Monthly Archives: May 2017

LombaXMonday N° 6 – links and resources from the IT World

What is this? Every day I read a lot of articles about computer programming and languages, infrastructures, new technologies, quick tips, trends, architectures and so on. I read them immediately or put in my “read later” list. All my readings helped me to grow and learn new things…so why don’t share them with my readers? For this reason, I decided to publish and share, every monday, a list of the links I came accross during the past days.


JQ, an useful tool for handling JSON - link and link

JQ is a very useful command line tool for handling JSON.
It permits you to extract parts of a JSON using a simple syntax.

Look at this example

If you want to take the Title and the Acronym (and change their name):

curl 'https://www.lombax.it/documents/json.json' | jq '.glossary | {MyTitle: .title, MyAcronym: .GlossDiv.GlossList.GlossEntry.Acronym}'

Explore utf8mb4 performance in the new MySQL 8.0 (not yet released) - link

MySQL 8.0 is in the last phases of the development process and it brings a lot of new features. One of this is an huge increase in performances even using the news utf8mb4 encoding.


HTTPS on StackOverflow - link

Implementing HTTPS on a website may seem simple and straightforward. But what happens when you manage the world biggest Q&A site with hundreds of domains?
Enjoy this (long but good) post by Nick Craver


That’s all for today’s LombaXMonday, if you liked it, have any question or want to let me know that this article sucks, don’t hesitate to add a comment :-)

LombaXMonday N° 5 – links and resources from the IT World

What is this? Every day I read a lot of articles about computer programming and languages, infrastructures, new technologies, quick tips, trends, architectures and so on. I read them immediately or put in my “read later” list. All my readings helped me to grow and learn new things…so why don’t share them with my readers? For this reason, I decided to publish and share, every monday, a list of the links I came accross during the past days.


Inspect and inject HTTP/HTTPS requests with mitmproxy - link

Mitmproxy is an useful tool for web developers. It permits to inspect web requests (https requests to) acting as a middleware between your browser and the final url. Yes, modern browser inspectors gives us the inspection functionalities without installing anything, but mitmproxy permits you to block/pause the requests and inject/change the content manually. You can add filters on specific words/patterns in the request (url, cookies and so on), and then mitmproxy will block the request and wait for your input. Then, you will be able to change the request content. This is useful expecially when debugging complex request/response flows: you will be able to do all the flow via browser, and then add a “breakpoint” only when needed. Cool


Cloud Computing comes at a price - link

Short story of a startup that forgot that “pay per use” is not always as cheap as it seems…expecially if you don’t make correct planning


That’s all for today’s LombaXMonday, if you liked it, have any question or want to let me know that this article sucks, don’t hesitate to add a comment :-)

LombaXMonday N° 4 – links and resources from the IT World

What is this? Every day I read a lot of articles about computer programming and languages, infrastructures, new technologies, quick tips, trends, architectures and so on. I read them immediately or put in my “read later” list. All my readings helped me to grow and learn new things…so why don’t share them with my readers? For this reason, I decided to publish and share, every monday, a list of the links I came accross during the past days.


Cars and satellite insurance, how to do it (wrong) - link

Andrea Scarpino tell us how he discovered a big security issue in the API provided by his insurance company. With a little bit of reverse engineering on the satellite device provided by the company, he was able to retrieve all the personal informations of all the insurance customers.


Interactice shell scripts with expect command - link

Everyone have tried, at least once, to automate a task writing a simple bash script.
However, how to handle a prompt (for example a password prompt?).

`expect` is a simple program that, with an easy-to-learn syntax permits you to write scripts that expect for a specific prompt before sending something back


MySQL multiple keys and indexes, did you know? by Enomis-

Let’s assume that we have this simple table with an huge quantity of data:

CREATE TABLE test (
id INT NOT NULL,
last_name CHAR(30) NOT NULL,
first_name CHAR(30) NOT NULL,
PRIMARY KEY (id),
INDEX name (last_name,first_name)
);

as you can see, we have an index on last_name, first_name

Now, try to query it:

select * from test where first_name=’Fabio’ and last_name=’Lombardo’; // time: 0.5sec

select * from test where last_name=’Lombardo’ and first_name=’Fabio’; // time: 0.01sec

Why this difference?
In MySQL, multiple indexes must be queried in the exact order they have been declared.

