Tornado_s3 - Tornado client for AWS S3

This is based on:

https://gist.github.com/nanvel/c489761a11ec2db184c5

and:

http://docs.aws.amazon.com/general/latest/gr/sigv4-signed-request-examples.html

The code has been modified to work with Python3. I used this to handle some user uploaded small binaries (can fit into memory) to the server.

Command line testing tool

python -m tornado_s3.cmdline --help

Tornado Example

An example handler would roughly look like below

class Handler(web.RequestHandler):
    def initialize(self, **kwargs):
        self.client = tornado_s3.S3Client(**kwargs)

    @gen.coroutine
    def post(self, path):
        fileinfo = self.request.files['upload'][0]
        name = fileinfo['filename']
        data = fileinfo['body']
        resp = yield self.client.put(path + '/' + name, data)
        self.set_status(resp.code)
        self.write(resp.body)

    @gen.coroutine
    def get(self, path, include_body=True):
        resp = yield self.client.get(
            path, method='GET' if include_body else 'HEAD'
        )
        self.set_status(resp.code)
        if include_body:
            self.write(resp.body)
        for key, value in resp.headers.get_all():
            self.add_header(key, value)

    def head(self, path):
        return self.get(path, False)

    @gen.coroutine
    def delete(self, path):
        resp = yield self.client.get(path, method='DELETE')
        self.set_status(resp.code)
        self.write(resp.body)