gaia-vault-mcp/dist/tools/download-blob.js

Azure Blob Storage MCP server for AI assistants

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
const storage_blob_1 = require("@azure/storage-blob");
const fs = __importStar(require("fs"));
const path = __importStar(require("path"));
const env_1 = require("../config/env");
exports.default = async (containerName, blobName, options) => {
    const { connectionString } = (0, env_1.getAzureConfig)();
    // Create BlobServiceClient
    const blobServiceClient = storage_blob_1.BlobServiceClient.fromConnectionString(connectionString);
    // Get container client
    const containerClient = blobServiceClient.getContainerClient(containerName);
    // Get block blob client
    const blockBlobClient = containerClient.getBlockBlobClient(blobName);
    // Check if blob exists
    const exists = await blockBlobClient.exists();
    if (!exists) {
        throw new Error(`Blob ${blobName} does not exist in container ${containerName}`);
    }
    if (!options.pathFile && !options.asText) {
        throw new Error("Either pathFile or asText must be provided");
    }
    if (options.pathFile) {
        // Ensure directory exists
        const dir = path.dirname(options.pathFile);
        if (!fs.existsSync(dir)) {
            fs.mkdirSync(dir, { recursive: true });
        }
        // Download to file
        await blockBlobClient.downloadToFile(options.pathFile);
        return `File downloaded successfully to: ${options.pathFile}`;
    }
    else {
        // Download as text
        const downloadResponse = await blockBlobClient.download();
        const downloadedContent = await streamToString(downloadResponse.readableStreamBody);
        return downloadedContent;
    }
};
// Helper function to convert stream to 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);
    });
}