GitHub - aeimer/go-error-simulator: HTTP Server with control over response code, latency, stdout and stderr

go-error-simulator

This simple app is an HTTP server which lets you control the response and behavior in several ways. Options are:

• returned HTTP status code
• print text to STDOUT
• print text to STDERR
• add a (random) delay before returning the response

Usage

Run locally

Then you can access the server at http://localhost:8080.

Run via Docker

docker run -p 8080:8080 -it --rm ghcr.io/aeimer/go-error-simulator:latest

Then you can access the server at http://localhost:8080.

API

GET /

Returns a simple HTML page with a link to the API documentation.

GET /simulate

Simulates an error based on the query parameters. The following parameters are supported:

• status: HTTP status code to return (default: 200)
• stdout: text to print to STDOUT (default: empty)
• stderr: text to print to STDERR (default: empty)
• latency: delay in milliseconds before returning the response (default: 0)
  • exact number: latency=100
  • random range: latency=100-200
  • random range shortcut: latency=-100 (random between 0 and 100)

Examples:

curl "http://localhost:8080/simulate?status=200"
curl "http://localhost:8080/simulate?status=500&stdout=Hello%20World&stderr=Error%20Message&latency=100"
curl "http://localhost:8080/simulate?status=404&stdout=Not%20Found&latency=200-300"
curl "http://localhost:8080/simulate?status=200&stdout=OK&latency=-100"