Why use AWS Glacier for big data backup? It’s exceedingly inexpensive to archive data for disaster recovery on Glacier. AWS Glacier is only US$0.004 per GB/mo, and their SDK is beautiful. Here I outline a pricing matrix for cloud storage providers, and I take a look at the Java SDK for working with AWS Glacier to effectively archive 200GB a week.
This is a problem story about how I preferred Java to other languages to communicate with a troublesome financial REST API endpoint because Java is a strongly-typed and verbose language where it is easy to write unit tests and build up solid modules to make a complete, resilient project.
Sometimes you need to be alerted when a website string is present or absent. Here I outline a quick and easy method to alert you to such changes specifically in JSON data using just a free Chrome browser extension. I then showcase two case studies how this has helped me with retail shopping and domain name purchasing.
This would make a good interview question: There are about 120,000 public North American securities, bonds, rights, and index symbols. You have a paid API that can access all of them in OHLCV format if they are quotable. There are two critical API constraints: 15,000 calls per hour 30 calls per second Napkin math Minute […]
When getting started with LINE API messaging, you need to know the mid of a message recipient. It’s not his/her username. It’s a string that looks like ub8dbd4a12c322f6c0118883d839c55a4. LINE utilizes a callback URL that you can set for your trial LINE bot. At this endpoint you can place a script, shown below, which will report […]
Sometimes one of my sites is under attack from a click-fraud campaign. I needed to devise a way to detect such an attack and instantly and automatically change my Cloudflare security level from ‘medium’ to ‘under attack’. When in under-attack mode, Cloudflare performs additional browser checks to filter out robots. It doesn’t stop all the […]