Ivan Velichko iximiuz

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Summary

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Pico HTTP Server in C

This is a very simple HTTP server for Unix, using fork(). It's very easy to use

How to use

include header httpd.h
write your route method, handling requests.
call serve_forever("12913") to start serving on port 12913

Here's how you could create custom error classes in Node.js using latest ES6 / ES2015 syntax.

I've tried to make it as lean and unobtrusive as possible.

Defining our own base class for errors

errors/AppError.js

2023 update

ℹ️ Please note this research is from 2016 when Opera has first added their browser "VPN", even before the "Chinese deal" was closed. They have since introduced some real VPN apps but this below is not about them.

🕵️ Some folks also like to use this article to show a proof that the Opera browser is a spyware or that Opera sells all your data to 3rd parties or something like that. This article here doesn't say anything like that.

When setting up (that's immediately when user enables it in settings) Opera VPN sends few API requests to https://api.surfeasy.com to obtain credentials and proxy IPs, see below, also see The Oprah Proxy.

The browser then talks to a proxy de0.opera-proxy.net (when VPN location is set to Germany), it's IP address can only be resolved from within Opera when VPN is on, it's 185.108.219.42 (or similar, see below). It's an HTTP/S proxy which requires auth.

TL;DR

Install Postgres 9.5, and then:

sudo pg_dropcluster 9.5 main --stop
sudo pg_upgradecluster 9.3 main
sudo pg_dropcluster 9.3 main

Node streams - a fractal of weird design

and a potential refactor that could fix that

This is a list of issues and confusions I've encountered with node streams, and things I wish were designed and implemented differently. If promise-streams is ever going to change to a design that doesn't build on top of node streams, this would be a list of mistakes to avoid

enc parameter - Why is encoding always passed together with the data? It should be a separate concern. It doesn't even make sense in objectMode
eventemitter base - This encourages a lot of random events to be "attached" by other authors which doesn't work. Best to have an uniform (typed) interface so that everyone knows what to expect.
relying on nextTick etc for execution order - This is very unreliable and causes all sorts of unpredictable rules for implementers which are not documented anywhere. When you attach listeners determines what will happen.
no error propagation - we need the

	// Thomas Karpiniec, 1 Sep 2017
	// Companion code to https://karp.id.au/a/2017/09/01/layer-2-raw-sockets-on-rustlinux/

	extern crate libc;
	use std::io;
	use std::ptr;
	use std::mem;
	use std::collections::HashMap;
	use std::net::Ipv4Addr;

	// Port of the C# 101 LINQ Samples rewritten into Apple's Swift 3.

	#![feature(ordering_chaining, step_by)]

	fn main() {
	// linq5: Where - Indexed
	/*
	//c#
	public void Linq5()
	{

	package main

	import (
	"bufio"
	"io/ioutil"
	"os/signal"
	//"syscall"
	"fmt"
	"log"
	"os"

	with table_stats as (
	select psut.relname,
	psut.n_live_tup,
	1.0 * psut.idx_scan / greatest(1, psut.seq_scan + psut.idx_scan) as index_use_ratio
	from pg_stat_user_tables psut
	order by psut.n_live_tup desc
	),
	table_io as (
	select psiut.relname,
	sum(psiut.heap_blks_read) as table_page_read,