CtrlK
BlogDocsLog inGet started
Tessl Logo

azure-storage-file-share-ts

Azure File Share JavaScript/TypeScript SDK (@azure/storage-file-share) for SMB file share operations.

47

Quality

50%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./skills/azure-storage-file-share-ts/SKILL.md
SKILL.md
Quality
Evals
Security

@azure/storage-file-share (TypeScript/JavaScript)

SDK for Azure File Share operations — SMB file shares, directories, and file operations.

Installation

npm install @azure/storage-file-share @azure/identity

Current Version: 12.x
Node.js: >= 18.0.0

Environment Variables

AZURE_STORAGE_ACCOUNT_NAME=<account-name>
AZURE_STORAGE_ACCOUNT_KEY=<account-key>
# OR connection string
AZURE_STORAGE_CONNECTION_STRING=DefaultEndpointsProtocol=https;AccountName=...

Authentication

Connection String (Simplest)

import { ShareServiceClient } from "@azure/storage-file-share";

const client = ShareServiceClient.fromConnectionString(
  process.env.AZURE_STORAGE_CONNECTION_STRING!
);

StorageSharedKeyCredential (Node.js only)

import { ShareServiceClient, StorageSharedKeyCredential } from "@azure/storage-file-share";

const accountName = process.env.AZURE_STORAGE_ACCOUNT_NAME!;
const accountKey = process.env.AZURE_STORAGE_ACCOUNT_KEY!;

const sharedKeyCredential = new StorageSharedKeyCredential(accountName, accountKey);
const client = new ShareServiceClient(
  `https://${accountName}.file.core.windows.net`,
  sharedKeyCredential
);

DefaultAzureCredential

import { ShareServiceClient } from "@azure/storage-file-share";
import { DefaultAzureCredential } from "@azure/identity";

const accountName = process.env.AZURE_STORAGE_ACCOUNT_NAME!;
const client = new ShareServiceClient(
  `https://${accountName}.file.core.windows.net`,
  new DefaultAzureCredential()
);

SAS Token

import { ShareServiceClient } from "@azure/storage-file-share";

const accountName = process.env.AZURE_STORAGE_ACCOUNT_NAME!;
const sasToken = process.env.AZURE_STORAGE_SAS_TOKEN!;

const client = new ShareServiceClient(
  `https://${accountName}.file.core.windows.net${sasToken}`
);

Client Hierarchy

ShareServiceClient (account level)
└── ShareClient (share level)
    └── ShareDirectoryClient (directory level)
        └── ShareFileClient (file level)

Share Operations

Create Share

const shareClient = client.getShareClient("my-share");
await shareClient.create();

// Create with quota (in GB)
await shareClient.create({ quota: 100 });

List Shares

for await (const share of client.listShares()) {
  console.log(share.name, share.properties.quota);
}

// With prefix filter
for await (const share of client.listShares({ prefix: "logs-" })) {
  console.log(share.name);
}

Delete Share

await shareClient.delete();

// Delete if exists
await shareClient.deleteIfExists();

Get Share Properties

const properties = await shareClient.getProperties();
console.log("Quota:", properties.quota, "GB");
console.log("Last Modified:", properties.lastModified);

Set Share Quota

await shareClient.setQuota(200); // 200 GB

Directory Operations

Create Directory

const directoryClient = shareClient.getDirectoryClient("my-directory");
await directoryClient.create();

// Create nested directory
const nestedDir = shareClient.getDirectoryClient("parent/child/grandchild");
await nestedDir.create();

List Directories and Files

const directoryClient = shareClient.getDirectoryClient("my-directory");

for await (const item of directoryClient.listFilesAndDirectories()) {
  if (item.kind === "directory") {
    console.log(`[DIR] ${item.name}`);
  } else {
    console.log(`[FILE] ${item.name} (${item.properties.contentLength} bytes)`);
  }
}

Delete Directory

await directoryClient.delete();

// Delete if exists
await directoryClient.deleteIfExists();

