Gotcha: Segfault when HTTP headers include newlines with Go (2 mins read).
Why you may be receiving a segfault when using http.Client with HTTTP headers that include newlines.
by 
Jamie Tanna
.
#blogumentation
#go.
Blog posts from February 2022
Converting Spring Boot Property Variables to Environment Variables with Go (1 mins read).
A command-line script to convert a Spring Boot property to an environment variable.
by Jamie Tanna
.
#blogumentation
#go
#command-line
#spring-boot.
Pretty Printing JSON Web Tokens (JWTs) on the Command Line using Go (2 mins read).
How to easily introspect and pretty print a signed JWT (JWS) or an encrypted JWT (JWE) on the command line using Go.
by Jamie Tanna
.
#blogumentation
#go
#command-line
#jwt
#json
#pretty-print.
Gotcha: Field casing is important when marshalling structs to JSON in Go (2 mins read).
Why you may be missing fields from your structs in your Go json.Marshal calls.
by Jamie Tanna
.
#blogumentation
#go
#json.
Testing @Scheduled annotations with Spring (Boot) (2 mins read).
How to test your Spring (Boot) scheduling without waiting for hours.
Creating a "Manual of Me" (1 mins read).
Creating a reference document about how to best collaborate together.
by Jamie Tanna
.
#manual-of-me
#css.
Reading all of stdin on the command-line with Go (1 mins read).
How to read the whole of stdin, up to EOF, with Go.
Pretty Printing JSON on the Command Line with Go (1 mins read).
Using Go's JSON module to pretty print JSON objects from the command line.
Exporting a Git repo as an archive (1 mins read).
How to export a Git repo as an archive format, such as a .tar.gz or a .zip.
by Jamie Tanna
.
#blogumentation
#git.
How to interpolate a property inside Spring Security @PreAuthorize / @PostAuthorize (3 mins read).
How to use the value of a property in a Spring Security authorization statement.
by Jamie Tanna
.
#blogumentation
#java
#spring
#spring-boot
#spring-security.
Combining an Audio-only and Video-only MP4 with ffmpeg on the command-line (1 mins read).
How to use ffmpeg to combine two MP4 files, where each file contains audio and video separately.
Determining if the Spring Boot Application is Running in Debug or Trace Mode (3 mins read).
How to determine if your Spring Boot application is running in debug mode, for instance to selectively enable other features of your application.
Adding a Wiretap to a Spring WebFlux WebClient to Log All Request/Response Data (2 mins read).
How to log all request/response data from a Spring Webflux WebClient.
by Jamie Tanna
.
#blogumentation
#java
#spring-boot
#spring.
Simplifying Spring (Boot) ExceptionHandlers by extending ResponseStatusException (1 mins read).
How to drive HTTP response status codes from exceptions by extending Spring's ResponseStatusException.
by Jamie Tanna
.
#blogumentation
#java
#spring-boot
#spring.
Bundling Multi-File OpenAPI Documents into a Single File (2 mins read).
Looking at the options we have for converting a multi-file OpenAPI specification to a single document.
Announcing openapi.tanna.dev, a client-side OpenAPI Viewer (1 mins read).
Creating a hosted version of a local and client-side only OpenAPI viewer.
Generating Favicons using ImageMagick on the Command-Line (1 mins read).
How to generate a multi-size favicon.ico on the command-line using ImageMagick.
by Jamie Tanna
.
#blogumentation
#command-line
#imagemagick.
Please Add a Relevant Publish Time to Blog Posts (2 mins read).
A request to bloggers to not use midnight as the time they publish an article.
by Jamie Tanna
.
#blogging.
Excluding Filters When using WebMvcTest (1 mins read).
How to exclude specific Filters from running when performing WebMvcTests.
by Jamie Tanna
.
#blogumentation
#java
#spring
#spring-boot
#testing
#tdd.
Integration Testing Your Spring WebClients with okhttp's MockWebServer (5 mins read).
How to write integration tests using MockWebServer with Spring Boot, for use with WebClients.
by Jamie Tanna
.
#blogumentation
#java
#spring-boot
#testing
#tdd.
Capturing HTTP Requests with okhttp's MockWebServer.takeRequest (1 mins read).
How to use MockWebServer's takeRequest method to verify that HTTP request(s) are sent correctly.
by Jamie Tanna
.
#blogumentation
#java.
Generate Plain Old Java Objects (POJOs) from OpenAPI Model Definitions with Gradle (2 mins read).
How to generate POJOs really quickly and easily, with no manual work, using the Gradle openapi-generator Plugin.
Running Elements API Viewer to Verify Local OpenAPI/Swagger Documents (2 mins read).
How to run Elements UI locally to visualise OpenAPI documents.
I don't think you should be logging that? 😳 (12 mins read).
Common pitfalls and dangerous things that you should be watching out for in your log messages.
by Jamie Tanna
.
#blogumentation
#logs.
Validating a MockMvc Response Has No Content Type (1 mins read).
How to validate, in a MockMvc test, whether the response has no content-type nor a body.
by Jamie Tanna
.
#blogumentation
#spring
#spring-boot
#testing.
Replacing Text in Vim with the Output of a Command (1 mins read).
How to replace text under the cursor with the output of a command.
by Jamie Tanna
.
#blogumentation
#vim
#neovim
#command-line.
Integration Testing Your Spring RestTemplates with RestClientTest, using spring-test (8 mins read).
How to write integration tests using RestClientTest with Spring Boot, for use with RestTemplate and RestTemplateBuilders.
by Jamie Tanna
.
#blogumentation
#java
#spring
#spring-boot
#testing
#tdd.