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AWS Presigned URLs

Presigned URLs are useful for fine-grained access control to resources on s3.

For example, if storing larger text blocks than DynamoDB might allow with its 400KB size limits s3 is a useful option.

Ignoring various ACL methods and using presigned URLs, it's possible to create lambda functions that can generate the required upload and download URLs.

Using the default IAM roles and lambda proxy configuration of serverless, lambdas are assigned an IAM role for the application (so that a logical group of functions can share resources - e.g. for a CRUD REST API). Each function then assumes the IAM role via its own function name.

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Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

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emacs --daemon to run in the background. emacsclient.emacs24 <filename/dirname> to open in terminal

NOTE: "M-m and SPC can be used interchangeably".

• Undo - C-/
• Redo - C-?
• Change case: 1. Camel Case : M-c 2. Upper Case : M-u

3. Lower Case : M-l

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Keybase proof

I hereby claim:

• I am binarycrayon on github.
• I am binarycrayon (https://keybase.io/binarycrayon) on keybase.
• I have a public key ASCxZIyqISYZegFfEyIcC5-Vr6qEN75AxA7QY__9TXqPtgo

To claim this, I am signing this object:

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Steps for Remote Pairing using tmux and ngrok

The following steps facilitate remote pairing using:

• tmux which allows terminal sessions to be attached to different terminals, and
• ngrok which provides secure tunnels to your localhost

1. Install tmux

OS X: brew install tmux

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tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. I use dvorak and I used CAP for C, and C-, work the best for me. Adding this to ~/.tmux.conf:

remap prefix to Alt + b

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Provider	Singleton	Instantiable	Configurable
Constant	Yes	No	No
Value	Yes	No	No
Service	Yes	No	No
Factory	Yes	Yes	No
Decorator	Yes	No?	No
Provider	Yes	Yes	Yes

Constant

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#-*- coding:utf-8 -*- 
import Queue
from contextlib import contextmanager

class ObjectPool(object):
  """A simple object pool with thread safe"""
  def __init__(self,objectFn,*args,**kwargs):
    super(ObjectPool, self).__init__()
    self.objectFn = objectFn
    self.objectCls = None

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import threading


# Based on tornado.ioloop.IOLoop.instance() approach.
# See https://github.com/facebook/tornado
class SingletonMixin(object):
	__singleton_lock = threading.Lock()
	__singleton_instance = None

	@classmethod

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    // interface class, String ID of implementer class, testImpl is an alternative implementation of PreviewController
    Lookup.Template template = new Lookup.Template(PreviewController.class, "org.gephi.preview.testImpl", null);
    Result result = Lookup.getDefault().lookup(template);
    Lookup.Item it=Lookup.getDefault().lookupItem(template);
    PreviewController instance = it.getInstance();
    
    System.out.println("the instance is: " + instance.toString()); 
    // output: the instance is org.gephi.preview.testImpl@69fe571f

    template = new Lookup.Template(PreviewController.class, "org.gephi.preview.PreviewControllerImpl", null);