Check if Directory Exists

const exists = await directoryClient.exists();
if (!exists) {
  await directoryClient.create();
}

File Operations

Upload File (Simple)

const fileClient = shareClient
  .getDirectoryClient("my-directory")
  .getFileClient("my-file.txt");

// Upload string
const content = "Hello, World!";
await fileClient.create(content.length);
await fileClient.uploadRange(content, 0, content.length);

Upload File (Node.js - from local file)

import * as fs from "fs";
import * as path from "path";

const fileClient = shareClient.rootDirectoryClient.getFileClient("uploaded.txt");
const localFilePath = "/path/to/local/file.txt";
const fileSize = fs.statSync(localFilePath).size;

await fileClient.create(fileSize);
await fileClient.uploadFile(localFilePath);

Upload File (Buffer)

const buffer = Buffer.from("Hello, Azure Files!");
const fileClient = shareClient.rootDirectoryClient.getFileClient("buffer-file.txt");

await fileClient.create(buffer.length);
await fileClient.uploadRange(buffer, 0, buffer.length);

Upload File (Stream)

import * as fs from "fs";

const fileClient = shareClient.rootDirectoryClient.getFileClient("streamed.txt");
const readStream = fs.createReadStream("/path/to/local/file.txt");
const fileSize = fs.statSync("/path/to/local/file.txt").size;

await fileClient.create(fileSize);
await fileClient.uploadStream(readStream, fileSize, 4 * 1024 * 1024, 4); // 4MB buffer, 4 concurrency

Download File

const fileClient = shareClient
  .getDirectoryClient("my-directory")
  .getFileClient("my-file.txt");

const downloadResponse = await fileClient.download();

// Read as string
const chunks: Buffer[] = [];
for await (const chunk of downloadResponse.readableStreamBody!) {
  chunks.push(Buffer.from(chunk));
}
const content = Buffer.concat(chunks).toString("utf-8");

Download to File (Node.js)

const fileClient = shareClient.rootDirectoryClient.getFileClient("my-file.txt");
await fileClient.downloadToFile("/path/to/local/destination.txt");

Download to Buffer (Node.js)

const fileClient = shareClient.rootDirectoryClient.getFileClient("my-file.txt");
const buffer = await fileClient.downloadToBuffer();
console.log(buffer.toString());

Delete File

const fileClient = shareClient.rootDirectoryClient.getFileClient("my-file.txt");
await fileClient.delete();

// Delete if exists
await fileClient.deleteIfExists();

Copy File

const sourceUrl = "https://account.file.core.windows.net/share/source.txt";
const destFileClient = shareClient.rootDirectoryClient.getFileClient("destination.txt");

// Start copy operation
const copyPoller = await destFileClient.startCopyFromURL(sourceUrl);
await copyPoller.pollUntilDone();

File Properties & Metadata

Get File Properties

const fileClient = shareClient.rootDirectoryClient.getFileClient("my-file.txt");
const properties = await fileClient.getProperties();

console.log("Content-Length:", properties.contentLength);
console.log("Content-Type:", properties.contentType);
console.log("Last Modified:", properties.lastModified);
console.log("ETag:", properties.etag);

Set Metadata

await fileClient.setMetadata({
  author: "John Doe",
  category: "documents",
});

Set HTTP Headers

await fileClient.setHttpHeaders({
  fileContentType: "text/plain",
  fileCacheControl: "max-age=3600",
  fileContentDisposition: "attachment; filename=download.txt",
});

Range Operations

Upload Range

const data = Buffer.from("partial content");
await fileClient.uploadRange(data, 100, data.length); // Write at offset 100

Download Range

const downloadResponse = await fileClient.download(100, 50); // offset 100, length 50

Clear Range

await fileClient.clearRange(0, 100); // Clear first 100 bytes

Snapshot Operations

Create Snapshot

const snapshotResponse = await shareClient.createSnapshot();
console.log("Snapshot:", snapshotResponse.snapshot);