More informations:

- Multiple-Column Indexes
- Avoiding Full Table Scans
- Index Hints


That’s all for today’s LombaXMonday, if you liked it, have any question or want to let me know that this article sucks, don’t hesitate to add a comment :-)

LombaXMonday N° 3 – links and resources from the IT World

What is this? Every day I read a lot of articles about computer programming and languages, infrastructures, new technologies, quick tips, trends, architectures and so on. I read them immediately or put in my “read later” list. All my readings helped me to grow and learn new things…so why don’t share them with my readers? For this reason, I decided to publish and share, every monday, a list of the links I came accross during the past days.


Check the technology behind a website. Is it WordPress? Is it Joomla? - link

Do you want to know what technology power up a website? Tired of inspecting html and headers for clues? Is it WordPress? Is it Joomla? Don’t worry, simply paste the URL in the provided link and enjoy the results


ES6 Overview In 350 Bullet Points - link

A quick and easy recap of all the new features and syntax changes of ES6


Testing code that emits output and native functions in PHP - link

You know (and if you don’t, you should!!! :-), the scope of TDD is to test pieces of software to avoid that it breaks when you change something. It’s very useful because you can simply “run tests” and be sure (if you wrote and structured them correctly) that your changes didn’t affect anything. However, writing good tests is not as simple as it seems, and TDD have various type of tests (for example Unit Tests, Integration Tests, Behavior Tests and so on).

In this link we focus on Unit Tests. In Unit Tests, the difficult part is to decouple things and test all classes as separate, independent entities and test them against their interfaces. You test that, when the contract is respected (when you call their method with the correct dependencies), the class behaves as expected.

To create a successfull Unit Test, it’s very important to test objects only against their interfaces and to mock (see Mockery for php, for example) all their dependencies. With mocks, you create fake dependencies (objects) and check the correct sending/receiving on messages by/to the tested class. You focus mainly on the “communication” between the tested object and the rest of the world. With mocks, you can test a single object without having to integrate all the things together (for example, you can test a query builder without having to use a real database during the test phase).

However, when it comes to native php functions, it seems difficult to create mocked functions and objects. With this guide, you will learn some useful trick and Php language features that will help you in the building of your Unit Tests.


 

That’s all for today’s LombaXMonday, if you liked it, have any question or want to let me know that this article sucks, don’t hesitate to add a comment :-)

LombaXMonday N° 2 – links and resources from the IT World

What is this? Every day I read a lot of articles about computer programming and languages, infrastructures, new technologies, quick tips, trends, architectures and so on. I read them immediately or put in my “read later” list. All my readings helped me to grow and learn new things…so why don’t share them with my readers? For this reason, I decided to publish and share, every monday, a list of the links I came accross during the past days.


Monitor your AWS CloudTrail events with Slack and GorillaStack - link

Although it is based on a commercial product, at the provided link you can find a free Slack Bot that will monitor all your AWS CloudTrail events and alert you when something happen. Personally,  I added some triggers to increase the security of our AWS Account: I get an alert when a user login to the AWS Console, when an AWS EC2 Instance is created, rebooted or terminated. It is very easy to install: after adding it to slack, a Cloudformation template that creates everything will be provided, basically an IAM Role, an S3 Bucket, a Lambda function and all the needed CloudTrail configurations are created automatically with a simple step-by-step procedure.


Expose your local development website over a public URL - link

So, you have created a brand new website and you want to show to your customer. But you haven’t yet deployed it to the hosting provider, it’s only available on your local machine via http://localhost. No worries, with ngrok you will be able to share it immediately, via a public URL, writing a simple command. No need to setup a VPN, and event supporting SSL.

Simply install it, write this in your terminal

ngrok http 80

and your site will be publicly available on an URL similar to this: http://xyza335.ngrok.io


What is CQRS? - link and link

Martin Fowler gives us a brief explanation of what is CQRS and its benefits. By splitting the model in two parts (one dedicated to the **query** and the other dedicated to the **command** part) structured applications with complex domains can have huge benefits. But be aware that all comes to a price…don’t over engineer :-)


 

That’s all for today’s LombaXMonday, if you liked it, have any question or want to let me know that this article sucks, don’t hesitate to add a comment :-)