kloud

kloud

   

aliyun OSS(Open Storage Service) lib. A node wrapper for OSS RESTful API.

Install

npm install kloud --save

Usage

First, create an OSS client:

var client = kloud.createClient({
  accessKeyId: '<your access key id>',
  accessKeySecret: '<your access key secret>',
  host: '<your bucket host>', // region.aliyuncs.com
  bucket: '<your bucket name>'
});

PUT

Use the Client#put(filename, headers) method with a string or buffer to upload some strings to OSS, just like node http.Client request. Return a duplex stream, you can listen for a response event on it, and write the content using req.end(content).

var str = JSON.stringify({ foo: 'bar' });
var req = client.put('test.json', {
  'Content-Type': 'application/json',
  'Content-Length': str.length
});
 
req.on('response', function(res) {
  if (res.statusCode === 200) {
    console.log('file saved.');
  }
});
 
req.end(str);

Use the Client#putFile(src, filename, headers, callback) to upload a file to OSS:

client.putFile('./README.md', 'readme.markdown', function(err, res) {
  // res.statusCode === 200
});

Or use the Client#putStream(stream, filename, headers, callback):

http.get('http://google.com/doodle.png', function(res){
  var headers = {
    'Content-Length': res.headers['content-length'],
    'Content-Type': res.headers['content-type']
  };
 
  client.putStream(res, 'doodle.png', headers, function(err, res){
    // res.statusCode === 200
  });
});

Important: use stream mode you have to set Content-Length header!

fs.stat('./README.md', function(err, stat) {
  var headers = {
    'Content-Length': stat.size,
    'Content-Type': 'text/plain'
  };
  var req = client.put('readme.markdown', headers);
 
  req.on('response', function(res) {
    // res.statusCode === 200
  });
 
  fs.createReadStream('./README.md').pipe(req);
})

Also, you can use Client.putBuffer(buffer, filename, headers, callback) to put a string or buffer data:

var buf = new Buffer('hello world');
 
client.putBuffer(buf, 'test.txt', function(err, res) {});

GET

Use the Client.get(filename, headers) to get an OSS object:

var req = client.get('readme.markdown');
req.on('response', function(res) {
  // res.statusCode === 200
 
  var chunks = [];
  var chunkLen = 0;
 
  res.on('data', function(chunk) {
    chunks.push(chunk);
    chunkLen += chunk.length;
  });
 
  res.on('end', function() {
    console.log(Buffer.concat(chunks, chunkLen).toString());
  });
});

Or use Client#getFile(filename, headers, callback):

client.getFile('readme.markdown', function(err, res) {
  // res.statusCode === 200
 
  var dest = fs.createWriteSteam('./test.md');
  res.pipe(dest);
});

DELETE

Use Client#del(filename, headers) to delete an OSS object:

client.del('readme.markdown').on('response', function(err, res) {
  // res.statusCode === 200
  // Deleted!
});

Or Client#deleteFile(filename, headers, callback):

client.deleteFile('readme.markdown', function(err, res) {});

You can delete up to 1000 OSS objects at once:

client.deleteMultiple(['test.json', 'readme.markdown'], function(err, res) {});