azure-blob-store

Azure Blob storage abstract-blob-store

Installation

Install with npm

$ npm install --save azure-blob-store

Example

var AzureBlobStore = require('azure-blob-store');

var store = new AzureBlobStore({
  accountName: process.env.AZURE_STORAGE_ACCOUNT,
  accountKey: process.env.AZURE_STORAGE_ACCESS_KEY,
  container: process.env.AZURE_STORAGE_CONTAINER
});


// write to azure
fs.createReadStream('/tmp/somefile.txt')
.pipe(store.createWriteStream({ key: 'somefile.txt' }));


// read from azure
store.createReadStream({ key: 'somefile.txt' })
.pipe(fs.createWriteStream('/tmp/somefile.txt'));


// remove
store.remove({ key: 'somefile.txt' }, function(err) {
  store.exists({ key: 'somefile.txt' }, function(err, exists) {
    // exists - if false, blob has been removed
  });
});


// exists
store.exists({ key: 'somefile.txt' }, function(err, exists) {
  // true if blob exists
});

###Note:

Currently this only works on existing containers, so you'll have to create a container beforehand.

API

var AzureBlobStore = require('azure-blob-store');
var store = new AzureBlobStore(options);

options must be an object that has the following properties:

accountName (required) Azure access key. Defaults to `process.env.AZURE_STORAGE_ACCOUNT

accountKey (required) Azure access key. Defaults to process.env.AZURE_STORAGE_ACCESS_KEY

container (required) Azure blob store container to store files in. Defaults to process.env.AZURE_STORAGE_CONTAINER

 store.createWriteStream(opts, cb);

returns a writable stream that you can pipe data to.

opts should be an object that has options key (will be the filename in your container)

opts.azure additional parameters to pass to Azure Blob storage

cb will be called with (err) if there is was an error

store.createReadStream(opts, cb);

opts should be {key: string (usually a hash or path + filename}

opts.azure additional parameters to pass to Azure Blob storage

store.exists(opts, cb);

This checks if a blob exists in the store.

If opts is a string it should be interpreted as a key. Otherwise opts must be an object with a key property (the same key that you got back from createReadStream). The cb should be called with err, exists, where err is an error if something went wrong during the exists check, and exists is a boolean.

store.remove(opts, cb); 

This method should remove a blob from the store.

If opts is a string is should be interpreted as a key. Otherwise opts must be an object with a key property. If the cb is called without an error subsequent calls to .exists with the same opts should return false.

License

The MIT License (MIT)

Copyright (c) 2016 Sven Lito

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.