Azure blob adapter

lib/azure.js

@@ -0,0 +1,116 @@
+var Gun = require('../gun');
+var azureBlobStore;
+let containerClient;
+
+const { Readable } = require('stream');
+const { BlobServiceClient, StorageSharedKeyCredential } = require("@azure/storage-blob");
+
+Gun.on('create', function(root) {
+    console.log("Please note this adapter for azure is not fully working yet");
+    this.to.next(root);
+    var opt = root.opt;
+    if (!opt.azureBlob && !process.env.AZURE_BLOB_CONTAINER) {
+        return;
+    }
+
+    try {
+        azureBlobStore = require('@azure/storage-blob');
+    } catch (e) {
+        console.log("Please `npm install @azure/storage-blob` or add it to your package.json !");
+    }
+
+    var opts = opt.azureBlob || (opt.azureBlob = {});
+    opts.accountName = opts.accountName || process.env.AZURE_BLOB_ACCOUNT_NAME;
+    opts.accountKey = opts.accountKey || process.env.AZURE_BLOB_ACCOUNT_KEY;
+    opts.containerName = opts.containerName || process.env.AZURE_BLOB_CONTIAINER_NAME;
+
+    const storageAccountBaseUrl = `https://${opts.accountName}.blob.core.windows.net`,
+          sharedKeyCredential = new StorageSharedKeyCredential(opts.accountName, opts.accountKey);
+
+    const blobServiceClient = new BlobServiceClient(
+        storageAccountBaseUrl,
+        sharedKeyCredential
+    );
+
+    containerClient = blobServiceClient.getContainerClient(opts.containerName);
+
+    // Check if the container exists, if not, create it
+    containerClient.exists().then((exists) => {
+        if (!exists) {
+            containerClient.create();
+            console.log(`Blob container ${opts.containerName} created successfully.`);
+        }
+    }).catch((error) => {
+        console.error("Error checking container existence:", error);
+    });
+
+    opt.store = Store(opt);
+});
+
+function Store(opt) {
+    opt = opt || {};
+    opt.file = String(opt.file || 'radata');
+    var opts = opt.azureBlob,
+        azureBlob = opts.azureBlob;
+    var c = { p: {}, g: {}, l: {} };
+
+    var store = function Store() {};
+    if (Store[opt.file]) {
+        console.log("Warning: reusing same Azure Blob store and options as 1st.");
+        return Store[opt.file];
+    }
+    Store[opt.file] = store;
+
+    store.put = async function(file, data, cb) {
+        try {
+            const blobClient = containerClient.getBlockBlobClient(file);
+            const stream = Readable.from(data);
+            const uploadResponse = await blobClient.uploadStream(stream, data.length, undefined, undefined);
+            console.log("File uploaded successfully", uploadResponse);
+            cb(null, 'azure');
+        } catch (error) {
+            console.error("Error uploading file:", error);
+            cb(error, null);
+        }
+    };
+
+    store.get = async function(file, cb) {
+        try {
+            const blobClient = containerClient.getBlockBlobClient(file);
+            const downloadResponse = await blobClient.download(0);
+            const downloadedData = [];
+            downloadResponse.readableStreamBody.on("data", (data) => {
+                downloadedData.push(data.toString());
+            });
+            downloadResponse.readableStreamBody.on("end", () => {
+                const data = downloadedData.join('');
+                cb(null, data);
+            });
+            downloadResponse.readableStreamBody.on("error", (err) => {
+                console.error("Error reading stream:", err);
+                cb(err, null);
+            });
+        } catch (error) {
+            // console.error("Error downloading file:", error);
+            cb(error, null);
+        }
+    };
+
+    store.list = async function(cb) {
+        try {
+            const response = await containerClient.listBlobsFlat();
+            const keys = [];
+            response.segment.blobItems.forEach((blob) => {
+                keys.push(blob.name);
+            });
+            cb(keys);
+        } catch (error) {
+            //console.error("Error listing blobs:", error);
+            cb([]);
+        }
+    };
+
+    return store;
+}
+
+module.exports = Store;

lib/server.js

@@ -15,6 +15,8 @@
 	require('./rfs');
 	require('./rs3');
 	require('./wire');
+	require('./azure')
+
 
 	try{require('../sea');}catch(e){}
 	try{require('../axe');}catch(e){}