Mojca Rojko xtrinch

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

The Digilent JTag uses FT2232, but its configuration EEPROM contains secrete data needed to be recoginzed by Xilinx ISE/Vivado. The following method only works on linux (tested on Ubuntu16.04), but the patched FT2232 doggle also works on Windows. Since WSL1 does not provide USB device access, the following method will not work for WSL1.

DONT use FT_Prog on offical Digilent cable, as it can trash the firmware! The offical eeprom contains secrete data that cannot be handled correctly by FT_Prog.

Here are steps to create a Digilent-like Jtag that can be used in Xilinx ISE and Vivado

Install softwares: sudo apt-get install libftdi1 ftdi-eeprom
Create a file "flash_digilent.conf" with the following content:

	// add child view
	UIViewController* controller = [self.storyboard instantiateViewControllerWithIdentifier:@"test"];
	[self addChildViewController:controller];
	controller.view.frame = CGRectMake(0, 44, 320, 320);
	[self.view addSubview:controller.view];
	[controller didMoveToParentViewController:self];

	// remove child view
	UIViewController *vc = [self.childViewControllers lastObject];
	[vc.view removeFromSuperview];

	# taken from http://www.piware.de/2011/01/creating-an-https-server-in-python/
	# generate server.xml with the following command:
	# openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes
	# run as follows:
	# python simple-https-server.py
	# then in your browser, visit:
	# https://localhost:4443

	import BaseHTTPServer, SimpleHTTPServer
	import ssl

	- name: Install lxml requirements
	apt: "pkg={{ item }} state=present update_cache=yes"
	sudo: yes
	with_items:
	- python-dev
	- libxml2
	- libxml2-dev
	- libxslt1-dev
	- lib32z1-dev
	- libssl-dev

	# Chrono Trigger Soundtrack - Corridors of Time
	# plug this into http://sonic-pi.net/

	# still needs synth pads

	# global config
	use_bpm 112

	def play_legato_note(note_value, duration)
	release_duration = duration

	var viewer = new Cesium.Viewer('cesiumContainer', {
	targetFrameRate: 60,
	homeButton: false,
	sceneModePicker: false,
	navigationHelpButton: false,
	baseLayerPicker: false,
	clock: new Cesium.Clock({
	startTime: Cesium.JulianDate.fromIso8601('1880-01-01'),
	currentTime: Cesium.JulianDate.fromIso8601('1880-01-01'),
	stopTime: Cesium.JulianDate.fromIso8601("2013-12-01"),

	#!/usr/bin/env python
	import time
	import socket

	HOST = 'localhost'
	PORT = 9876
	ADDR = (HOST, PORT)

	serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	serversocket.bind(ADDR)

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>esptool.js</title>

	<script src="https://cdnjs.cloudflare.com/ajax/libs/xterm/2.9.2/xterm.min.js" integrity="sha256-8rsVcpCnO6HdeJL84i0VdubjM42fjSmO8aONghdq3gc=" crossorigin="anonymous"></script>
	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/xterm/2.9.2/xterm.min.css" integrity="sha256-w69o8Y6P5VZjfYFmn2KlqMU7TUi2I+oWObi8FLlVZZg=" crossorigin="anonymous" />
	</head>