Python Flask Web Development: REST API, Postman & JavaScript

REST API stands for representational state transfer application programming interface.  So let's first look at their representation state transfer. Some of the simple questions that might come up when you're first starting to understand the REST API is what is being represented exactly what is a state and what’s being transferred OK. So let's look at all these words individually and I hope I can explain what they all mean OK so the word representation means there is a transfer of representations of resources and the resources can be pretty much anything they can be named on the Internet like a user and a list of users a photo or a list of photos comments post articles page video a book profile etc.

Welcome today I want to talk about REST API concepts an examples. But first what is an API? API stands for application programming interface and basically it’s something that allows one piece of software to talk to another and there are lots of different kinds of API but when you hear people talk about Twitter's API or Google’s API what they're talking about is a REST API and the REST API stands for representational state transfer. Now it doesn't have to be the case but usually the REST API works pretty much the same way a website does you make a call from a client to a server and you get data back over the http protocol. 

In this tutorial we are going to be learning a much needed relief factor of our tests which is a flask extension called flask testing. It adds a number of useful features beyond the standard python unit test library. So let's start by running our current test suite and now let’s install flask testing by running pip install flask testing thereafter we add it to our requirements. I'm going to open up our tests.py here and type from flask.ext.testing import Testcase then in the next line we add from project import app, db. 

In this tutorial I want to show you a tool that will make developing A.P.Is so much easier, so this tool is used to send requests to your A.P.I. and get the responses. So it's really easy to use and this tool is called postman. Postman is an extension for Chrome and you can get it in Chrome web store. So am going to show you a few things that you can do with it and there are more things that you can play with later.  So am going to start postman and it's really cool because for one it's easy to specify which method you want to use which H.T.T.P. method is it GET POST PUT PATCH DELETE COPY and some others. 

In this tutorial we would be learning functional testing in SoapUI and we are going to be using SoapUI pro. OK let's get started lets create a new SoapUI project and let’s call it demo and I will place in this URL and this URL is available in the functional testing page underneath the Getting Started section and click OK. And as a result I get this service here presented on the left hand side along with these three operations. The service allows me to type in a country code and get the corresponding info about that country, underneath each operation SoapUI has generated a sample requests. If I open the third sample request here I get the form of you presented which is only available in the pro version and it basically lists all the different fields available that I can post against my web servers. So you can simply fill in the data and send off the requests. 

In this tutorial we will be talking about RESTful Api. I am sure you guys must be a little bit confused about the difference between REST and RESTful. Well let me demystify that confusion. As explained in the previous tutorial, REST stands for Representational State Transfer which has risen as the standard architectural outline for web administrations and web APIs. 

Building web services with Flask is shockingly basic, significantly less complex than building complete server-side applications. There are two or three Flask extensions that assist with building RESTful services with Flask; however, the task is simple to the point that as I would like to think there is no compelling reason to utilize an extension. We are going to be creating our first API using the GET, PUT, and POST AND DELETE REQUESTS. We are going to be starting with GET request. 

In this tutorial I'll be showing you how to authenticate a flask A.P.I. using JSON Web tokens. So the first thing that I need to do for my A.P.I. is set up a couple routes one route will be for logging in another route will be a protective route so this can only be seen if you are authenticated and a final route will be a route where anybody can see it.

Flask is a database controlled application, and all the more unequivocally, it is an application fuelled by a relational database system. Such systems require a schema that discloses to them how to store that information.

In this tutorial I'll be introducing you to flask WT forms. So flask WT forms is an extension that wraps WT forms and WT forms is a Python library that makes handling forms in your apps a lot easier so if you've used SQLAlchemy before there are some similarities you create a class to represent a form just like you create a class or represent a row or a table in SQLAlchemy and then the objects will be dealt with directly to handle the form data. So to get started I need to import from flask so from flask import flask and I'll also be rendering templates. 

In this tutorial I'll be showing you how to use flask to accept file uploads and save them to a database. so the first thing I should say is you don't always want to save files to the database oftentimes it’s better to save into the file system and just save like the path to the file in the database. But if you do want to save the files of the database for whatever reason it can be simpler in some cases than this tutorial is for you. So I already have a really basic class gap here is just returning an index.html file and this is just a basic file input form that I'm going to get started working with. 

In this tutorial I want to make a log in form and a page that is protected by the session so if the user is not logged in they won't be able to use this page and if they are logged in then they can view it. So to start let me quickly built the pages that need to be handled i.e. that need to be shown when they want to view them. So I have these two pages indexed.html and protected.html that have no body yet but I'll do that now so on protected page I'll just say something like welcome to the protected page and for the index page I will say something like please log in. 

An idea according to business dictionary is a ‘’thought or collection of thoughts that generate in the mind. An idea is usually generated with intent, but can also be created unintentionally. Ideas often form during brainstorming sessions or through discussions’’. ideas change us, transport us, and influence us to address life as we probably know it: "Once the brain is extended by another idea, it will stay away and never return to its unique position.

A 'Specification is the bit of paper(s) that proclaims what your app does and how it is accomplished. It's the diagram or sketch or maybe blueprints. There are many approaches to complete a spec, extending from the lighter (additionally now and then called a 'brief') to the encompassing complete enveloping breakdown. Regardless of which way you go about it, always carry out a spec.

Next up, is the development of the app. In an ideal world, the individual in charge of building up the app has been a part of every single past stage, ringing in with his or her experience, thinking on the difficult level of usage of different proposed designs, and examining best practices as far as structure, devices, libraries, et cetera. 

Getting your first job as web developer sometimes can be a pretty daunting task. Many new junior web developers or web designers are always very curious about how they can get web development job, they keep asking questions where do I begin? What should I be focusing on? How can I get a job at this Tech Company? Etc. all these questions and many more will be answered in this section. But first let’s talk about the real requirements needed for landing your first web development job.

There is only one place for you to easily find a web development job in your city, and that place is the internet. The Internet offers an awesome number of online resources that can enable you to get an employment. Despite the fact that the competition for occupations is furious and fierce, regardless of whether you're searching for a full-time career, a contract project, some brisk independent work, or something unique, the web offers designers and engineers an abundance of openings for work 

The entertaining thing about the recruiting procedure is that on the off chance that you read job ads, you'd think that employers are entirely looking for individuals with certain kinds of experience. When you land to a job interview, the entire picture changes, employers are looking for qualities in their new employee that are never recorded in the job ad. They want to meet individuals who are self-coordinated and mindful. You will bring out those attributes through your answers to the job interview questions and also through the questions you ask your interview.

Going into the interview, it's vital to comprehend the company's point of view on employing you. On the off chance that you've made it this far, everybody who is interviewing you may or may not employ you. Interviewing is a tedious, exhausting experience for companies and team members too. In the event that a company is employing, they are likely hiring since they have more work they have to do than the present group is prepared to do. The hiring procedure is helping the group get back the one resource they don't have enough of right now: time.

You have notoriety for being the best coder however it adds up to little in the event that you don't cooperate with other people. Probably the most important expert aptitudes for specialists and employers alike can't be instructed in a classroom or estimated on paper. These attributes are called soft skills and they're more critical to your pursuit of employment and overall career than you might suspect.