Richard Baker rjbaker

Alamofire JSON Serialization of Objects and Collections

Alamofire is a great Swift library developed by the creator of AFNetworking @mattt. The purpose of this gist is to explain how to use the built-in power of Alamofire to serialize your JSON. In this example we will be serializing a simple blog API. First we will start with serializing a single JSON object and add complexity as we go along.

Warning: This was written before Swift 1.2

A Single JSON Serialization

This is the first JSON object that we will be serializing.

HOLY GAWD PEOPLE..

Don't write all your new code on the production machine!
Use a VCS!
Document your functions using DocBlocks!
Document your API (at least LIST the endpoints)... I have to decipher the meaning from your code, and that isn't really clear
Use a single identifier as the primary ID in the API for a resource (ie don't return a list of group ids for listing groups and then expect the group name as the identifying parameter for modifying a group)
Use a consistent model for representing the same data model in different endpoints!
Don't concatenate fields in the API results unless there is a good reason to (e.g first name and last name)
Don't expose the underlying database logic. This is leaky abstraction, especially when you do it inconsistently!!

AWS ELB with Node.js and WebSockets

This assumes that:

You are using Nginx.
You want to accept incoming connections on port 80.
Your Node.js app is listening on port 3000.
You want to be able to connect to your Node.js instance directly as well as via the load balancer.

####1. Create load balancer

	<?php namespace App\Providers;

	use Illuminate\Support\ServiceProvider;

	/**
	* If the incoming request is an OPTIONS request
	* we will register a handler for the requested route
	*/
	class CatchAllOptionsRequestsProvider extends ServiceProvider {

	// for an updated version see https://github.com/jsdf/react-native-refreshable-listview

	var React = require('react-native')
	var {
	ListView,
	ActivityIndicatorIOS,
	StyleSheet,
	View,
	Text,
	} = React

	// MARK: Using NSURLSession

	// Get first todo item
	let todoEndpoint: String = "http://jsonplaceholder.typicode.com/todos/1"
	guard let url = NSURL(string: todoEndpoint) else {
	print("Error: cannot create URL")
	return
	}
	let urlRequest = NSURLRequest(URL: url)

	/*
	********************************************************************************
	Golang - Asterisk and Ampersand Cheatsheet
	********************************************************************************

	Also available at: https://play.golang.org/p/lNpnS9j1ma

	Allowed:
	--------
	p := Person{"Steve", 28} stores the value

	server {
	client_body_in_file_only clean;
	client_body_buffer_size 32K;

	client_max_body_size 300M;

	sendfile on;
	send_timeout 300s;
	# Port that the web server will listen on.
	#listen 80;

	# post_loc.txt contains the json you want to post
	# -p means to POST it
	# -H adds an Auth header (could be Basic or Token)
	# -T sets the Content-Type
	# -c is concurrent clients
	# -n is the number of requests to run in the test

	ab -p post_loc.txt -T application/json -H 'Authorization: Token abcd1234' -c 10 -n 2000 http://example.com/api/v1/locations/

	#!/bin/bash

	MONGO_DATABASE="your_db_name"
	APP_NAME="your_app_name"

	MONGO_HOST="127.0.0.1"
	MONGO_PORT="27017"
	TIMESTAMP=`date +%F-%H%M`
	MONGODUMP_PATH="/usr/bin/mongodump"
	BACKUPS_DIR="/home/username/backups/$APP_NAME"