The Backend Engineering Show with Hussein Nasser

Soap (Simple Object Access Protocol) has been a popular messaging protocol in the early 2000s. It uses XML as a format with well defined schema, and your choice of stransport protocol. Despite it still being used people have been moving towards #REST architecture and more so #gRPC recently. In this episode we discuss why people moved from #SOAP and what are the advantages and disadvantages of SOAP.   Stay Awesome! Hussein Nasser

In this episode we answer a question from Anthony. How do you know when to focus on building a geodatabase (let's say SQL server database) rather than just let the data sit in the shapefile? I would say if you are planning to have multiple users accessing and editing the data, also if your data grew too large shape files might not be scalable to read. Also if you are planning to use the capabilities of Geodatabase such as domains, subtypes, attribute rules, versioning, archiving etc not to mention sharing as well. if you wont plan to use any of the above then shape file is a good choice. If you are planning to just maintain a shape file data of 10k or 100k features and you edit it yourself locally it works!

When you publish a service you can specify how many processes (min / max) your service can use. As requests are being served memory is allocated, state is changed, some processes could go corrupt Recycling is the process destroying and re-spawning processes that are running to maintain a good memory footprint.  Here is a good read on recycling http://enterprise.arcgis.com/en/server/latest/publish-services/windows/tuning-and-configuring-services.htm Enjoy Hussein

 I don’t have the equipments. There are people doing that already. And my personal favorite, I don’t know enough.  Excuses are always there, In this podcast I talk about my personal story of how I got started. You don't need fancy equipments to share your skills and knowledge. In this podcast we discuss how with just a screen sharing app (Quicktime) and this microphone I was able to grow my youtube software engineering channel to 2000 subs and more than 1 million watch hours.  

A podcast about the difference between a layer and its data source. Enjoy!

Vikrant asked a question on Linked:  Dear Hussein, I want to learn programming for GIS. Is python useful? I am not very good in programming. Kindly guide. And thanks for the posts.. Programming for GIS really depends on what you are trying to do and how do you want to advance your career. In this podcast we will discuss four kind of areas where you can programming for GIS. GIS Admin Programming GIS Desktop Programming GIS Web Programming  GIS Server Programming Enjoy

If you ever go a website and there some images you liked to reference in your page or blog. You would copy the link, and put in your blog.  Only to find out that the image looks broken?  You copy the link again and paste it in URL and it opens fine?  This is an effect of CORS or cross origin resource sharing.  https://husseinnasser.com/courses

 ArcGIS Server is a technology that allows you to pull your heavy work load on the backend and isolate the clients from complexity of the database by exposing HTTP services instead of low level TCP database. You can also extend the server capability by writing your own extensions.  In this episode ArcGIS Server talk we will talk about two ways you can extend your ArcGIS server, Server Object Extensions and Server Object Interceptors. Server Object Extension  Extends the MapServer to allow you to write your own logic that cannot be easily done by built - in Feature Server or Map server. Or it is more performant to do it.   Users create new excavation I want to auto-calculate the price of the excavation based on the soil type, whether there are trees, rocks.  Server Object Interceptors  You don’t write new thing you instead intercept existing calls to query and applyEdits to inject your own logic to pre or post processing. Lets say every-time any application tries to write to the service, you want to verify that the edit is permissible. Include water marks to all images that are downloaded. Learn more about SOE vs SOI here http://enterprise.arcgis.com/en/server/latest/publish-services/linux/about-extending-services.htm

Any content served through HTTP “should” include meta data about its type. This is so the browser/client knows what to do with the content it receives. For example, if the content type header is an image the browser will preview it, if it is HTML it will render the markup and execute any javascript code. Content type however is optional and web masters sometimes don’t set it, which leave the browsers wondering about the content type it is consuming. So browsers had to implement parsing and “sniffing” techniques to detect the type of content when a content type header was not served. However, this caused security problems and attacks that we explain in this video! So to prevent sniffing, web servers can return X-Content-Type-Options: nosniff which opts out browsers from sniffing the content. Media type: https://en.wikipedia.org/wiki/Media_type#Common_examples Cheers! Hussein Nasser

Thank you so much guys for a great year! I love you. -Hussein 2018 was a great year:    Created, edited and posted 120 software engineering youtube videos with over 1.1 Million impressions   Published 75 podcasts with over 8k plays    Self Published a new GIS book   Published two programming online courses  #hustle