個azure function也許你可以使用parse-multipart來接收你的文件：

安裝：

npm install parse-multipart

代碼：

import { AzureFunction, Context, HttpRequest } from "@azure/functions"
import { DefaultAzureCredential } from '@azure/identity';
import { BlobServiceClient } from '@azure/storage-blob';

const httpTrigger: AzureFunction = async function (context: Context, req: HttpRequest): Promise<void> {
    var multipart = require('parse-multipart');
    var bodyBuffer = Buffer.from(req.body);
    var boundary = multipart.getBoundary(req.headers['content-type']);
    var parts = multipart.Parse(bodyBuffer, boundary);

    // Enter your storage account name
    const account = process.env.ACCOUNT_NAME;

    // Unique name for the container
    const containerName = process.env.CONTAINER_NAME;

    // Azure AD Credential information is required to run this sample:
    if (
      !process.env.AZURE_TENANT_ID ||
      !process.env.AZURE_CLIENT_ID ||
      !process.env.AZURE_CLIENT_SECRET || !account || !containerName
    ) {
      return next(SystemResponse.badRequestError('Azure AD authentication information not provided, but it is required to run this sample. Exiting.'));
    }

    const defaultAzureCredential = new DefaultAzureCredential();
    const blobServiceClient = new BlobServiceClient(
      `https://${account}.blob.core.windows.net`,
      defaultAzureCredential,
    );



    // Get a reference to a container
    const containerClient = blobServiceClient.getContainerClient(containerName);

    // Upload data to the blob
    const blobName = `${parts[0].filename.split('.')[0]}+${new Date().getTime()}.${parts[0].filename.split('.')[1]}`;

    // create blobClient for container
    const blockBlobClient = containerClient.getBlockBlobClient(blobName);

    // upload file
    const uploadBlobResponse = await blockBlobClient.upload(parts[0].data , parts[0].data.length);
};

原因：

function upload(body: HttpRequestBody, contentLength: number, options?: BlockBlobUploadOptions)

HttpRequestBody的值應該是Blob, string, ArrayBuffer, ArrayBufferView or a function which returns a new Readable stream whose offset is from data source beginning的，所以你不應該使用路徑。

================更新=======================

根據討論，應該按照相對路徑讀取文件，將文件的二進制數據轉換成base64字符串。

var fs = require('fs');
var path = require('path'); 
//set relative path to file 
let relativePath = path.relative(process.cwd(),${req.files.file.path}); 
//reading binary data of file 
let binaryData=fs.readFileSync(relativePath); 
//converting binary data to base64 string 
let base64String=Buffer.from(binaryData).toString("base64")
await blockBlobClient.upload(base64String, req.files.file.size);

================update2====================

    const containerClient = blobServiceClient.getContainerClient(containerName);

    // Upload data to the blob
    const blobName = `xxx.xlsx`;

    // create blobClient for container
    const blockBlobClient = containerClient.getBlockBlobClient(blobName);

    const downloadBlockBlobResponse = blockBlobClient.downloadToFile("D:\\xxx\\xxx.xlsx");