Access Snapshot

const snapshotShareClient = shareClient.withSnapshot(snapshotResponse.snapshot!);
const snapshotFileClient = snapshotShareClient.rootDirectoryClient.getFileClient("file.txt");
const content = await snapshotFileClient.downloadToBuffer();

Delete Snapshot

await shareClient.delete({ deleteSnapshots: "include" });

SAS Token Generation (Node.js only)

Generate File SAS

import {
  generateFileSASQueryParameters,
  FileSASPermissions,
  StorageSharedKeyCredential,
} from "@azure/storage-file-share";

const sharedKeyCredential = new StorageSharedKeyCredential(accountName, accountKey);

const sasToken = generateFileSASQueryParameters(
  {
    shareName: "my-share",
    filePath: "my-directory/my-file.txt",
    permissions: FileSASPermissions.parse("r"), // read only
    expiresOn: new Date(Date.now() + 3600 * 1000), // 1 hour
  },
  sharedKeyCredential
).toString();

const sasUrl = `https://${accountName}.file.core.windows.net/my-share/my-directory/my-file.txt?${sasToken}`;

Generate Share SAS

import { ShareSASPermissions, generateFileSASQueryParameters } from "@azure/storage-file-share";

const sasToken = generateFileSASQueryParameters(
  {
    shareName: "my-share",
    permissions: ShareSASPermissions.parse("rcwdl"), // read, create, write, delete, list
    expiresOn: new Date(Date.now() + 24 * 3600 * 1000), // 24 hours
  },
  sharedKeyCredential
).toString();

Error Handling

import { RestError } from "@azure/storage-file-share";

try {
  await shareClient.create();
} catch (error) {
  if (error instanceof RestError) {
    switch (error.statusCode) {
      case 404:
        console.log("Share not found");
        break;
      case 409:
        console.log("Share already exists");
        break;
      case 403:
        console.log("Access denied");
        break;
      default:
        console.error(`Storage error ${error.statusCode}: ${error.message}`);
    }
  }
  throw error;
}

TypeScript Types Reference

import {
  // Clients
  ShareServiceClient,
  ShareClient,
  ShareDirectoryClient,
  ShareFileClient,

  // Authentication
  StorageSharedKeyCredential,
  AnonymousCredential,

  // SAS
  FileSASPermissions,
  ShareSASPermissions,
  AccountSASPermissions,
  AccountSASServices,
  AccountSASResourceTypes,
  generateFileSASQueryParameters,
  generateAccountSASQueryParameters,

  // Options & Responses
  ShareCreateResponse,
  FileDownloadResponseModel,
  DirectoryItem,
  FileItem,
  ShareProperties,
  FileProperties,

  // Errors
  RestError,
} from "@azure/storage-file-share";

Best Practices

  1. Use connection strings for simplicity — Easiest setup for development
  2. Use DefaultAzureCredential for production — Enable managed identity in Azure
  3. Set quotas on shares — Prevent unexpected storage costs
  4. Use streaming for large files — uploadStream/downloadToFile for files > 256MB
  5. Use ranges for partial updates — More efficient than full file replacement
  6. Create snapshots before major changes — Point-in-time recovery
  7. Handle errors gracefully — Check RestError.statusCode for specific handling
  8. Use *IfExists methods — For idempotent operations

Platform Differences

FeatureNode.jsBrowser
StorageSharedKeyCredential✅❌
uploadFile()✅❌
uploadStream()✅❌
downloadToFile()✅❌
downloadToBuffer()✅❌
SAS generation✅❌
DefaultAzureCredential✅❌
Anonymous/SAS access✅✅

When to Use

This skill is applicable to execute the workflow or actions described in the overview.

Repository
administrakt0r/AI-Agents-Safe-Coding-Skills
Path

skills/azure-storage-file-share-ts/SKILL.md

Commit

57c135b

Last updated
First committed

Also appears in

administrakt0r/AI-Agents-Safe-Coding-Skills
In sync

since Aug 19, 2026

administrakt0r/AI-Agents-Safe-Coding-Skills
In sync

since Aug 19, 2026

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.

Claim skill