A simple spring boot application, exposing a post endpoint, and dumping the body into a file. Used in association with ngrok to test how webhooks defined on some services (slack, Linear, ...) are working.

To launch the app:

mvn spring-boot:run

Note. This app use Maven 3.9 and Java 21.

To request the endpoint

curl -XPOST localhost:8080/ -H "Content-type: application/json" -d'{"hello":"world"}'
# A file dump_<timestamp>.json containing {"hello":"world"} is created on src/main/resources

With <timestamp> the timestamp (long) in seconds corresponding to the moment where data are dumped in the file.

For a content-type different that application/json, it will by default write the data in the file as a string, with the extension .txt. For example:

curl -XPOST localhost:8080/ -H "Content-type: text/plain" -d'{"hello":"world"}'
# A file dump_<timestamp>.txt containing "{\"foo\": \"bar\"}" is created on src/main/resources