Patrick Kastner kastnerp

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

Merge Wiki Changes From A Forked Github Repo

This is inspired (or basically copied) from How To Merge Github Wiki Changes From One Repository To Another, by Roman Ivanov, and serves to ensure that should something happen to the original article, the information remains nice and safe here.

Terminology

OREPO: original repo - the repo created or maintained by the owner

FREPO: the forked repo that presumably has updates to its wiki, not yet on the OREPO

Processing LiDAR to extract building heights

Walk through

Detailed walk through of building extraction using postgis

First lets pull a data layer from of openstreetmap. You can do this any which way you’d like, as there are a variety of methods for pulling openstreetmap data from their database. Check the [wiki] (http://wiki.openstreetmap.org/wiki/Downloading_data) for a comprehensive list. My favourite method thus far is pulling the data straight into QGIS using the open layers plugin. For those who may want to explore this method, check [this tutorial] (http://www.qgistutorials.com/en/docs/downloading_osm_data.html). For building extraction you only need building footprints, and include the building tags. Not all polygons are of type building in OSM, so we can download all the polygons, and then filter the layer for only polygons tagged as buildings.

LiDAR data was pulled from USGS via the Earth Explorer site. [Here] (http://earthobservatory.nasa.gov/blogs/ele

Arrange files like this:

apple/
  __init__.py
  apple.py
tests/
  test_everything.py

To implement API authentication in KeystoneJS, you need the following:

For key based authentication

Middleware that validates the key in the request body or a header

For session based authentication

An endpoint that handles signin
An endpoint that handles signout

	// Includes functions for exporting active sheet or all sheets as JSON object (also Python object syntax compatible).
	// Tweak the makePrettyJSON_ function to customize what kind of JSON to export.

	var FORMAT_ONELINE = 'One-line';
	var FORMAT_MULTILINE = 'Multi-line';
	var FORMAT_PRETTY = 'Pretty';

	var LANGUAGE_JS = 'JavaScript';
	var LANGUAGE_PYTHON = 'Python';

	## !! This snippet has been updated, but not tested in practice. It should work, please check / leave comments in case it doesn't. !! ##

	# originally from https://groups.google.com/a/webmproject.org/group/webp-discuss/browse_thread/thread/196ac4ea705688d8
	<IfModule mod_rewrite.c>

	# TODO: don't forget to put
	# AddType image/webp .webp
	# in your mods-available/mime.conf
	# (though this is optional because we're setting
	# the mime type manually in the RewriteRule)

	// Simple script that exports a users "Saved For Later" list out of Feedly
	// as a JSON string.
	//
	// This was intended for use in the Google Chrome's "Inspector" tool so your
	// mileage may vary if used in other contexts.
	//
	// Format of JSON is as follows:
	// [
	// {
	// title: "Title",

	def list_to_tree(input, none_and_holes=True, source=[0]):
	"""Transforms nestings of lists or tuples to a Grasshopper DataTree"""
	from Grasshopper import DataTree as Tree
	from Grasshopper.Kernel.Data import GH_Path as Path
	from System import Array
	def proc(input,tree,track):
	path = Path(Array[int](track))
	if len(input) == 0 and none_and_holes: tree.EnsurePath(path); return
	for i,item in enumerate(input):
	if hasattr(item, '__iter__'): #if list or tuple

	def unicode_it(data):
	# Take a string of data and convert it to unicode
	try:
	return unicode(data, errors="replace").strip()
	except TypeError as E:
	return u""

	def extract(msg, msg_obj, attachments):
	if msg.is_multipart():
	for part in msg.get_payload():