如何从 Azure 容器中的 blob 中获取所有 URL 的列表？

Posted 2023-03-22

【中文标题】如何从 Azure 容器中的 blob 中获取所有 URL 的列表？

【英文标题】：How to get a list of all URLs from blobs in a container in Azure?

【发布时间】：2021-05-06 11:41:16

【问题描述】：

到目前为止，我列出了 Azure Blob 存储中容器中 Blob 的名称和创建日期。 现在我想添加来自相同 blob 的 URL 列表。我做了很多研究，但我真的找不到有用的东西。 是否可以使用我用于其他 blob 属性的相同方法来实现这一点，还是有其他方法？

我的代码：

using System.Threading.Tasks;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Azure.Storage.Blobs;
using System;
using System.Collections.Generic;

namespace getBlobData


    // Define data transfer objects (DTO)
    public class ContainerInfo
    
        public string Name
        
            get; set;
        

        public DateTimeOffset? CreatedOn
        
            get; set;
        
    

    public static class GetBlobData
    
        [FunctionName("getBlobData")]
        public static async Task<List<ContainerInfo>> Run(
            [HttpTrigger(AuthorizationLevel.Function, "get", Route = null)] HttpRequest req,
            ILogger log)
        
            // Connect to container in storage account
            // Get Blobs inside of it
            string connection_string = Environment.GetEnvironmentVariable("AZURE_STORAGE_CONNECTION_STRING");
            BlobServiceClient blobServiceClient = new BlobServiceClient(connection_string);
            BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient("container");
            var response = containerClient.GetBlobsAsync();

            // Get name and creation date of Blobs
            // Return DTOs
            var res = new List<ContainerInfo>();
            await foreach (var item in response)
            
                res.Add(new ContainerInfo  Name = item.Name, CreatedOn = item.Properties.CreatedOn );
            

            return res;
        

    

【参考方案1】：

如果您使用的是最新的 azure 存储包Azure.Storage.Blobs 12.8.0，则有 2 种方法可以获取 blob url。

1.您可以自己构建blob url。首先，您需要获取blob container url，然后将blob 容器url 与blob name 连接起来，代码如下：

        //other code
        BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient("container");

        //get the container url here
        string container_url = containerClient.Uri.ToString();
        var response = containerClient.GetBlobsAsync();

        // Get name and creation date of Blobs
        // Return DTOs
        var res = new List<ContainerInfo>();
        await foreach (var item in response)
        
            //here you can concatenate the container url with blob name
            string blob_url = container_url + "/" + item.Name;                

            res.Add(new ContainerInfo  Name = item.Name, CreatedOn = item.Properties.CreatedOn );
        

2.另外一个就是你得到blob名字后，可以使用blob名字来获取BlobClient，然后就可以从BlobClient获取blob url。代码如下：

        //other code
        BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient("container");
        var response = containerClient.GetBlobsAsync();

        //define a BlobClient here.
        BlobClient blobClient = null;

        // Get name and creation date of Blobs
        // Return DTOs
        var res = new List<ContainerInfo>();
        await foreach (var item in response)
        
            //here you can get a BlobClient by using blob name
            blobClient = containerClient.GetBlobClient(item.Name); 

            //then you can get the blob url by using BlobClient
            string blob_url = blobClient.Uri.ToString();              

            res.Add(new ContainerInfo  Name = item.Name, CreatedOn = item.Properties.CreatedOn );
        

【参考方案2】：

我假设您可以按照 blob URL 构造的约定来生成相关的 URL

https://myaccount.blob.core.windows.net/mycontainer/myblob

https://docs.microsoft.com/en-us/rest/api/storageservices/copy-blob-from-url