[英]List blob from Azure Blob Storage and Readstream in Node.js
here is my code how I list the blobs.这是我列出 Blob 的代码。
EDITED!!!已编辑!!!
------------------------------------EDIT------------------------------------------ - - - - - - - - - - - - - - - - - - 编辑 - - - - - - - -----------------------------------------
I edited the code and rewrite in this TypeScript:我在这个 TypeScript 中编辑并重写了代码:
const blobServiceClient = new BlobServiceClient(`https://${accountName}.blob.core.windows.net?${sasToken}`,
pipeline)
const containerClient = blobServiceClient.getContainerClient(containerName)
console.log(containerClient)
if (!containerClient.exists()) {
console.log("the container does not exit")
await containerClient.create()
}
const client = containerClient.getBlockBlobClient(this.currentFile.name)
//name of uploded blob
console.log(this.currentFile.name)
//metaata from the blob
console.log(client)
//List each blobs in the container
for await (const blob of containerClient.listBlobsFlat()) {
console.log('\t', blob.name);
const blockBlobClient = containerClient.getBlockBlobClient(blob.name);
const downloadBlockBlobResponse = await blockBlobClient.download(0);
console.log('\nDownloaded blob content...');
console.log('\t', await streamToString(downloadBlockBlobResponse.readableStreamBody));
//end of loop
}
async function streamToString(readableStream) {
return new Promise((resolve, reject) => {
const chunks = [];
readableStream.on("data", (data) => {
chunks.push(data.toString());
});
readableStream.on("end", () => {
resolve(chunks.join(""));
});
readableStream.on("error", reject);
});
}
But then I receive an error in the browser which called:但是后来我在浏览器中收到一个错误,它调用:
ERROR Error: Uncaught (in promise): TypeError: Cannot read property 'on' of undefined TypeError: Cannot read property 'on' of undefined
错误错误:未捕获(承诺中):TypeError:无法读取未定义的属性“on” TypeError:无法读取未定义的属性“on”
Download the blob by calling the download
method.通过调用
download
方法下载 blob。 The example code includes a helper function called streamToString
, which is used to read a Node.js readable stream into a string .示例代码包括一个名为
streamToString
的助手 function ,用于将 Node.js可读 stream 读入字符串。
Add this code to the end of the main function:将此代码添加到主 function 的末尾:
const blockBlobClient = containerClient.getBlockBlobClient(blob.name);
const downloadBlockBlobResponse = await blockBlobClient.download(0);
console.log('\nDownloaded blob content...');
console.log('\t', await streamToString(downloadBlockBlobResponse.readableStreamBody));
Add this helper function after the main function:在主 function 之后添加这个助手 function:
// A helper function used to read a Node.js readable stream into a string
async function streamToString(readableStream) {
return new Promise((resolve, reject) => {
const chunks = [];
readableStream.on("data", (data) => {
chunks.push(data.toString());
});
readableStream.on("end", () => {
resolve(chunks.join(""));
});
readableStream.on("error", reject);
});
}
For more details, you could refer to this article .更多细节,你可以参考这篇文章。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.