Praveen Srinivasan cstpraveen

Service Workers Tips

Reloading a service worker

Reloading a page won't update/remove the previous version of its service worker. To make sure you're using the latest version of your service worker, make sure to check the "Update on reload" toggle in the "Application" ⭢ "Service Workers" section of the Chrome DevTools.

Simulate a network condition

To simulate a network condition (e.g.: offline, 3g, etc...) in a service worker on Chrome, uncheck the "Update on reload" toggle.

rest-api-response-format

REST API response format based on some of the best practices

Rest API Popular Endpoint Formats

https://api.example.com/v1/items

https://example.com/api/v1/items

Rest API Success Responses

Redis Cluster Setup with Docker Swarm

Setup

./redis.sh

Test

test the redis cluster

PromQL

Prometheus is a time-series db, it's query language called PromQL.

Here are some analogies from SQL which may help to understand the basics of PromQL better:

metric ~ sql table
label ~ sql column

example:

Count how many containers running on each node:

	navigator.serviceWorker.getRegistrations().then(function (registrations) {
	if (!registrations.length) {
	console.log('No serviceWorker registrations found.')
	return
	}
	for(let registration of registrations) {
	registration.unregister().then(function (boolean) {
	console.log(
	(boolean ? 'Successfully unregistered' : 'Failed to unregister'), 'ServiceWorkerRegistration\n' +
	(registration.installing ? ' .installing.scriptURL = ' + registration.installing.scriptURL + '\n' : '') +

	# Repo: someuser/myframework
	# Fork: superteam/myframework

	# Track:
	git clone https://github.com/superteam/myframework.git
	cd myframework
	git remote add upstream https://github.com/someuser/myframework.git

	# Update:
	git fetch upstream

	#!/bin/sh

	args=`getopt p:c:t:o:a: $*`
	if [ $? != 0 ]; then
	echo 'Usage: ...'
	exit 2
	fi

	set -- $args
	for i; do

	from flask import Flask
	from flask.ext.mongoengine import MongoEngine
	from flask.ext.security import Security, MongoEngineUserDatastore, \
	UserMixin, RoleMixin, login_required
	from flask.ext.principal import Permission, RoleNeed


	# Create app
	app = Flask(__name__)
	app.config['DEBUG'] = True

	function interceptNetworkRequests(ee) {
	const open = XMLHttpRequest.prototype.open;
	const send = XMLHttpRequest.prototype.send;

	const isRegularXHR = open.toString().indexOf('native code') !== -1;


	// don't hijack if already hijacked - this will mess up with frameworks like Angular with zones
	// we work if we load first there which we can.
	if (isRegularXHR) {

	FROM mysql:5.6
	MAINTAINER Your Name <[email protected]>

	COPY wait-for-mysql.sh /
	CMD /wait-for-mysql.sh