首页 > 解决方案 > 仅从 Azure 存储 [Azure-Blob][REST] 中的 Blob 列表获取特定元数据

问题描述

我可以通过此代码通过 Azure Blob 中的 REST 调用成功获取容器中的 Blob 列表。

const request = require("request");  
require("dotenv").config();

const account = process.env.ACCOUNT_NAME || "";
const key = process.env.ACCOUNT_KEY || "";
var strTime = new Date().toUTCString();
const containerName = "demo";

const BearerToken = <BearerToken>;

const options = {
  url: `https://${account}.blob.core.windows.net/${containerName}?comp=list&restype=container`,

  headers: {
    Authorization: `Bearer ${BearerToken}`,
    "x-ms-date": strTime, //var strTime = new Date().toUTCString();
    "x-ms-version": "2019-02-02", // Stable xms vesrion
  },
};

function callback(error, response, body) {
  console.log(response.body);
}

request(options, callback);

代码的输出:

 <?xml version="1.0" encoding="utf-8"?>
<EnumerationResults ServiceEndpoint="https://<storageaccount>.blob.core.windows.net/" ContainerName="demo">
    <Blobs>
        <Blob>
            <Name>
                Mayank Photo.jpg
            </Name>
            <Properties>
                <Creation-Time>
                    Fri, 12 Mar 2021 09:09:32 GMT
                </Creation-Time>
                <Last-Modified>
                    Fri, 12 Mar 2021 09:09:32 GMT
                </Last-Modified>
                <Etag>
                    0x8D8E5368CBE80AB
                </Etag>
                <Content-Length>
                    16685
                </Content-Length>
                <Content-Type>
                    image/jpeg
                </Content-Type>
                <Content-Encoding />
                <Content-Language />
                <Content-CRC64 />
                <Content-MD5>
                    AIoyEnG9amzFlWZ7t1YlCw==
                </Content-MD5>
                <Cache-Control />
                <Content-Disposition />
                <BlobType>
                    BlockBlob
                </BlobType>
                <AccessTier>
                    Hot
                </AccessTier>
                <AccessTierInferred>
                    true
                </AccessTierInferred>
                <LeaseStatus>
                    unlocked
                </LeaseStatus>
                <LeaseState>
                    available
                </LeaseState>
                <ServerEncrypted>
                    true
                </ServerEncrypted>
            </Properties>
        </Blob>
        <Blob>
            <Name>
                MayankPhoto.jpg
            </Name>
            <Properties>
                <Creation-Time>
                    Fri, 12 Mar 2021 09:10:28 GMT
                </Creation-Time>
                <Last-Modified>
                    Fri, 12 Mar 2021 09:10:28 GMT
                </Last-Modified>
                <Etag>
                    0x8D8E536AE20F3A1
                </Etag>
                <Content-Length>
                    16685
                </Content-Length>
                <Content-Type>
                    image/jpeg
                </Content-Type>
                <Content-Encoding />
                <Content-Language />
                <Content-CRC64 />
                <Content-MD5>
                    AIoyEnG9amzFlWZ7t1YlCw==
                </Content-MD5>
                <Cache-Control />
                <Content-Disposition />
                <BlobType>
                    BlockBlob
                </BlobType>
                <AccessTier>
                    Hot
                </AccessTier>
                <AccessTierInferred>
                    true
                </AccessTierInferred>
                <LeaseStatus>
                    unlocked
                </LeaseStatus>
                <LeaseState>
                    available
                </LeaseState>
                <ServerEncrypted>
                    true
                </ServerEncrypted>
            </Properties>
        </Blob>
    </Blobs>
    <NextMarker />
</EnumerationResults>

正如您所看到的,除了 blob 名称之外,还有许多其他字段/元数据返回,有没有办法在输出中仅获取某些特定的元数据字段,例如:文件名、DateCreated、ContentLength。因为有时我可能会遇到一长串文件,在这种情况下我需要一个简短而快速的响应。

我认为它可能与此处指定的包含中的元数据 URL 参数有关,但我不知道如何相应地修改我的 URL。

标签: azurerestazure-blob-storageazure-rest-api

解决方案


它在文档中提到,您只需要将它作为

https://myaccount.blob.core.windows.net/mycontainer?restype=container&comp=list&include=snapshots&include=metadata  

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