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Backend as a Service

Supabase - ~52K stars

• Designed explicitly as an open source firebase alternative
• Typescript based
• Docker support

Appwrite - ~32K stars

• Written in JavaScript and PHP
• Docker based
• Realtime support across all services

chansdad

// Implement a Graph
// basic operations:
//  - add vertex (node)
//  - add edge (node -> node)

function GraphNode(val) {
  this.val = val;
  this.edges = {};
}

chansdad

Notes on Raspberry Pi

Initial default username password for Raspbian

username: pi
password: raspberry

Update Locale to support "US"

Need to add US support in addition to default GB, including language, keyboard, etc.

$ raspi-config

chansdad

import gevent
from gevent import monkey; monkey.patch_all()
from gevent_zeromq import zmq
import simplejson as json
import threading
import time

def server(context):

    poll = zmq.Poller()

chansdad

#!/usr/bin/bash

# Download zeromq
# Ref http://zeromq.org/intro:get-the-software
wget https://github.com/zeromq/libzmq/releases/download/v4.2.2/zeromq-4.2.2.tar.gz

# Unpack tarball package
tar xvzf zeromq-4.2.2.tar.gz

# Install dependency

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"""UDP proxy server."""

import asyncio


class ProxyDatagramProtocol(asyncio.DatagramProtocol):

    def __init__(self, remote_address):
        self.remote_address = remote_address
        self.remotes = {}

chansdad

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
#  @file     gevent_zmq_redis_demo.py
#  @author   kaka_ace <[email protected]>
#  @date     Tue Oct 14 2014

"""
    fetures: there are two concurrent tasks
    1. From Redis server, Getting the notify msg with BLPOP operation, 

chansdad

#include <discovery_msgs/beacon.capnp.h>
#include <zmq.h>

#include <assert.h>
#include <capnp/message.h>
#include <capnp/serialize-packed.h>

#include <iostream>

/**

chansdad

# Sticky session module for nginx
# https://bitbucket.org/nginx-goodies/nginx-sticky-module-ng/
# nginx configure command: ./configure --with-http_ssl_module --add-module=../nginx-sticky-module-ng/ --sbin-path=/usr/local/sbin --with-http_gzip_static_module

upstream vida_node_server {
    sticky path=/;
    server 127.0.0.1:3000 max_fails=3 fail_timeout=30s;
    server [server2]:3000 max_fails=3 fail_timeout=30s;
}