We are currently developing a solution that uses Google’s BigQuery for data analytics. As part of this solution which is written in Golang, we need to perform some complex SQL queries (hundreds of lines each). …

By Effi Bar-She’an and some other guy Steps: Writing a Golang UDP server Testing our UDP server using netcat (nc), a utility for reading from and writing to network connections using UDP (or TCP) Configure and run nginx to send access-logs to our Golang server Create a custom access-log format …

By Reuven Harrison tl;dr oasdiff is a tool for comparing OpenAPI Specifications; also a Go module. OpenAPI Specification (previously known as Swagger) is a standard for documenting REST APIs. Here’s a small example: info: title: Tufin version: 1.0.0 openapi: 3.0.3 paths: /api/audit: get…

By Effi Bar-She’an Envoy is a L7 proxy and communication bus designed for large modern service-oriented architectures. Envoy can be used to monitor and control HTTP connections. One way to do this is using the Lua scripting language, for example to intercept requests and responses. …

By Reuven Harrison Hashing is an algorithm that generates a fixed-length string from an input. There are many different hash algorithms with different properties, for example, SHA-256. You can use openssl to generate a SHA-256 hash: echo -n 'secret' | openssl dgst -sha256 The output is the hash: 2bb80d537b1da3e38bd30361aa855686bde0eacd7162fef6a25fe97bf527a25b Hashes…

By Reuven Harrison Creating a tree in go is easy with the built-in map type: type Tree map[string]Tree If you want a richer node type you can use a struct as the key: type TreeNode struct { Name string Data int } type Tree map[TreeNode]Tree And for complex nodes (go…

By Effi Bar-She’an Analyzing files on an AWS S3 bucket is a common task with many examples for doing so available on the Internet, however, doing it in a way that enables unit tests, is somewhat of a mystery. So here’s a complete example of a golang client that: Downloads…

By Effi Bar-She’an and Reuven Harrison Say you’re a DevOps or a security manager and you want to make sure some or maybe all of your pods use Tor or some other proxy as an egress gateway. There are three ways to instruct a client to use a proxy: 1…

By Michael Furman, Tufin Security Architect. Google recently decided to roll out a new Chrome update with a new cookie policy that makes their browser more secure. This update includes two important changes to cookies that specifically relate to the SameSite Cookie attribute. …